title: Optimization of the process for biodiesel production using a mixture of immobilized Rhizopus oryzae and Candida rugosa lipases.
abstract: In this study, the enzymatic process for biodiesel production was optimized using a mixture of immobilized Rhizopus oryzae and Candida rugosa lipases. The optimal temperature and agitation speed for biodiesel production were 45oC and 300 rpm, respectively. The optimal ratio of R. oryzae and C. rugosa lipases in the mixture was 3:1 (w:w). When 3mmol of methanol was the initial reaction medium and 3mmol of methanol was added every 1.5 h during biodiesel production, biodiesel conversion was over 98% at 4 h. In addition, when the immobilized lipase mixture was reused, biodiesel conversion exceeded 80% after 5 reuses.
authors.affiliation: Department of Chemical and Biological Engineering, Korea University, Seoul 136-701, Korea.
authors.forename: Jong Ho
authors.initials: JH
authors.lastname: Lee
authors.forename: Dong Hwan
authors.initials: DH
authors.lastname: Lee
authors.forename: Jung Soo
authors.initials: JS
authors.lastname: Lim
authors.forename: Byung-Hwan
authors.initials: BH
authors.lastname: Um
authors.forename: Chulhwan
authors.initials: C
authors.lastname: Park
authors.forename: Seong Woo
authors.initials: SW
authors.lastname: Kang
authors.forename: Seung Wook
authors.initials: SW
authors.lastname: Kim
mesh_terms: D019149:Bioreactors; D002175:Candida / Q000201:enzymology*; D004736:Energy-Generating Resources; D004800:Enzymes, Immobilized / Q000378:metabolism*; D017743:Equipment Reuse; D008049:Lipase / Q000378:metabolism*; D000432:Methanol / Q000378:metabolism; D012233:Rhizopus / Q000201:enzymology*; D013024:Soybean Oil / Q000378:metabolism; D013696:Temperature
chemical_list: D004800:Enzymes, Immobilized; D013024:Soybean Oil; D008049:Lipase; D000432:Methanol