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  • 1.
    Akbas, Meltem Yesilcimen
    et al.
    Department of Molecular Biology and Genetics, Gebze Institute of Technology, Gebze, Turkey.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ozcelik, Busra
    Department of Molecular Biology and Genetics, Gebze Institute of Technology, Gebze, Turkey.
    Improved ethanol production from cheese whey, whey powder, and sugar beet molasses by “Vitreoscilla hemoglobin expressing” Escherichia coli2014Ingår i: Bioscience, biotechnology and biochemistry, ISSN 0916-8451, E-ISSN 1347-6947, Vol. 78, nr 4, s. 687-694Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This work investigated the improvement of ethanol production by engineered ethanologenic Escherichia coli to express the hemoglobin from the bacterium Vitreoscilla (VHb). Ethanologenic E. coli strain FBR5 and FBR5 transformed with the VHb gene in two constructs (strains TS3 and TS4) were grown in cheese whey (CW) medium at small and large scales, at both high and low aeration, or with whey powder (WP) or sugar beet molasses hydrolysate (SBMH) media at large scale and low aeration. Culture pH, cell growth, VHb levels, and ethanol production were evaluated after 48 h. VHb expression in TS3 and TS4 enhanced their ethanol production in CW (21–419%), in WP (17–362%), or in SBMH (48–118%) media. This work extends the findings that “VHb technology” may be useful for improving the production of ethanol from waste and byproducts of various sources. 

  • 2.
    Akpinar, Ilgin
    et al.
    Istanbul University.
    Unal, Muammer
    Istanbul University.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Potential antifungal effects of silver nanoparticles (AgNPs) of different sizes against phytopathogenic Fusarium oxysporum f. sp. radicis-lycopersici (FORL) strains2021Ingår i: SN Applied Sciences, ISSN 2523-3963, E-ISSN 2523-3971, Vol. 3, nr 4, s. 506-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Fusarium species are the primary fungal pathogen affecting agricultural foodstuffs both in crop yield and economic loss. Due to these problems, control of phytopathogenic fungi has become one of the critical problems around the World. Nanotechnology is a new technology with potential in many fields, including agriculture. This study focused on determining potential effects of silver nanoparticles (AgNPs) with different nanosizes (3, 5, 8 and 10 nm) and at different concentrations (12.5–100 ppm) against phytopathogenic Fusarium oxysporum f. sp. radicis-lycopersici (FORL) strains. The maximum antifungal activity was achieved by decreasing nanosize and increasing concentration of AgNPs. Mycelium growth abilities were decreased about 50%, 75% and 90% by AgNPs treatment with 3 nm sizes at 25 ppm, 37.5 ppm and 50 ppm concentrations, respectively. The productivity of fungal biomass in the liquid growth media was found to be too limited at the 25–37.5 ppm of AgNPs concentrations with all sizes. In addition, both septation number and dimensions of micro- and macroconidia were found to be gradually decreased with the application of silver nanoparticles. This work showed that the low concentration of AgNPs could be used as potential antifungal agents and applied for control of phytopathogens.

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  • 3.
    Awasthi, Mukesh Kumar
    et al.
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
    Kumar, Vinay
    Department of Community Medicine, Saveetha Medical College, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam 602105, India.
    Hellwig, Coralie
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Wikandari, Rachma
    Harirchi, Sharareh
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Wainaina, Steven
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sindhu, Raveendran
    Binod, Parameswaran
    Zhang, Zengqiang
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Filamentous fungi for sustainable vegan food production systems within a circular economy: Present status and future prospects2023Ingår i: Food Research International, ISSN 0963-9969, E-ISSN 1873-7145, Vol. 164, artikel-id 112318Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Filamentous fungi serve as potential candidates in the production of different value-added products. In the context of food, there are several advantages of using filamentous fungi for food. Among the main advantages is that the fungal biomass used food not only meets basic nutritional requirements but that it is also rich in protein, low in fat, and free of cholesterol. This speaks to the potential of filamentous fungi in the production of food that can substitute animal-derived protein sources such as meat. Moreover, life-cycle analyses and techno-economic analyses reveal that fungal proteins perform better than animal-derived proteins in terms of land use efficiency as well as global warming. The present article provides an overview of the potential of filamentous fungi as a source of food and food supplements. The commercialization potential as well as social, legal and safety issues of fungi-based food products are discussed.

  • 4.
    Balaban, Merve
    et al.
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, 41400 Turkey.
    Koc, Cansel
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, 41400 Turkey.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, 41400 Turkey.
    Akbas, Meltem Yesilcimen
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, 41400 Turkey.
    Screening for Bioactive Compound Rich Pomegranate Peel Extracts and Their Antimicrobial Activities2022Ingår i: Johnson Matthey Technology Review, ISSN 2056-5135, Vol. 66, nr 1, s. 81-89Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this work, seven different extracts from pomegranate (Punica granatum L., cv. Hicaznar) peel were prepared by using different solvents (ethanol, methanol, either alone or in combination with acid, acetone and water). The phenolics (punicalagins and ellagic acid), organic acids (citric acid and malic acid) and sugars of pomegranate peel extracts were determined. The highest amounts of punicalagins and ellagic acid were detected by ethanol-acid extract as 13.86% and 17.19% (w/v) respectively, whereas the lowest levels were obtained with acetone and water extracts. Moreover, the methanol-acid (3.19%malic acid) and ethanol-acid (1.13% citric acid) extracts contained the highest levels of organic acids. The antimicrobial activities of extracts were investigated by agar well diffusion method. Methanol-acid and ethanol-acid extracts exhibited the highest antimicrobial effects on all tested microorganisms, giving inhibition zones ranging in size from 17 to 36 mm. Although similar antimicrobial activities were observed by ethanol, methanol, and acetone extracts (up to 24 mm), the lowest antimicrobial activities were attained by water extract (0-15 mm). All extracts were generally more effective against Gram-positive bacteria: Enterococcus facealis, Bacillus subtilis, Bacillus cereus than Gram-negative ones: Escherichia coli and Enterobacter aerogenes. It was shown that extracts from pomegranate peels represent a good source of bioactive compounds.

  • 5.
    Balaban, Merve
    et al.
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, 41400 Turkey.
    Koc, Cansel
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, 41400 Turkey.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yesilcimen Akbas, Meltem
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, 41400 Turkey.
    Antibiofilm effects of pomegranate peel extracts against B. cereusB. subtilis and E. faecalis2021Ingår i: International journal of food science & technology, ISSN 0950-5423, E-ISSN 1365-2621, Vol. 56, nr 10, s. 4915-4924, artikel-id 15221Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this study, the antibacterial and antibiofilm properties of pomegranate (Punica granatum L.) extracts (PPLs) prepared by 10g of pomegranate peels (PPL10) and 100 mL of different solvents (ethanol, methanol, and their acid combinations, and water) were investigated as sources of bioactive compounds against food related bacteria. The antimicrobial activities of the extracts were measured by using agar well diffusion assay. The acid-treated extracts exhibited the highest antimicrobial activities (31-34 mm). The biofilm formations were assessed by using a microplate reader (570 nm) after crystal violet staining. The prevention and removal of bacterial biofilms were also evaluated by using extracts prepared by 5g of initial pomegranate peel (PPL5) with the different solvents or 200 ppm chlorine solution. All PPL5 and PPL10 extracts diluted at different ratios inhibited and removed biofilms and the highest antibiofilm effects were up to 80% by acid-treated extracts. In addition, PPL5s and PPL10s were as effective as or more effective than chlorine for the prevention of biofilms. Therefore, from an economical perspective the PPL5s could represent promising candidates as natural antibiofilm agents for food industry.  

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  • 6.
    Braho, Vjola
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Cultivation of edible filamentous fungi on pomegranate by-products as feedstocks to produce mycoprotein2023Ingår i: Systems Microbiology and Biomanufacturing, ISSN 2662-7655Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Pomegranate, renowned for its delectable taste and remarkable nutritional profile, has witnessed a surge in both production and consumption. However, the by-products generated during industrial processes, such as peels and seeds, have the potential for adverse environmental impacts if not meticulously managed. Similarly, expired fruit juices or spillages that may occur during manufacturing and transportation contribute to agri-food waste. This study focused on the comprehensive assessment of pomegranate by-products and pomegranate juice using ascomycetes and zygomycetes filamentous fungi, namely Aspergillus oryzae, Rhizopus oligosporus, and Neurospora intermedia to obtain mycoprotein for sustainable vegan food production. The findings revealed that pomegranate juice, both fresh and expired commercial, contained essential nutrients for fungal biomass production (up to 0.024 g biomass/mL juice). Nonetheless, fresh juice emerges as a more potent medium in terms of protein production than commercial juice. Cultivating A. oryzae yielded a biomass of 0.39 (g biomass/g peel) from pomegranate peel, while concurrently raising the protein content of raw pomegranate peel from 30.89 g/kg to 85.41 g/kg. Furthermore, incorporating yeast extract into the peel medium not only resulted in an enhanced biomass yield of 0.49 (g biomass/g peel) but also significantly elevated the protein content to 198.63 g/kg. This study provides valuable insights into the potential of pomegranate peel and juice as promising substrate for fungal biomass production, offering opportunities for the development of innovative food and feed products. 

