滤料体积比对前置反硝化BAF处理效果的影响研究

摘要

When the influent flow is 16.5 L/h,reflux ratio 200%and filtering velocity 2.8 m/h,the treatment effect of pre-denitrification BAF process has been investigated. The results manifest that when the filter volume ratios of anoxic section and aerobic section are 1∶1,1∶2,and 1∶3,its effluent COD,NH3-N and TN are able to reach the pri-mary Urban Sewage Treatment Plant Pollutant Discharge Standards(GB 18918-2002). When the filter volume ratio is 1∶4,its effluent COD exceeds the discharge standard,but the effluent of NH3-N and TN still meets the require-ments of priamry discharge standard.%在进水流量16.5 L/h，回流比200%，滤速2.8 m/h的工况下，考察了前置反硝化BAF工艺的处理效果。结果表明：在缺氧段与好氧段滤料体积比为1∶1、1∶2、1∶3条件下，出水COD、NH3-N和TN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；在滤料体积比为1∶4条件下，出水COD超出排放标准，而NH3-N和TN的出水效果仍满足一级排放标准。