基于厌氧污泥接种的预处理工艺对分户厕所废水亚硝化反应启动的影响

采用分户处理的方式对厕所废水进行单独处理是迅速改善乡村地区生活卫生条件的捷径。部分亚硝化-厌氧氨氧化方法的出现为分户厕所废水的处理提供了更为可持续的工艺选项。亚硝化反应是厌氧氨氧化反应的先决性步骤。以分户厕所废水为处理对象，在不接种亚硝化污泥的前提下，考察了在厕所废水预处理单元接种厌氧污泥对亚硝化反应启动的影响。结果表明，厌氧污泥的接种可将亚硝化反应的启动周期缩短至正常周期的50%，其作用机理位削弱了异养细菌对氨氧化细菌的竞争性抑制。以上研究结果可为分户厕所废水部分亚硝化反应的快速启动提供参考。

Effect of pretreatment based on anaerobic sludge inoculation on the initiation of partial nitritation for household toilet wastewater treatment

Household toilet wastewater treatment (HTWT) is a shortcut for improving the sanitary condition in developing rural areas. Partial nitritation anaerobic ammonia oxidation (PNAMX) provides a more economical and sustainable option for HTWT. Partial nitritation is a prerequisite step in PNAMX. In this study, the effect of anaerobic sludge inoculation in the pretreatment unit of toilet wastewater on the partial nitritation initiation (PNI) was investigated. The results showed that this strategy could almost save a half of PNI time comparing with the control reaction system. The mechanism of the anaerobic sludge inoculation is to attenuate the competitive inhibition of heterotrophic bacteria against ammonium oxidizing bacteria in the aerobic reaction section. This study can provide a strategy to the fast initiation of partial nitritation reaction in household toilet wastewater.