玉米秸秆－牛粪不同配比对沼气产量的影响

摘要

Four treatments including cow manure-maize straw at the ratio of 2∶1 ( A), cow manure ( B) , maize straw ( C) , cow manure-maize straw at the ratio of 1∶2 ( D) were set to study the effects of dif-ferent proportions of cow manure and maize straw on biogas production under anaerobic fermentation with the total solid (TS) concentration as 10% at (30 ±1)℃.The duration of this test was 55 days.The results showed that the total biogas yield of the treatments was in the order of A>D>B>C.The change of daily bio-gas yield and daily cumulative biogas yield had great differences between different treatments.The biogas peak of treatment A was present during 17~26 days, while that of treatment D was present during 22~23 days. The total biogas yield of treatment A and D was 6 997 mL and 6 842 mL respectively, which were higher than that of treatment B and C.In conclusion, the mixture fermentation of cow manure and maize straw could accel-erate biogas producing rate, improve biogas production status, and increase the biogas producing potential.%试验设牛粪－玉米秸秆质量比2∶1（A）、牛粪（B）、玉米秸秆（C）、牛粪－玉米秸秆质量比1∶2（D）4个处理，在温度为（30±1）℃、发酵液（TS）浓度为10％的条件下，研究粪秆比对沼气厌氧发酵产气量的影响。结果表明，试验55 d各处理总产气量大小依次为A＞D＞B＞C。发酵过程中各处理日产气量变化和日累积产气量差异明显，A处理产气高峰主要在17～26 d，D处理主要在22～33 d，A和D处理总产气量分别为6997 mL和6842 mL，高于B处理和C处理。因此，牛粪－秸秆混合发酵可明显提高产气速率，改善产气状况，提高发酵原料产气潜力。