How to Improve the Efficiency of Municipal Sewage Treatment Equipment in Removing Nitrogen and Phosphorus Nutrients?
Publish Time: 2026-04-02
In municipal sewage treatment, the removal of nutrients such as nitrogen and phosphorus is a crucial step in preventing eutrophication and protecting the ecological environment. With increasingly stringent discharge standards, traditional treatment processes are no longer sufficient to meet the demands for efficient nitrogen and phosphorus removal. Improving the efficiency of municipal sewage treatment equipment in nutrient removal through process optimization and technological synergy has become a key direction for industry development.1. Optimizing Biological Treatment Processes is the Core ApproachBiological methods are currently the main way to remove nitrogen and phosphorus in municipal sewage treatment. By adopting improved A²/O, oxidation ditch, or sequencing batch reactor (SBR) processes, nitrification, denitrification, and biological phosphorus removal can be achieved within the same system. Rationally controlling the ratio of anaerobic, anoxic, and aerobic zones helps provide suitable growth environments for different microorganisms, thereby improving the conversion and removal efficiency of nitrogen and phosphorus. Simultaneously, extending the sludge age can enhance the activity of nitrifying bacteria and improve nitrogen removal capacity.2. Enhance Carbon Source Management to Improve Denitrification EfficiencyDuring nitrogen removal, the denitrification reaction requires a sufficient carbon source as an electron donor. However, available carbon sources in municipal wastewater are often insufficient, easily limiting the denitrification effect. Adding external carbon sources or optimizing the influent distribution can improve denitrification efficiency. Furthermore, employing segmented influent or recirculation control technology allows for a more rational distribution of carbon sources within the system, also contributing to improved overall nitrogen removal performance.3. Chemical and Physical Methods to Assist Phosphorus RemovalFor deep phosphorus removal, biological methods alone sometimes fail to meet stringent discharge standards. In such cases, chemical phosphorus removal processes can be introduced, using agents such as iron or aluminum salts to remove phosphorus through precipitation. Simultaneously, combining this with efficient sedimentation or filtration technologies can further improve effluent quality. The combination of biological and chemical methods not only improves phosphorus removal efficiency but also enhances system stability.4. Intelligent Control and Operational Optimization Enhance Overall EfficiencyWith the development of automation technology, municipal sewage treatment equipment can dynamically adjust key parameters such as dissolved oxygen, return ratio, and sludge concentration through online monitoring and intelligent control. This refined control ensures the system always operates at its optimal state, thereby improving nutrient removal efficiency and reducing energy consumption. For example, precise control of aeration intensity not only ensures smooth nitrification but also avoids energy waste.5. New Technology Applications Drive Performance ImprovementIn recent years, some new technologies have been gradually applied in the field of nitrogen and phosphorus removal, such as short-cut nitrification-denitrification and anaerobic ammonium oxidation processes. These technologies can reduce carbon source requirements and lower energy consumption, providing new solutions for efficient nitrogen removal. At the same time, the application of new packing materials and biofilm technology also helps to increase microbial attachment and reaction efficiency, thereby improving overall treatment capacity.In summary, improving the efficiency of municipal sewage treatment equipment in removing nitrogen, phosphorus, and other nutrients requires a comprehensive approach encompassing process optimization, carbon source management, chemical assistance, and intelligent control. Through multi-technology collaboration and continuous innovation, we can not only meet increasingly stringent emission standards, but also promote the wastewater treatment industry towards high efficiency, energy conservation and sustainability.
