title: Efficient approach for bioethanol production from red seaweed Gelidium amansii.
abstract: Gelidium amansii (GA), a red seaweed species, is a popular source of food and chemicals due to its high galactose and glucose content. In this study, we investigated the potential of bioethanol production from autoclave-treated GA (ATGA). The proposed method involved autoclaving GA for 60min for hydrolysis to glucose. Separate hydrolysis and fermentation processing (SHF) achieved a maximum ethanol concentration of 3.33mg/mL, with a conversion yield of 74.7% after 6h (2% substrate loading, w/v). In contrast, simultaneous saccharification and fermentation (SSF) produced an ethanol concentration of 3.78mg/mL, with an ethanol conversion yield of 84.9% after 12h. We also recorded an ethanol concentration of 25.7mg/mL from SSF processing of 15% (w/v) dry matter from ATGA after 24h. These results indicate that autoclaving can improve the glucose and ethanol conversion yield of GA, and that SSF is superior to SHF for ethanol production.
authors.affiliation: Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Ho Myeong
authors.initials: HM
authors.lastname: Kim
authors.affiliation: Bio-Energy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Seung Gon
authors.initials: SG
authors.lastname: Wi
authors.affiliation: Department of Wood Science and Landscape Architecture, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Sera
authors.initials: S
authors.lastname: Jung
authors.affiliation: Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea.
authors.forename: Younho
authors.initials: Y
authors.lastname: Song
authors.affiliation: Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea; Bio-Energy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea; Department of Wood Science and Landscape Architecture, Chonnam National University, Gwangju 500-757, Republic of Korea. Electronic address: baehj@chonnam.ac.kr.
authors.forename: Hyeun-Jong
authors.initials: HJ
authors.lastname: Bae
mesh_terms: D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D005947:Glucose; D006868:Hydrolysis; D000461:Rhodophyta / Q000737:chemistry / Q000378:metabolism*; D012624:Seaweed / Q000378:metabolism*
chemical_list: D000431:Ethanol; D005947:Glucose
keywords: Autoclaving; Bioethanol; Gelidium amansii; Red seaweed; SSF