硅藻精土与PAC深度处理城市污水的对比试验研究

以某污水厂二沉池出水为原水,通过混凝试验,研究了硅藻精土与聚合氯化铝(PAC)在不同投加量和pH值下去除TP与NH3-N的效果.试验结果表明,二者最佳投加量分别为30和40mg/L,最佳pH值分别为7和8.在此条件下,二者对TP的去除率分别可达76.5%和80.7%,对NH3-N的去除率分别可达40.8%和26.2%,...

Comparative test on advanced treatment of urban sewage by diatomite and PAC

Taking the secondary sedimentation tank effluent of a sewage treatment plant as the research object,the effects of diatomite and PAC dosage on TP and NH3-N removal under different pH conditions were studied.The results of the test showed that,the optimal condition for the above two coagulants treating the said kind of wastewater was: the dosage of diatomite and PAC were 30 and 40 mg/L respectively;the pH values were 7 and 8 respectively.Under the optimal condition,the removal rates of TP by the said two coagulants reached 76.5% and 80.7% respectively;the removal rates of NH3-N reached 40.8% and 26.2% respectively.The mass concentrations of TP and NH3-N in the effluent water both met the first grade A standard of GB 18918—2002 Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant.