预处理方式对水稻秸秆厌氧发酵产气特性的影响

Effect of Pretreatment Methods on Anaerobic Fermentation Characteristics from Rice Straw

在中温(35℃)条件下,分析了不同预处理方式对水稻秸秆厌氧发酵过程中产气特性的影响,比较了厌氧发酵前、后水稻秸秆组分变化的情况,结果表明:氨化预处理的秸秆产气量最大,VS(挥发性固体)产气量达到356.80 mL/g,比对照组高11.70%;各组甲烷质量分数的最大值均达到了70%以上,甲烷含量差异不显著;水稻秸秆厌氧发酵后的木质纤维素含量均呈现下降的趋势,木质纤维素的降解率与产气量成正比,氨化后的水稻秸秆与原水稻秸秆相比,纤维素、半纤维素和木质素的降解率分别为28.49%、51.73%和7.13%。

Under mesophilic temperature （35℃）, the component changes of rice straw before and after anaerobic fermentation were compared. Results show that gas production of amination pretreatment straw is the largest, and VS gas production is 356.80 mL/g, 11.70% higher than the control group; the maximum of methane is achieved 700/0 above, which shows no significant difference between each group. Lignocellulose content presented down trend after anaerobic fermentation, and degradation rate is proportional to the gas production. Compared with the original rice straw, cellulose, hemieellulose and lignin degradation rates of amination pretreatment straw are 28.49% , 51.73% and 7.13% respectively.