城镇污水处理厂提标改造技术研究进展

Research Progress on Upgrading and Reconstruction Technology of Urban Sewage Treatment Plants

随着国家和地方排放标准的日趋严格,我国城镇生活污水处理厂的提标改造迫在眉睫。以预处理节省和扩展碳源、二级处理强化脱氮除磷、深度处理氮磷达标为目标,从预处理、二级处理、深度处理三个方面总结分析了碳氮磷提标改造的核心技术原理及应用效果,并认为目前主体工艺的优化加深度处理是保障城镇污水稳定达标的首选,提出了适合我国城镇生活污水处理厂提标改造技术的优选路线。

It has become a national and local trend to formulate strict discharge standards.Accordingly,it is extremely urgent to upgrade and reconstruct the urban domestic sewage treatment plants in China.The aims of this work included reducing the requirement of carbon source and enlarging the sources of carbon by pretreatment,strengthening nitrogen and phosphorus removal by secondary treatment,and reaching the standard of nitrogen and phosphorus by advanced treatment.From the aspects of pretreatment,secondary treatment and advanced treatment,we summarized and analyzed the core technology principles and practical outcomes on the upgrading of carbon,nitrogen and phosphorus removal.It is preferred to optimize the main process and advanced treatment,which could ensure the stability of urban sewage to meet the discharge standards.We further proposed an optimal route,which is suitable for the upgrading and reconstruction of urban domestic sewage treatment plants in China.