作者系统地分析了直接回收滤池反冲洗水对絮凝、沉淀和过滤工艺的影响；
The effects of direct filter backwash water recovery on the flocculation, sedimentation and filtration processes are studied.
平流沉淀池的最佳排泥周期为1小时，滤池过滤周期为24小时。
The cycle of sludge discharged out of horizontal sedimentation tank is 1 hour. The cycle of the filter tank is 24 hours.
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