The optimal operation condition to treat the raw water by sludge return method in various levels of turbidity has been found.
通过试验研究，找出了不同原水浊度情况下污泥回流的最佳运行工况。
Backwash water is either discharged to the sew or settled with the supernatant return to the front of the plant and the sludge treated in some acceptable manner.
反冲洗水排放到下水道或者沉淀，沉淀上清夜回到水厂前区且泥以某种可以接受的方式处理。
The return flights can also be made use of to collect some things like floating sludge, rubbish and oil slick on the water surface.
并可利用在水面上的回程刮板收集漂浮在水面上的浮渣、垃圾及浮油等。
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