襄城县污水处理厂污水处理工艺提标改造

The Upgrading and Reconstruction of Wastewater Treatment Process of the XiangChengxian Sewage Treatment Plant

为了进一步降低污染物排放量,保护水环境,襄城县污水处理厂实施了提标改造。将CASS工艺改造为A/A/O,并新增二沉池、中途提升泵站、高效沉淀池等处理单元,采用在缺氧池投加碳源、A/A/O出水端投加液体聚合硫酸铁等方式提高脱氮除磷效果。提标改造后污水处理厂11个月的运行数据表明,出水水质能稳定达到《城镇污水处理厂污染物排放标准》(GB 18918-2002)一级A出水标准要求。

Xiangcheng sewage treatment plant upgraded and reconstructed itswastewater treatment process from CASS to A/A/O to further reduce the discharge of pollutants to protect the water environment.Additional treatment units including secondary sedimentation tank,mid-lift pump station and high density sedimentation tank were constructed.Carbon source and liquid polyferric sulfate was added to the anoxic tank and the outlet of A/A/O to improve the effect of denitrification and dephosphorization respectively.The results of 11-month operation showedthat the effluent quality was stable,and the concentrations of all the measured pollutants met the class-one A in the Discharge standard of pollutants for urban sewage treatment plant(GB 18918-2002).