In view of the characteristics of the influent water of a sewage treatment plant such as:large fluctuation of water quantity,high NH3-N concentration,low COD concentration and so on,a fixed bed plate filler was added to the biochemical pond in A2/O process to enhance the treatment effect.The experimental re-sults showed that,the wastewater treatment plant with fixed bed plate filler added to the biochemical pond in A2/O process can maintain a stable COD and NH3-N removal rates of about 90%and 95%respectively.The effluent water quality met the requirement of level A grade 1 in GB 3838-2002 Environmental quality standards for surface water.
关键词
强化/二级处理/固定床平板填料/A2/O工艺/生化池/生物膜/脱氮性能
Key words
enhancement/secondary treatment/fixed bed plate filler/A2/O process/biochemical pond/biomembrane/denitrification performance