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  • 7. Celik, Kamile Burcu
    et al.
    Cengiz, Elif Ceylan
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Dursun, Burcu
    Ozturk, Osman
    Akbas, Meltem Yesilcimen
    Demir-Cakan, Rezan
    In-situ wrapping of tin oxide nanoparticles by bacterial cellulose derived carbon nanofibers and its application as freestanding interlayer in lithium sulfide based lithium-sulfur batteries2018Ingår i: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 530, s. 137-145Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Lithium-Sulfur (Li-S) batteries are mostly known for their high energy density and cost-effectiveness. However, their intrinsic problems hinder their implementation into the marketplace. The most pronounced problems are the parasitic reactions which occur between lithium polysulfides species and lithium metal anode, the volume expansion of sulfur (80%) at the end of discharge and the safety issues which are linked with the use of lithium metal. Herein this work, two approaches are applied to prevent these effects; one approach is the use of Li2S as cathode material, instead of starting from sulfur powder, both to circumvent the volume expansion of sulfur taking place during discharge and to enable lithium-free anodes cell assembling (i.e. Si-Li2S or Sn-Li2S cell configurations). Second approach deals with the lithium anode protection by SnO2 containing freestanding pyrolyzed bacterial cellulose interlayers located between anode and cathode electrodes. Since bacterial celluloses are formed in the presence of SnO2 nanoparticles, the resulting structure enables intimate contact between carbon and SnO2 nanoparticles. By employing Li2S cathode and freestanding interlayer concurrently, 468 mAh g−1 discharge capacity is obtained at C/10 current density over 100 cycles.

  • 8.
    Ding, Zheli
    et al.
    Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, Hainan Province 571101, China.
    Ge, Yu
    School of Tropical Crops, Yunnan Agricultural University, Pu’er, Yunnan 665000, China.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Kumar, Vinay
    Ecotoxicity and Bioconversion Laboratory, Department of Community Medicine, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai 602105, India.
    Harirchi, Sharareh
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Binod, Parameswaran
    Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India.
    Sirohi, Ranjna
    School of Health Sciences and Technology, University of Petroleum and Energy Studies, Dehradun 248001, Uttarakhand, India.
    Sindhu, Raveendran
    Department of Food Technology, TKM Institute of Technology, Kollam 691 505, Kerala, India.
    Wu, Peicong
    Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, Hainan Province 571101, China.
    Lin, Fei
    Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, Hainan Province 571101, China.
    Zhang, Zengqiang
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Awasthi, Mukesh Kumar
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
    Valorization of tropical fruits waste for production of commercial biorefinery products: A review2023Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 374, artikel-id 128793Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Tropical fruit wastes (TFW) are considered as the major source of food and nutrition in the topical countries. In the recent years, modernization of agriculture has increased the tropical fruit production. Higher fruit production led to an increasing abundance in the tropical fruit waste. In general, the tropical fruit waste has no economic value and ends up in landfill. But in recent years it was observed that the tropical fruit waste can be valorized to produce value-added products ranging from compost, phytochemicals, and food products to biofuels. The tropical fruit waste has great potential to produce useful products in tropical areas. This review literature is an endeavor to understand the major tropical fruit wastes and their composition. The review presents a detailed investigation on tropical fruit waste composition, its conversion potential, role of microbes in waste valorization, production of commercially valuable products and future perspectives in waste valorization.

  • 9. Ding, Zheli
    et al.
    Kumar, Vinay
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Harirchi, Sharareh
    Dregulo, Andrei Mikhailovich
    Sirohi, Ranjna
    Sindhu, Raveendran
    Binod, Parameswaran
    Liu, Xiaodi
    Zhang, Zengqiang
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Awasthi, Mukesh Kumar
    Agro waste as a potential carbon feedstock for poly-3-hydroxy alkanoates production: Commercialization potential and technical hurdles2022Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 364, artikel-id 128058Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The enormous production and widespread applications of non -biodegradable plastics lead to their accumulation and toxicity to animals and humans. The issue can be addressed by the development of eco-friendly strategies for the production of biopolymers by utilization of waste residues like agro residues. This will address two societal issues – waste management and the development of an eco-friendly biopolymer, poly-3-hydroxy alkanoates (PHAs). Strategies adopted for utilization of agro-residues, challenges and future perspectives are discussed in detail in this comprehensive review. The possibility of PHA properties improvements can be increased by preparation of blends.

  • 10.
    Harirchi, Sharareh
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ramezani, Mohaddaseh
    Microorganisms Bank, Iranian Biological Resource Centre (IBRC), Academic Center for Education, Culture and Research (ACECR), Tehran, Iran.
    Aliyu, Habibu
    Institute of Process Engineering in Life Science II: Technical Biology, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
    Etemadifar, Zahra
    Department of Cell and Molecular Biology & Microbiology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan 8174673441, Iran.
    Nojoumi, Seyed Ali
    Microbiology Research Center, Pasteur Institute of Iran, Tehran 1316943551, Iran; Department of Mycobacteriology and Pulmonary Research, Pasteur Institute of Iran, Tehran 1316943551, Iran.
    Yazdian, Fatemeh
    Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439957131, Iran.
    Awasthi, Mukesh Kumar
    College of Natural Resources and Environment, Northwest A&F University, Taicheng Road 3#, Yangling, Xianyang 712100, China.
    Taherzadeh, Mohammad J.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Bacillales: From Taxonomy to Biotechnological and Industrial Perspectives2022Ingår i: Microorganisms, E-ISSN 2076-2607, Vol. 10, nr 12, artikel-id 2355Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    For a long time, the genus Bacillus has been known and considered among the most applicable genera in several fields. Recent taxonomical developments resulted in the identification of more species in Bacillus-related genera, particularly in the order Bacillales (earlier heterotypic synonym: Caryophanales), with potential application for biotechnological and industrial purposes such as biofuels, bioactive agents, biopolymers, and enzymes. Therefore, a thorough understanding of the taxonomy, growth requirements and physiology, genomics, and metabolic pathways in the highly diverse bacterial order, Bacillales, will facilitate a more robust designing and sustainable production of strain lines relevant to a circular economy. This paper is focused principally on less-known genera and their potential in the order Bacillales for promising applications in the industry and addresses the taxonomical complexities of this order. Moreover, it emphasizes the biotechnological usage of some engineered strains of the order Bacillales. The elucidation of novel taxa, their metabolic pathways, and growth conditions would make it possible to drive industrial processes toward an upgraded functionality based on the microbial nature.

  • 11.
    Harirchi, Sharareh
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Wainaina, Steven
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Nojoumi, S. A.
    Pasteur Institute of Iran.
    Parchami, Mohsen
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Varjani, S.
    Gujarat Pollution Control Board.
    Khanal, S. K.
    University of Hawaii.
    Wong, J.
    Awasthi, M. K.
    Hong Kong Baptist University.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Microbiological insights into anaerobic digestion for biogas, hydrogen or volatile fatty acids (VFAs): a review2022Ingår i: Bioengineered, ISSN 2165-5979, E-ISSN 2165-5987, Vol. 13, nr 3, s. 6521-6557Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In the past decades, considerable attention has been directed toward anaerobic digestion (AD), which is an effective biological process for converting diverse organic wastes into biogas, volatile fatty acids (VFAs), biohydrogen, etc. The microbial bioprocessing takes part during AD is of substantial significance, and one of the crucial approaches for the deep and adequate understanding and manipulating it toward different products is process microbiology. Due to highly complexity of AD microbiome, it is critically important to study the involved microorganisms in AD. In recent years, in addition to traditional methods, novel molecular techniques and meta-omics approaches have been developed which provide accurate details about microbial communities involved AD. Better understanding of process microbiomes could guide us in identifying and controlling various factors in both improving the AD process and diverting metabolic pathway toward production of selective bio-products. This review covers various platforms of AD process that results in different final products from microbiological point of view. The review also highlights distinctive interactions occurring among microbial communities. Furthermore, assessment of these communities existing in the anaerobic digesters is discussed to provide more insights into their structure, dynamics, and metabolic pathways. Moreover, the important factors affecting microbial communities in each platform of AD are highlighted. Finally, the review provides some recent applications of AD for the production of novel bio-products and deals with challenges and future perspectives of AD. © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

