【摘要】 人粪与秸秆产量巨大，但是缺乏有效的处置方式，对环境产生巨大危害。为深入研究碳氮比对人粪与秸秆混合厌氧发酵实验的影响，该文采用人粪分别与沼液浸泡过的玉米秸秆、小麦秸秆在碳氮比为20/1、25/1及30/1三个梯度下进行混合厌氧发酵实验，分析了实验过程中产气量以及沼液的p H、NH4+-N、VFAs以及COD的变化。结果表明，不同实验组各指标变化趋势类似，产气性能方面，碳氮比为20/1的实验组产气量较优，人粪与玉米秸秆混合发酵比人粪与小麦秸秆混合发酵更优；发酵料液特性方面，碳氮比为20/1的实验组发酵料液指标变化较为温和，发酵过程更稳定，缓冲能力较高，人粪与小麦秸秆混合厌氧发酵的实验组比人粪与玉米秸秆混合厌氧发酵更具有缓冲能力，发酵过程更稳定。碳氮比为20/1更适宜人粪与秸秆进行混合厌氧发酵实验。更多还原

【Abstract】 Human manure and straw production is huge, and the lack of effective treatment and disposal methods would cause pollution to the environment. In order to further study the effect of carbon to nitrogen ratio on the anaerobic co-digestion experiment by mixing human manure with straw in rural Hebei Province, the anaerobic co-digestion experiment of corn straw and wheat straw soaked in human manure and biogas slurry was carried out under three gradients of carbon to nitrogen ratio of 20/1, 25/1 and 30/1, respectively. The changes of gas content and pH, NH4+-N, VFAs and COD of biogas slurry during the experiment were analyzed. In terms of gas production performance, the experimental group with a carbon to nitrogen ratio of 20/1 had better gas production. The fermentation of human manure with corn straw was better than that of human manure with wheat straw. In terms of fermentation feed and liquid characteristics, the experimental group with a carbon to nitrogen ratio of 20/1 had moderate changes in fermentation feed and liquid indexes, more stable fermentation process and higher buffering capacity. The experimental group with human manure and wheat straw mixed anaerobic co-digestion had more buffering capacity and more stable fermentation process than the experimental group with human manure and corn straw mixed anaerobic co-digestion. Therefore, the carbon to nitrogen ratio of 20/1 is more suitable for human manure and straw mixed anaerobic co-digestion experiment.更多还原