XIAHai-xia,FANXin-yu,ZHANGQiang,et al.Application of AAAOA+MBR Process in Land Saving Design of Municipal Wastewater Treatment Plant[J].China Water & Wastewater,2025,41(22):45-50.
AAAOA+MBR在市政污水厂节地设计中的应用
- Title:
- Application of AAAOA+MBR Process in Land Saving Design of Municipal Wastewater Treatment Plant
- Keywords:
- municipal wastewater treatment plant; land saving; AAAOA; MBR; air/water ratio
- 摘要:
- 西北某污水处理厂现已满负荷运转，由于用地受限，扩容工作需在原厂址范围内开展。同时，其出水需从《城镇污水处理厂污染物排放标准》（GB 18918—2002）一级B标准提升至一级A标准。在用地指标仅0.125 m2/（m3·d-1）的条件下，实现生物池+深度处理段新建8×104 m3/d的处理规模。为满足用地限制和出水水质要求，秉持集成一体化建（构）筑物的设计理念，选用AAAOA+MBR作为主体工艺，同时采取增大生物池有效水深（8.0 m）、配套建筑物与构筑物合建等节地措施，实现节约占地33.75%。污水处理厂投运后，出水水质稳定且优于设计标准；生物池实际需气量节约40%以上，曝气风机电耗至少降低18%，可为同类工程提供参考。
- Abstract:
- A municipal wastewater treatment plant (WWTP) located in Northwest China is currently operating at full capacity. Owing to spatial constraints, any expansion must be implemented within the existing site boundaries. Concurrently, the effluent quality requirements are being upgraded from the first level B limit to the first level A limit as stipulated in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002). A new treatment capacity of 8×104 m3/d for the biological tank combined with the advanced treatment unit was achieved, even under a low land use index of only 0.125 m2/(m3·d-1). To comply with land use constraints and effluent quality standards, the AAAOA+MBR process was selected as the core treatment technology, in alignment with the design principle of integrated and unified structures. Additionally, space-efficient measures were implemented, including increasing the effective water depth of the biological tank to 8.0 m and co-constructing auxiliary buildings and facilities, resulting in a 33.75% reduction in land occupation. After the WWTP put into operation, the effluent quality remained stable and was consistently superior to the design discharge standard. The actual air requirement of the biological tank was reduced by over 40%, while the power consumption of the aeration blower was decreased by no less than 18%, offering valuable reference for similar wastewater treatment projects.
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