Development of combined nanofiltration and forward osmosis process for production of ethanol from pretreated rice straw

Masafumi Shibuya, Kengo Sasaki, Yasuhiro Tanaka, Masahiro Yasukawa, Tomoki Takahashi, Akihiko Kondo, Hideto Matsuyama

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

A membrane process combining nanofiltraion (NF) and forward osmosis (FO) was developed for the sugar concentration with the aim of high bio-ethanol production from the liquid fraction of rice straw. The commercial NF membrane, ESNA3, was more adequate for removal of fermentation inhibitors (such as acetic acid) than the FO membrane, whereas the commercial FO membrane, TFC-ES, was more adequate for concentration of the sugars than the NF membrane. The liquid fraction was subjected to the following process: NF concentration with water addition (NF(+H2O)) → enzymatic hydrolysis → FO concentration. This NF(+H2O)-FO hybrid process generated a total sugar content of 107 g·L−1. Xylose-assimilating S. cerevisiae produced 24 g·L−1 ethanol from the liquid fraction that was diluted 1.5-fold and then concentrated by the NF(+H2O)-FO hybrid process. The NF(+H2O)-FO hybrid process has the potential for optimized ethanol production from pretreated lignocellulosic biomass.

Original languageEnglish
Pages (from-to)405-410
Number of pages6
JournalBioresource Technology
Volume235
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • Bio-ethanol
  • Fermentation
  • Forward osmosis
  • Nanofiltration
  • Rice straw

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