... urban sewage pipeline 城市污水管网 secondary urban sewage 二级城市污水 urban sewage treatment 城市污水处理 ...
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Presently, active sludge method, or the establishment of secondary sewage treatment plants has been mainly adopted to treat urban sewage.
目前，对城市污水的处理主要采用活性污泥法即兴建城市二级污水处理厂。
The secondary treating water from urban domestic sewage treatment plant was treated by fine membrane with the way of periodic counter-flow static type.
本研究对城市生活污水处理厂二次处理水，采用周期逆洗型静态过滤方式进行了精密膜过滤。
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