化工学报Issue(5)：1876-1882,7.DOI:10.3969/j.issn.0438-1157.2014.05.045
不同温度下氢氧化钠预处理对玉米秸秆甲烷产量的影响
Effect of NaOH pretreatment on methane yield of corn straw at different temperatures by anaerobic digestion
摘要
Abstract
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·(gVS)-1, was achieved when the corn straw was pretreated with 8% NaOH at 55℃, which was 84.2% higher than that of untreated straw. Therefore, pretreatment of 8% NaOH at 55℃ is recommended to improve biodegradability and enhance anaerobic digestibility of straw.关键词
甲烷产量/厌氧发酵/NaOH/预处理/玉米秸秆Key words
methane yield/anaerobic digestion/NaOH/pretreatment/corn straw分类
农业科技引用本文复制引用
宋籽霖,孙雪文,杨改河,闫志英,袁月祥,李东,李香真,刘晓风..不同温度下氢氧化钠预处理对玉米秸秆甲烷产量的影响[J].化工学报,2014,(5):1876-1882,7.基金项目
国家重点基础研究发展计划项目(2013CB733502)；四川省应用基础研究计划项目（2013JY0050）；中国科学院研究项目（KGZD-EW-304-1）。@@@@supported by the National Basic Research Program of China (2013CB733502), the Applied Basic Research Program of Sichuan Province (2013JY0050) and the Deployment Project of Chinese Academy of Sciences (KGZD-EW-304-1) （2013CB733502）
