以猪粪、麦秆为原料,研究了35℃下二者按不同比例混合对厌氧消化产沼气的影响,分析了消化过程中日产气量、累积产气量、甲烷含量、原料去除率、pH值以及氨态氮质量浓度的变化.结果表明,猪粪与麦秆配比(干物质量比)1:1时产气量最大,为383.0 mL/g,是麦秆单独发酵产气量(231.8 mL/g)的1.6倍;混合原料(猪粪和麦秆配比分别为1:1、2:1、3:1)的Vs去除率均在37%以上,比麦秆提高12.0%-26.9%;添加猪粪可提高发酵液中氨态氮含量,较麦秆提高35.6%～64.8%.因此,合理调控粪秆混合厌氧发酵的比例,能提高秸秆的产气率和利用率.%Pig dung and wheat straw (the ratio of pig dung to wheat straw was 1: 1 , 2:1, 3:1) were used as fermentation materials. The experiments were carried out at 35℃. The biogas production rate, cumulative biogas yield, methane content, material reduction, pH value and NH3-N content were tested. The results showed that the co-digestion of pig dung to wheat straw could increase the biogas yield and material reduction of wheat straw. The biogas production yield of 1: 1 was highest (383. 0 mL/g) , which was 1. 6 times of biogas production yield of wheat straw (231. 8 mL/g) . VS reductions of combination materials were 12.0% -26.9% higher than wheat straw. Compared with wheat straw, the NH3-N contents of combination materials increased by 35. 6% ~ 64. 8%. Reasonable co-digestion ratio of livestock dung and crop straw could increase the biogas production rate and utilization of crop straw.
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