Enhanced volatile fatty acid production from oil palm empty fruit bunch through acidogenic fermentation - A novel resource recovery strategy for oil palm empty fruit bunch
Journal article, 2021

The glucan-rich fraction, hemicellulosic compounds-rich fraction, and a mixture of both fractions obtained from organosolv pretreatment of oil palm empty fruit bunch (OPEFB) were used as substrates to produce volatile fatty acids (VFAs) in acidogenic fermentation. In this study, the effects of medium adjustment (carbon to nitrogen ratio and trace elements supplementation) and methanogenesis inhibition (through the addition of 2-bromoethanesulfonate or by heat shock) to enhance VFAs yield were investigated. The highest VFA yield was 0.50 ± 0.00 g VFAs/g volatile solid (VS), which was obtained when methanogens were inhibited by heat shock and cultivated in a mixture of glucan-rich and hemicellulosic compounds-rich fractions. Under these conditions, the fermentation produced acetic acid as the only VFA. Based on the results, the mass balance of the whole process (from pretreatment and fermentation) showed the possibility to obtain 30.4 kg acetic acid and 20.3 kg lignin with a 70% purity from 100 kg OPEFB.

Waste valorization

Methanogenesis inhibition

Oil palm empty fruit bunch

Acetic acid

Acidogenic fermentation

Volatile fatty acids

Author

Kinanthi Mondylaksita

University of Borås

Gadjah Mada University

Jorge A. Ferreira

University of Borås

Wiratni Budhijanto

Gadjah Mada University

Claes Niklasson

Chalmers, Chemistry and Chemical Engineering, Chemical Technology

Mohammad Taherzadeh Esfahani

University of Borås

Ria Millati

Gadjah Mada University

Fermentation

23115637 (eISSN)

Vol. 7 4 263

Subject Categories

Renewable Bioenergy Research

Food Engineering

Chemical Process Engineering

DOI

10.3390/fermentation7040263

More information

Latest update

12/7/2021