Optimization of alkali-extrusion pretreatment with twin-screw for bioethanol production from Miscanthus

被引：52

作者：

Kang, Kyeong Eop ^{[1
]}

Han, Minhee ^{[1
]}

Moon, Se-Kwon ^{[1
]}

Kang, Hyun-Woo ^{[1
]}

Kim, Yule ^{[1
]}

Cha, Young-Lok ^{[2
]}

Choi, Gi-Wook ^{[1
]}

机构：

[1] Changhae Ethanol Co Ltd, Changhae Adv Inst Technol, Jeonju 561203, South Korea

[2] RDA, Bioenergy Crop Res Ctr, NICS, Muan 534833, Jeonnam, South Korea

来源：

FUEL | 2013年 / 109卷

关键词：

Miscanthus; Bioethanol; Twin-screw extruder; Pretreatment; Simultaneous saccharification and fermentation; ENZYMATIC-HYDROLYSIS; CORN STOVER; SACCHARIFICATION; DELIGNIFICATION; TECHNOLOGIES; FERMENTATION; KINETICS; LIGNIN; ACID; WOOD;

D O I：

10.1016/j.fuel.2013.03.026

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

This study investigated the production of bioethanol from Miscanthus using a specially designed twin-screw extruder (designated CHEMET) with sodium hydroxide. Pretreatment parameters were optimized using a response surface methodology and we evaluated the efficiency of pretreatment through the biomass to ethanol ratio (BTER). Optimum pretreatment conditions were 95 degrees C, 0.4 M sodium hydroxide concentration, 80 rpm twin-screw speed, and flow rate of 120 mL/min. Under these optimum conditions, actual BTER was 66 +/- 2%, compared with a theoretical maximum of 67 +/- 3%. Simultaneous saccharification and fermentation (SSF) was used to optimize enzyme and biomass dosage, giving a maximized ethanol concentration of 67.0 g/L and an ethanol conversion rate of 88.1% for 25% loading of pretreated Miscanthus with 30 FPU/g glucose of enzyme. The findings contribute to the development of continuous-production methods of obtaining bioethanol from lignocellulosic biomass. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：520 / 526

页数：7

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