乙酸钠碳源强化生物滤池对二沉池出水的脱氮效果  

Sodium Acetate as Carbon Source for Enhancing Nitrogen Removal from Secondary Effluent with Biological Filter

作　　者：葛勇涛[1,2] 焦阳[1] 李军[1] 毛世春[1] 李佟[2] 董文艺[3] 

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京城市排水集团高碑店污水处理厂,北京100022 [3]哈尔滨工业大学深圳研究生院,广州深圳518055

出　　处：《中国给水排水》2011年第7期98-100,共3页China Water & Wastewater

基　　金：国家自然科学基金资助项目(51078008);北京市自然科学基金资助项目(8092007);国家水体污染控制与治理科技重大专项(2008ZX07314-0092;008ZX07317-02)

摘　　要：对于碳源不足的城市污水厂二沉池出水,通过外加碳源提高对其TN的去除率是一种直接而有效的方法。采用生物滤池(滤速为2 m/h)深度处理二沉池出水,并投加乙酸钠碳源,发现当进水混合液的COD>95.0 mg/L时,对TN的去除率可达到98%;部分外加碳源可被DO消耗,只有当进水混合液COD增至57.7 mg/L时,出水DO降到0.8 m/L左右,反硝化现象才逐渐明显;当碳源投加不足时,会出现亚硝态氮的积累,当进水混合液的COD平均为81.1 mg/L时,亚硝态氮积累量高达6 mg/L。Additional carbon source is a direct and effective way to improve TN removal from the secondary effluent with carbon source shortage. The biological filter with a rate of 2 m/h is adopted for advanced treatment, and sodium acetate is used as carbon source. When the COD concentration in the influent mixture is more than 95.0 mg/L, the TN removal rate is 98%. The partial carbon source is consumed by DO. When the COD concentration in the influent mixture is 57.7 mg/L, the effluent DO is decreased to 0.8 rag/L, and the denitrification is obvious gradually. The carbon source shortage can result in nitrite accumulation, and the nitrite concentration is 6 mg/L when the COD concentration in the influent mixture is 81.1 mg/L.

关 键 词：二沉池出水 碳源缺乏 乙酸钠 生物滤池 脱氮 亚硝态氮积累 

分 类 号：X703[环境科学与工程—环境工程]