Simultaneous saccharification and fermentation of steam exploded duckweed: Improvement of the ethanol yield by increasing yeast titre

BioChem - DOS

Search

메타 데이터

바이오화학분류

- 바이오플라스틱
  1. 플라스틱
- 바이오정밀화학
  1. 용매
  2. 화학제품
  3. 연료
- 화장품용 기능성소재
  1. 계면활성제⁄증점제
- 의료용 화학소재
  1. 식품첨가제

논문

Simultaneous saccharification and fermentation of steam exploded duckweed: Improvement of the ethanol yield by increasing yeast titre

학술지

Bioresource technology : biomass, bioenergy, biowastes, conversion technologies, biotransformations, production technologies

저자명

Zhao, X.; Moates, G.K.; Elliston, A.; Wilson, D.R.; Coleman, M.J.; Waldron, K.W.

초록

<▼1>Highlights•Steam explosion of duckweed enhances SSF at low (2% w/v) substrate concentrations.•High substrate concentrations (20% w/v) result in much lower ethanol yields.•Ethanol yields can be considerably increased with higher yeast inoculum.•Or by preconditioning yeasts in steam explosion liquor containing inhibitors.•The extra/preconditioned yeast metabolise fermentation inhibitors.</▼1><▼2>This study investigated the conversion of Lemna minor biomass to bioethanol. The biomass was pre-treated by steam explosion (SE, 210 °C, 10 min) and then subjected to simultaneous saccharification and fermentation (SSF) using Cellic® CTec 2 (20 U or 0.87 FPU g−1 substrate) cellulase plus β-glucosidase (2 U g−1 substrate) and a yeast inoculum of 10% (v/v or 8.0 × 107 cells mL−1). At a substrate concentration of 1% (w/v) an ethanol yield of 80% (w/w, theoretical) was achieved. However at a substrate concentration of 20% (w/v), the ethanol yield was lowered to 18.8% (w/w, theoretical). Yields were considerably improved by increasing the yeast titre in the inoculum or preconditioning the yeast on steam exploded liquor. These approaches enhanced the ethanol yield up to 70% (w/w, theoretical) at a substrate concentration of 20% (w/v) by metabolising fermentation inhibitors.</▼2>

발행연도

2015

발행기관

Elsevier Applied Science ;, Elsevier Science Pub. Co

라이선스

cc-by-nc-nd

ISSN

0960-8524

권

194

페이지

pp.263-269

DOI

10.1016/j.biortech.2015.06.131

상세정보링크

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART72444182

주제어

BG, Novozyme® 188; CE, Celluclast® 1.5; CTec 2, Cellic® CTec 2; CWMs, cell wall materials; FDM, freeze dry and freeze mill; SE, steam explosion; SSF, simultaneous saccharification and fermentation; YM, yeast and mould broth; Duckweed; Bioethanol production; Steam explosion; Cellulase; Simultaneous saccharification and fermentation