title: Development of combined nanofiltration and forward osmosis process for production of ethanol from pretreated rice straw.
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 107g·L-1. Xylose-assimilating S. cerevisiae produced 24g·L-1ethanol 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.
authors.affiliation: Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Shibuya
authors.affiliation: Department of Innovation and Science Technology, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Kengo
authors.initials: K
authors.lastname: Sasaki
authors.affiliation: Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Tanaka
authors.affiliation: Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yasukawa
authors.affiliation: Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Takahashi
authors.affiliation: Department of Innovation and Science Technology, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Kondo
authors.affiliation: Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodaicho, Nada-ku, Kobe 657-8501, Japan. Electronic address: matuyama@kobe-u.ac.jp.
authors.forename: Hideto
authors.initials: H
authors.lastname: Matsuyama
mesh_terms: D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation; D006868:Hydrolysis; D012275:Oryza; D009995:Osmosis; D012441:Saccharomyces cerevisiae; D014994:Xylose
chemical_list: D000431:Ethanol; D014994:Xylose
keywords: Bio-ethanol; Fermentation; Forward osmosis; Nanofiltration; Rice straw