Undigested dewatered domestic sewage sludge from secondary treatment plant contained N 4.12%, of which organic form of N accounted for 93%.

未经消化的二级生活污水处理厂脱水污泥含氮4.12%，其中有机态氮占93%。

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Treating combined sewage effluent from a secondary treatment plant, the process achieved 94.5% cadmium removal for the trace quantities present .

用这种方法处理二级处理厂排出的综合下水，可除去水中含镉量的94.5。

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Results shows that, start-up by seeding activated sludge from a secondary treatment plant has no beneficial effects. On the contrary, the start-up period are detained.

对常用的三种挂膜方式进行了对比试验，结果发现，采用二级处理回流污泥进行接种对好气滤池的启动没有明显促进作用；

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