Journal of Engineering Research

The upgrade and renovation of urban wastewater treatment plants is a critical measure to address the increasing water quality standards and environmental pressures. This paper delves into the process comparison for upgrades, analyzing the operational effectiveness of activated sludge methods, anaerobic-aerobic processes, extended activated sludge methods, and membrane bioreactors (MBRs). By comparing the effluent quality, treatment efficiency, operating costs, and maintenance complexity of different processes, it reveals the advantages and disadvantages of each process as well as their applicable scenarios. The study emphasizes that process selection should be based on the actual conditions of the wastewater treatment plant to ensure efficient, economical, and stable operation, providing scientific guidance for the upgrade and renovation of urban wastewater treatment plants.

Municipal sewage treatment plant; Upgrading and transformation; Process comparison; Operation effect; Effluent quality