고속 압출 전처리 공정을 이용한 Chlorella sp. 당화 및 바이오에탄올 생산 KCI

Title
고속 압출 전처리 공정을 이용한 Chlorella sp. 당화 및 바이오에탄올 생산
Alternative Title
Saccharification and Ethanol Production from Chlorella sp. Through High Speed Extrusion Pretreatment
Author(s)
이춘근; 최운용; 서용창; 송치호; 안주희; 정경환; 이상은; 강도형; 이현용
KIOST Author(s)
Kang, Do-Hyung(강도형)
Publication Year
2012-06
Abstract
Among various pretreatment processes for bioethanol production, extrusion pretreatment, one of cheap and simple process was investigated to efficiently produce fermentable sugars from micro alga, Chlorella sp. The biomass was pretreated in a single screw extruder at five different barrel temperatures of 45, 50, 55, 60 and 65∘C , respectively with five screw rotation speed of 10, 50, 100, 150 and 200 rpm. The pretreated biomass was reacted with two different hydrolyzing enzymes of cellulase and amyloglucosidase since the biomass contained different types of carbohydrates, compared to cellulose of agricultural by-products such wheat and corn stovers, etc. In general, higher glucose conversion yield was obtained as 13.24 (%, w/w) at 55∘C of barrel temperature and 100 rpm of screw speed conditions. In treating 5 FPU/glucan of cellulase and 150 Unit/mL of amyloglucosidase, ca. 64% of cellulose and 40% of polysaccharides in the micro alga were converted into glucose, which was higher yields than those from other reported data without applying an extrusion process. 84% of the fermentable sugars obtained from the hyrolyzing processes were fermented into ethanol in considering 50% of theoretical maximum fermentation yield of the yeast. These results implied that high speed extrusion could be suitable as a pretreatment process for the production of bioethanol from Chlorella sp.
ISSN
1225-7117
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/1729
Bibliographic Citation
KSBB Journal, v.27, no.3, pp.137 - 144, 2012
Publisher
한국생물공학회
Keywords
Extruder; Pretreatment; Bioethanol; Microalgae; Enzyme treatment
Type
Article
Language
Korean
Publisher
한국생물공학회
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