小麦、玉米秸秆不同预处理产沼气试验研究

摘要

In order to explore the changing rules of gas production and methane content of different pretreated straw, com and wheat straw were pretreated respectively with biogas slurry, green stalk ling. Six treatments were set up. The results showed that, under ambient temperature, keeping the same TS concentration and C / N ratio, the TS gas production rate and the methane content from high to low in turn were; com straw treated with green stalks ling, com straw treated with biogas slurry, wheat straw treated with green stalks ling, wheat straw treated with biogas slurry, com ck, and wheat ck. The differences among the treatments reached significant level. The gas production effect of green stalks ling pretreatment for straw is better than that with biogas slurry. For the same pretreatment, the TS gas production rate and methane production rate for com were higher than those of wheat. It showed that com straw is more suitable for biogas fermentation than wheat straw.%为探讨秸秆不同预处理产气量及甲烷含量的变化规律,本试验在实验室分别用沼液、绿秸灵预处理玉米及小麦秸秆,共设置六个处理进行秸秆沼气发酵试验.结果表明:在常温并保持相同浓度和C/N比的发酵条件下,单位质量干物质产气率(TS产气率)及甲烷含量的大小顺序均为:玉米秸秆+绿秸灵＞玉米秸秆+沼液＞小麦秸秆+绿秸灵＞小麦秸秆+沼液＞玉米秸秆CK＞小麦秸秆CK,各处理间的差异达到显著水平,其中采用绿秸灵预处理秸秆的产气效果优于用沼液预处理的效果.在采用相同的预处理前提下,玉米秸秆的干物质产气率(TS产气率)及甲烷产气率(TSCH4产气率)均大于小麦秸秆的干物质产气率(TS产气率),表明玉米秸秆比小麦秸秆更适宜于沼气发酵.