厌氧膜床-曝气生物滤池处理低浓度污水脱氮  

Denitrification of Low-strength Domestic Sewage by Using the SAFB-BAF Combined System

作　　者：凌霄[1] 胡勇有[1] 

机构地区：[1]华南理工大学环境科学与工程学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2004年第12期20-24,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：广州市科技局科技攻关重大项目 (2 0 0 2Z1-E0 0 2 2 );广州市环保局市级污染防治专项资金项目 (2 0 0 0- 0 0 1)

摘　　要：通过日处理量为 5 0 0m3·d- 1的中试试验研究了影响厌氧膜床 (SAFB) -曝气生物滤池 (BAF)组合工艺处理低浓度生活污水脱氮性能的关键因子 :曝气量与进水水质 .发现在气水比大于 2∶1时 ,TN和NH4 + N的平均去除率分别为 2 7.84 %和 83.39% ;而在气水比小于 2∶1时 ,TN和NH4 + N的平均去除率分别为 2 9.15 %和 70 .88% ,所以组合工艺的气水体积比宜控制在 2∶1到 3∶1之间 .当SAFB进水的BOD5/TN比大于 4时 ,反硝化作用不受碳源影响 ;而当BAF进水的CODcr/TN比大于 5时 ,硝化作用受抑制 .The denitrification performance of the special anaerobic film bed (SAFB) and bio logical aerated filter (BAF) combined system in pilot scale (with a daily treatm ent quantity of 500m3/d) for low-strength domestic sewage was assessed under the conditions of different aeration amounts and influent water quality. It is f ound that the average removal rates of TN and NH 4+-N are respectively 27.84 % and 83.39% when the ratio of air to water is greater than 2∶1, w hile being respectively 29.15% and 70.88% when the ratio is less than 2∶ 1. So the ratio should be controlled from 2∶1 to 3∶ 1. It is also found that the carbon source has no effect on the denitrifica tion when BOD 5/TN of SAFB intake is more than 4, but it seriously influences t he nitrification when COD cr/TN of BAF intake is more than 5.

关 键 词：厌氧膜床 曝气生物滤池 低浓度生活污水 脱氮 曝气量 

分 类 号：X703.1[环境科学与工程—环境工程]