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Publikationer (7 of 7) Visa alla publikationer
Dasa, K. T., Westman, S. Y., Millati, R., Cahyanto, M. N., Taherzadeh, M. J. & Niklasson, C. (2016). Inhibitory Effect of Long-Chain Fatty Acids on Biogas Production and the Protective Effect of Membrane Bioreactor. BioMed Research International
Öppna denna publikation i ny flik eller fönster >>Inhibitory Effect of Long-Chain Fatty Acids on Biogas Production and the Protective Effect of Membrane Bioreactor
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2016 (Engelska)Ingår i: BioMed Research International, ISSN 2314-6133, E-ISSN 2314-6141Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Anaerobic digestion of lipid-containing wastes for biogas production is often hampered by the inhibitory effect of long-chain fatty acids (LCFAs). In this study, the inhibitory effects of LCFAs (palmitic, stearic, and oleic acid) on biogas production as well as the protective effect of a membrane bioreactor (MBR) against LCFAs were examined in thermophilic batch digesters. The results showed that palmitic and oleic acid with concentrations of 3.0 and 4.5 g/L resulted in >50% inhibition on the biogas production, while stearic acid had an even stronger inhibitory effect. The encased cells in the MBR system were able to perform better in the presence of LCFAs. This system exhibited a significantly lower percentage of inhibition than the free cell system, not reaching over 50% at any LCFA concentration tested.[on SciFinder (R)]

Nationell ämneskategori
Industriell bioteknik
Forskningsämne
Resursåtervinning
Identifikatorer
urn:nbn:se:hb:diva-11431 (URN)000383510200001 ()2-s2.0-84988723547 (Scopus ID)
Anmärkning

MEDLINE AN 2017458109(Journal; Article; (JOURNAL ARTICLE))

Tillgänglig från: 2016-12-14 Skapad: 2016-12-14 Senast uppdaterad: 2018-11-30Bibliografiskt granskad
Youngsukkasem, S., Chandolias, K. & Taherzadeh, M. (2016). Syngas Biomethanation in a Semi-Continuous Reverse Membrane Bioreactor (RMBR). Fermentation, MDPI, 2(2), Article ID 8.
Öppna denna publikation i ny flik eller fönster >>Syngas Biomethanation in a Semi-Continuous Reverse Membrane Bioreactor (RMBR)
2016 (Engelska)Ingår i: Fermentation, MDPI, ISSN 2311-5637, Vol. 2, nr 2, artikel-id 8Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Syngas biomethanation is a potent bio-conversion route, utilizing microorganisms to assimilate intermediate gases to produce methane. However, since methanogens have a long doubling time, the reactor works best at a low dilution rate; otherwise, the cells can be washed out during the continuous fermentation process. In this study, the performance of a practical reverse membrane bioreactor (RMBR) with high cell density for rapid syngas biomethanation as well as a co-substrate of syngas and organic substances was examined in a long-term fermentation process of 154 days and compared with the reactors of the free cells (FCBR). The RMBR reached maximum capacities of H2, CO, and CO2 conversion of 7.0, 15.2, and 4.0 mmol/Lreactor.day, respectively, at the organic loading rate of 3.40 gCOD/L.day. The highest methane production rate from the RMBR was 186.0 mL/Lreactor.day on the 147th day, compared to the highest rate in the FCBR, 106.3 mL/Lreactor.day, on the 58th day. The RMBR had the ability to maintain a high methanation capacity by retaining the microbial cells, which were at a high risk for cell wash out. Consequently, the system was able to convert more syngas simultaneously with the organic compounds into methane compared to the FCBR.

