title: Enhancement of volatile fatty acids production from rice straw via anaerobic digestion with chemical pretreatment.
abstract: 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 °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.
authors.affiliation: Department of Chemical and Bimolecular Engineering, KAIST, Daejeon, 305-701, Korea.
authors.forename: Gwon Woo
authors.initials: GW
authors.lastname: Park
authors.forename: Ilgook
authors.initials: I
authors.lastname: Kim
authors.forename: Kwonsu
authors.initials: K
authors.lastname: Jung
authors.forename: Charles
authors.initials: C
authors.lastname: Seo
authors.forename: Jong-In
authors.initials: JI
authors.lastname: Han
authors.forename: Ho Nam
authors.initials: HN
authors.lastname: Chang
authors.forename: Yeu-Chun
authors.initials: YC
authors.lastname: Kim
mesh_terms: D000693:Anaerobiosis; D018533:Biomass; D005232:Fatty Acids, Volatile / Q000096:biosynthesis*; D017942:Nitric Acid / Q000737:chemistry; D012275:Oryza / Q000737:chemistry*; D011134:Polysaccharides / Q000737:chemistry; D012972:Sodium Hydroxide / Q000737:chemistry*
chemical_list: D005232:Fatty Acids, Volatile; D011134:Polysaccharides; D017942:Nitric Acid; D012972:Sodium Hydroxide; C007916:hemicellulose