Whole slurry fermentation of maleic acid-pretreated oil palm empty fruit bunches for ethanol production not necessitating a detoxification process

Young Hoon Jung, In Jung Kim, Hyun Kyung Kim, Kyoung Heon Kim

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The yield of ethanol from oil palm empty fruit bunches (EFB) was increased on exploiting maleic acid pretreatment combined with fermentation of the pretreated whole slurry. The optimized conditions for pretreatment were to expose EFB to a high temperature (190°C) with 1 % (w/v) maleic acid for a short time duration (3 min ramping to the set temperature with no holding) in a microwave digester. An enzymatic digestibility of 60.9 % (based on theoretical glucose yield) was exhibited using pretreated and washed EFB after 48 h of hydrolysis. Simultaneous saccharification and fermentation (SSF) of the whole slurry of pretreated EFB for 48 h resulted in 61.3 % theoretical yield of ethanol based on the initial amount of glucan in untreated EFB. These results indicate that maleic acid is a suitable catalyst not requiring detoxification steps for whole slurry fermentation of EFB for ethanol production, thus improving the process economics. Also, the whole slurry fermentation can significantly increase the biomass utilization by converting sugar from both solid and liquid phases of the pretreated slurry.

Original languageEnglish
Pages (from-to)659-665
Number of pages7
JournalBioprocess and Biosystems Engineering
Volume37
Issue number4
DOIs
Publication statusPublished - 2014 Apr

Keywords

  • Ethanol
  • Maleic acid
  • Oil palm empty fruit bunches
  • Pretreatment
  • Whole slurry fermentation

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering

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