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为有效利用农业生物质资源,以蓖麻秸秆为发酵原料,在恒温30℃条件下,探究直接用原料进行干发酵与用2%的氨水对原料进行预处理后再干发酵两种情况下的产气差异.实验结果表明,前者与后者的发酵周期分别为77d和67d,TS产气潜力分别为205mL/g和281 mL/g,VS产气潜力分别为213mL/g和292 mL/g,且直接发酵过程易出现酸化现象.可见,以蓖麻秸秆为原料进行干发酵产沼气是可行的,启动前用一定量的稀氨水预处理不仅可以提高产气潜力,还可避免酸化现象.
In order to effectively use agricultural biomass resources, castor straw as raw material for fermentation, at a constant temperature of 30 ℃ to explore the direct use of raw materials for dry fermentation and raw materials with 2% ammonia pretreatment and then dry fermentation in both cases The results showed that the fermentation cycles of the former and the latter were 77d and 67d, respectively, and the TS gas production potentials were 205mL / g and 281mL / g, respectively. The gas production potentials of VS were 213mL / g and 292mL / g, respectively , And the acidification is easy to occur in the direct fermentation process. It can be seen that biogas production by dry fermentation of castor straw is feasible. Pre-treatment with a certain amount of diluted ammonia can not only increase the gas production potential but also prevent acidification.