摘要
以某城市污水处理厂二级出水为原水,通过中试研究了复合式曝气生物滤池(CBAF)用于再生水回用的脱氮效果的主要影响因素,包括碳源投加量、气水比和水力负荷。试验结果表明,当碳源投加量为15～25mgCODCr/L,气水比为2:1,水力负荷为10m3/(m2.h)时,CBAF运行工况最优,脱氮性能稳定良好。当进水氨氮浓度为1.0～17.4mg/L,总氮浓度为7～23mg/L时,出水氨氮浓度始终低于2mg/L,总氮浓度低于15mg/L,出水水质满足《城市污水再生利用景观环境用水水质》(GB/T18921—2002)的相关要求。
A pilot-scale study was conducted on combined biological aerated filter（CBAF） to investigate main influent factors on nitrogen removal performance for reclaimed water reuse,with the secondary effluent from a WWTP as feed water.The main influence factors included added carbon source dosage,ratio of air to water and hydraulic loading rate.Moreover,the optimal operation mode of CBAF was as following：added carbon source as 15～25 mgCODCr/L,the ratio of air to water as 2：1,and hydraulic loading rate as 10 m^3/（m^2·h）,under which CBAF had an excellent and stable removal performance of nitrogen.When the concentrations of NH3—N and TN in the influent were 1.0～17.4 mg/L and 7～23 mg/L respectively,the concentrations in the effluent were lower than 2 mg/L and 15 mg/L respectively.The water quality of the effluence met the requirements of ＂The reuse of urban recycling water—Water quality standard for scenic environment use（GB/T 18921—2002）＂.
出处
《给水排水》
CSCD
北大核心
2010年第7期140-143,共4页
Water & Wastewater Engineering
关键词
复合式曝气生物滤池
深度处理
再生水
脱氮
影响因素
Combined biological aerated filter（CBAF）
Advanced treatment
Reclaimed water
Nitrogen removal
Influence factors
