How does MABR membrane reduce sludge generation?
MABR membrane technology can effectively reduce sludge generation, mainly through the following aspects:
1. Efficient oxygen supply: MABR membrane directly transfers oxygen to the biofilm through the hollow fiber membrane, avoiding the dissolution and diffusion loss of oxygen in water and improving the oxygen utilization efficiency. This efficient oxygen supply method reduces excessive aeration and thus reduces the generation of sludge.
2. Biofilm structure: The biofilm formed on the MABR membrane has a unique hierarchical structure, including aerobic, anoxic and anaerobic areas. This structure allows different types of microorganisms to coexist, improves the degradation efficiency of pollutants, and reduces the generation of excess biomass.
3. Autotrophic denitrification: In MABR systems, the growth rate and production coefficient of autotrophic denitrifying bacteria are relatively low. Compared with heterotrophic organisms, autotrophic bacteria produce less biomass, which helps to reduce the overall sludge production.
4. Biofilm balance: Biofilm accumulation in MABR systems is more easily balanced by erosion and biomass decay. This natural balance mechanism helps control biofilm thickness and reduce the generation of excess biomass.
5. Efficient pollutant removal: MABR technology can simultaneously achieve efficient organic matter removal and nitrogen removal, reducing the source of sludge generation.
6. Reduce excessive aeration: In traditional activated sludge process, excessive aeration can lead to excessive microbial growth and produce a large amount of sludge. The bubble-free aeration characteristics of MABR avoid this problem and help control sludge production.
Through these mechanisms, MABR technology significantly reduces the amount of sludge produced while maintaining efficient treatment effects, providing a more economical and environmentally friendly solution for sludge management in sewage treatment plants.