脉冲通气对污水管道内有害气体的控制

为控制污水管道产生的有害气体对管道设施和周围环境造成的不利影响，通过搭建带有搅拌的反应器系统，来模拟实际污水管道，探究脉冲通气对污水管道内有害气体的控制效果及生物群落变化的影响。研究表明：脉冲通气能有效控制有害气体的产生，在水流速度为0.2 m·s⁻¹时，硫化氢(H₂S)、甲烷(CH₄)、一氧化碳(CO)的抑效果最好，其抑制率分别为98.7%，44.4%，92.5%；在脉冲通气作用下，古菌群落的生物多样性不断减少，细菌群落的生物多样性不断增加；同时，脉冲通气也改变了生物群落结构，其群落结构变化与气相参数的变化是相一致的。

Control of harmful gases in sewer systems by pulse ventilation

In order to control the adverse effect of the harmful gas produced by sewer systems on pipeline facilities and the surrounding environment, a reactor system with stirring was built to simulate the actual sewer systems and explore the control effect of pulse ventilation on the harmful gas in the sewer systems and the influence of biological community change. The results show that pulse ventilation could effectively control the production of harmful gases. At the water flow speed of 0.2 m·s−1, the best inhibitory effects occurred for hydrogen sulfide (H2S), methane (CH4) and carbon monoxide (CO) and their inhibitory rates were 98.7%, 44.4% and 92.5%, respectively. Under the action of pulse ventilation, the biodiversity of archaea community decreased continuously, while that of bacterial community increased continuously. At the same time, the structure of biological community also changed through pulse ventilation, which was consistent with the change of gas phase parameters.