发酵条件对典型木质纤维素原料产沼气影响实验
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公益性行业(农业)科研专项经费资助项目(201303091)和中央高校基本科研业务费专项资金资助项目(2011PY007、2013PY056)


Effect of Anaerobic Fermentation Conditions on Biogas Yields from Typical Lignocellulosic Materials
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    摘要:

    为探讨木质纤维素原料的厌氧发酵产沼气特性,选取玉米秸、稻秸、棉秸、油菜秸、中药渣、甘蔗渣和造纸渣等典型木质纤维素原料,研究了堆沤时间、初始pH值和接种率对其产沼气特性的影响,并且比较了多种原料在中温(35±2)℃和高温(53±2)℃条件下的产气特性。结果表明,棉秸、甘蔗渣不经堆沤无法启动发酵,堆沤时间为7 d时产气率最高;油菜秸不经堆沤即可启动,且产气率最高。各原料中,中温时稻秸产气能力最大(352.56 mL/g),且高温时产气率仅增加20.92%,因此可选取中温发酵模式;高温时青玉米秸产气能力最高(480.00 mL/g),高温时产气率提高了82.49%,适于采取高温发酵。中药渣和造纸渣在高温时产气率提升幅度显著。

    Abstract:

    In order to explore the biogas production characteristics of lignocellulosic feedstock, some typical materials including maize straw, rice straw, cotton straw, rape straw, herbal residue, bagasse and papermaking residue were chosen as substrates to analyze the effect of retting time, initial pH value and inoculation rate on their biogas productions. And the biogas production potential difference between mesophilic ((35±2)℃) and thermophilic fermentation ((53±2)℃) was compared as well. The results indicated that cotton straw and bagasse could not be started successfully to produce biogas without retting, but could obtain the highest biogas production after 7 d retting operation. And rape straw could be fermented successfully and even gain the highest biogas production without any retting. Among all the raw materials, rice straw could gain the largest biogas production under the mesophilic fermentation condition (352.56 mL/g). And its biogas yield could only be increased by 20.92% when the fermentation status was changed from mesophilic to thermophilic condition, which meant that mesophilic fermentation might be suitable for rice straw. Under the thermophilic fermentation condition, the silage maize straw could gain the highest biogas yield (480.00 mL/g), which was 82.49% higher than the mesophilic fermentation. So the thermophilic fermentation might be perfect for silage maize straw. In addition, the biogas production could also be increased gigantically for herbal and papermaking residues when the thermophilic fermentation condition was adopted.

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晏水平,高鑫,艾平,袁巧霞.发酵条件对典型木质纤维素原料产沼气影响实验[J].农业机械学报,2013,44(Supp2):136-142.

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  • 在线发布日期: 2013-10-21
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