Key Discussions – Delegate from WDT Visits SPERTA

Understanding and managing fiber breakage is essential for the optimal operation of Membrane Bioreactor (MBR) systems. This article delves into the causes, consequences, and prevention strategies for fiber breakage, providing valuable insights for maintaining the efficiency and longevity of MBR systems.

When we purchase the MBR membrane, it is usually transported by large trucks. We must understand some matters in advance in the transportation process, especially long-distance transit, to avoid damage to the MBR membrane element caused by the wrong operation.

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.

The cleaning frequency of the MBR membrane and the choice of the cleaning agent determine the final filtration effect of the membrane bioreactor. Some people think we can use sodium hypochlorite as the cleaning agent, but some people don’t think so.