Abstract:

The efficiency of the removal of phosphorus from the 2nd-class effluent of municipal sewage plant has been studied by using coagulants such as polyaluminium ferric chloride （PAFC） and polyaluminium chloride（PAC） respectively. The results show that PAFC has better effect on the removal rates of phosphorus and turbidity than PAC. The best dosages of PAFC and PAC are 80 mg/L and 120 mg/L. The corresponding residual concentrations of phosphorus in effluent are 0.07 mg/L and 0.08 mg/L respectively， and the removal rates are 92.7% and 91.6% respectively. In the meantime PAFC could reduce the ζ potential and improve the reaction efficiency more quickly than PAC through the measuration study of ζ potential.

Key words: recycled water, polyaluminium ferric chloride, phosphorus, coagulation

摘要：

研究了聚合氯化铝铁(PAFC)与聚合氯化铝(PAC)两种混凝剂对城市污水厂二级出水的除磷效果。结果表明:PAFC比PAC具有更好的除磷、除浊效果,PAFC与PAC的最佳投药量分别为80、120 mg/L,对应的剩余磷质量浓度分别为0.07、0.08 mg/L,去除率分别为92.7%、91.6%;同时通过ζ电位的测定研究表明,PAFC比PAC能够更快地降低废水的ζ电位,提高反应效果。

关键词: 再生水, 聚合氯化铝铁, 磷, 混凝

CLC Number: 

• X703.1