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。
The Taxia wastewater treatment plant of nanping City had a treatment capacity of 5× 10^4 m^3· d^-1. The process was designed as SBR initially and then optimized to A^2/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 A^2/O process is feasible and effective in treating combined sewage with high organics concentrations.
出处
《水处理技术》
CAS
CSCD
北大核心
2011年第9期132-135,共4页
Technology of Water Treatment
关键词
A^2/O工艺
升级改造
污水处理厂
脱氮除磷
A^2/O process
upgrading and reconstruction
wastewater treatment plant
nitrogen and phosphorus removal
