上向流曝气生物滤池新冲洗方式的研究  

Study on New Backwash Mode in Upflow Biological Aerated Filter

作　　者：谢观体[1] 陆少鸣[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510006

出　　处：《中国给水排水》2010年第19期92-94,共3页China Water & Wastewater

摘　　要：以上向流曝气生物滤池为研究对象，进行新冲洗方式——下向冲洗对滤池除污效果及水头损失控制的影响研究。结果表明：当进水氨氮平均为1．53mg／L时，出水氨氮平均为0．24mg／L，平均去除率达到83％；当进水浊度平均为14．3NTU时，出水浊度平均为7。lNTU，平均去除率为50％，显著减少了对微小絮体的截留；当进水CODMn平均为3．87mg／L时，出水CODMn平均为3．05mg／L，平均去除率为21％；冲洗前的水头损失维持在2．9～3．1kPa，冲洗后的水头损失为2．7～2．9kPa，24h内水头损失的变化量〈0．4kPa，从而可保证滤池长期稳定地运行。Taking the upflow biological aerated filter as a study object, the effect of a new back- wash mode namely downflow backwash on pollutant removal efficiency and control of head loss was inves- tigated. The results show that when the influent ammonia nitrogen averages 1.53 mg/L, the effluent am- monia nitrogen averages 0.24 mg/L, and the average removal rate is 83%. When the influent turbidity averages 14.3 NTU, the effluent turbidity averages 7.1 NTU, the average removal rate is 50%, and the interception of small floc is obviously reduced. When the influent CODMn averages 3.87 rag/L, the efflu- ent CODMn averages 3.05 mg/L, and the average removal rates is 21%. The head loss before backwash is maintained between 2.9 and 3.1 kPa, while that after backwash is between 2.7 and 2.9 kPa, and the variation of head loss is less than 0.4 kPa in 24 hours, which ensures long and stable operation of biologi- cal aerated filter.

关 键 词：上向流曝气生物滤池 下向冲洗 氨氮 浊度 CODMN 水头损失 

分 类 号：X703[环境科学与工程—环境工程]