稻草与猪粪混合厌氧消化特性研究

在中温条件下（35℃），研究了稻草中添加猪粪对厌氧消化过程的影响，分析了消化过程中日产气量、累积产气量、甲烷含量、pH、挥发性脂肪酸以及硝态氮和氨态氮的变化。结果表明，将猪粪与稻草混合厌氧消化产沼气可以顺利进行，混合物的Vs产气量为330．14L·kg^-1 VS，沼气中甲烷含量为62．88％，添加猪粪对稻草产气量和有机酸的影响不明显，但对发酵过程中可能出现的酸积累有一定的缓冲作用。添加猪粪可以大幅提高发酵液中NO3-N含量，较稻草的处理提高34．53％，对提高消化液的肥料价值有重要意义。因此，将稻草与猪粪混合厌氧消化产沼气是完全可行的。

Anaerobic Co-digestion of Rice Straw and Swine Feces

Under mesophilic condition （35℃）, a bench-scale experiment based on anaerobic co-digestion process of rice straw and swine feces was conducted in a fed-batch single phase reactor. Changes of daily biogas production, cumulative biogas production, methane content, pH, VFAs, NO3-N and NH3-N during digestion process were studied. The results indicated that the anaerobic digestion of rice straw could successfully progress when swine feces was added, 330.14 L of biogas production per kg VS added was obtained and the average methane content was up to 62.88%. The cumulative biogas production, removal of VFAs and TOC were not significant, but it is buffering to acid accumulation during anaerobic digestion process. The results of the accumulation efficiency of NO3-N showed that swine feces improved the accumulation of NO3-N, increasing by 34.53% compared to rice straw alone, it was efficient to increase the fertilizer value of anaerobically digested effluent.