According to the water turbidity after the sedimentation, the paper researches the hydraulic condition factors which influence the coag- ulation effect of the polymeric aluminum ferric chloride, finds the coagulation effect is better when the mixing intensity is 100 s -1 - 170 s -1 with the 1 minute around mixing time, while the influence of the flocculation time and the flocculation intensity on the coagulation effect is mutually restrictive.%通过沉淀后水浊度,研究了影响聚合氯化铝铁混凝效果的水力条件因素,发现：混合强度为100 s-1～170 s-1及1 min左右的混合时间时,混凝效果较好;而絮凝时间和絮凝强度对混凝效果的影响相互制约。
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