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Taherzadeh, Mohammad JORCID iD iconorcid.org/0000-0003-4887-2433
Alternative names
Publications (10 of 322) Show all publications
Millati, R., Lukitawesa, L., Permanasari, E. D., Sari, K. W., Cahyanto, M. N., Niklasson, C. & Taherzadeh, M. J. (2018). Anaerobic digestion of citrus waste using two-stage membrane bioreactor. In: IOP Conference Series: Materials Science and Engineering: . Paper presented at Quality in Research: International Symposium on Materials, Metallurgy, and Chemical Engineering, Bali, July 24–27, 2017.. , 316, Article ID 012063.
Open this publication in new window or tab >>Anaerobic digestion of citrus waste using two-stage membrane bioreactor
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2018 (English)In: IOP Conference Series: Materials Science and Engineering, 2018, Vol. 316, article id 012063Conference paper, Published paper (Refereed)
Abstract [en]

Anaerobic digestion is a promising method to treat citrus waste. However, the presence of limonene in citrus waste inhibits anaerobic digestion process. Limonene is an antimicrobial compound and could inhibit methane forming bacteria that takes a longer time to recover than the injured acid forming bacteria. Hence, volatile fatty acids will be accumulated and methane production will be decreased. One way to solve this problem is by conducting anaerobic digestion process into two stages. The first step is aimed for hydrolysis, acidogenesis, and acetogenesis reactions and the second stage is aimed for methanogenesis reaction. The separation of the system would further allow each stage in their optimum conditions making the process more stable. In this research, anaerobic digestion was carried out in batch operations using 120 ml-glass bottle bioreactors in 2 stages. The first stage was performed in free-cells bioreactor, whereas the second stage was performed in both bioreactor of free cells and membrane bioreactor. In the first stage, the reactor was set into 'anaerobic' and 'semi-aerobic' conditions to examine the effect of oxygen on facultative anaerobic bacteria in acid production. In the second stage, the protection of membrane towards the cells against limonene was tested. For the first stage, the basal medium was prepared with 1.5 g VS of inoculum and 4.5 g VS of citrus waste. The digestion process was carried out at 55°C for four days. For the second stage, the membrane bioreactor was prepared with 3 g of cells that were encased and sealed in a 3×6 cm2polyvinylidene fluoride membrane. The medium contained 40 ml basal medium and 10 ml liquid from the first stage. The bioreactors were incubated at 55°C for 2 days under anaerobic condition. The results from the first stage showed that the maximum total sugar under 'anaerobic' and 'semi-aerobic' conditions was 294.3 g/l and 244.7 g/l, respectively. The corresponding values for total volatile fatty acids were 3.8 g/l and 2.9 g/l, respectively. Methane production of citrus waste taken from the first stage under 'anaerobic' condition in membrane and free-cells bioreactors was 11.2 Nml and 7.2 Nml, respectively. Whereas, methane production of citrus waste taken from the first stage under 'semi-aerobic' condition in membrane and free-cells bioreactors was 8.8 Nml and 5.7 Nml, respectively. It can be seen from the results of the first stage that volatile fatty acids from 'anaerobic' condition was higher than that of 'semi-aerobic' condition. The absence of oxygen provides the optimal condition for growth and metabolism of facultative and obligatorily anaerobic bacteria in the first stage. Furthermore, polyvinylidene fluoride membrane was able to protect the cells from antimicrobial compounds.

National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-14027 (URN)10.1088/1757-899X/316/1/012063 (DOI)2-s2.0-85045624058 (Scopus ID)
Conference
Quality in Research: International Symposium on Materials, Metallurgy, and Chemical Engineering, Bali, July 24–27, 2017.
Available from: 2018-05-03 Created: 2018-05-03 Last updated: 2018-05-03Bibliographically approved
Chandolias, K., Wainaina, S., Niklasson, C. & Taherzadeh, M. J. (2018). Effects of Heavy Metals and pH on the Conversion of Biomass to Hydrogen via Syngas Fermentation. BioResources
Open this publication in new window or tab >>Effects of Heavy Metals and pH on the Conversion of Biomass to Hydrogen via Syngas Fermentation
2018 (English)In: BioResources, ISSN 1930-2126, E-ISSN 1930-2126Article in journal (Refereed) Published
Abstract [en]

The effects of three heavy metals on hydrogen production via syngas fermentation were investigated within a metal concentration range of 0-1.5 mg Cu/L, 0-9 mg Zn/L, 0-42 mg Mn/L, in media with initial pH of 5, 6 and 7, at 55 °C. The results showed that at lower metal concentration, pH 6 was optimum while at higher metal concentrations, pH 5 stimulated the process. More specifically, the highest hydrogen production activity recorded was 155.28% ± 12.02% at a metal concentration of 0.04 mg Cu/L, 0.25 mg Zn/L, and 1.06 mg Mn/L and an initial medium pH of 6. At higher metal concentration (0.625 mg Cu/L, 3.75 mg Zn/L, and 17.5 mg Mn/L), only pH 5 was stimulating for the cells. The results show that the addition of heavy metals, contained in gasification-derived ash, can improve the production rate and yield of fermentative hydrogen. This could lead in lower costs in gasification process and fermentative hydrogen production and less demand for syngas cleaning before syngas fermentation.

