How does MABR technology maintain the activity of biofilm?
The methods of MABR technology to maintain the activity of biofilm mainly include the following aspects:
1. Regular monitoring and regulation:
Regularly monitor the thickness and activity of biofilm and make fine adjustments when necessary.
By controlling the oxygen supply, create an environment suitable for the growth of nitrifying and denitrifying microorganisms in different layers of the biofilm and optimize the nitrogen removal efficiency.
2. Optimize operating parameters:
Control the appropriate temperature conditions. Studies have shown that within the temperature range of 18.8°C±3.3°C, the MABR system can maintain good treatment effects.
Regulate the influent water quality and water volume to avoid the impact load on the biofilm.
3. Maintain a stable oxygen supply:
MABR technology directly transfers oxygen to the biofilm through the hollow fiber membrane to ensure that the microorganisms have a stable oxygen supply.
By controlling the oxygen transfer rate, different oxygen concentration gradients can be formed in the biofilm, which is conducive to the growth of different functional bacterial communities.
4. Prevent pollution and blockage:
The MABR reactor forms a stable biofilm on the membrane surface, which can effectively prevent the entry of foreign matter and pollutants and reduce the risk of system pollution.
The membrane surface should be cleaned regularly to prevent blockage caused by excessive thickening of the biofilm.
5. Maintain microbial diversity:
The balance of different functional bacteria in the biofilm, such as nitrifying bacteria and denitrifying bacteria, can be maintained by reasonably controlling the operating conditions.
If necessary, microbial inoculation can be carried out to supplement or renew the functional bacteria in the biofilm.
6. Regular regeneration:
If the activity of the biofilm is found to decrease, consider re-filming operation to re-cultivate the biofilm with high activity.
Through these methods, MABR technology can maintain the long-term stable activity of the biofilm, ensuring the efficient operation of the system and the sewage treatment effect.