城市污水处理厂出水的化学需氧量和悬浮物的相关关系以及悬浮物测定方法探讨

Correlation of COD and SS at Outlet in Urban Sewage Treatment Plant and Study on SS Measurement

以活性污泥法为基础的二级生化处理工艺是城市污水处理的基本方法,其出水的化学需氧量值(CODCr)不仅大于悬浮物(SS)值,而且两者之间还存在着一致性的相关关系。本文对这种关系作了相应探讨。同时对悬浮物的测定方法进行了探讨,提出了悬浮物的表示由可沉固体+透明度的概念。

The activated sludge process is the basic method for secondary biochemical sewage treatment plant. Among the treated sewage quality indices, chemical oxygen demand (CODCr) should be not only bigger than suspended solids(SS) but also there is correlation between them. This article discusses this relation as well as the measuring method of SS. It is put forward that the SS might be made up of two parts,namely solid of granules and turbidity of colloids.