  • 12.
    Haykir, N. I.
    et al.
    Department of Energy Systems Engineering, Ankara University, Ankara, Turkey.
    Nizan Shikh Zahari, S. M. S.
    Industrial Chemical Technology Programme, Faculty of Science and Technology, Universiti Sains Islam Malaysia, Bandar Baru Nilai, Nilai, Negeri Sembilan 71800, Malaysia; Department of Chemical Engineering, Faculty of Engineering, Imperial College London, London SW72AZ, United Kingdom.
    Harirchi, Sharareh
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Awasthi, M. K.
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Applications of ionic liquids for the biochemical transformation of lignocellulosic biomass into biofuels and biochemicals: A critical review2023Ingår i: Biochemical engineering journal, ISSN 1369-703X, E-ISSN 1873-295X, Vol. 193, artikel-id 108850Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Lignocellulosic materials are valuable resources in today's bioprocess technologies; however, their recalcitrance is a major barrier in industry regarding their conversion to microbial products. For this purpose, in this study, the synthesis of ionic liquids (ILs), its function in the hydrolysis of lignocellulosic materials, its biochemistry and possible toxic effects were investigated. In addition, the bioconversion of lignocellulosic materials pretreated with ionic liquids to biofuels (bioethanol, biobutanol, biogas and hydrogen) and various biochemicals is discussed in detail. For this, the focus is on the potential of ILs for industrial integration and use in large-scale reactors. ILs offer significant advantages due to their potential for ease of use and their features such as recovery and reuse after pretreatment. However, there are economic and technical problems that need to be solved to expand ILs in industrial systems and increase their use potential. To overcome these problems and the usability of ILs technologies in industry, techno-economic analyses has been examined and compared with traditional processes.

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  • 13. Kumar Awasthi, Mukesh
    et al.
    Paul, Anindita
    Kumar, Vinay
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Kumar, Deepak
    Sarsaiya, Surendra
    Liu, Hong
    Zhang, Zengqiang
    Binod, Parameswaran
    Sindhu, Raveendran
    Kumar, Vinod
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Recent trends and developments on integrated biochemical conversion process for valorization of dairy waste to value added bioproducts: A review2022Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 344, artikel-id 126193Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    In this review article, discuss the many ways utilized by the dairy sector to treat pollutants, emphasizing their influence on the quality and efficiency with which contamination is removed. It focuses on biotechnology possibilities for valorizing dairy waste in particular. The findings revealed that dairy waste may be treated using physicochemical, biological, and biotechnological techniques. Notably, this article highlighted the possibility of dairy waste being used as a feedstock not only for the generation of biogas, bioethanol, biohydrogen, microbial fuel cells, lactic acid, and fumaric acid via microbial technology but also for the production of biooil and biochar by pyrolysis. In addition, this article critically evaluates the many treatment techniques available for recovering energy and materials from dairy waste, their combinations, and implementation prospects. Valorization of dairy waste streams presents an opportunity to extend the dairy industry's presence in the fermented functional beverage sector.

  • 14. Kumar Awasthi, Mukesh
    et al.
    Yan, Binghua
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Gómez-García, Ricardo
    Ren, Liheng
    Sharma, Pooja
    Binod, Parameswaran
    Sindhu, Raveendran
    Kumar, Vinod
    Kumar, Deepak
    Mohamed, Badr A.
    Zhang, Zengqiang
    Taherzadeh, Mohammad J.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Organic waste recycling for carbon smart circular bioeconomy and sustainable development: A review2022Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 360, artikel-id 127620Artikel i tidskrift (Refereegranskat)
  • 15.
    Mukesh Kumar, Awasthi
    et al.
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
    Harirchi, Sharareh
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    VS, Vigneswaran
    Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Amaravati, Andhra Pradesh 522240, India.
    Rajendran, Karthik
    Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Amaravati, Andhra Pradesh 522240, India.
    Gómez-García, Ricardo
    Universidade Católica Portuguesa, CBQF – Centro de Biotecnologia e Química Fina – Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal.
    Hellwig, Coralie
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery.
    Binod, Parameswaran
    Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India.
    Sindhu, Raveendran
    Department of Food Technology, TKM Institute of Technology, Kollam 691 505, Kerala, India.
    Madhavan, Aravind
    Rajiv Gandhi Centre for Biotechnology, Jagathy, Thiruvananthapuram 695 014, Kerala, India.
    Kumar, A.N. Anoop
    Centre for Research in Emerging Tropical Diseases (CRET-D), Department of Zoology, University of Calicut, Malappuram 673635, Kerala, India.
    Kumar, Vinod
    School of Water, Energy and Environment, Cranfield University, Cranfield MK43 0AL, UK.
    Kumar, Deepak
    Department of Chemical Engineering, SUNY College of Environmental Science and Forestry, 402 Walters Hall, 1 Forestry Drive, Syracuse, NY 13210, USA.
    Zhang, Zengqiang
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Myco-biorefinery approaches for food waste valorization: Present status and future prospects2022Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 360, artikel-id 127592Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Increases in population and urbanization leads to generation of a large amount of food waste (FW) and its effective waste management is a major concern. But putrescible nature and high moisture content is a major limiting factor for cost effective FW valorization. Bioconversion of FW for the production of value added products is an eco-friendly and economically viable strategy for addressing these issues. Targeting on production of multiple products will solve these issues to greater extent. This article provides an overview of bioconversion of FW to different value added products.

  • 16.
    Mukesh Kumar, Awasthi
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Gowd, S. C.
    Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Amaravati, Andhra Pradesh 522240, India.
    Rajendran, K.
    Department of Environmental Science and Engineering, School of Engineering and Sciences, SRM University-AP, Amaravati, Andhra Pradesh 522240, India.
    Kumar, V.
    Ecotoxicity and Bioconversion Laboratory, Department of Community Medicine, Saveetha Medical College & Hospital, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha Nagar, Thandalam, Chennai 602105, India.
    Sarsaiya, S.
    Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.
    Li, Y.
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
    Sindhu, R.
    Department of Food Technology, TKM Institute of Technology, Kollam 691505, Kerala, India.
    Binod, P.
    Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Trivandrum 695 019, Kerala, India.
    Zhang, Z.
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, China.
    Pandey, A.
    Centre for Innovation and Translational Research, CSIR-Indian Institute of Toxicology Research, Lucknow 226 001, India; Sustainability Cluster, School of Engineering, University of Petroleum and Energy Studies, Dehradun 248 007, Uttarakhand, India; Centre for Energy and Environmental Sustainability, Lucknow 226 029, Uttar Pradesh, India.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    A comprehensive review on thermochemical, and biochemical conversion methods of lignocellulosic biomass into valuable end product2023Ingår i: Fuel, ISSN 0016-2361, E-ISSN 1873-7153, Vol. 342, artikel-id 127790Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Lignocellulosic wastes have emerged as a potential feedstock in the last decades. There are multiple reasons for its abundance, easy availability, economic, and abundant sources. It can be used to produce several value-added products. Among them, fuel is considered one of the important requirements. Production of fuel from lignocellulosic biomass is a tricky business. The major reason for its failure is the low product yield. Therefore, high yield and low-cost are the two key parameters which need significant optimization. To achieve the target several newer technologies such as pyrolysis, hydrothermal liquefaction and gasification have emerged. These techniques are much more efficient than that of conventional acid or alkali. At the same time quality of the product is also improved. The focus of this review is to analyze the efficiency of chemical conversion of lignocellulosic residues into valuable fuels keeping in mind the cost-reduction strategies. 

  • 17.
    Nazir, Muhammad Tahir
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Mahboubi, Amir
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ferreira, Jorge
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery University of Borås Borås Sweden.
    Production of filamentous fungal biomass with increased oil content using olive oil as a carbon source2022Ingår i: Journal of chemical technology and biotechnology (1986), ISSN 0268-2575, E-ISSN 1097-4660Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    BACKGROUND

    Vegetable oil is more difficult for microorganisms to degrade compared with carbohydrates and protein. Oil-rich waste creates serious environmental and health concerns if it remains untreated. The aim of the work reported here was to evaluate the effects on the nutritional composition of filamentous fungal biomass by growing it in pure olive oil as a carbon source.

