title: Enhanced fermentability of poplar by combination of alkaline peroxide pretreatment and semi-simultaneous saccharification and fermentation.
abstract: To improve ethanol productivity with few inhibitors generated, a novel process of combined alkaline peroxide (AP) pretreatment and semi-simultaneous saccharification and fermentation (SSSF) was developed in this work. Pretreatment with 10% (g H2O2/g wood) H2O2 at 160°C for 2h followed by SSSF was found to be the optimal combination with remarkably increased ethanol yield. The proposed process resulted in 63.1% of ethanol yield, which was about five times more than that of the untreated sample that was processed using conventional simultaneous saccharification and fermentation (SSF). The efficient conversion was ascribed to the high delignification efficiency (64.9%) of AP pretreatment, which led to incompact structure and generation of fewer inhibitors during SSSF (c. 6g/L of lactic acid) than SSF (c. 10 g/L of lactic acid). This combined approach was proved to be an effective method for the promotion of the bioconversion of lignocellulosic materials.
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
authors.forename: Liming
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
authors.forename: Tingting
authors.initials: T
authors.lastname: You
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Yang
authors.affiliation: Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China. Electronic address: xfx315@bjfu.edu.cn.
authors.forename: Feng
authors.initials: F
authors.lastname: Xu
mesh_terms: D000468:Alkalies / Q000494:pharmacology*; D001709:Biotechnology / Q000379:methods*; D050260:Carbohydrate Metabolism / Q000187:drug effects*; D002480:Cellulase / Q000378:metabolism; D002482:Cellulose / Q000378:metabolism; D003460:Crystallization; D005285:Fermentation / Q000187:drug effects*; D006861:Hydrogen Peroxide / Q000494:pharmacology*; D006868:Hydrolysis / Q000187:drug effects; D032107:Populus / Q000187:drug effects / Q000378:metabolism*; D013696:Temperature
chemical_list: D000468:Alkalies; D002482:Cellulose; D006861:Hydrogen Peroxide; D002480:Cellulase
keywords: Alkaline peroxide; Bioethanol; Inhibitors; Poplar; Semi-simultaneous saccharification and fermentation