Keyword
Gasification; Syngas; Fermentative hydrogen; Heavy metals; pH
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-14189 (URN)
Funder
Swedish Research Council
Available from: 2018-05-16 Created: 2018-05-16 Last updated: 2018-05-18Bibliographically approved
Lennartsson, P. R., Ferreira, J. A., Taherzadeh, M. J., Lundin, M. & Gmoser, R. (2018). Pigment Production by the Edible Filamentous Fungus Neurospora Intermedia. Fermentation, 4(11), 1-15
Open this publication in new window or tab >>Pigment Production by the Edible Filamentous Fungus Neurospora Intermedia
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2018 (English)In: Fermentation, ISSN 2311-5637, Vol. 4, no 11, p. 1-15Article in journal (Refereed) Published
Abstract [en]

The production of pigments by edible filamentous fungi is gaining attention as a result of the increased interest in natural sources with added functionality in the food, feed, cosmetic, pharmaceutical and textile industries. The filamentous fungus Neurospora intermedia, used for production of the Indonesian food “oncom”, is one potential source of pigments. The objective of the study was to evaluate the fungus’ pigment production. The joint effect from different factors (carbon and nitrogen source, ZnCl2, MgCl2 and MnCl2) on pigment production by N. intermedia is reported for the first time. The scale-up to 4.5 L bubble column bioreactors was also performed to investigate the effect of pH and aeration. Pigment production of the fungus was successfully manipulated by varying several factors. The results showed that the formation of pigments was strongly influenced by light, carbon, pH, the co-factor Zn2+ and first- to fourth-order interactions between factors. The highest pigmentation (1.19 ± 0.08 mg carotenoids/g dry weight biomass) was achieved in a bubble column reactor. This study provides important insights into pigmentation of this biotechnologically important fungus and lays a foundation for future utilizations of N. intermedia for pigment production. 

Place, publisher, year, edition, pages
Göteborg: , 2018
Keyword
pigments; neurospora intermedia; carotenoids; edible filamentous fungi; ascomycetes
National Category
Engineering and Technology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-13654 (URN)10.3390/fermentation4010011 (DOI)
Available from: 2018-02-14 Created: 2018-02-14 Last updated: 2018-02-15Bibliographically approved
Pagés Díaz, J., Pereda Reyes, I., Sanz, J. L., Lundin, M., Taherzadeh, M. J. & Sárvári Horváth, I. (2017). A comparison of process performance during the anaerobic mono-and co-digestion of slaughter house waste through different operational modes. Journal of Environmental Sciences(China)
Open this publication in new window or tab >>A comparison of process performance during the anaerobic mono-and co-digestion of slaughter house waste through different operational modes
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2017 (English)In: Journal of Environmental Sciences(China), ISSN 1001-0742, E-ISSN 1878-7320Article in journal (Refereed) Accepted
Abstract [en]

The use of consecutive feeding was applied to investigate the response of the microbial biomass to a second addition of substrates in terms of biodegradation using batch tests as a promising alternative to predict the behavior of the process. Anaerobic digestion (AD) of the slaughterhouse waste (SB) and its co-digestion with manure (M), various crops (VC), and municipal solid waste were evaluated. The results were then correlated to previous findings obtained by the authors for similar mixtures in batch and semi-continuous operation modes. AD of the SB failed showing total inhibition after a second feeding. Co-digestion of the SB + M showed a significant improvement for all of the response variables investigated after the second feeding, while co-digestion of the SB + VC resulted in a decline in all of these response variables. Similar patterns were previously detected, during both the batch and the semi-continuous modes.

