Sludge liquor is recirculated in the secondary system to assure its purity before discharge.

该泥水回流到二级处理系统，以保证排放前的澄清度。

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With the water pollution becoming more and more serious, waterworks sludge treatment project has been added up to drinking water treatment system in order to achieve the zero discharge of waste water.

在当前水环境污染日益严重的情况下，自来水厂排泥水处理工程已逐步纳入了自来水厂的工艺流程体系，以实现生产废水零排放。

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The design of tank structure, washing water system, aeration system and sludge discharge system are described , and the advances and attentions in application of this process are reviewed.

结合该厂水质、水量特点，分析了UNITANK工艺的池型、冲洗水系统、 曝气系统、污泥排放系统的选择与设计，并总结了该工艺的优点及应用中的注意事项。

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