    RESULTS

    The growth of different filamentous fungal strains (Aspergillus oryzae, Neurospora intermedia and Rhizopus oryzae) was investigated in pure olive oil. A pre-germination stage of either glucose or yeast extract was necessary for successful fungal growth in olive oil. A. oryzae showed superior performance in comparison with N. intermedia and R. oryzae in terms of biomass growth. The obtained biomass from A. oryzae and N. intermedia was analyzed for protein, fat, ash and alkali-insoluble material, where the presence of olive oil had a steering effect on biomass growth (16 g L−1 with oil versus 4 g L−1 without oil). Nutritional composition of the fungal biomass of A. oryzae contained 0.33% fat and 48% protein when cultivated in medium without olive oil supplementation, while 31% fat and 14% protein contents were observed in the presence of olive oil-containing medium. Similar trends for fat and protein contents were observed for the biomass of N. intermedia. Moreover, microscopy confirmed the presence of oil globules inside the fungal cells.

    CONCLUSIONS

    Fat composition of fungal biomass can be steered through addition of olive oil, which increases the versatility of the produced biomass for various applications, namely in feed, food and biofuel production.

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  • 18. Qin, Shiyi
    et al.
    Giri, Balendu Shekher
    Patel, Anil Kumar
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Liu, Huimin
    Chen, Hongyu
    Juneja, Ankita
    Kumar, Deepak
    Zhang, Zengqiang
    Mukesh Kumar, Awasthi
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Resource recovery and biorefinery potential of apple orchard waste in the circular bioeconomy2021Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, artikel-id 124496Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this review investigate the apple orchard waste (AOW) is potential organic resources to produce multi-product and there sustainable interventions with biorefineries approaches to assesses the apple farm industrial bioeconomy. The thermochemical and biological processes like anaerobic digestion, composting and , etc., that generate distinctive products like bio-chemicals, biofuels, biofertilizers, animal feed and biomaterial, etc can be employed for AOW valorization. Integrating these processes can enhanced the yield and resource recovery sustainably. Thus, employing biorefinery approaches with allied different methods can link to the progression of circular bioeconomy. This review article mainly focused on the different biological processes and thermochemical that can be occupied for the production of waste to-energy and multi-bio-product in a series of reaction based on sustainability. Therefore, the biorefinery for AOW move towards identification of the serious of the reaction with each individual thermochemical and biological processes for the conversion of one-dimensional providences to circular bioeconomy.

  • 19.
    Rousta, Neda
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden.
    Aslan, Melissa
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden;Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Yesilcimen Akbas, Meltem
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Ozcan, Ferruh
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery, University of Borås, Borås, Sweden.
    Effects of fungal based bioactive compounds on human health: Review paper2023Ingår i: Critical reviews in food science and nutrition, ISSN 1040-8398, E-ISSN 1549-7852, s. 1-24Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Since the first years of history, microbial fermentation products such as bread, wine, yogurt and vinegar have always been noteworthy regarding their nutritional and health effects. Similarly, mushrooms have been a valuable food product in point of both nutrition and medicine due to their rich chemical components. Alternatively, filamentous fungi, which can be easier to produce, play an active role in the synthesis of some bioactive compounds, which are also important for health, as well as being rich in protein content. Therefore, this review presents some important bioactive compounds (bioactive peptides, chitin/chitosan, β-glucan, gamma-aminobutyric acid, L-carnitine, ergosterol and fructooligosaccharides) synthesized by fungal strains and their health benefits. In addition, potential probiotic- and prebiotic fungi were researched to determine their effects on gut microbiota. The current uses of fungal based bioactive compounds for cancer treatment were also discussed. The use of fungal strains in the food industry, especially to develop innovative food production, has been seen as promising microorganisms in obtaining healthy and nutritious food.

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  • 20.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Department of Molecular Biology and Genetics, Gebze Technical University, Kocaeli 41400, Türkiye.
    Akbas, Meltem Yesilcimen
    Department of Molecular Biology and Genetics, Gebze Technical University, Kocaeli 41400, Türkiye.
    Antimicrobial Activities of Olive Oil Mill Wastewater Extracts against Selected Microorganisms2023Ingår i: Sustainability, E-ISSN 2071-1050, Vol. 15, nr 10, artikel-id 8179Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Discovering eco-friendly alternatives to synthetic chemicals has become an increasingly popular area of research. Natural products are now in the spotlight for their potential use as replacements for synthetic chemicals. To maximize the benefits of these natural products, it is important to use efficient extraction methods, especially from agroindustrial waste. Olive oil mill wastewater (OOMW) is a byproduct of the olive oil production process and is considered a pollutant; however, OOMW contains a wide range of phenolic compounds that have proven antimicrobial properties. This study investigates the extraction of these compounds from OOMW, with the aim of determining their potential antimicrobial activities against several bacterial strains and fungi, including Bacillus spizizenii, Bacillus cereus, Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Klebsiella aerogenes, Streptococcus uberis, Enterococcus faecalis, and Candida albicans. The OOMW extracts (OEs) were prepared by using three different solvents: ethyl acetate, ethanol, and methanol. The highest total phenolic contents (4.03 g, GAE/L) and the strongest antibacterial activity were obtained with methanol extraction. All OEs showed no antifungal activity against C. albicans. OEs, particularly methanol extracts of OOMW, can be used as bioactive substances in various industries as nutraceuticals and food ingredients, respectively.

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  • 21.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Akbas, Meltem Yesilcimen
    Biorecovering of phenolic-rich compounds from food industry wastes2022Konferensbidrag (Refereegranskat)
    Abstract [en]

    In food industry, abundant fruit/vegetable byproducts (peel, seed, etc.) have been generated and released into the environment. These wastes can be considered as a largely available, low-cost source of value-added compounds. Among these, phenolic compounds are well-known for their beneficial effects on human health. Effective extraction methodologies are required for recovery of these phenolic compounds from agri-food wastes. These extracts can be used used as natural antimicrobials in pharmacology or disinfectants in food processing plants. In this work, pomegranate peel extracts were prepared by using different solvents to obtain high amount of phenolic-rich compounds. The pomegranate peel extracts were also tested against some important food pathogens to determine their antimicrobial and antibiofilm activities. Pomegranate peel extracts having high amount of phenolic compounds had higher antimicrobial and antibiofilm activities. As a result, phenolic-rich bioactive compounds can be recovered from food industry wastes and used as natural antimicrobial and antibiofilm agents. Thus, food industry wastes, especially fruit wastes, can be integrated into the extraction process and use in food, pharmacology, cosmetic and medicine industries. 

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  • 22.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Akbas, Meltem Yesilcimen
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Integration of bioactive compounds rich pomegranate wastes into biorefinery2022Konferensbidrag (Refereegranskat)
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  • 23.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Akbas, Meltem Yesilcimen
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Integration of olive oil industry wastewaters into biorefinery2023Konferensbidrag (Refereegranskat)
    Abstract [en]

    While olive oil is an important food product in the Mediterranean Sea Basin, olive oil mill wastewater (OOMW) and olive pomace, which are by-products of olive oil, are released in excessive quantities. OMWW is an important source of environmental pollutants due to its slightly acidic pH, high phenol content and high chemical oxygen demand (COD). To overcome this problem, it was aimed to investigate the potential use of OOMW as an alternative substrate for protein rich biomass and bacterial cellulose production by filamentous fungi and acetic acid bacterium, respectively, in this study. Additionally, extracts of OOMW against selected microorganisms were examined to determine their use for industrial applications. The finding results indicated that OOMW needs nitrogen supplementation for microbial production processes. On the other hand, extracts of OOMW showed significant antibacterial activities with high phenolic contents. Overall, OOMW can be integrated into biorefinery with both microbial production and extraction processes and the resulting products will contribute to the food and cosmetic industries. 

  • 24.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Arifa, VIna Hasna
    Universitas Gadjah Mada.
    Hilmy, Muhammad Raihan
    Universitas Gadjah Mada.
    Ferreira, Jorge
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Wikandari, Rachma
    Universitas Gadjah Mada.
    Millati, Ria
    Universitas Gadjah Mada.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Organosolv pretreatment of oat husk using oxalic acid as an alternative organic acid and its potential applications in biorefinery2022Ingår i: Biomass Conversion and Biorefinery, ISSN 2190-6815, E-ISSN 2190-6823Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this study, ethanol organosolv treatment of oat husk and the potential effects of phosphoric acid and oxalic acid as alternatives to sulfuric acid were investigated. These acids were determined as effective as sulfuric acid to obtain high quality lignin and glucan and they can be used instead of sulfuric acid in solvent acidification. To determine the purity and recovery of both lignin and glucan, the effects of initial substrate amount, solid-to-liquid ratio, and amount of washing solutions were also examined using a one-factor-at-a-time strategy. Reducing the amount of washing solutions (water, solvent, or both) negatively affected lignin recovery, but it did not affect glucan recovery. The optimum conditions for pretreatment of the oat husk at higher glucan recovery were obtained with 50% aqueous ethanol acidified with oxalic acid at 210 degrees C for 90 min and solid-to-liquid ratio of 1:2. In the mixture of evaporated glucan-rich and hemicellulose-rich fractions obtained through the optimized condition, 4.62 g/L biomass containing 10.27% protein was produced by the cultivation of Aspergillus oryzae. The fractions obtained from organosolv treatment can be used to obtain value-added products such as biomass production, and thus contributing to a sustainable economy by integrating lignocellulosic substrate residues into the biorefinery.

