LIHongxuan,LIJiaoyang,XIAXiuli,et al.Structural Design for In-situ Non-disruptive Retrofitting of Unitank Reactor to A2O+MBR Process System[J].China Water & Wastewater,2026,42(12):118-123.
Structural Design for In-situ Non-disruptive Retrofitting of Unitank Reactor to A2O+MBR Process System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第12期
Page:
118-123
Column:
Date of publication:
2026-06-17
- Keywords:
- A2O+MBR process; Unitank reactor; in-situ retrofitting; wastewater treatment plant; strengthening design
- Abstract:
- To meet the class B limit specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (DB32/4440-2022) in Jiangsu Province, an in-situ non-disruptive retrofitting scheme was adopted by converting the existing Unitank reactor into A2O+MBR tank. The project encompassed structural strengthening of the original tank base slab, post-installation of dense clusters of large openings on the wall panels, construction of new channels, as well as heightening retrofitting and reinforcement of existing channels. The results indicate that the in-tank strengthening and retrofitting scheme-characterized by arranging new partition walls on pile tops, local thickening of the base slab, steel section reinforcement for the dense post-installed large wall openings, column-supported new channels, and steel structures for elevated channel extensions-is technically feasible. Following completion of the retrofitting, the effluent quality has remained consistently compliant with the standard, providing a valuable reference for the in-situ non-disruptive retrofitting and structural strengthening design of similar wastewater treatment plants.
Last Update:
2026-06-17