二级处理(secondary treatment)，是指污水经一级处理后，用生物处理方法继续除去污水中胶体和溶解性有机物的净化过程。
... secondary circuit二次电路，次级电路 secondary treatment二级处理；次级处理 secondary voltage二次电压 ...
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废水的二级处理 secondary treatment
二级处理过程 secondary treatment process
污水二级处理 secondary treatrtaent of sewage
废水二级处理 secondary wastewater treatment
需氧二级处理 aerobic secondary treatment
二级氧化处理 second stage oxidation treatment ; secondary oxidation treatment
二级强化处理 upgraded secondary treatment
废水的二级生物处理 secondary biological treatment
二级污水处理 secondary sewage treatment
城市污水经一级或二级处理后，水中仍含有大量细菌。
After wastewater was treated at wastewater treatment plant, it still contained lots of bacteria.
一些二级处理工厂可以脱去已测到的生化需氧量的90%。
Good secondary treatment plants remove 90 percent of measured BOD.
在对工业废水二级处理基础上，寻求最佳的深度处理工艺。
On the basis of the secondary treatment of industrial wastewater, an optimum advanced treatment technology is searched for.
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