污水输送和污水处理过程中CH_4产生与排放特征及影响因素研究进展

Research progress on methane emission character and influencing factors in wastewater feeding and treatment process

污水输送和污水处理过程中会有大量的CH4温室气体产生和排放。总结了污水厌氧生化处理过程中CH4产生的机制,列举了产甲烷菌的种类。同时,分析了在污水生化处理各单元CH4产生与排放的影响因素:污水处理过程中,DO、pH、温度、污泥负荷、硝酸盐浓度和亚硝酸盐浓度等因素会影响CH4的产生。在污水处理过程中的厌氧段,CH4的排放主要是与CH4产生量及CH4在污水中的溶解度有关;在好氧段,CH4的排放与机械搅拌或曝气作用对水流的扰动有关。

Lots of green house gas（CH4） was produced and emitted in the sewage feeding and treatment processes of waster treatment plant（WWTP）.This work summarized the mechanism of CH4 production in wastewater anaerobic treatment and listed out kinds of methanogens.Simultaneous,the influence factors of CH4 production and emission were also discussed.In the sewage treatment process,the CH4 production was related with DO,pH,temperature,sludge loading rate,nitrite/nitrate concentration etc.;CH4 emissions quantity in the non-aerated units was determined by CH4 production and CH4 solubility,while in the aerated units,the CH4 emissions quantity was determined by wastewater disturbance caused by mechanical stirring or aeration.