生态基泛氧化塘工艺对城市河道污水的净化效果

Purification Efficiency of Urban Riverway Sewage by Eco-base Pan-oxidation Pond

在长春市的永春河附近建设了处理规模为200 m3/d的泛氧化塘,其悬挂阿科蔓生态基填料,利用泛氧化塘生物膜系统实现对污水的净化。采用该系统处理城市污水厂一级B标准排水和永春河城市点源污水的混合水,考察了挂膜启动过程中生物相的变化及对COD、氨氮的去除效果。当生态基填料对COD的去除率稳定在60%左右、对氨氮的去除率稳定在90%左右时可认为系统挂膜成功,此过程历时约31 d。探讨了挂膜完成后处理河道混合水时,pH值、溶解氧、COD、氨氮、硝态氮、亚硝态氮及总磷等沿水流方向的变化。结果表明,各指标在泛氧化塘中均得到了很好的去除,此研究成果为长春市河道生态环境治理提供了科学依据。

Pan-oxidation pond with capacity of 200 m3/d was built near Yongehun River in Changchun City, which uses AquaMats eco-base carrier and biofilm system to treat the mixed water of I -class B standard drainage from municipal sewage treatment plants and drainage from Yongchun River urban point sources. The changes of biofaeies and the treatment efficiencies of COD and NH4＋ - N in the process of biofilm formation were investigated. When the removal rates of COD and NH4 - N stabilize at about 60% and 90%, the biofilm is formed successfully. The whole process lasts about 31 d. Meanwhile, the changes of pH, DO, COD, NH4 - N, NO3- - N, NO2 - N, TP and other components along the flow direction when treating the mixed water after the biofilm formation are discussed. The results show that all the indexes are removed effectively in the pan-oxidation pond, and the research results provide a scientific basis for the environmental treatment of riverways in Changchun City.