A^2O工艺在污水处理厂提标扩容工程中的应用

Application of A^2O Process for Upgrading and Capacity Expansion of WWTP

江苏某污水处理厂面临提标扩容的任务,设计改造后总处理规模为5×104m3/d,出水水质需达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准,通过比较,选用了运行更稳定、经济效益更优的方案,将现有CAST工艺改造成A2O工艺,同时增加深度处理。改造后污水处理厂运行良好,各项出水指标均稳定达标。

In order to meet the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918-2002）,a wastewater treatment plant in Jiangsu Province needed upgrading and expanding capacity up to 5 × 104 m3/d.A scheme with more stable operation and better economic benefit was selected by comparison,that is,the existing CAST process was replaced by A2O process,and an advanced treatment was added.After reconstruction,the wastewater treatment plant operated well,and the effluent quality met the discharge standard.