生物接触氧化工艺用于分散型污水处理的中试

Pilot-scale Test of Biological Contact Oxidation Process for Decentralized Wastewater Treatment

为解决珠江三角洲地区农村高速城市化带来的污水分散处理问题,采用软性填料的两段式生物接触氧化反应器进行了处理生活污水的中试研究。在设计流速下启动反应器,采用连续培养的方式进行挂膜,并在设计水力负荷和曝气强度下考察了反应器的除污性能,结果表明,两段式生物接触氧化反应器对SS、COD、TP、NH3-N和BOD5的平均去除率分别为92.5%、81%、25.7%、76.8%、90.3%,出水水质达到《城市污水再生利用城市杂用水水质》(GB/T 18920—2002)的要求,可回用于浇洒绿地。

In order to solve the decentralized wastewater treatment problem due to speedily urbanizing Pearl River Delta rural region, a two-stage biological contact oxidation reactor with flexible medium was used in the pilot-scale test for treating domestic wastewater. The reactor was started at the design wastewater flowrate, the biofilm was formed in a continuous culture mode, and the pollutant removal performance of the reactor at the design hydraulic loading and aeration intensity was investigated. The results show that the average removal efficiencies of SS, COD, TP, NH3 - N and BOD5 are 92.5%, 81%, 25.7%, 76.8% and 90.3% in the two-stage biological contact oxidation reactor. The effluent quality meets the requirements of the Reuse of Urban Recycling Water - Water Quality Standard for Urban Miscellaneous Water Consumption （GB/T 18920- 2002）. It can be reused to virescence.