Process Reconstruction Scheme of AAO+Secondary Sedimentation Tank Superimposed with Existing Treatment Unit of the WWTP
The original design scale of a wastewater treatment plant(WWTP)in Panzhihua is 1.9×104 m3/d,and the effluent quality is first class B discharge standard.With the continuous improvement of the city's requirements for water environmental protection and the increasing use of reclaimed water,the original tailwater discharge standards can no longer meet the relevant needs,so the WWTP needs to be upgraded and reconstructed.However,the WWTP is faced with problems such as limited geographical location,insufficient reserved land,and special-shaped site.The design team adapted measures to local conditions,laid out the plane scientifically,and dug deep into the potential in three dimensions,adopted the layout form of AAO+secondary sedimentation tank space superposition combination technology,and fully tapped the potential of the existing buildings,and upgraded the effluent quality from the first class B discharge standard to the first class A discharge standard.The project has high land use efficiency and good social and environmental benefits,which provides a new idea for the upgrading and reconstructing of WWTPs with tight urban land in mountainous areas.
AAOsecondary sedimentation tankswastewater treatment plant(WWTP)upgrading and reconstructionland saving
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