Nyckelord
syngas fermentation; methane production; semi-continuous process; reverse membrane bioreactor; co-substrate; cell retention
Nationell ämneskategori
Teknik och teknologier
Forskningsämne
Resursåtervinning
Identifikatorer
urn:nbn:se:hb:diva-9817 (URN)10.3390/fermentation2020008 (DOI)
Tillgänglig från: 2016-04-28 Skapad: 2016-04-28 Senast uppdaterad: 2019-10-25Bibliografiskt granskad
Chandolias, K., Youngsukkasem, S. & Taherzadeh, M. (2015). Rapid Bio-methanation of Syngas by High Cell-density in Reverse Membrane Bioreactor (RMBR). In: Dibakar Bhattacharyya (University of Kentucky, USA), Benny Freeman (University of Texas, USA) (Ed.), Advanced Membrane Technology VI: Water, Energy and New Frontiers. Paper presented at Advanced Membrane Technology VI: Water, Energy, and New Frontiers, Sicily, Italy,February 8-13, 2015..
Öppna denna publikation i ny flik eller fönster >>Rapid Bio-methanation of Syngas by High Cell-density in Reverse Membrane Bioreactor (RMBR)
2015 (Engelska)Ingår i: Advanced Membrane Technology VI: Water, Energy and New Frontiers / [ed] Dibakar Bhattacharyya (University of Kentucky, USA), Benny Freeman (University of Texas, USA), 2015Konferensbidrag, Poster (med eller utan abstract) (Övrigt vetenskapligt)
Serie
ECI Conference Series
Nyckelord
Syngas Fermentation, Reverse Membrane Bioreactor, High Cell-density
Nationell ämneskategori
Industriell bioteknik
Forskningsämne
Resursåtervinning
Identifikatorer
urn:nbn:se:hb:diva-8522 (URN)
Konferens
Advanced Membrane Technology VI: Water, Energy, and New Frontiers, Sicily, Italy,February 8-13, 2015.
Tillgänglig från: 2016-01-14 Skapad: 2016-01-14 Senast uppdaterad: 2018-04-28Bibliografiskt granskad
Youngsukkasem, S., Chandolias, K. & Taherzadeh, M. J. (2015). Rapid bio-methanation of syngas in a reverse membrane bioreactor: membrane encased microorganisms. Bioresource Technology, 178, 334-40
Öppna denna publikation i ny flik eller fönster >>Rapid bio-methanation of syngas in a reverse membrane bioreactor: membrane encased microorganisms
2015 (Engelska)Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 178, s. 334-40Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The performance of a novel reverse membrane bioreactor (RMBR) with encased microorganisms for syngas bio-methanation as well as a co-digestion process of syngas and organic substances was examined. The sachets were placed in the reactors and examined in repeated batch mode. Different temperatures and short retention time were studied. The digesting sludge encased in the PVDF membranes was able to convert syngas into methane at a retention time of 1 day and displayed a similar performance as the free cells in batch fermentation. The co-digestion of syngas and organic substances by the RMBR (the encased cells) showed a good performance without any observed negative effects. At thermophilic conditions, there was a higher conversion of pure syngas and co-digestion using the encased cells compared to at mesophilic conditions.[on SciFinder (R)]

Nyckelord
cell retention, co-digestion, membrane bioreactor, methane, syngas fermentation
Nationell ämneskategori
Industriell bioteknik
Forskningsämne
Resursåtervinning
Identifikatorer
urn:nbn:se:hb:diva-98 (URN)10.1016/j.biortech.2014.07.071 (DOI)000347150700044 ()2-s2.0-84920157057 (Scopus ID)2320/13980 (Lokalt ID)2320/13980 (Arkivnummer)2320/13980 (OAI)
Anmärkning

MEDLINE AN 2015022368(Journal; Article; (JOURNAL ARTICLE); (RESEARCH SUPPORT, NON-U.S. GOV'T))

Tillgänglig från: 2015-12-06 Skapad: 2015-05-22 Senast uppdaterad: 2019-10-25Bibliografiskt granskad
Wikandari, R., Youngsukkasem, S., Millati, R. & Taherzadeh, M. (2014). Performance of semi-continuous membrane bioreactor in biogas production from toxic feedstock containing D-limonene. Bioresource Technology, 170, 350-355
Öppna denna publikation i ny flik eller fönster >>Performance of semi-continuous membrane bioreactor in biogas production from toxic feedstock containing D-limonene
2014 (Engelska)Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 170, s. 350-355Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A novel membrane bioreactor configuration containing both free and encased cells in a single reactor was proposed in this work. The reactor consisted of 120 g/L of free cells and 120 g/L of encased cells in a polyvinylidene fluoride membrane. Microcrystalline cellulose (Avicel) and d-Limonene were used as the models of substrate and inhibitor for biogas production, respectively. Different concentrations of d-Limonene i.e., 1, 5, and 10 g/L were tested, and an experiment without the addition of d-Limonene was prepared as control. The digestion was performed in a semi-continuous thermophilic reactor for 75 days. The result showed that daily methane production in the reactor with the addition of 1 g/L d-Limonene was similar to that of control. A lag phase was observed in the presence of 5 g/L d-Limonene; however, after 10 days, the methane production increased and reached a similar production to that of the control after 15 days.

