Journal
BIOPROCESS AND BIOSYSTEMS ENGINEERING
Volume 38, Issue 8, Pages 1623-1627Publisher
SPRINGER
DOI: 10.1007/s00449-015-1387-6
Keywords
Volatile fatty acids (VFAs); Rice straw; Pretreatment; Anaerobic digestion
Funding
- Ministry of Oceans and Fisheries [20131039449]
- Ministry of Land, Infrastructure and Transport [14CTAP-C077534-01]
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Rice straw is one of the most abundant renewable biomass sources and was selected as the feedstock for the production of volatile fatty acids (VFAs) from which microbial biodiesel can be produced. Two kinds of chemical pretreatments involving nitric acid and sodium hydroxide were investigated at 150 A degrees C with 20 min of reaction time. The nitric acid pretreatment generated the most hemicellulose hydrolyzate, while significant reduction of the lignin occurred with sodium hydroxide pretreatment. Anaerobic digestion of 20 g/L rice straw yielded 6.00 and 7.09 g VFAs/L with 0.5 % HNO3 and 2 % NaOH, respectively. The VFAs yield with 2 % NaOH was 0.35 g/g.
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