【摘要】 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-1VS,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。更多还原

【Abstract】 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 accu- mulation during anaerobic digestion process. The results of the accumulation efficiency of NO3-N showed that swine feces improved the accu- mulation of NO3-N, increasing by 34.53% compared to rice straw alone, it was efficient to increase the fertilizer value of anaerobically digested effluent.更多还原