西安市第三污水处理厂三期工程工艺设计与运行效果

Process Design & Operation Effect of Phase III Project of Xi’an No.3 Sewage Treatment Plant

西安市第三污水处理厂三期工程设计规模为5×10^4m^3/d,污水处理采用改良型底曝氧化沟工艺,出水水质达到GB18918—2002《城镇污水处理厂污染物排放标准》的一级A标准;污泥处理采用重力浓缩、机械离心脱水工艺。介绍该工程的设计进出水水质指标、主要构筑物的工艺设计参数及工艺设计特点。

The design scale of the third phase project of Xi’an No.3 Sewage Treatment Plant is 5×10~4 m^3/d. The improved bottom aeration oxidation ditch process is adopted for sewage treatment. The effluent quality meets the first A standard of GB 18918-2002 Pollutant Discharge Standard for Urban Sewage Treatment Plant. The gravity concentration and mechanical centrifugal dewatering process are used for sludge treatment. The design water quality index, process design parameters of main structures and process design characteristics of the project are introduced.