Keyword
Co-digestion, Biomethane potential test, Second feeding, Specific methanogenic activity, Slaughterhouse waste
National Category
Bioenergy
Identifiers
urn:nbn:se:hb:diva-13561 (URN)10.1016/j.jes.2017.06.004 (DOI)2-s2.0-85021321465 (Scopus ID)
Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2018-01-18Bibliographically approved
Ferreira, J. A., Lennartsson, P. R. & Taherzadeh, M. J. (2017). Airlift bioreactors for fish feed fungal biomass production using edible filamentous fungi. In: FFBiotech Symposium, University of Lille, Villeneuve d'Ascq, France: . Paper presented at FFBiotech Symposium, Villeneuve d'Ascq, May 15-16, 2017.
Open this publication in new window or tab >>Airlift bioreactors for fish feed fungal biomass production using edible filamentous fungi
2017 (English)In: FFBiotech Symposium, University of Lille, Villeneuve d'Ascq, France, 2017Conference paper, Oral presentation only (Refereed)
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-12527 (URN)
Conference
FFBiotech Symposium, Villeneuve d'Ascq, May 15-16, 2017
Available from: 2017-08-27 Created: 2017-08-27 Last updated: 2017-09-28Bibliographically approved
Ferreira, J. A., Lennartsson, P. R. & Taherzadeh, M. J. (2017). Airlift bioreactors for fish feed fungal biomass production using edible filamentous fungi. In: : . Paper presented at FFBiotech Symposium, Villeneuve, May 15-16, 2017.
Open this publication in new window or tab >>Airlift bioreactors for fish feed fungal biomass production using edible filamentous fungi
2017 (English)Conference paper, Poster (with or without abstract) (Refereed)
Abstract [en]

Airlift bioreactors are generally considered to be better alternatives for cultivation of filamentous fungi in comparison to stirred-tank bioreactors or bubble columns bioreactors. The reason for the former includes fungal growth around all internal parts including impellers, baffles or pH, temperature and oxygen probes limiting mass transfer, whereas the latter is limited by air flow rates that can be applied before the system provides deficient mixing and so mass transfer rates. Spent sulphite liquor, a by-product from the paper pulp industry, was used for cultivation of edible Rhizopus sp., a strain isolated from Indonesian tempeh used as human food, using a 26 L airlift bioreactor. Increasing the aeration rate from 0.15 to 1 vvm led to increased biomass production (1 vs 7 g/L). The aeration rate was also found to influence fungal morphology and metabolite production during batch cultivation. Rhizopus sp. shifted from mycelial suspensions at 0.15 and 0.5 vvm to small compact pellets of regular size at 1 vvm. The production of ethanol and lactic acid, a proof of sub-optimal aeration conditions, was also reduced when increasing the aeration rate from 0.15 to 1 vvm. The produced biomass was found to be composed, on a dry weight basis, of 30-50% protein, 2-7% lipids, and 3-9% glucosamine. Considering the edible character of the fungus used as well as its biomass nutritional characteristics, there is a potential for its use as fishmeal replacement within the increasing aquaculture sector.

Keyword
Biomass, Edible filamentous fungi, Rhizopus sp
National Category
Chemical Process Engineering
Identifiers
urn:nbn:se:hb:diva-12205 (URN)
Conference
FFBiotech Symposium, Villeneuve, May 15-16, 2017
Available from: 2017-06-07 Created: 2017-06-07 Last updated: 2017-11-09Bibliographically approved
Wainaina, S., Sárvári Horváth, I. & Taherzadeh, M. J. (2017). Biochemicals from food waste and recalcitrant biomass via syngas fermentation: A review. Bioresource Technology
Open this publication in new window or tab >>Biochemicals from food waste and recalcitrant biomass via syngas fermentation: A review
2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976Article in journal (Refereed) Published
Abstract [en]

An effective method for the production of value-added chemicals from food waste and lignocellulosic materials is a hybrid thermal-biological process, which involves gasification of the solid materials to syngas (primarily CO and H2) followed by fermentation. This paper reviews the recent advances in this process. The special focus is on the cultivation methods that involve the use of single strains, defined mixed cultures and undefined mixed cultures for production of carboxylic acids and higher alcohols. A rate limiting step in these processes is the low mass transfer between the gas and the liquid phases. Therefore, novel techniques that can enhance the gas-liquid mass transfer including membrane- and trickle-bed bioreactors were discussed. Such bioreactors have shown promising results in increasing the volumetric mass transfer coefficient (kLa). High gas pressure also influences the mass transfer in certain batch processes, although the presence of impurities in the gas would impede the process.[on SciFinder (R)]

Keyword
co-cultures, food waste, lignocelluloses, reactor design, syngas fermentation
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-12538 (URN)10.1016/j.biortech.2017.06.075 (DOI)28651875 (PubMedID)2-s2.0-85021202351 (Scopus ID)
Available from: 2017-08-27 Created: 2017-08-27 Last updated: 2017-12-13Bibliographically approved
Mohsenzadeh, A., Zamani, A. & Taherzadeh, M. J. (2017). Bioethylene Production from Ethanol: A Review and Techno-economical Evaluation.. Challenges in Sustainability, 4(2), 75-91
Open this publication in new window or tab >>Bioethylene Production from Ethanol: A Review and Techno-economical Evaluation.
2017 (English)In: Challenges in Sustainability, ISSN 2196-0216, E-ISSN 2196-9744, Vol. 4, no 2, p. 75-91Article in journal (Refereed) Published
Abstract [en]

