Combination of high solids loading pretreatment and ethanol fermentation of whole slurry of pretreated rice straw to obtain high ethanol titers and yields

Young Hoon Jung, Hyun Min Park, Dong Hyun Kim, Yong Cheol Park, Jin Ho Seo, Kyoung Heon Kim

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In cellulosic ethanol production using lignocellulose, an increase in biomass solids loading during the pretreatment process significantly affects the final ethanol titer and the production cost. In this study, pretreatment using rice straw at high solids loading (20% (w/v)) was evaluated, using maleic acid as a catalyst. After pretreatment at optimal conditions of 190°C, 20min, and 0.2% or 5% (w/v) maleic acid, the highest enzymatic digestibility obtained was over 80%. Simultaneous saccharification and fermentation (SSF) of the whole slurry of pretreated rice straw in the presence of activated carbon to separate inhibitory compounds generated a high ethanol yield of 62.8%, based on the initial glucan in unpretreated rice straw. These findings suggest that high solids loading pretreatment using maleic acid and SSF of the whole slurry of pretreated rice straw can be combined to improve the process economics of ethanol production.

Original languageEnglish
Pages (from-to)861-866
Number of pages6
JournalBioresource Technology
Volume198
DOIs
Publication statusPublished - 2015 Dec 1

Keywords

  • High solids loading
  • Lignocellulose
  • Maleic acid
  • Pretreatment
  • Whole slurry fermentation

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

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