余杭污水处理厂提标改造--强化二级处理、深度过滤

摘要

Yuhang wastewater treatment plant (WWTP),which was reached strandard B of first class of (GB/ T 18918—2002),was applied with DE oxidation ditch as the original process. The WWTP enhanced the secondary treatment by adding methanol carbon source at the front of the oxidation ditch and adding PAC at the back. Follow-up process with denitrification biological filters and biological aerobic filters improved nitrogen removal Meanwhile,active sand filters were used for removing TP and SS. The effluent met the Standard A first class of GB/ T 18918—2002.%余杭污水处理厂原主体工艺采用双沟式氧化沟，执行城镇污水处理厂污染物排放标准（GB／ T 18918—2002）一级 B标准。该厂通过前端季节性添加甲醇碳源和后端添加PAC絮凝剂强化二级处理，后续采用反硝化生物滤池和曝气生物滤池强化脱氮，并新增活性砂滤池去除磷和S S ，出水优于一级A标准。