Change search
Link to record
Permanent link

Direct link
BETA
Taherzadeh, Mohammad JORCID iD iconorcid.org/0000-0003-4887-2433
Alternative names
Publications (10 of 369) 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
Show others...
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., Richards, T. & Taherzadeh, M. J. (2018). Combined gasification-fermentation process in waste biorefinery. In: Waste Biorefinery: Potential and Perspectives. Elsevier
Open this publication in new window or tab >>Combined gasification-fermentation process in waste biorefinery
2018 (English)In: Waste Biorefinery: Potential and Perspectives, Elsevier, 2018Chapter in book (Refereed)
Abstract [en]

Thermal processes of wastes lead to production of energy in form of electricity and/or heat. However, if the goal is to produce materials, thermochemical processes can be applied. These processes via e.g. gasification produce raw syngas that is a mixture of principally H2, CO and CO2, with some impurities. This raw syngas is traditionally cleaned and catalytically treated via chemical processes such as Fischer-Tropsch. However, as there is a variety of microorganisms that can assimilate syngas, this gas can be used as a substrate to produce different chemicals via biochemical routes. This chapter is dedicated to describe an efficient thermochemical-biochemical route of waste treatment. The gasification process, the design and the factors that affect the syngas composition are firstly described. Thereafter, the microbiology, biochemical reactions, metabolic pathways and process conditions toward production of several metabolic products from syngas such as carboxylic acids, ethanol, butanol, 2,3-butanediol, methane and biopolymers are presented. 

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Gasification, Fermentation, Biofuels, Valuable chemicals
National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-14190 (URN)9780444639929 (ISBN)
Funder
Swedish Research Council
Available from: 2018-05-16 Created: 2018-05-16 Last updated: 2018-06-21Bibliographically approved
Nair, R. B., Gmoser, R., Lennartsson, P. R. & Taherzadeh, M. J. (2018). Does the second messenger cAMP have a more complex role in controlling filamentous fungal morphology and metabolite production?. MicrobiologyOpen
Open this publication in new window or tab >>Does the second messenger cAMP have a more complex role in controlling filamentous fungal morphology and metabolite production?
2018 (English)In: MicrobiologyOpen, ISSN 2045-8827, E-ISSN 2045-8827Article in journal (Refereed) Published
Place, publisher, year, edition, pages
Blackwell Publishing Ltd, 2018
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-14831 (URN)10.1002/mbo3.627 (DOI)20458827 (ISSN) (ISBN)
Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-02
Souza Filho, P. F., Zamani, A. & Taherzadeh, M. J. (2018). Edible Protein Production by Filamentous Fungi using Starch Plant Wastewater. Waste and Biomass Valorization, 1-10
Open this publication in new window or tab >>Edible Protein Production by Filamentous Fungi using Starch Plant Wastewater
2018 (English)In: Waste and Biomass Valorization, ISSN 1877-2641, p. 1-10Article in journal (Refereed) Published
Abstract [en]

The process to obtain starch from wheat requires high amounts of water, consequently generating large amounts of wastewater with very high environmental loading. This wastewater is traditionally sent to treatment facilities. This paper introduces an alternative method, where the wastewater of a wheat-starch plant is treated by edible filamentous fungi (Aspergillus oryzae and Rhizopus oryzae) to obtain a protein-rich biomass to be used as e.g. animal feed. The wastewater was taken from the clarified liquid of the first and second decanter (ED1 and ED2, respectively) and from the solid-rich stream (SS), whose carbohydrate and nitrogen concentrations ranged between 15 and 90 and 1.25–1.40 g/L, respectively. A. oryzae showed better performance than R. oryzae, removing more than 80% of COD after 3 days for ED1 and ED2 streams. Additionally, 12 g/L of dry biomass with protein content close to 35% (w/w) was collected, demonstrating the potential of filamentous fungi to be used in wastewater valorization. High content of fermentable solids in the SS sample led to high production of ethanol (10.91 g/L), which can be recovered and contribute to the economics of the process.

