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化工学报  2015 

厌氧发酵起始阶段通氧对玉米秸秆产甲烷特性的影响

DOI: 10.11949/j.issn.0438-1157.20141447, PP. 1111-1116

Keywords: 厌氧发酵,通氧,甲烷,modified,first,order,equation分析,VS降解率

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Abstract:

基于厌氧发酵起始阶段的氧供应量控制,研究了厌氧发酵起始阶段通氧对玉米秸秆产甲烷特性的影响。当氧气供应量为10ml·(gVS)-1时,甲烷产量达到最大为299.8ml·(gVS)-1,相对于不做处理的样品甲烷产量提高了8.4%。但是,氧气供应量的继续提高并没有带来甲烷产量的升高,当氧气供应量大于40ml·(gVS)-1时,甲烷产量相对于不做处理的秸秆样品轻微下降。modifiedfirstorderequation模型拟合分析表明起始阶段微好氧处理可以加快底物的水解速度,但氧气供应量过大会延长厌氧发酵的延滞时间。另外,经过起始阶段通氧处理,秸秆厌氧发酵的VS降解率也有所提高。

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