复合式MUCT工艺用于城市污水除磷脱氮的研究

采用复合式MUCT工艺在天津某城市污水处理厂进行试验研究,重点考察了该工艺在不同泥龄条件下的脱氮除磷效果。试验结果表明,投加组合填料可以强化系统的硝化性能。在一定范围内,泥龄的降低有利于提高系统除磷效果。当泥龄为8 d时,出水NH3-N、TP的平均质量浓度分别为5.1、0.8 mg/L,TN的质量浓度小于20 mg/L;当泥龄为6 d时,出水NH3-N的平均质量浓度为7.7 mg/L,达到《城镇污水处理厂污染物排放标准》(GB18918-2002)的一级A标准。

Removing nitrogen and phosphorus from urban wastewater using composite MUCT process

An Experiment was studied on the composite MUCT process used in a municipal wastewater treatment plant in Tianjin,the effects of the said process on nitrogen and phosphorus removal under different SRT conditions were primarily investigated.The results showed that,adding combined packing could enhance the nitrific-ation performance of the system,and reducing sludge age to some extent was propitious to improve the phosphorus removal efficiency.When the sludge age was 8 d,the mass concentration of effluent NH3-N,TP were 5.1,0.8 mg/L in average respectively,and the mass concentration of effluent TN was lower than 20 mg/L;when the sludge age was 6 d,the mass concentration of effluent NH3-N was 7.7 mg/L in average,which met the A grade of the first level in the national discharge standard of pollutants for municipal wastewater treatment plant(GB18918-2002).