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。

Presently, active sludge method, or the establishment of secondary sewage treatment plants has been mainly adopted to treat urban sewage.

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二级污水处理厂二沉池漂泥有反硝化漂泥、活性污泥老化漂泥、生物泡沫导致的漂泥。

There were anti-nitrification floating sludge, aged activated floating sludge and floating sludge from biological foam in the final settling basin of municipal second stage sewage treatment plant.

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本文对炼油厂含油污水处理厂增设二级浮选的点位设在曝气池之后并采用JHX多级射流浮选罐可行性进行了论证和分析。

We use JHX multilevel jet floatation pot as secondary floatation point after aeration pond in oil containing sewage farm of refinery. This paper discusses the feasibility of this method.

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