Effect of NaOH pretreatment on methane yield of corn straw at different temperatures by anaerobic digestion

被引：0
作者：
机构：
[1] Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan
[2] Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu 610041, Sichuan
[3] Medical College, Hebei University of Engineering, Handan 056038, Hebei
[4] Northwest A and F University, Yangling 712100, Shaanxi
来源：
Liu, X. (liuxf@cib.ac.cn) | 1876年 / Materials China卷 / 65期
关键词：
Anaerobic digestion; Corn straw; Methane yield; NaOH; Pretreatment;
D O I：
10.3969/j.issn.0438-1157.2014.05.045
中图分类号：
学科分类号：
摘要：
Methane production through anaerobic digestion (AD) using agricultural straw is an important way to resolve the energy shortage in rural China. However, the AD technology is limited by low conversion efficiency due to recalcitrant nature of lignocellulosic structure in the straw. In the present study, the effect of sodium hydroxide (NaOH) pretreatment at three temperatures on the biogasification performance of corn straw through AD was evaluated by using a laboratory-scale, continuous anaerobic biogas digester. NaOH pretreatment was effective in biodegradation of the lignocellulosic structure of corn straw. The cellulose content of pretreated straw was decreased by 24.4% to 33.2%, the hemicellulose content decreased by 14.2% to 52.4%, and the lignin content decreased by 9.3% to 29.3%, compared with those of untreated straw. The highest methane yield, 188.7 ml CH4·(g VS)-1, was achieved when the corn straw was pretreated with 8% NaOH at 55°C, which was 84.2% higher than that of untreated straw. Therefore, pretreatment of 8% NaOH at 55°C is recommended to improve biodegradability and enhance anaerobic digestibility of straw. © All Rights Reserved.
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页码：1876 / 1882
页数：6
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