A^2/O淹没式生物膜工艺处理城镇污水的研究

THE STUDY OF THE TREATMENT OF TOWN SEWAGE BY A^2/O SUBMERGED BIOFILM PROCESS

山东省东阿县污水处理厂一期工程采用厌氧-缺氧-淹没式生物膜法(A2/O)工艺处理城镇污水。COD平均去除率为93.8%,出水平均COD为22.7 mg.L-1;NH3-N和PO43--P平均去除率为97.6%和76.0%,出水平均质量浓度为0.87、0.78 mg.L-1,出水满足城镇污水处理厂污染物排放标准(GB 18918-2002)一级A标准。研究还发现厌氧池中存在厌氧氨氧化反硝化协同反应,NH3-N、NO3--N平均去除量分别为2.43、4.11 mg.L-1。

The Donge Wastewater Treatment Plant in Shandong adopted anaerobic-anoxic-submerged biofilm（A2/O）process in the first project to treat municipal wastewater.The average removal rate of COD,NH3-N and PO43——P were 93.8%,97.6% and 76.0%,respectively;the average effluent concentrations were 22.7,0.87 and 0.78 mg·L-1,respectively,the effluent quality of A2/O process can reach the first（A） standard of municipal sewage treatment plant pollutants discharge standards（GB 18918-2002）.The research also showed that the ANAMMOX-denitrification reaction occurs in anaerobic pond,which removes 2.43 mg·L-1 ammonia nitrogen and 4.11 mg·L-1 nitrate nitrogen respectively.