Abstract:

The designed scale of the sewage treatment plant discussed is 50000 m³/d.A modified A₂/O process hasbeen used for treating the sewage water,and the sewage sludge is thickened and dewatered directly.The main structures,designed parameters and operation are introduced.The quality of the treated water meets the requirements of the first class of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant（GB 18918—2002）.

Key words: sewage treatment, modified A₂/O, sludge

摘要：

某污水处理厂设计规模为5×10₄ m³/d，其污水处理工艺流程采用改良型A₂/O 工艺，污泥处理采用直接浓缩脱水工艺。对该工艺流程的主要构筑物、设计参数及运行情况进行了介绍，结果表明，处理后的水质达到《城镇污水处理厂污染物排放标准》（GB 18918—2002）中的一级标准。

关键词: 污水处理, 改良型A2/O, 污泥