  • 25.
    Sar, Taner
    et al.
    İstanbul Üniversitesi, Istanbul, Turkiye.
    AVCI, Sedat
    İstanbul Üniversitesi, Istanbul, Turkiye.
    AVCI, Meral
    İstanbul Üniversitesi, Istanbul, Turkiye.
    Evaluation of the Vegetation Period According to Climate Change Scenarios: A Case Study in the Inner West Anatolia Subregion of Turkey*2019Ingår i: Journal of Geography, ISSN 1302-7212, s. 29-39Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this research, 15 meteorological stations located in western Anatolia in Turkey were investigated for determining temperature properties. The vegetation season has been determined according to days when the daily temperature was greater than or equal to 8°C. The research area has 3 different vegetation durations as longer (more than 225 days in the western and southern parts), moderate (210-220 days in plateaus around Uşak, Gediz and Demirci), and shorter (180-195 days in the eastern part and less than 180 days in mountainous areas). Then, the vegetation has been reinvestigated according to climate change scenarios (RCP 4.5 and 8.5). For this purpose, the daily mean temperatures were raised by 2.6°C and 4.8°C for RCP 4.5 and RCP 8.5, respectively. In the reinvestigation period, the vegetation period will increase about 15-20 days or over 40 days according to RCP 4.5 and 8.5, respectively. Along with the increase in temperature throughout the research area, growing seasons will be significantly affected, beginning and ending dates of vegetation would shift. Owing to climate change effects, mountainous areas may be affected more than low-altitude areas. As a conclusion due to the result of increasing temperature, plant development and distribution will be affected, and new plant species may occur

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  • 26.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Chen, Yang
    Bai, Yu
    Liu, Benjamin
    Agarwal, Pooja
    Stark, Benjamin C.
    Akbas, Meltem Yesilcimen
    Combining co-culturing of Paenibacillus strains and Vitreoscilla hemoglobin expression as a strategy to improve biodesulfurization2021Ingår i: Letters in Applied Microbiology, ISSN 0266-8254, E-ISSN 1472-765X, Vol. 72, nr 4, s. 484-494Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Enhancement of the desulfurization activities of Paenibacillus strains 32O-W and 32O-Y were investigated using dibenzothiophene (DBT) and DBT sulfone (DBTS) as sources of sulphur in growth experiments. Strains 32O-W, 32O-Y and their co-culture (32O-W plus 32O-Y), and Vitreoscilla hemoglobin (VHb) expressing recombinant strain 32O-Yvgb and its co-culture with strain 32O-W were grown at varying concentrations (0.1–2 mmol l-1) of DBT or DBTS for 96 h, and desulfurization measured by production of 2-hydroxybiphenyl (2-HBP) and disappearance of DBT or DBTS. Of the four cultures grown with DBT as sulphur source, the best growth occurred for the 32O-Yvgb plus 32OW co-culture at 0.1 and 0.5 mmol l-1 DBT. Although the presence of vgb provided no consistent advantage regarding growth on DBTS, strain 32O-W, as predicted by previous work, was shown to contain a partial 4S desulfurization pathway allowing it to metabolize this 4S pathway intermediate.

  • 27.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ferreira, Jorge
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    A study on the use of olive oil mill wastewater to produce protein-rich fungal biomass2024Konferensbidrag (Refereegranskat)
    Abstract [en]

    While olive oil is an important food product in the Mediterranean Sea Basin, olive oil mill wastewater (OOMW) and olive pomace, which are by-products of olive oil, are released in excessive quantities. OMWW is an important source of environmental pollutants due to its slightly acidic pH, high contents of phenol and chemical oxygen demand (COD). To overcome this problem, it was aimed to investigate the potential use of OOMW as an alternative substrate for biomass production by filamentous fungi in this study. For the cultivation, three edible fungi (Aspergillus oryzae CBS 819.72, Neurospora intermedia CBS 131.92, and Rhizopus delemar CBS 145940) were tested. Among them, A. oryzae was found to be a promising fungus in biomass production containing 14.9% protein. The protein content of the biomass was improved to 44.9% (w/w) by adding a nitrogen source (sodium nitrate) and removing the suspended solids. Concomitantly, 35-44% of COD reduction was also obtained after the fungal cultivation. Thus, the potential use of olive oil mill wastewater for the cultivation of fungal biomass was determined and at the same time, its pre-treatment was provided. However, the content of the obtained fungal biomass should be determined and its usability as feed should be investigated.

  • 28.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ferreira, Jorge
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Bioprocessing strategies to increase the protein fraction of Rhizopus oryzae biomass using fish industry sidestreams2020Ingår i: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 113, s. 261-269Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The sidestreams produced during fish processing end in a separation tank where the resulting fractions follow biogas production or wastewater treatment. These streams can alternatively be used for production of protein-rich fungal biomass for e.g. fish feed applications, a product in increasing demand. These streams and upper streams originated during fish processing were used in this study for production of biomass using the edible filamentous fungus Rhizopus oryzae. The COD of the streams varied between 11 and 54 kg/m3 and, after fungal conversion of organic matter into protein-rich biomass and separation, a reduction of 34–69% was achieved. The stream origin had an effect on the final production and composition of the fungal biomass: 480 kg of biomass containing 33% protein per ton of COD were produced after cultivation in the separation tank streams, while 220 kg of biomass containing 62% protein per ton of COD were produced in upper sidestreams with lower amounts of suspended solids. Changing the initial pH (6.1–6.5) to 5.0 had a negative influence on the amount of biomass produced while medium supplementation had no influence. Thus, fish processing sidestreams can be diverted from biogas production and wastewater treatment to the production of protein-rich biomass for feed applications. 

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  • 29.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ferreira, Jorge
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås.
    Conversion of fish processing wastewater into fish feed ingredients through submerged cultivation of Aspergillus oryzae2020Ingår i: Systems Microbiology and Biomanufacturing, Vol. 1, nr 1, s. Online-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Fish processing towards production of fillet gives rise to wastewater streams that are ultimately directed to biogas production

    and/or wastewater treatment. However, these wastewater streams are rich in minerals, fat, and proteins that can be converted to

    protein-rich feed ingredients through submerged cultivation of edible filamentous fungi. In this study, the origin of wastewater

    stream, initial pH, cultivation time, and extent of washing during sieving, were found to influence the amount of recovered

    material from the wastewater streams and its protein content, following cultivation with Aspergillus oryzae. Through cultivation

    of the filamentous fungus in sludge, 330 kg of material per ton of COD were recovered by sieving, corresponding to

    121 kg protein per ton of COD, while through its cultivation in salt brine, 210 kg of material were recovered per ton of COD,

    corresponding to 128 kg protein per ton of COD. Removal ranges of 12–43%, 39–92%, and 32–66% for COD, total solids, and

    nitrogen, respectively, were obtained after A. oryzae growth and harvesting in the wastewater streams. Therefore, the present

    study shows the versatility that the integration of fungal cultivation provides to fish processing industries, and should be

    complemented by economic, environmental, and feeding studies, in order to reveal the most promising valorization strategy.

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  • 30.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ferreira, Jorge
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Evaluation of fish industry byproducts for protein-rich fungal biomass production2021Konferensbidrag (Refereegranskat)
    Abstract [en]

    In connection with the increasing population in the world, the food industry has been developing rapidly and the industrial by-products have become an important problem. Fish industry byproducts are rich in minerals, nitrogen, and fat, and can contribute to environmental pollution if not properly treated. These byproducts are generally evaluated for biogas production and/or follow wastewater treatment. The byproducts can alternatively be utilized for the cultivation of microorganisms and converted to value-added products. For this purpose, two edible filamentous fungi, namely Aspergillus oryzae and Rhizopus oryzae were used to evaluate the production of protein-rich fungal biomass from fish processing byproducts. The amount of fungal biomass and its protein content (35-65%) varied according to the origin of the byproduct within the fish filleting process. Along with the fungal growth and production of a protein-rich product, nitrogen and COD removal of 32–72% and 12–58%, respectively, were achieved. Altogether, cultivation of filamentous fungi can aid to divert fish processing byproducts from biogas production towards production of protein-rich products for animal feed and concomitantly ease wastewater treatment.

