Abstract:
The performances of aluminum sulfate, ferric chloride and poly-aluminum chloride in the removal of turbidity and organic substance are compared by jar test, and the optimum pH of coagulation is also studied.The results indicate that in the case of Songhuajiang water with low temperature and turbidity, the coagulation of aluminum sulfate in combination with activated silica is better than that of ferric chloride or poly-aluminum chloride.The optimum pH for coagulation is 6.0 ～ 7.0.Under optimal coagulating conditions, coagulation with ferric chloride is the best.It can also be seen that it' s efficient to evaluate and choose coagulants with respect to turbidity and organic substance removal for increasing pollutant removal efficiency in coagulation and sedimentation.
Key words:
water treatment,
coagulant,
optimization
摘要：
通过烧杯试验,比较了硫酸铝、三氯化铁、聚合氯化铝的除浊和除有机物性能,同时探讨了混凝的最佳pH值。结果表明,对于低温低浊的松花江水而言,硫酸铝配合投加活化硅酸的混凝效果优于三氯化铁和聚合铝;混凝的最佳pH值介于 6.0～ 7.0;在最佳的混凝条件下,三氯化铁的混凝效果最优。另外发现,兼顾除浊和除有机物的效果评价和优选混凝剂,是提高混凝沉淀工艺除污染效率的有效途径之一。
关键词:
水处理,
混凝剂,
优化选择
CLC Number:
SHI Mingyan, CUI Fuyi, ZHANG Hailong, SUN Shouzhi. Optimization of coagulants in the treatment of polluted water with low temperature and turbidity[J]. INDUSTRIAL WATER TREATMENT, 2002, 22(10): 29-31.
石明岩, 崔福义, 张海龙, 孙寿芝. 低温低浊受污染水处理中混凝剂的优化选择[J]. 工业水处理, 2002, 22(10): 29-31.