| 不同温度下氢氧化钠预处理对玉米秸秆甲烷产量的影响 |
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| 引用本文： | 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, 65(5): 1876-1882. DOI: 10.3969/j.issn.0438-1157.2014.05.045 |
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| 作者姓名： | 宋籽霖 孙雪文 杨改河 闫志英 袁月祥 李东 李香真 刘晓风 |
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| 作者单位： | 1.中国科学院环境与应用微生物重点实验室, 四川 成都 610041;2.环境微生物四川省重点实验室, 四川 成都 610041;3.河北工程大学医学院, 河北 邯郸 056038;4.西北农林科技大学, 陕西 杨凌 712100 |
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| 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）。 |
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| 摘 要： | 利用农作物秸秆进行厌氧发酵生产沼气是解决我国农村能源紧张的重要途径，然而秸秆中难以降解的木质纤维结构导致在发酵过程中甲烷转化率较低。利用自行设计的可控性恒温发酵装置，以玉米秸秆为发酵原料，分析了在不同温度条件下氢氧化钠（NaOH）预处理对秸秆木质纤维结构以及厌氧发酵产气效率的影响。结果表明，NaOH预处理能够显著降低玉米秸秆的木质纤维素含量，与未预处理的秸秆相比，经NaOH处理后的秸秆纤维素含量降低了24.4%～33.2%，半纤维素含量降低了14.2%～52.4%，木质素含量降低了9.3%～29.3%。在6%、8%和10%浓度中，经8%NaOH处理的秸秆在55℃下的甲烷产量最高，达到188.7 ml CH4·（g VS）-1，较未处理的增加了84.2%，因此可作为提高秸秆厌氧发酵产气效率的预处理方法。
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| 关 键 词： | 甲烷产量 厌氧发酵 NaOH 预处理 玉米秸秆 |
| 收稿时间： | 2013-12-26 |
| 修稿时间： | 2014-02-13 |
Effect of NaOH pretreatment on methane yield of corn straw at different temperatures by anaerobic digestion |
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| SONG Zilin,SUN Xuewen,YANG Gaihe,YAN Zhiying,YUAN Yuexiang,LI Dong,LI Xiangzhen,LIU Xiaofeng. Effect of NaOH pretreatment on methane yield of corn straw at different temperatures by anaerobic digestion[J]. Journal of Chemical Industry and Engineering(China), 2014, 65(5): 1876-1882. DOI: 10.3969/j.issn.0438-1157.2014.05.045 |
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| Authors: | SONG Zilin SUN Xuewen YANG Gaihe YAN Zhiying YUAN Yuexiang LI Dong LI Xiangzhen LIU Xiaofeng |
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| Affiliation: | 1.Key Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, Sichuan, China;2.Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu 610041, Sichuan, China;3.Medical College, Hebei University of Engineering, Handan 056038, Hebei, China;4.Northwest A&F University, Yangling 712100, Shaanxi, China |
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| 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·(g VS)-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. |
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| Keywords: | methane yield anaerobic digestion NaOH pretreatment corn straw |
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