摘要：

华南某污水处理厂占地8万m²，原设计规模9万m³/d，需扩建至16万m³/d，出水达到《城镇污水处理厂污染物排放标准》（GB 18918—2002）一级A标准和华南地方标准《水污染物排放限值》（DB 44/26—2001）相关要求。项目预留用地仅1.4万m²且为三角形，对此，拆除部分现况附属构筑物，对厂区用地进行重新规划，同时采用“多段AAO+二沉池”为核心的工艺流程，在不新征占地且工程占地仅增加21%的情况下，使得处理水量提升至原工程的1.78倍。该工程避免了征地安置等相关问题的产生，且通过建、构筑物施工顺序的合理设计，减少了对现况工程的干扰，实现了短时间停水的工程扩建。扩容后，污水处理厂土地使用更加均衡，且兼顾了节约占地和降本增效。该项目相关措施可为类似污水处理厂扩建工程提供参考。

关键词: 污水处理厂, 扩建, 节地, 多段AAO

Abstract:

A sewage treatment plant in South China covered an area of 80 000 m², with an original design capacity of 90 000 m³/d. It needed to be expanded to 160 000 m³/d, and the effluent should meet the Class A standard of the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918—2002) and the local standard Discharge Limits of Water Pollutants(DB 44/26—2001) in South China. The reserved land for the project was only 14 000 m² and was triangular in shape. To address this, some existing ancillary structures were demolished, and the land for the factory area was re-planned. Meanwhile, a “multi-stage AAO+secondary sedimentation tank” process flow was adopted as the core, which increased the water treatment capacity to 1.78 times without new land acquisition and with only 21% increase in project land occupation. This project avoided issues related to land acquisition and resettlement, and through the rational design of the construction sequence of buildings, reduced interference with the current project and achieved expansion with short-term water outage. After expansion, the land use of the sewage treatment plant was more balanced, while also achieving land saving and cost reduction and efficiency improvement. Relevant measures could provide reference for similar sewage treatment plant expansion projects.

Key words: sewage treatment plant, expansion, land saving, multistage AAO

中图分类号: 

• X703