不同混凝剂除磷效果的研究

Research on phosphorus removal by different coagulants

通过烧杯试验,分别对聚合氯化铝(PAC),硫酸铝(Al2(SO4)3.18H2O),硫酸亚铁(FeSO4.7H2O)和氯化铁(FeCl3.6H2O)的除磷效果进行了研究,并协同考察了去除污水中SS和CODCr的情况。结果表明:在投加量为80mg/L时,4种混凝剂对TP的去除率按由高到低顺序是FeCl3.6H2O>Al2(SO4)3.18H2O>FeSO4.7H2O>PAC;TP、SS和CODCr的的去除率均随着药剂投加量的增加而提高。

The pely aluminum chloride （PAC）, aluminum sulfate （ Al2 （ SO4 ）3 ·18H2O ）, ferrous sulfate （FeSO4 ·7H2O） and ferric chloride（FeCl3 ·6H2O） were chosen as coagulants, the phosphorus removal effect for municipal wastewater by beaker test were carried out. The removal of suspended solids （SS） and chemical oxygen demand（CODcr） were also compared. The results show that, when the dosage was 80mg/ L, the removal of TP by four kinds of coagulants from high to low was FeCl3 ·6H2O 〉 Al2（SO4）3· 18H2O 〉 FeSO4 ·7H2O 〉 PAC; the removal of TP, SS and CODcr were increased with coagulant dosage.