Manufg. of bioethylene via dehydration of bioethanol is an alternative to the fossil-based ethylene prodn. and decreases the environmental consequences for this chem. commodity. A few industrial plants that utilize 1st generation bioethanol for the bioethylene prodn. already exist, although not functioning without subsidiaries. However, there is still no process producing ethylene from 2nd generation bioethanol. This study is divided into two parts. Different ethanol and ethylene prodn. methods, the process specifications and current technologies are briefly discussed in the first part. In the second part, a techno-economic anal. of a bioethylene plant was performed using Aspen plus and Aspen Process Economic Analyzer, where different qualities of ethanol were considered. The results show that impurities in the ethanol feed have no significant effect on the quality of the produced polymer-grade bioethylene. The capacity of the ethylene storage tank significantly affects the capital costs of the process. [on SciFinder(R)]

Place, publisher, year, edition, pages
Wiley-VCH Verlag GmbH & Co. KGaA, 2017
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-12535 (URN)10.1002/cben.201600025 (DOI)000399898600001 ()
Note

Copyright (C) 2017 American Chemical Society (ACS). All Rights Reserved.; CAPLUS AN 2017:676784(Journal; Online Computer File)

Available from: 2017-08-27 Created: 2017-08-27 Last updated: 2017-09-28Bibliographically approved
Brancoli, P., Ferreira, J. A., Bolton, K. & Taherzadeh, M. J. (2017). Changes in carbon footprint when integrating production of filamentous fungi in 1st generation ethanol plants. Bioresource Technology
Open this publication in new window or tab >>Changes in carbon footprint when integrating production of filamentous fungi in 1st generation ethanol plants
2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976Article in journal (Refereed) Accepted
Abstract [en]

Integrating the cultivation of edible filamentous fungi in the thin stillage from ethanol production is presently being considered. This integration can increase the ethanol yield while simultaneously producing a new value-added protein-rich biomass that can be used for animal feed. This study uses life cycle assessment to determine the change in greenhouse gas (GHG) emissions when integrating the cultivation of filamentous fungi in ethanol production. The result shows that the integration performs better than the current scenario when the fungal biomass is used as cattle feed for system expansion and when energy allocation is used. It performs worse if the biomass is used as fish feed. Hence, integrating the cultivation of filamentous fungi in 1st generation ethanol plants combined with proper use of the fungi can lead to a reduction of GHG emissions which, considering the number of existing ethanol plants, can have a significant global impact.

Keyword
Carbon footprint, Feed products, Life cycle assessment, Ethanol
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-13418 (URN)10.1016/j.biortech.2017.10.085 (DOI)
Available from: 2018-01-12 Created: 2018-01-12 Last updated: 2018-01-12Bibliographically approved
Mahboubi, A., Ylitervo, P., Doyen, W., De Wever, H., Molenberghs, B. & Taherzadeh, M. J. (2017). Continuous bioethanol fermentation from wheat straw hydrolysate with high suspended solid content using an immersed flat sheet membrane bioreactor.. Bioresource Technology, 241, 296-308
Open this publication in new window or tab >>Continuous bioethanol fermentation from wheat straw hydrolysate with high suspended solid content using an immersed flat sheet membrane bioreactor.
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2017 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 241, p. 296-308Article in journal (Refereed) Published
Abstract [en]

Finding a technol. approach that eases the prodn. of lignocellulosic bioethanol has long been considered as a great industrial challenge. In the current study a membrane bioreactor (MBR) set-up using integrated permeate channel (IPC) membrane panels was used to simultaneously ferment pentose and hexose sugars to ethanol in continuous fermn. of high suspended solid wheat straw hydrolyzate. The MBR was optimized to flawlessly operated at high SS concns. of up to 20% without any significant changes in the permeate flux and transmembrane pressure. By the help of the retained high cell concn., the yeast cells were capable of tolerating and detoxifying the inhibitory medium and succeeded to co-consume all glucose and up to 83% of xylose in a continuous fermn. mode leading to up to 83% of the theor. ethanol yield. [on SciFinder(R)]

Place, publisher, year, edition, pages
Elsevier Ltd., 2017
Keyword
Membrane bioreactor, Lignocellulose, Bioethanol, Continuous fermentation
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-12531 (URN)10.1016/j.biortech.2017.05.125 (DOI)000405502400037 ()2-s2.0-85020039248 (Scopus ID)
Note

Copyright (C) 2017 American Chemical Society (ACS). All Rights Reserved.; CAPLUS AN 2017:885722(Journal; Online Computer File)

Available from: 2017-08-27 Created: 2017-08-27 Last updated: 2017-09-28Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0003-4887-2433

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