title: Biorefinery of instant noodle waste to biofuels.
abstract: Instant noodle waste, one of the main residues of the modern food industry, was employed as feedstock to convert to valuable biofuels. After isolation of used oil from the instant noodle waste surface, the starch residue was converted to bioethanol by Saccharomyces cerevisiae K35 with simultaneous saccharification and fermentation (SSF). The maximum ethanol concentration and productivity was 61.1g/l and 1.7 g/lh, respectively. After the optimization of fermentation, ethanol conversion rate of 96.8% was achieved within 36 h. The extracted oil was utilized as feedstock for high quality biodiesel conversion with typical chemical catalysts (KOH and H2SO4). The optimum conversion conditions for these two catalysts were estimated; and the highest biodiesel conversion rates were achieved 98.5% and 97.8%, within 2 and 3h, respectively. The high conversion rates of both bioethanol and biodiesel demonstrate that novel substrate instant noodle waste can be an attractive biorefinery feedstock in the biofuels industry.
authors.affiliation: Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-dong, Sungbuk-Gu, Seoul 136-701, Republic of Korea.
authors.forename: Xiaoguang
authors.initials: X
authors.lastname: Yang
authors.affiliation: Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-dong, Sungbuk-Gu, Seoul 136-701, Republic of Korea.
authors.forename: Sang Jun
authors.initials: SJ
authors.lastname: Lee
authors.affiliation: Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-dong, Sungbuk-Gu, Seoul 136-701, Republic of Korea.
authors.forename: Hah Young
authors.initials: HY
authors.lastname: Yoo
authors.affiliation: Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-dong, Sungbuk-Gu, Seoul 136-701, Republic of Korea.
authors.forename: Han Suk
authors.initials: HS
authors.lastname: Choi
authors.affiliation: Department of Chemical Engineering, Kwangwoon University, 447-1, Wolgye-dong, Nowon-Gu, Seoul 139-701, Republic of Korea. Electronic address: chpark@kw.ac.kr.
authors.forename: Chulhwan
authors.initials: C
authors.lastname: Park
authors.affiliation: Department of Chemical and Biological Engineering, Korea University, 5 Ga, Anam-dong, Sungbuk-Gu, Seoul 136-701, Republic of Korea. Electronic address: kimsw@korea.ac.kr.
authors.forename: Seung Wook
authors.initials: SW
authors.lastname: Kim
mesh_terms: D055162:Biocatalysis; D056804:Biofuels; D050260:Carbohydrate Metabolism; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D005502:Food; D006863:Hydrogen-Ion Concentration; D012037:Refuse Disposal / Q000379:methods*; D012441:Saccharomyces cerevisiae / Q000378:metabolism; D013696:Temperature; D014866:Waste Products / Q000032:analysis*
chemical_list: D056804:Biofuels; D014866:Waste Products; D000431:Ethanol
keywords: Biodiesel; Bioethanol; Fermentation; Instant noodle waste; Transesterification