间歇曝气氧化沟工艺处理城市污水实验

为了提高氧化沟工艺对城市污水的脱氮能力,对设置缺氧池和厌氧池的氧化沟工艺采用了鼓风曝气和水下搅拌的曝气方式和连续流间歇曝气的运行方式。研究结果表明:间歇鼓风曝气的运行方式能够提高氧化沟系统的脱氮率,可达43.29%~62.35%;同时提高了系统的脱磷效率,脱磷率达40.23%~76.67%;而曝气能耗比同等条件转刷曝气的能耗降低42.86%~57.14%。

EXPERIMENT ON TREATMENT OF URBAN SEWAGE BY OXIDATION DITCH WITH INTERMITTENT AERATION

In order to improve the nitrogen removal efficiency of urban sewage, an oxidation ditch with selector and anaerobic tank is studied. During the study, the aeration and agitation are separated, and continuous flow and intermittent aeration are carried out. In the experiment, the nitrogen and phosphorus removal efficiency of oxidation ditch was improved by intermittent aeration. The nitrogen and phosphorus removal efficiency was 43.29 %～62.35 % and 40.23 %～76.67 % in the different intermittent aeration mode. Comparing with the exterior aeration system, the 42.86%～57.14% energy was saved in the ventilator aeration system.