环境工程学报2024，Vol.18Issue(8)：2331-2338,8.DOI:10.12030/j.cjee.202311093
污水处理厂提标改造关键技术与工程实践
Key technologies and engineering practices for upgrading and renovating sewage treatment plants
摘要
Abstract
The Phase Ⅰ and Phase Ⅱ projects of a municipal sewage treatment plant in Hebei Province each have a capacity of 3.0×104 m3·d-1.The core treatment process consists of a"hydrolysis acidification tank"followed by a"continuous inflow cycle circulation aeration activated sludge system(CASS tank)"and an"ozone contact oxidation tank."Due to the extended operation time of the sewage treatment plant,the continuous increase in sewage collection volume in surrounding towns,and the improvement of discharge standards,the treatment capacity of the plant was relatively insufficient,and the outlet water quality cannot meet the required standard.After multiple process demonstrations,and considering factors such as land restrictions,operational status,and economic indicators,the targeting indicators included biochemical oxygen demand(BOD5),chemical oxygen demand(CODcr),ammonia nitrogen(NH3-N),total nitrogen(TN),and total phosphorus(TP).The biochemical treatment section of the sewage treatment plant was converted from a hydrolysis acidification tank to an anaerobic and anaerobic tank.And an improvement measure was implemented by adding elastic fillers to the anaerobic and aerobic tank.The advanced treatment section was converted from an ozone contact oxidation tank to an ozone catalytic oxidation tank.An analysis was conducted on the inlet and outlet water quality of each primary treatment unit during the process debugging period.The results showed that the upgraded and renovated sewage treatment system operates effectively,demonstrating advantages such as a high pollutant removal rate,stable treatment effect,and strong resistance to impact.The discharge concentrations of CODcr and TP were reduced to below 20 and 0.2 mg·L-1,respectively.The effluent water quality stably met the Class Ⅲ water standard in the Surface Water Environmental Quality Standard(GB 3 838-2002).It also met the emission limits of the core control area in the Daqing River Basin Water Pollutant Discharge Standard(DB 13/2795-2018).The research results can provide theoretical references for the upgrading and reconstruction of similar sewage treatment plants.关键词
污水处理厂/提标改造/深度处理/工艺调试Key words
sewage treatment plant/upgrade and project/advanced treatment/process adjustment分类
资源环境引用本文复制引用
丰元,张静雯,栗勇田..污水处理厂提标改造关键技术与工程实践[J].环境工程学报,2024,18(8):2331-2338,8.基金项目
河北省创新能力提升计划资助项目(215A7608D) （215A7608D）