  • 31.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Harirchi, Sharareh
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ramezani, M
    Microorganisms Bank, Iranian Biological Resource Centre (IBRC), ACECR, Tehran, Iran.
    Bulkan, Gülru
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Akbas, M Y
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli 41400, Turkey.
    Pandey, A
    CSIR-Indian Institute of Toxicology Research, Lucknow, India.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Potential utilization of dairy industries by-products and wastes through microbial processes: A critical review2022Ingår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 810Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    The dairy industry generates excessive amounts of waste and by-products while it gives a wide range of dairy products. Alternative biotechnological uses of these wastes need to be determined to aerobic and anaerobic treatment systems due to their high chemical oxygen demand (COD) levels and rich nutrient (lactose, protein and fat) contents. This work presents a critical review on the fermentation-engineering aspects based on defining the effective use of dairy effluents in the production of various microbial products such as biofuel, enzyme, organic acid, polymer, biomass production, etc. In addition to microbial processes, techno-economic analyses to the integration of some microbial products into the biorefinery and feasibility of the related processes have been presented. Overall, the inclusion of dairy wastes into the designed microbial processes seems also promising for commercial approaches. Especially the digestion of dairy wastes with cow manure and/or different substrates will provide a positive net present value (NPV) and a payback period (PBP) less than 10 years to the plant in terms of biogas production.

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  • 32.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
    Kiraz, Pelin
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli 41400, Türkiye.
    Braho, Vjola
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
    Harirchi, Sharareh
    Swedish Centre for Resource Recovery, University of Borås, 50190 Borås, Sweden.
    Akbas, Meltem Yesilcimen
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli 41400, Türkiye.
    Novel Perspectives on Food-Based Natural Antimicrobials: A Review of Recent Findings Published since 20202023Ingår i: Microorganisms, E-ISSN 2076-2607, Vol. 11, nr 9, artikel-id 2234Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Various fruit and vegetable wastes, particularly peels, seeds, pulp, and unprocessed residues from the food industry, are abundant sources of antioxidants and essential antimicrobial agents. These valuable bioactive compounds recovered from the food industry have a great application in food, agriculture, medicine, and pharmacology. Food-derived natural antimicrobials offer advantages such as diminishing microbial loads and prolonging the shelf life of food products particularly prone to microbial spoilage. They not only enrich the foods with antioxidants but also help prevent microbial contamination, thereby prolonging their shelf life. Similarly, incorporating these natural antimicrobials into food packaging products extends the shelf life of meat products. Moreover, in agricultural practices, these natural antimicrobials act as eco-friendly pesticides, eliminating phytopathogenic microbes responsible for causing plant diseases. In medicine and pharmacology, they are being explored as potential therapeutic agents. This review article is based on current studies conducted in the last four years, evaluating the effectiveness of food-based natural antimicrobials in food, agriculture, medicine, and pharmacology.

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  • 33.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Larsson, Karin
    Chalmers Univ Technol, Food & Nutr Sci, Biol & Biol Engn, S-41296 Gothenburg, Sweden.
    Fristedt, Rikard
    Chalmers Univ Technol, Food & Nutr Sci, Biol & Biol Engn, S-41296 Gothenburg, Sweden.
    Undeland, Ingrid
    Chalmers Univ Technol, Food & Nutr Sci, Biol & Biol Engn, S-41296 Gothenburg, Sweden.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Demo-scale production of protein-rich fungal biomass from potato protein liquor for use as innovative food and feed products2022Ingår i: Food Bioscience, ISSN 2212-4292, E-ISSN 2212-4306, Vol. 47Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Innovative food and feed products have recently attracted the attention of both producers and consumers. Filamentous fungi are important biomass producers with their high protein contents. In this study, fungal biomass production from edible potato protein liquor (PPL), generated during starch production processes, was investigated through different fungal strains (Rhizopus oryzae, R. oligosporus, R. delemar, Aspergillus oryzae and Neurospora intermedia). The effects of PPL concentration, incubation time, initial pH, and cultivation conditions (in shake flaks and different scale reactors) were examined to determine the amount of biomass and its crude protein level. It was determined that the fungal biomass produced by R. delemar in industrial scale contained 53% crude protein. For this strain, the amino acid and fatty acid profiles as well as metals (iron, manganese, copper, and zinc) of the produced biomass were also investigated to assess possible use as a food or feed source. The R. delemar fungal biomass can be a promising raw material for feed and food production, for example, considering its protein and fatty acid profiles with 41% essential amino acids and 33% polyunsaturated fatty acids.

  • 34.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ozturk, Murat
    Gebze Technical University.
    Akbas, Meltem Yesilcimen
    Gebze Technical University.
    Investigation of growth properties of Paenibacillus strains in the presence of 2-HBP2021Konferensbidrag (Refereegranskat)
    Abstract [en]

    Crude oil and fossil fuels contain sulphur compounds. Consumption of these compounds could cause acid rain and environmental pollution. Dibenzothiophene (DBT) is considered as model compound for investigation of fossil fuel desulphurization. This compound is converted to 2-HBP following bio-desulphurization (BDS) by 4S pathway. This work aimed to investigate bacterial growth properties in the presence of 2-HBP which is a final product of DBT desulphurization. For this, two Paenibacillus strains (32 O-W and 32 O-Y) were incubated in 2-HBP (to give the final concentrations at 0.05, 0.1, and 0.2 mM) containing growth media. Although the OD600 value of the 32 O-W strain was low at all 2-HBP concentrations, the 32 O-Y strain could survive, and its OD levels were 3–4 fold higher than 32 O-W strain. As a result, it can be interpreted that the final products of DBT metabolism did not too toxic, and thus bio-desulfurization can be successfully completed by Paenibacillus strains. Acknowledgments: This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK, 118Y416).

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  • 35.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. University of Borås Borås Sweden;Department of Molecular Biology and Genetics Gebze Technical University Gebze‐Kocaeli Turkey.
    Ozturk, Murat
    Department of Molecular Biology and Genetics Gebze Technical University Gebze‐Kocaeli Turkey.
    Stark, Benjamin C.
    Department of Biology Illinois Institute of Technology Chicago Illinois USA.
    Akbas, Meltem Yesilcimen
    Department of Molecular Biology and Genetics Gebze Technical University Gebze‐Kocaeli Turkey.
    Improvement in desulfurization of dibenzothiophene and dibenzothiophene sulfone by Paenibacillus strains using immobilization or nanoparticle coating2022Ingår i: Journal of Applied Microbiology, ISSN 1364-5072, E-ISSN 1365-2672, Vol. 133, nr 2, s. 1040-1051Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Aims

    Biodesulfurization of fossil fuels is a promising technology for deep desulfurization. Previously, we have shown that Paenibacillus strains 32O-W and 32O-Y can desulfurize dibenzothiophene (DBT) and DBT sulfone (DBTS) effectively. In this work, improvements in DBT and DBTS desulfurization by these strains were investigated through immobilization and nanoparticle coating of cells.

    Methods and Results

    Paenibacillus strains 32O-W and 32O-Y immobilized in alginate gel beads or coated with Fe3O4 magnetite nanoparticles were grown at various concentrations (0.1–2 mmol l−1) of DBT or DBTS for 96 h. The production of 2-hydroxybiphenyl (2-HBP) from the 4S pathway biotransformation of DBT or DBTS was measured. The highest amounts of 2-HBP production occurred at concentrations of 0.1 and 0.5 mmol l−1. Compared to planktonic cultures maximum 2-HBP production increased by 54% for DBT and 90% for DBTS desulfurization with immobilized strains, and 44% for DBT and 66% for DBTS desulfurization by nanoparticle-coated strains.

    Conclusions

    Nanoparticle-coated and immobilized cells may be of use in efforts to increase the efficiency of biodesulfurization.

    Significance and Impact of the Study

    Alginate immobilization or nanoparticle coating of bacterial cells may be useful approaches for the enhancement of biodesulfurization for eventual use on an industrial scale.

