氧化塘-潜流湿地处理低污染河水中试工程

A PILOT PROJECT TO TREAT SLIGHTLY POLLUTED RIVER WATER BY OXIDATION POND-SUBSURFACE CONSTRUCFED WETLAND COMBINED SYSTEM

以昆明市新运粮河工程示范区的间歇进水、连续出水氧化塘-水平潜流人工湿地复合系统为研究对象,探讨了该中试系统处理城市暖季与寒季低污染河水的运行状况,结果表明,间歇进水、连续出水塘-湿地复合系统可以有效处理暖季与寒季低污染河水,暖季各污染物的去除率平均分别为COD 73.8%、TP 78.9%、TN 64.4%、NH4+-N75.1%,寒季各污染物的去除率平均分别为COD 64.6%、TP 72.8%、TN 40.1%、NH4+-N 56.6%。系统出水均达到城镇污水处理厂污染物排放标准(GB 18918-2002)的一级A标准,可作为城镇景观用水和一般回用水。

The ecological treatment system consisting of oxidation pond and sub-surface horizontal flow constructed wetland was studied in Kunming. This pilot system was used to treat urban slightly polluted river water and the operation of it was discussed. The results showed that the system can treat slightly polluted river water efficiently in both warm and cold seasons and realized the function of pollution abatement and environmental beautifi- cation. The average removal rates of COD, TP, TN and NH4＋-N in the system for warm season were 73.8%, 78.9%, 64.4%, 75.1% respectively, and for cold season were COD 64.6%, TP 72.8%, TN 40.1%,NH4＋-N 56.6%. The treated water met the standard A of grade I dischargo standard of pollutants for municipal waste water treatment plant and so could be reused as greening water and other general reuse water.