To reduce MBR membrane pollution, optimizing aeration is essential!!!
To reduce MBR membrane pollution, optimizing aeration is indeed a key factor. Here are some ways to optimize aeration to reduce MBR membrane pollution:
1. Dynamic aeration: Dynamic aeration can effectively delay membrane pollution. Studies have shown that using variable aeration intensity (such as 0.75-1.50-3.00m³/(m²·h)) can delay the critical point of TMP “transition” and extend the operation time of MBR in the second stage of membrane pollution.
2. Adjust aeration intensity: Appropriate aeration intensity can slow down the rate of membrane pollution. Increasing aeration intensity can slow down the trend of increasing transmembrane pressure difference (TMP), but energy consumption should also be considered.
3. Optimize the layout of the aeration system: Setting different numbers of aeration tubes in the middle and lower parts and bottom of the MBR membrane can enhance the intensity of air scouring, reduce mud block formation, and achieve a more uniform cleaning effect.
4. Regular maintenance: By briefly opening the vent valve every day, negative pressure can be formed to help remove sludge and other impurities blocked in the aeration tube and ensure the smooth flow of aeration holes.
5. Control sludge concentration: Excessive sludge concentration will increase the possibility of mud between membranes, resulting in blockage of aeration channels. The sludge concentration needs to be regularly tested and adjusted to an appropriate level.
6. Use precise aeration control system: The use of advanced control systems can monitor and adjust the aeration volume in real time to ensure stable and efficient operation of the MBR system.
7. Innovative aeration technology: Research and apply new in-situ aeration methods, such as optimizing bubble diameter and shape, and increasing turbulent kinetic energy to achieve more uniform bubble streamlines and better membrane cleaning effects.
By optimizing aeration, not only can membrane fouling be effectively reduced, but also the treatment efficiency and economic benefits of the MBR system can be improved. In practical applications, appropriate aeration optimization strategies should be selected according to specific circumstances, combined with other membrane fouling control measures to achieve the best operating effect.