多样性技术路线实现更严格排放标准--以江苏省某污水处理厂提标改造工程为例

Diversified Technical Route for Implementation of Stricter Discharge Standard--Case of the Upgrading and Reconstruction Project of a WWTP in Jiangsu Province

江苏省《太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值》(DB 32/1072—2018)2018年6月1日正式发布实施。据此地方标准要求,省内某污水处理厂于2020年年底完成了全厂提标改造,目前出水达标且高效稳定运行。该厂污水处理设计总规模为30万m^(3)/d,已连续运行30多年,期间历经2008年一级A升级改造,部分设施设备建设及运行时间长,实际处理规模有所下降。本次提标改造工程,全面深入地开展了工艺运行效能评估与优化运行调研技术研究,多方案比选并采用因地制宜的多样性技术路线,通过有针对性增容提标、设备设施更新等全方位提标改造工作,在厂区不停产正常运行情况下,克服用地紧、工期短、改造难度大等各种困难,实现了设计处理水量和高排放标准出水的双提标处理实效。文中介绍了该污水处理厂的工程改造设计概况、改造工艺流程及难点特点、主要设计参数,分析了其运行效果和经济指标,可为类似污水处理厂提标改造工程提供一定参考借鉴。

Jiangsu Province’s Discharge Standard of Main Water Pollutants for Municipal Wastewater Tratment&Key Industries of Taihu Area(DB 32/1072—2018)was officially released and implemented on 1 June 2018.According to the requirements of this local standard,a wastewater treatment plant(WWTP)in the province completed a plant-wide upgrading and reconstruction at the end of 2020,and the current effluent meets the standards and operates efficiently and stably.The total design scale of the WWTP’s wastewater treatment is 300000 m^(3)/d.The WWTP has been running continuously for more than 30 years,during the period after the 2008 class A upgrading.The part of the facilities and equipment construction and operation has a long period of time,and the actual scale of treatment has decreased.This upgrading project has carried out comprehensive and in-depth technical research on process operation efficiency evaluation and optimization operation,and selected multiple schemes and adopted diversified technical routes according to local conditions.Through the comprehensive upgrading work such as targeted capacity increase and upgrading of equipment and facilities,under the condition of normal operation of the WWTP without stopping production,various difficulties such as tight land,short construction period and difficult transformation have been overcome,and the double upgrading treatment effect of the—181—designed water treatment and high discharge standard water has been achieved.The article introduces the engineering reconstruction design overview of the WWTP,transformation process and difficult features,the main design parameters,analyses of its operating results and economic indicators,which can provide a certain reference for similar WWTP upgrading and reconstruction projects.