低温条件下BAF+SPD组合工艺对滇池入湖河水的脱氮效果  

Effect of nitrogen removal of river water treatment using BAF+SPD combined process at low temperature

作　　者：吴伟龙[1] 杨璐华[1] 杨飞飞[1] 赵兰[1] 吴为中[1] 

机构地区：[1]北京大学环境科学与工程学院,北京100871

出　　处：《环境工程学报》2013年第12期4597-4602,共6页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(50978001);国家重大专项课题(2012ZX07102002);国家公益项目(2010467012)

摘　　要：为缓解湖泊富营养化问题,需进一步降低入湖河流氮的含量。针对滇池流域新运粮河的低C/N水质特征,研究了冬季低温条件下的微曝气生物滤池(BAF)及固相反硝化(SPD)组合异位脱氮工艺。结果表明,BAF+SPD组合工艺启动挂膜阶段,约3周后,NH+4-N的去除率达80%以上,而反硝化细菌增殖相对缓慢,约5周后,NO-3-N的去除率达80%以上;稳定运行的低温阶段,除降雨时间外,NH+4-N平均去除率达80%,出水NH+4-N浓度<1 mg/L;NO-3-N平均去除率达到85%以上,出水NO-3-N浓度<1 mg/L;TN平均去除率达80%以上,出水TN浓度<2 mg/L,主要水质指标达到国家地表水Ⅴ类标准。In order to alleviate lake eutrophication problem, excessive nitrogen of inflowing river water need to be further reduced. The water of the New Yunliang River, one inflowing river of Dianchi Lake, was treated by the combined process of the biological aerated filter （BAF） and the solid-phase denitrifying （SPD） reactor at low temperature in winter, considering the low C/N ratio. Started from bio-film accreting stage, the average ammonia nitrogen （NH4＋-N） removal rate of the BAF rose above 80% three weeks later and the nitrate nitrogen （NO3--N） removal rate of the SPD reactor reached over 87% five weeks later. During low temperature operating stage, the average NH4＋-N removal rate and NO3--N removal rate maintained over 80% and 85%, respectively, except for rainy days. Both the effluent NH4＋-N and NO3--N concentrations were below 1 mg/L. The average total nitrogen（TN） removal rate reached above 80% and the effluent TN concentration was below 2 mg/L. The main water quality index could meet levelⅤof the environment quality standards for surface water.

关 键 词：曝气生物滤池 固相反硝化 低温 脱氮 

分 类 号：X522[环境科学与工程—环境工程]