【摘要】 南平市塔下污水处理厂处理规模为5×104m3.d-1,原设计为SBR工艺,2006年升级改造为A2/O工艺。介绍了该厂A2/O工艺特点及其设计、运行参数。A2/O反应池总污泥龄约为15～25 d,采用混合液内回流+污泥回流的脱氮除磷模式。进水为生活与工业混合污水(约121:),COD和BOD分别在180～400 mg.L-1和30～160 mg.L-1范围内变化。工艺优化后,COD、BOD5、SS、NH3-N、TN和TP的平均去除率分别可达90%、96%9、5%9、0%、64%、64%,出水水质可达到GB18918-2002的一级B标准,说明对于进水COD和BOD5较高的混合污水,采用A2/O是可行且有效的。更多还原

【Abstract】 The Taxia wastewater treatment plant of nanping City had a treatment capacity of 5×104 m3 ·d-1.The process was designed as SBR initially and then optimized to A2/O in 2006.The technological features,the design and operating parameters were introduced.The total sludge age was around 15～25 d while the mixed-liquid and sludge was recycled to improve the NH3-N and TP removal efficiency.The influent was domestic and industrial mixed sewage(about 12:1).The COD and BOD5 ranged 180～400 mg·L-1 and 30～160 mg·L-1,respectively.After the process optimization,The average removal efficiency of COD、BOD5、SS、NH3-N、TN and TP was achieved to be 90%、96%、95%、90%、64% and 64%,respectively.The effluent quality reached the first level B criteria specified in the discharge standard of pollutants for municipal wastewater treatment plant(GB 18918-2002),proving that A2/O process is feasible and effective in treating combined sewage with high organics concentrations.更多还原