【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。更多还原

【Abstract】 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 m3/(m2·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)".更多还原