secondary sewage sludge的意思|示意

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。

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%。

Sewage treatment plants yield lots of sewage sludge. The sludge has complex composition, containing a variety of bacteria, and then the improper disposal is bound to cause secondary pollution.

来自污水处理厂的污泥产量大，成分复杂，含有多种病菌，处置不当势必造成二次污染。

The sludge from city sewage plant contains enormous microorganism, some of them are pathogenic bacteria, which will cause secondary pollution if notsuitably treated.

城市污水处理场的底泥含有大量的微生物，其中包括一些病原菌，如果不加处理会给环境造成再次污染。