折流淹没式生化池工艺改造工程实践

Practice of reconstruction of submerged biochemical tank process renovation project

折流淹没式生化池(DEST)工艺曾在湖南等地中小型污水处理厂得到广泛应用,但运行多年后暴露出一些问题。根据工艺运行情况及池体特点提出改造方案。以湖南省某污水处理厂为例,通过采用AAO工艺对DEST生物池改造,实现了生化系统稳定运行,出水稳定达到《城镇污水处理厂污染物排放标准》一级A标准。

The baffied submerged biofilm process was widely used in small and medium wastewater treatment plants in Hu’nan province and other places.But after running for many years,some pioblems were exposed.Proposed a modification plan according to the current status of the process and the characteristics of the tank.Taking a wastewater treatment plant in Hu′nan province as an example,through the modification of DEST tank using AAO process,the operation of the biochemical system has gained stability and effluent compliance has been achieved the first class A level of Discharge standard of pollutants for municipal wastewater treatment plant.