天然沸石/活性炭处理污水厂尾水试验研究

Experimental Study on Treatment of Tailwater From Sewage Plant by Natural Zeolite/Activated Carbon

采用活性炭和天然沸石对污水厂尾水进行深度处理,研究了两种填料对于尾水中主要污染指标COD、TP、NH_3-N不同的去除效果。在污水厂尾水5mg/L的NH_3-N浓度下,采用天然沸石处理,去除率超过90%。80 mg/L的COD浓度下采用活性炭处理,去除率超过85%。两种填料对于TP的去除效果均不高。在深度处理过程中可以采用先投加混凝剂的方式去除TP,天然沸石和活性炭连用的方式,有效达到将尾水从污水排放一级A标准的水质提高至地表水Ⅳ类水标准。

Activated carbon and natural zeolite were used to treat the tailwater of sewage plant, and the different removal effect of two kinds of fillers on the main pollution indexes COD,TP and NH3-N in the tail water were studied. Under the NH3-N concentration of 5mg/L in the tail water of the sewage treatment plant, the removal rate of NH3-N by natural zeolite was more than 90%. The tail water with 80 mg/L COD concentration was treated with activated carbon, and the removal rate was over 85%. The effect of the two kinds of fillers on the removal of TP was not high. In the process of depth treatment, TP can he removed by adding coagulant, and natural zeolite and activated carbon can be used to improve the water quality of the tail water from the first A standard of sewage discharge to the type IV water Standard of the surface water.