title: Hydrothermal acid treatment for sugar extraction from Golenkinia sp.
abstract: In this study, hydrothermal acid treatment for efficient recovery of sugar from Golenkinia sp. was investigated. The initial glucose and XMG (xylose, mannose, and galactose) contents of a prepared Golenkinia sp. solution (40g/L) were 15.05 and 5.24g/L, respectively. The microalgal cell walls were hydrolyzed, for sugar recovery, by enzymatic saccharification and/or hydrothermal acid treatment. Among the various hydrothermal acid treatment conditions, the most optimal were the 2.0% H2SO4 concentration at 150°C for 15min, under which the glucose- and XMG-extraction yields were 71.7% and 64.9%, respectively. By pH 4.8, 50°C enzymatic hydrolysis after optimal hydrothermal acid treatment, the glucose- and XMG-extraction yields were additionally increased by 8.3% and 0.8%, respectively. After hydrothermal acid treatment, the combination with the enzymatic hydrolysis process improved the total sugar yield of Golenkinia sp. to 75.4%.
authors.affiliation: Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea; Department of Chemical & Biological Engineering, Korea Univ., Anam-dong 5-ga, Seongbuk-gu, Seoul 136-713, Republic of Korea.
authors.forename: Sun-A
authors.initials: SA
authors.lastname: Choi
authors.affiliation: Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea.
authors.forename: Won-Il
authors.initials: WI
authors.lastname: Choi
authors.affiliation: Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea.
authors.forename: Jin-Suk
authors.initials: JS
authors.lastname: Lee
authors.affiliation: Department of Chemical & Biological Engineering, Korea Univ., Anam-dong 5-ga, Seongbuk-gu, Seoul 136-713, Republic of Korea.
authors.forename: Seung Wook
authors.initials: SW
authors.lastname: Kim
authors.affiliation: NLP Corporation, 86-103 Hwajeon 2-gil, Ilgwang-myeon, Gijang-gun, Busan 619-912, Republic of Korea.
authors.forename: Gye-An
authors.initials: GA
authors.lastname: Lee
authors.affiliation: NLP Corporation, 86-103 Hwajeon 2-gil, Ilgwang-myeon, Gijang-gun, Busan 619-912, Republic of Korea.
authors.forename: Jihyun
authors.initials: J
authors.lastname: Yun
authors.affiliation: Biomass and Waste Energy Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 305-343, Republic of Korea. Electronic address: yearn@kier.re.kr.
authors.forename: Ji-Yeon
authors.initials: JY
authors.lastname: Park
mesh_terms: D002241:Carbohydrates / Q000737:chemistry / Q000302:isolation & purification*; D002458:Cell Fractionation; D002480:Cellulase / Q000737:chemistry; D000460:Chlorophyta / Q000737:chemistry*; D000431:Ethanol / Q000737:chemistry / Q000302:isolation & purification*; D006358:Hot Temperature; D006868:Hydrolysis; D058086:Microalgae / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D001617:beta-Glucosidase / Q000737:chemistry
chemical_list: D002241:Carbohydrates; D013464:Sulfuric Acids; D014867:Water; D000431:Ethanol; D001617:beta-Glucosidase; D002480:Cellulase; C033158:sulfuric acid
keywords: Enzymatic hydrolysis; Glucose; Golenkinia sp.; Hydrothermal acid treatment; Sugar extraction