  • 36.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery.
    Ozturk, Murat
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli 41400, Turkey.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ferreira, Jorge
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    New Insights on Protein Recovery from Olive Oil Mill Wastewater through Bioconversion with Edible Filamentous Fungi2020Ingår i: Processes, ISSN 2227-9717, Vol. 8, nr 10, s. 1210-Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Olive oil mills represent an important sector in the Mediterranean Sea Basin but also an environmental hazard due to untreated wastewater. Recovery of nutrients from olive oil mill wastewater(OMWW)as protein-rich microbial biomass can produce novel feed and reduce its chemical oxygen demand; however, low-protein containing products have been reported. New strategies leading to higher protein-containing fungal biomass could renew the research interest on bioconversion for pollution mitigation of OMWW. In this work, through cultivation of edible filamentous fungi(Aspergillus oryzae, Neurospora intermedia, and Rhizopus delemar), a link between the protein content inthe originated fungal biomass, and the addition of nitrogen and medium dilution was established. Addition of nitrogen in the form of NaNO3 reduced the cultivation time from 96 h to 48 h while achieving a similar biomass mass concentration of 8.43 g/L and increased biomass protein content, from w = 15.9% to w = 29.5%. Nitrogen addition and dilution of OMWW, and consequent reduction of suspended solids, led to an increase in the protein content to up to w = 44.9%. To the best of our knowledge, the protein contents achieved are the highest reported to date and can open new research avenues towards bioconversion of OMWW using edible filamentous fungi.

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  • 37.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Rousta, Neda
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Mahboubi, Amir
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Media preparation and sterilization in bioprocesses2022Ingår i: Advances in Bioprocess Engineering, Elsevier , 2022, s. 399-430Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    Fermentation and bioprocesses in which various metabolites from food to pharmaceutics are produced are constantly evolving. This section is devoted to contamination risks and their eliminations, media preparation, decontamination, and sterilization methods for such processes. For contamination, sources of microbial contaminations and decontamination (physical and chemical) practices are discussed. In addition, sterilization methods (heat, filtration, chemical, and radiation) that are applied for the removal of microorganisms from small-scale to large-scale instruments, gases, and liquids are explained. In the preparation of the media, the batching area, developed equipment, and methods for large-scale reactors are mentioned. In summary, the preparation and sterilization of the media in bioprocesses from laboratory-scale reactors to industrial-scale reactors are evaluated.

  • 38.
    Sar, Taner
    et al.
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Seker, Gamze
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Erman, Ayse Gokce
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Stark, Benjamin C.
    Biology Department, Illinois Institute of Technology, Chicago, IL, USA.
    Yesilcimen Akbas, Meltem
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey;Institute of Biotechnology, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Repeated batch fermentation of immobilized E. coli expressing Vitreoscilla hemoglobin for long-term use2017Ingår i: Bioengineered, ISSN 2165-5979, E-ISSN 2165-5987, Vol. 8, nr 5, s. 651-660Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study describes an efficient and reusable process for ethanol production from medium containing whey powder, using alginate immobilized ethanologenic E. coli strains either expressing (TS3) or not expressing (FBR5) Vitreoscilla hemoglobin. Reuseabilities of the FBR5 and TS3 strains were investigated regarding their ethanol production capacities over the course of 15 successive 96-h batch fermentations. The ethanol production was fairly stable over the entire duration of the experiment, with strain TS3 maintaining a substantial advantage over strain FBR5. Storage of both strains in 2 different solutions for up to 60 d resulted in only a modest loss of ethanol production, with strain TS3 consistently outperforming strain FBR5 by a substantial amount. Strains stored for 15 or 30 d maintained their abilities to produce ethanol without dimunition over the course of 8 successive batch fermentations; again strain TS3 maintained a substantial advantage over strain FBR5 throughout the entire experiment. Thus, immobilization is a useful strategy to maintain the advantage in ethanol productivity afforded by expression of Vitreoscilla hemoglobin over long periods of time and large numbers of repeated batch fermentations, including, as in this case, using media with food processing wastes as the carbon source. 

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  • 39.
    Sar, Taner
    et al.
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Stark, Benjamin C.
    Department of Biology, Illinois Institute of Technology, Chicago, IL, USA.
    Akbas, Meltem Yesilcimen
    Department of Molecular Biology and Genetics, Gebze Technical University, Gebze-Kocaeli, Turkey.
    Bioethanol production from whey powder by immobilized E. coli expressing Vitreoscilla hemoglobin: optimization of sugar concentration and inoculum size2021Ingår i: Biofuels, ISSN 1759-7269, E-ISSN 1759-7277, Vol. 12, nr 9, s. 1103-1108Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A combined Vitreoscilla hemoglobin/immobilization system was evaluated for ethanol production using whey powder as a carbon source and ethanologenic E. coli strain FBR5 and its Vitreoscilla hemoglobin (VHb) expressing derivative strain, TS3. The effects of varying the inoculation concentration (5, 10, 20 or 30%) of alginate beads containing cells of either strain, and the lactose levels (8–15%) of whey powder media (WP8-WP15), were studied. Ethanol production was enhanced in strain TS3 compared to strain FBR5 for all combinations of inoculation size and medium lactose concentration. This enhancement increased from 41% to 83% with an 8–15% increase in lactose concentration. The maximum amount of ethanol, 4.64% (v/v) with 99% fermentation efficiency, was produced after growth for 72 h by immobilized strain TS3, using 10% bead inoculation and medium containing 8% lactose. 

  • 40.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Organosolv pretreatment of oat husk to produce fungal biomass production2022Konferensbidrag (Refereegranskat)
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  • 41.
    Sar, Taner
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Yesilcimen Akbas, Meltem
    Gebze Technical University.
    Potential use of olive oil mill wastewater for bacterial cellulose production2022Ingår i: Bioengineered, ISSN 2165-5979, E-ISSN 2165-5987, Vol. 13, nr 3, s. 7659-7669Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    In this study, olive oil mill wastewater (OOMW), an important waste in the Mediterranean basin, was evaluated to produce bacterial cellulose (BC). For this purpose, the effects of different ratios of OOMW fractions (25-100%) and some additional nutrients (yeast extract, peptone and Hestrin-Schramm medium (HS) components) on BC productions were investigated. Unsupplemented OOMW medium (75% and 100%) yielded as much as BC obtained in HS medium (0.65 g/L), while enrichment of OOMW medium (%100) with yeast extract (5 g/L) and peptone (5 g/L) increased the amount of BC by 5.5 times, reaching to 5.33 g/L. In addition, produced BCs were characterized by FT-IR, TGA, XRD and SEM analyses. BC from OOMW medium (100% OOMW with supplementation) has a high thermal decomposition temperature (316.8°C), whereas it has lower crystallinity index (57%). According to the FT-IR analysis, it was observed that the components of OOMW might be absorbed by BCs. Thus, higher yield productions of BCs from OOMW media compared to BC obtained from HS medium indicate that olive oil industry wastes can be integrated into BC production for industrial applications.

  • 42.
    Unlu, Aise
    et al.
    Department of Chemistry; Gebze Technical University; Gebze-Kocaeli 41400 Turkey.
    Sar, Taner
    Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey.
    Seker, Gamze
    Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey.
    Erman, Ayse Gokce
    Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey.
    Kalpar, Elif
    Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey.
    Akbas, Meltem Yesilcimen
    Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey;Institute of Biotechnology; Gebze Technical University; Gebze-Kocaeli 41400 Turkey.
    Biofilm formation by Staphylococcus aureus strains and their control by selected phytochemicals2018Ingår i: International Journal of Dairy Technology, ISSN 1364-727X, E-ISSN 1471-0307, Vol. 71, nr 3, s. 637-646Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Biofilm formation by 30 Staphylococcus aureus dairy isolates and their control by phytochemicals were investigated. The majority of strains were biofilm positive by phenotypic analysis. The nuc and icaA genes were present in 30 and 27 strains, respectively. In addition, 13 strains were positive for all nuc, clfA, fnbA and icaA genes. The antimicrobial and antibiofilm activities of citral, cinnamaldehyde, eugenol, farnesol, limonene and terpinen-4-ol were also evaluated for seven strains. It was shown that the use of farnesol, cinnamaldehyde or terpinen-4-ol at a concentration of 2 mg/mL could be at least 80% effective on S. aureus strains and their biofilms. 

