Phosphorus removal from effluent of AB process sewage treatment plant by ferric chloride
氯化铁处理AB工艺二级出水中的磷

Ferric coagulant has been applied in wastewater treatment because of its high charge and safety.In this paper,it was investigated that the characteristics of ferric chloride(FeCl3) on phosphorus removal from the secondary effluent of AB process municipal wastewater treatment plant.The effect of coagulant dosage,pH and other factors on phosphorus removal was studied.The results showed that when the pH value of water was not adjusted,by increasing the FeCl3 dosage to 75 mg/L,the total phosphorus of effluent was reduced from 4.95 mg/L to 0.44 mg/L.The TP concentration of the treated effluent could meet the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB18918-2002)(TP <0.50 mg/L).