不同回流比对UBAF脱氮性能的影响  

Influence of reflux ratio on nitrogen removal performance of UBAF

作　　者：李思敏[1] 陈利娜[1] 缪保芬[1] 

机构地区：[1]河北工程大学城市建设学院,河北邯郸056038

出　　处：《工业用水与废水》2010年第1期28-31,共4页Industrial Water & Wastewater

基　　金：中韩国际合作项目;河北省科技支撑项目(07276713D)

摘　　要：对上向流曝气生物滤池(UBAF)前置反硝化工艺处理城市污水的脱氮性能进行了试验研究,探讨了在不同回流比下,系统对COD、TN、NH3-N的去除效果。试验结果表明:当回流比从100%增加到300%时,对COD和NH3-N的去除率有着缓慢的增加,但当回流比增加到400%时,COD和NH3-N的去除率开始下降;回流比对TN的去除影响显著,在一定范围内增大回流比有利于TN的去除,当回流比为200%时,对TN的去除效果最好;在最佳回流比200%下,系统对COD、NH3-N和TN平均去除率分别为92.53%、93.50%和79.79%,出水COD、NH3-N和TN的平均质量浓度分别为17.70、2.12和11.36 mg/L,均能达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级标准。The nitrogen removal performance of up-flow biological aerated fiher（UBAF） pre-denitrification process in municipal wastewater treatment was studied and the removal efficiencies of COD, TN and NH3-N at different reflux ratios were investigated. The results showed that： the removal rates of COD and NH3-N increased slowly when the reflux ratio increased from 100% to 300%, however, when the reflux ratio increased to 400%, the removal rates of the above two pollutants began to decrease. The reflux ratio had a significant influence on TN removal and the increasing of reflux ratio was of benefit to TN removal within a certain range. The highest removal rate of TN was obtained at reflux ratio of 200%, and under the said optimal reflux ratio, the average removal rates of COD, NH3-N and TN by the system reached 92.53%, 93.50% and 79.79% respectively, the average mass concentration of COD, NH3-N and TN in effluent water were 17.70, 2.12 and 11.36 mg/L respectively. The effluent quality met the specification for grade 1 in Discharge standard of pollutants for municipal wastewater treatment plant（GB 18918--2002）.

关 键 词：上向流曝气生物滤池 前置反硝化 回流比 脱氮性能 

分 类 号：X505[环境科学与工程—环境工程] X703