  • 43.
    Usino, David
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Ylitervo, Päivi
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Richards, Tobias
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. Swedish Centre for Resource Recovery, University of Borås, 501 90 Borås, Sweden.
    Effect of Acid Pretreatment on the Primary Products of Biomass Fast Pyrolysis2023Ingår i: Energies, E-ISSN 1996-1073, Vol. 16, nr 5, artikel-id 2377Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A high load of inorganics in raw lignocellulosic biomass is known to inhibit the yield of bio-oil and alter the chemical reactions during fast pyrolysis of biomass. In this study, palm kernel shell (PKS), an agricultural residue from palm oil production, and two other woody biomass samples (mahogany (MAH) sawdust and iroko (IRO) sawdust) were pretreated with distilled water or an acidic solution (either acetic, formic, hydrochloric (HCl) or sulfuric acid (H2SO4)) before fast pyrolysis in order to investigate its effect on the primary products and pyrolysis reaction pathways. The raw and pretreated PKS, MAH and IRO were pyrolysed at 600 °C and 5 s with a micro-pyrolyser connected to a gas chromatograph–mass spectrometer/flame ionisation detector (GC-MS/FID). Of the leaching solutions, HCl was the most effective in removing inorganics from the biomass and enhancing the primary pyrolysis product formed compared to the organic acids (acetic and formic acid). The production of levoglucosan was greatly improved for all pretreated biomasses when compared to the original biomass but especially after HCl pretreatment. Additionally, the relative content of the saccharides was maximised after pretreatment with H2SO4, which was due to the increased production of levoglucosenone. The relative content of the saccharides increased by over 70%. This increase may have occurred due to a possible reaction catalysed by the remaining acid in the biomass. The production of furans, especially furfural, was increased for all pretreatments but most noticeable when H2SO4 was used. However, the relative content of acids and ketones was generally reduced for PKS, MAH and IRO across all leaching solutions. The relative content of the phenol-type compound decreased to a large extent during pyrolysis after acid pretreatment, which may be attributed to dehydration and demethoxylation reactions. This study shows that the production of valuable chemicals could be promoted by pretreatment with different acid solutions.

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  • 44.
    Uwineza, Clarisse
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Bouzarjomehr, Mohammadali
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Parchami, Milad
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Mahboubi, Amir
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Evaluation of in vitro digestibility of Aspergillus oryzae fungal biomass grown on organic residue derived-VFAs as a promising ruminant feed supplement2023Ingår i: Journal of Animal Science and Biotechnology, E-ISSN 2049-1891, Vol. 14, artikel-id 120Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Background

    As demand for high quality animal feed continues to raise, it becomes increasingly important to minimize the environmental impact of feed production. An appealing sustainable approach to provide feed fractions is to use organic residues from agro-food industry. In this regard, volatile fatty acids (VFAs) such as acetic, propionic and butyric acids, derived from bioconversion of organic residues can be used as precursors for production of microbial protein with ruminant feed inclusion potential. This study aims to investigate the in vitro digestibility of the Aspergillus oryzae edible fungal biomass cultivated on VFAs-derived from anaerobic digestion of residues. The produced fungal protein biomass, along with hay clover silage and rapeseed meal were subjected to various in vitro assays using two-stage Tilley and Terry (TT), gas, and bag methods to evaluate and compare its digestibility for application in ruminant feed.

    Results

    The produced fungal biomass contained a higher crude protein (CP) (41%–49%) and rather similar neutral detergent fiber (NDF) (41%–56%) compared to rapeseed meal. The rumen in vitro dry matter digestibility (IVDMD) of the fungal biomass in the TT method ranged from 82% to 88% (statistically similar to that of the gas method (72% to 85%)). The IVDMD of fungal biomass were up to 26% and 40% greater than that of hay clover silage and rapeseed meal, respectively. The type of substrate and bag method had pronounced effect on the fermentation products (ammonium-N (NH4+-N), total gas and VFAs). Fungal biomass digestion resulted in the highest release of NH4+-N (340–540 mg/L) and the ratio of acetate to propionate ratio (3.5) among subjected substrates.

    Conclusion

    The results indicate that gas method can be used as a reliable predictor for IVDMD as well as fermentation products. Furthermore, the high IVDMD and fermentation product observed for Aspergillus oryzae fungal biomass digestion, suggest that the supplementation of fungal biomass will contribute to improving the rumen digestion by providing necessary nitrogen and energy to the ruminant and microbiota.

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  • 45.
    Uwineza, Clarisse
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Mahboubi, Amir
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Evaluation of the cultivation of aspergillus oryzae on organic waste-derived vfa effluents and its potential application as alternative sustainable nutrient source for animal feed2021Ingår i: Sustainability, E-ISSN 2071-1050, Vol. 13, nr 22, artikel-id 12489Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Considering the projected demand for protein supplementation in animal feed, as well as prioritizing plant-based protein provision for the growing human population, great stress is imposed on conventional protein sources, calling for new sustainable alternatives. In this regard, the production and application of single-cell proteins (SCPs) has proven to be a promising alternative. Therefore, in this study, volatile fatty acids (VFAs) effluents recovered from anaerobically digested FW, CKM, CM, and their combinations were applied for the cultivation of edible filamentous fungi Aspergillus oryzae. The biomass was further evaluated considering its protein, fat and alkali insoluble material contents. The maximum fungal biomass yielded of 0.47 ± 0.00 and 0.37 ± 0.00 g dry biomass/g tVFAsCODeq.consumed, with up to 47% protein and 5% fat content successfully cultivated in shake flasks and bench scale reactors, respectively. In addition to the production of protein-rich biomass, significant reductions in medium COD (25–58%) and ammonium (33–48%) were achieved. The results presented in this research work imply that using waste-derived VFAs for the production of animal feed grade SCP is an innovative approach that can contribute to the economy and sustainability of animal feed production process. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

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  • 46.
    Wang, Ricky
    et al.
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Mahboubi, Amir
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Fristedt, Rikard
    Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96, Gothenburg, Sweden.
    Taherzadeh, Mohammad J
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Undeland, Ingrid
    Food and Nutrition Science, Department of Biology and Biological Engineering, Chalmers University of Technology, 412 96, Gothenburg, Sweden.
    In vitro protein digestibility of edible filamentous fungi compared to common food protein sources2023Ingår i: Food Bioscience, ISSN 2212-4292, E-ISSN 2212-4306, Vol. 54, artikel-id 102862Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Edible filamentous fungi, as a source of mycoprotein, is an emerging sustainable protein source as it can be cultivated on food-industry sidestreams, thus providing the food system with circularity. However, the digestibility of mycoprotein from different species of fungi is yet to be studied and compared to commonly consumed food proteins derived from muscle. Using the static INFOGEST in vitro gastrointestinal (GI) digestion protocol, but with less pancreatin than the recommended amount to omit high background from enzyme autolysis, this study investigated the protein degree of hydrolysis (DH%) and amino acid accessibility of five species of edible fungi in comparison with salmon fillet, chicken breast, beef tenderloin and casein. Three of the edible fungi species reached protein DH% between 58% ± 2.6% and 62% ± 5.6% during GI digestion compared to chicken, salmon, and beef reaching 62%–67% as well as casein at 55%. The amino acid accessibility of fungi (81%–92%), was comparable to that of salmon, chicken breast, and beef (90%–94%). This study thus indicated that edible fungi is a sustainable and nutritionally sound protein source.

    Ladda ner fulltext (pdf)
    fulltext
  • 47.
    Zhou, Yuwen
    et al.
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
    Qin, Shiyi
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
    Verma, Shivpal
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
    Sar, Taner
    Högskolan i Borås, Akademin för textil, teknik och ekonomi.
    Sarsaiya, Surendra
    Key Laboratory of Basic Pharmacology and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, Zunyi Medical University, Zunyi, Guizhou, China.
    Ravindran, Balasubramani
    Department of Environmental Energy and Engineering, Kyonggi University, Youngtong – Gu, Suwon 16227, South Korea.
    Liu, Tao
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
    Sindhu, Raveendran
    Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India.
    Kumar Patel, Anil
    Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan.
    Binod, Parameswaran
    Microbial Processes and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST), Thiruvananthapuram, Kerala, 695019, India.
    Varjani, Sunita
    Gujarat Pollution Control Board, Gandhinagar, Gujarat 382010, India.
    Rani Singhnia, Reeta
    Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan.
    Zhang, Zengqiang
    College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
    Mukesh Kumar, Awasthi
    Högskolan i Borås, Akademin för textil, teknik och ekonomi. College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi Province 712100, PR China.
    Production and beneficial impact of biochar for environmental application: A comprehensive review2021Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, artikel-id 125451Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    This review focuses on a holistic view of biochar, production from feedstock’s, engineering production strategies, its applications and future prospects. This article reveals a systematic emphasis on the continuation and development of biochar and its production methods such as Physical engineering, chemical and bio-engineering techniques. In addition, biochar alternatives such as nutrient formations and surface area made it a promising cheap source of carbon-based products such as anaerobic digestion, gasification, and pyrolysis, commercially available wastewater treatment, carbons, energy storage, microbial fuel cell electrodes, and super-capacitors repair have been reviewed. This paper also covers the knowledge blanks of strategies and ideas for the future in the field of engineering biochar production techniques and application as well as expand the technology used in the circular bio-economy.

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