Place, publisher, year, edition, pages
Springer Netherlands, 2018
Keywords
Bioethanol, Filamentous fungi, Fungal biomass, Wastewater treatment
National Category
Other Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-14846 (URN)10.1007/s12649-018-0265-2 (DOI)2-s2.0-85042924369 (Scopus ID)18772641 (ISSN) (ISBN)
Available from: 2018-08-01 Created: 2018-08-01 Last updated: 2018-08-20
Osadolor, O. A. (2018). Effect of media rheology and bioreactor hydrodynamics on filamentous fungi fermentation of lignocellulosic and starch-based substrates under pseudoplastic flow conditions. Bioresource Technology, 263, 250-257
Open this publication in new window or tab >>Effect of media rheology and bioreactor hydrodynamics on filamentous fungi fermentation of lignocellulosic and starch-based substrates under pseudoplastic flow conditions
Show others...
2018 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 263, p. 250-257Article in journal (Refereed) Published
Abstract [en]

The aim of this work was to study how media rheology and bioreactor hydrodynamics would influence fermentation of lignocellulosic and starch-based substrates under pseudoplastic flow conditions. This was investigated using hydrolyzed wheat straw, wheat-based thin stillage and filamentous fungi as inoculum in bubble column, airlift and horizontal hybrid tubular/bubble column (textile bioreactor) bioreactors. The rheological models showed that the consistency index was dependent on biomass growth (R2 0.99) while the flow behavior index depended on biomass growth and suspended solid (R2 0.99). Oxygen transfer rate above 0.356 mmol-O2/L/h was needed for growing fungi with a cube-root growth rate constant of 0.03 g1/3/L1/3/h. At 1.4 VVM aeration the textile bioreactor performed better than others with minimal foaming, yields of 0.22 ± 0.01 g/g and 0.47 ± 0.01 g/g for ethanol and biomass, substrate consumption rate of 0.38 g/L/h. Operating the bioreactors with air-flowrate to cross-sectional area ratio of 8.75 × 10−3 (m3/s/m2) or more led to sustained foaming.

Keywords
Foaming Oxygen transfer rate, Rheology model, Fungi growth kinetics, Bioreactor hydrodynamics
National Category
Chemical Process Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-14345 (URN)10.1016/j.biortech.2018.04.093 (DOI)2-s2.0-85046700875 ()
Available from: 2018-06-21 Created: 2018-06-21 Last updated: 2018-07-10Bibliographically 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.

Keywords
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
Mahmoodi, P., Karimi, K. & Taherzadeh, M. J. (2018). Efficient conversion of municipal solid waste to biofuel by simultaneous dilute-acid hydrolysis of starch and pretreatment of lignocelluloses. Energy Conversion and Management, 166, 569-578
Open this publication in new window or tab >>Efficient conversion of municipal solid waste to biofuel by simultaneous dilute-acid hydrolysis of starch and pretreatment of lignocelluloses
2018 (English)In: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 166, p. 569-578Article in journal (Refereed) Published
Abstract [en]

The organic fraction of municipal solid waste (OFMSW) is a complex mixture of easily digestible compounds, mainly starchy materials, and hardly digestible compounds, mainly lignocelluloses. Thus, OFMSW has a high potential for biofuel production after the hydrolysis of carbohydrates. In this study, dilute-acid treatment was used for the hydrolysis of starchy materials, eliminating the amylases enzymes requirement. Besides, the acid treatment acted as a pretreatment for the improvement of lignocelluloses fractions prior to the enzymatic hydrolysis of lignocelluloses. The acid treatment was conducted with 0.5 and 1% (w/w) sulfuric acid at 130 and 160 °C for 0, 30, and 60 min. The treatment with 1% acid at 130 °C for 60 min resulted in the hydrolysate with the highest glucose concentration of 43.2 g/L, mainly originated from starchy materials, and the subsequent enzymatic hydrolysis of the treated solids resulted in a hydrolysate containing 23.4 g/L glucose, mainly from cellulose. These hydrolysates, containing different sugars and inhibitors, were then subjected to ethanolic fermentation using a highly inhibitor-tolerant strain of Zygomycetes fungi, Mucor indicus. Using acid treatment with 1% at 130 °C for 60 min, without detoxification, the ethanol yield of 44.6 and 44.4 g per 100 g glucose was obtained from hydrolysate and acid treatment liquor, respectively. The liquid remained after the separation of ethanol from fermentation liquor and the residual solid remained after enzymatic hydrolysis were subjected to anaerobic digestion for biogas production. Overall, 194.0 g ethanol and 144.8 L methane were produced from each kg of dry OFMSW through the consecutive processes. Therefore, without detoxification and amylases requirement, all biodegradable parts of MSW were converted to bioenergy in the form of ethanol and biogas, resulting in the production of 10,453 kJ energy and 326.6 mL gasoline equivalent from each kg of dry OFMSW. © 2018 Elsevier Ltd