Ort, förlag, år, upplaga, sidor
Elsevier, 2014
Nyckelord
Semi continuous, Membrane bioreactor, Encapsulation, Biogas; d-Limonene
Nationell ämneskategori
Industriell bioteknik
Forskningsämne
Resursåtervinning
Identifikatorer
urn:nbn:se:hb:diva-1895 (URN)10.1016/j.biortech.2014.07.102 (DOI)000341357600044 ()25151080 (PubMedID)2320/14038 (Lokalt ID)2320/14038 (Arkivnummer)2320/14038 (OAI)
Tillgänglig från: 2015-11-13 Skapad: 2015-11-13 Senast uppdaterad: 2017-12-01Bibliografiskt granskad
Youngsukkasem, S., Akinbomi, J., Rakshit, S. & Taherzadeh, M. (2013). Biogas production by encased bacteria in synthetic membranes: Protective effects in toxic media and high loading rates. Environmental technology, 34(13-14), 2077-2084
Öppna denna publikation i ny flik eller fönster >>Biogas production by encased bacteria in synthetic membranes: Protective effects in toxic media and high loading rates
2013 (Engelska)Ingår i: Environmental technology, ISSN 0959-3330, E-ISSN 1479-487X, Vol. 34, nr 13-14, s. 2077-2084Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A bioreactor including encased digesting bacteria for biogas production was developed, and its performance in toxic media and under high organic loading rates (OLRs) was examined and compared with traditional digestion reactors. The bacteria (3 g) were encased and sealed in 3 × 6cm 2 PVDF (polyvinylidene fluoride) membranes with a pore size of 0.1 μ m, and then several sachets were placed in the reactors. They were then examined in toxic medium containing up to 3% limonene as a model inhibitor in batch reactors, and OLRs of up to 20 g COD / L.day in semi-continuous digestions. The free and encased cells with an identical total bacterial concentration of 9 g in a medium containing 2% limonene produced at most 6.56 and 23.06 mL biogas per day, respectively. In addition, the digestion with free cells completely failed at an OLR of 7.5 g COD / L.day, while the encased cells were still fully active with a loading of 15 g COD / L.day.

Ort, förlag, år, upplaga, sidor
Tailor & Francis, 2013
Nyckelord
Resource Recovery
Nationell ämneskategori
Industriell bioteknik
Forskningsämne
Resursåtervinning
Identifikatorer
urn:nbn:se:hb:diva-1649 (URN)10.1080/09593330.2013.770555 (DOI)000325389900038 ()24350461 (PubMedID)2320/12929 (Lokalt ID)2320/12929 (Arkivnummer)2320/12929 (OAI)
Tillgänglig från: 2015-11-13 Skapad: 2015-11-13 Senast uppdaterad: 2017-12-01Bibliografiskt granskad
Youngsukkasem, S., Barghi, H., Rakshit, S. K. & Taherzadeh, M. T. (2013). Rapid Biogas Production by Compact Multi-Layer Membrane Bioreactor: Efficiency of Synthetic Polymeric Membranesane Reactor for Rapid Biogas Production. Energies, 6(12), 6211-6224
Öppna denna publikation i ny flik eller fönster >>Rapid Biogas Production by Compact Multi-Layer Membrane Bioreactor: Efficiency of Synthetic Polymeric Membranesane Reactor for Rapid Biogas Production
2013 (Engelska)Ingår i: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 6, nr 12, s. 6211-6224Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Entrapment of methane-producing microorganisms between semi-permeable synthetic membranes in a multi-layer membrane bioreactor (MMBR) was studied and compared to the digestion capacity of a free-cell digester, using a hydraulic retention time of one day and organic loading rates (OLR) of 3.08, 6.16, and 8.16 g COD/L·day. The reactor was designed to retain bacterial cells with uprising plug flow through a narrow tunnel between membrane layers, in order to acquire maximal mass transfer in a compact bioreactor. Membranes of hydrophobic polyamide 46 (PA) and hydroxyethylated polyamide 46 (HPA) as well as a commercial membrane of polyvinylidene fluoride (PVDF) were examined. While the bacteria in the free-cell digester were washed out, the membrane bioreactor succeeded in retaining them. Cross-flow of the liquid through the membrane surface and diffusion of the substrate through the membranes, using no extra driving force, allowed the bacteria to receive nutrients and to produce biogas. However, the choice of membrane type was crucial. Synthesized hydrophobic PA membrane was not effective for this purpose, producing 50–121 mL biogas/day, while developed HPA membrane and the reference PVDF were able to transfer the nutrients and metabolites while retaining the cells, producing 1102–1633 and 1016–1960 mL biogas/day, respectively.

Ort, förlag, år, upplaga, sidor
M D P I AG, 2013
Nyckelord
membrane bioreactor, biogas, synthetic membrane, methane, anaerobic digestion, polyamide, PVDF, cell entrapment, Resursåtervinning
Nationell ämneskategori
Teknik och teknologier
Forskningsämne
Resursåtervinning
Identifikatorer
urn:nbn:se:hb:diva-1786 (URN)10.3390/en6126211 (DOI)000330290600005 ()2320/13264 (Lokalt ID)2320/13264 (Arkivnummer)2320/13264 (OAI)
Tillgänglig från: 2015-11-13 Skapad: 2015-11-13 Senast uppdaterad: 2017-12-01Bibliografiskt granskad
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