奥贝尔氧化沟工艺提标改造设计技术要点

Key Technologies for Design of Orbal Oxidation Ditch Upgrade and Reconstruction

某城区污水处理厂对奥贝尔氧化沟进行升级改造,将表曝改为底曝,并增加后置反硝化深床滤池。提标改造后实际运行表明,该工程除磷脱氮效果较好,出水水质达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。着重介绍了表曝改为底曝的设计思路及改造注意事项,并对提标改造设计要点进行了总结。

As the discharge standards improved recently, the Orbal oxidation ditch in a municipal wastewater treatment plant was upgraded and reconstructed by changing the aeration mode from surface aeration to bottom aeration and adding a post-denitrification deep bed filter. The actual operation showed that the process had good phosphorus and nitrogen removal effect, and the effluent quality was superior to the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treat- ment Plant （GB 18918 -2002）. The design ideas and tips of changing aeration mode from surface to bottom were introduced emphatically, and the key technologies for design of the upgrade and reconstruc- tion were summarized.