北方某污水厂CASS工艺升级改造设计

以北方某污水处理厂升级改造工程为例,介绍了CASS反应池改造方案及实施效果,改造措施包括优化运行周期,新增缺氧区及MBBR区,增加内回流及碳源投加设施。反应池出水各指标优于《城镇污水处理厂污染物排放标准》(GB18918—2002)的一级A标准。工程总投资为20286万元,升级改造新增运行成本0.201元/m^3。升级改造方案具有不停产施工、总氮去除率高、降低污水厂运行成本的特点,可为北方污水处理厂的升级改造提供借鉴。

Design of Upgrading Project of CASS Process in a Sewage Treatment Plant in Northern China

Taking a sewage treatment plant in northern China as an example, the upgrading project and implementation results of CASS process were introduced, which included optimizing the operation cycle, adding anoxic zone, MBBR zone, internal reflux and carbon source dosing facilities. The effluent indexes were superior to the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant ( GB 18918-2002 ). The total investment of the project was 202. 86 million yuan, and operating costs of the upgrading project increased by 0. 201 yuan/m^3. The upgrading project had the characteristics of non-stop construction , high total nitrogen removal and lower operation cost of the sewage treatment plant, which could be used to provide reference for upgrading of sewage treatment plant in northern China.