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Inhibitory effect of long-chain fatty acids on biogas production and the 1 protective effect of reverse membrane bioreactors (RMBR)

Dasa Kriswulan ; Suspansa westman ; Ria Millati ; Muhammad Kuyanto ; Claes Niklasson (Institutionen för kemi och kemiteknik) ; Mohammad J. Taherzadeh
New Horizons in Biotechnology 2015 in Trivandrum, India. (2015)
[Konferensbidrag, refereegranskat]

Abstract 1 Anaerobic digestion of lipid-containing wastes for biogas production is often hampered 2 by the inhibitory effect of long chain fatty acids (LCFAs). In this study, the inhibitory 3 effects of LCFAs (palmitic, stearic, and oleic acid) on biogas production as well as the 4 protective effect of a reverse membrane bioreactor (RMBR) against LCFAs was 5 examined in thermophilic batch digesters. The results showed that palmitic and oleic 6 acid with concentrations of 3.0 and 4.5 g/L resulted in >50% inhibition on the biogas 7 production, while stearic acid had an even stronger inhibitory effect. The encased cells 8 in the RMBR system were able to perform better in the presence of LCFAs. This system 9 exhibited a significantly lower percentage of inhibition than the free cell system, not 10 reaching over 50% at any LCFA concentration tested. 1

Nyckelord: Anaerobic digestion, biogas, membrane bioreactor, LCFAs, inhibitor

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Denna post skapades 2016-02-25.
CPL Pubid: 232443