Inhibitory Effect of Long-Chain Fatty Acids on Biogas Production and the Protective Effect of Membrane Bioreactor
Journal article, 2016

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.

Bioreactor Inhibtion Biogas Membrane


Kris Dasa

Gadjah Mada University

Suspansa Westman

University of Borås

Ria Millati

Gadjah Mada University

M. N. Cahyanto

Gadjah Mada University

Mohammad Taherzadeh Esfahani

University of Borås

Claes Niklasson

Chalmers, Chemistry and Chemical Engineering, Chemical Technology

BioMed Research International

2314-6133 (ISSN) 2314-6141 (eISSN)

Vol. 2016 ID:7263974 9 pages- 7263974

Subject Categories

Industrial Biotechnology

Chemical Engineering

Environmental Biotechnology

Areas of Advance


Life Science Engineering (2010-2018)



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3/8/2018 9