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针对浊度为2~4 NTU的原水,以氯化铁为絮凝剂确定了絮凝反应的最佳pH和氯化铁最佳投加量,并比较了高岭土、硅藻土和聚丙烯酰胺(PAM)的助凝效果。研究结果表明:pH在8.0时有较好的絮凝效果,氯化铁最佳投加量为3.2~3.8 mg/L;高岭土最佳投加范围3~4 mg/L,浊度去除率可达75.1%;硅藻土最佳投加量为2 mg/L,浊度去除率可达75.7%;PAM最佳投加量为0.2 mg/L,浊度去除率可达87.1%。采用PAM助凝效果最好,可有效提高混凝沉淀效果。
For the raw water with turbidity of 2 ~ 4 NTU, the optimum pH of flocculation reaction and the optimal dosage of ferric chloride were determined by using ferric chloride as flocculant. The contents of kaolinite, diatomite and polyacrylamide (PAM) ) To help coagulation effect. The results showed that the best flocculation effect was obtained when the pH was 8.0, the optimum dosage of ferric chloride was 3.2-3.8 mg / L, the best dosage range of kaolin was 3-4 mg / L, the turbidity removal rate was up to 75.1%. The optimal dosage of diatomite was 2 mg / L, the turbidity removal rate was up to 75.7%, the best dosage of PAM was 0.2 mg / L and turbidity removal rate was 87.1%. PAM coagulation using the best, can effectively improve the coagulation and sedimentation results.