沸石曝气生物滤池去除氨氮性能及生物学特征分析  

Ammonia removal behavior and biological characteristics of zeolite media in a biological aerated filter

作　　者：杜尔登[1] 刘翔[1] 王华[1] 邓栋[1] 

机构地区：[1]清华大学环境科学与工程系,北京100084

出　　处：《环境污染治理技术与设备》2006年第9期88-93,共6页Techniques and Equipment for Environmental Pollution Control

基　　金：国家"863"高技术研究发展计划资助项目(2003AA601080)

摘　　要：天然沸石具有较大的孔隙率和比表面积,对氨氮有较强的选择性离子交换能力。运用天然沸石曝气生物滤池处理城市污水厂二级生化出水,结果表明,曝气生物滤池有良好的去除效果。在气水比为3∶1,水力负荷为1 m/h,温度>20℃情况下,沸石曝气生物滤池对城市污水厂二级生化出水COD去除率为12.7%,NH3-N去除率为96.6%;试验系统沿程微生物活性和微生物量呈现逐渐下降趋势,而单位生物量的生物活性沿程分布则与此相反;曝气生物滤池对水中污染物的去除主要集中在底部进水端部分,当水流达到距进水端上方105 cm时,曝气生物滤池对水中NH3-N的去除率已达86.8%(占氨氮总去除率的90%),COD的去除率为13.3%(占COD总去除率的67%)。Natural zeolite has high porosity, large specific surface area and large selective ion exchange capacity for ammonia. A biological aerated filters （BAF） reactor for secondary effluent was conducted. The results show that, when the ratio of gas to liquid was 3：1, the hydraulic loading was 1 m/h, temperature varied from 20℃ to 25℃, 12.7% of COD and 96.6% of ammonia nitrogen（NH3-N） were removed. Microbial activity and biomass in the BAF reactor were in a regular pattern of gradient distribution from the lower to the upper along the direction of water flow; the contaminants were removed mainly in the bottom part, 86.6% of NH3-N （90% of removed NH3-N） and 13.3% of COD （67% of removed COD） were removed when the water flowed 105 cm filter media.

关 键 词：沸石曝气生物滤池 天然沸石 微生物活性 比氧呼吸速率 微生物量 硝化强度 

分 类 号：X703.1[环境科学与工程—环境工程]