What are the Materials of MBR Membrane?
MBR membrane is also known as membrane bioreactor. It combines membrane separation and biological treatment technology and is often used in sewage and industrial wastewater treatment.
How to Do Offline Chemical Cleaning For MBR Membranes
Step 1: Remove the suction tube and the aeration tube from the MBR module. Then take the MBR module out of the tank.
Step 2: Use a nozzle to clean and remove the activated sludge attached to the surface of the fibers.
Step 3: Take the MBR elements out of the module and immerse the elements in a prescribed chemical solution tank. Stay for 6-12 hours.
Step 4: Take out the MBR element from the immersion cleaning tank and wash it thoroughly with water to remove the chemical solution.
Step 5: Install the MBR on the MBR module after cleaning.
Step 6: Connect the aeration pipe and put the module in the tank. Stop the filtration, just let the aeration run for more than 30 minutes, and then start the filtration.
Step 7: Before discharging the chemical solution, reduce the sodium hypochlorite with sodium thiosulfate (Na2S2O3 NH2O), and then discharge.
Step 8: If there is a large amount of inorganic scale on the surface of the MBR after sodium hypochlorite washing, acid washing is also needed.
How to Clean MBR Membranes by Chemical
Step 1: Stop the suction pump and close the water pipe.
Step 2: Stay for 1 minute, close the blower to stop aeration.
Step 3: Open the dosing pipe, run the dosing pump, and inject the cleaning solution.
Step 4: Dilute the residual chlorine in the treated water before discharge.
Or return the treated water to the aerobic tank for residual chlorine dilution.
Step 5: Finish the above operations, open the suction pipe, run the suction pump, and resume regular operation.
How To Backwash MBR Membranes？
Tip 1: Use produced water or higher quality water as the backwash water.
Tip 2: Control the backwash pressure at 50 – 100 kPa.
Tip 3: Set backwash flow: 2 times of the produced water.
Tip 4: Set backwash time: 1 – 5min.
Tip 5: Adjust the backwash process per 1-12h according to the produced water quality.