title: Inhibitory Effect of Long-Chain Fatty Acids on Biogas Production and the Protective Effect of Membrane Bioreactor.
abstract: 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.
authors.affiliation: Department of Food and Agricultural Product Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia.
authors.forename: Kris Triwulan
authors.initials: KT
authors.lastname: Dasa
authors.affiliation: Swedish Center for Resource Recovery, University of Borås, 50190 Borås, Sweden.
authors.forename: Supansa Y
authors.initials: SY
authors.lastname: Westman
authors.affiliation: Department of Food and Agricultural Product Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia.
authors.forename: Ria
authors.identifier: 0000-0003-4367-1974
authors.initials: R
authors.lastname: Millati
authors.affiliation: Department of Food and Agricultural Product Technology, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia.
authors.forename: Muhammad Nur
authors.initials: MN
authors.lastname: Cahyanto
authors.affiliation: Swedish Center for Resource Recovery, University of Borås, 50190 Borås, Sweden.
authors.forename: Mohammad J
authors.identifier: 0000-0003-4887-2433
authors.initials: MJ
authors.lastname: Taherzadeh
authors.affiliation: Department of Chemistry and Chemical Engineering, Chalmers University of Technology, 41296 Gothenburg, Sweden.
authors.forename: Claes
authors.initials: C
authors.lastname: Niklasson