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
Keywords
Bioethanol, Biogas, Dilute-acid treatment, Enzymatic hydrolysis, Municipal solid waste
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-14826 (URN)10.1016/j.enconman.2018.04.067 (DOI)000434004200048 ()2-s2.0-85046355959 (Scopus ID)01968904 (ISSN) (ISBN)
Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-08Bibliographically approved
Mahmoodi, P., Karimi, K. & Taherzadeh, M. J. (2018). Hydrothermal processing as pretreatment for efficient production of ethanol and biogas from municipal solid waste. Bioresource Technology, 261, 166-175
Open this publication in new window or tab >>Hydrothermal processing as pretreatment for efficient production of ethanol and biogas from municipal solid waste
2018 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 261, p. 166-175Article in journal (Refereed) Published
Abstract [en]

Organic fraction of municipal solid waste (OFMSW) is dominated by carbohydrates, including starch-based and lignocellulosic materials. The OFMSW was hydrothermally pretreated at 100–160 °C for 0–60 min, and then assessed for enzymatic ethanol production, followed by biogas production from the stillage. The highest glucose yield of 520 g/Kg of dry OFMSW, corresponding to 131% increase compared to that of the untreated OFMSW, was obtained after the pretreatment and enzymatic hydrolysis. Through ethanolic fermentation by an inhibitory tolerant fungus, Mucor indicus, 191.10 g ethanol/Kg of dry OFMSW was obtained, which was a 140.9% improvement in the ethanol yield compared to that from the untreated one. Methane production from the stillage (waste residues) resulted in 156 L/Kg OFMSW. In other words, a total of 10,774 KJ energy/Kg of dry OFMSW was generated at the best conditions. 

Place, publisher, year, edition, pages
Elsevier Ltd, 2018
Keywords
Biomethane, Enzymatic hydrolysis, Ethanol, Hydrothermal pretreatment, Municipal solid waste
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-14825 (URN)10.1016/j.biortech.2018.03.115 (DOI)000433211600020 ()2-s2.0-85045283711 (Scopus ID)09608524 (ISSN) (ISBN)
Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-08-08Bibliographically approved
Fatemeh Seyedpour, S., Rahimpour, A., Mohsenian, H. & Taherzadeh, M. J. (2018). Low fouling ultrathin nanocomposite membranes for efficient removal of manganese. Journal of Membrane Science, 549, 205-216
Open this publication in new window or tab >>Low fouling ultrathin nanocomposite membranes for efficient removal of manganese
2018 (English)In: Journal of Membrane Science, ISSN 0376-7388, E-ISSN 1873-3123, Vol. 549, p. 205-216Article in journal (Refereed) Published
Abstract [en]

The key to make an ideal thin film composite membrane is the reduction of active layer thickness as much as possible to improve the water permeability without adverse effect on selectivity. Hence, ultra-thin nanocomposite membranes were prepared via dip coating method composed of chitosan incorporated graphene oxide on the surface of polyethersulfone (PES) substrate, followed by ionic crosslinking with sodium tripolyphosphate (TPP). By incorporation of graphene oxide on the chitosan solution, the thickness of selective layer considerably decreased to around 45 nm and higher surface hydrophilicity was obtained. The chitosan/graphene oxide ultra-thin modified nanocomposite membrane exhibited state-of-art flux (around 55 LMH) and high manganese removal (around 85%) at low pressure of 3 bar. Moreover, these membranes demonstrated up to 98% inhibition in the bacteria proliferation, indicating reasonable antibacterial activity of ultra-thin layer. Besides, the antifouling ability of the nanocomposite membrane increased dramatically, where the flux recovery ratio of 52% and 93% attained for BSA and E. coli, respectively.

Place, publisher, year, edition, pages
Elsevier B.V., 2018
Keywords
Antimicrobial, Manganese removal, Nanocomposite membrane, Nanometer active layer
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-14807 (URN)10.1016/j.memsci.2017.12.012 (DOI)000424393100022 ()2-s2.0-85037992281 (Scopus ID)03767388 (ISSN) (ISBN)
Available from: 2018-08-03 Created: 2018-08-03 Last updated: 2018-08-08Bibliographically 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
Show others...
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
Keywords
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: 2018-08-20Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-4887-2433

Search in DiVA

Show all publications