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What Is The MBR Membrane Process?

What Is The MBR Membrane Process?

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Last Updated on January 3, 2023 by Kevin Chen

The MBR Membrane process combines membrane separation technology with bioreactors for sewage treatment. It not only saves the construction of the secondary sedimentation tank but also greatly improves the efficiency of solid-liquid separation. At the same time, due to the increased concentration of activated sludge in the aeration tank and the appearance of special bacteria (especially dominant bacteria) in the sludge, the biochemical reaction rate is improved. By reducing the F/M ratio to reduce the amount of excess sludge (even to zero sludge), it solves many outstanding problems in the traditional activated sludge process.

What are the features of the MBR Membrane Process?

Compared with traditional biochemical water treatment technology, the MBR Membrane process has the following 6 features:

  1. Efficient solid-liquid separation, the separation effect is much better than that of traditional sedimentation tanks, the effluent water quality is good, and the suspended solids and turbidity of the effluent are close to zero. They can be directly reused, realizing the recycling of sewage.
  2. The high-efficiency retention effect of the MBR membrane makes microorganisms completely retained in the bioreactor, realizes the complete separation of the hydraulic retention time (HRT) and the sludge retention time (SRT) of the reactor, and the operation control is flexible and stable.
  3. Because MBR combines the traditional wastewater treatment aeration tank and secondary sedimentation tank into one, and replaces all the process facilities of tertiary treatment, it can significantly reduce the floor space and save the civil construction investment.
  4. It is beneficial to the interception and reproduction of nitrifying bacteria, and the system has high nitrification efficiency. By changing the operation mode, it can also have the functions of ammonia removal and phosphorus removal.
  5. Since the sludge age can be very long, the degradation efficiency of refractory organic matter is greatly improved.
  6. The reactor operates under high volume load, low sludge load and long sludge age, and extremely low residual sludge output. Since the sludge age can be infinitely long, theoretically, it can realize zero sludge discharge.
MBR Membrane Application - Wastewater Treatment
MBR Membrane Application – Wastewater Treatment

The above is the information about the MBR Membrane process. If you still have questions about the membrane bioreactor or need to purchase MBR membranes, don’t hesitate to contact SPERTA.

Shanghai SPERTA Environmental Technology Co., Ltd. has specialized in producing water treatment products for many years. The company has the core technology of producing MBR membrane components and has a high production capacity, aiming to build a high-quality brand of MBR production and sales all over the world. If you have any needs, please feel free to contact us.

Kevin Chen

Kevin Chen

Hi, I'm the author of this post and have been in this field for over 5 years. If you have questions regarding the MBR membrane products or want to purchase the MBR membrane, please feel free to contact me by email. kevin@spertasystems.com

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Can We Clean The Mbr Membrane With Sodium Hypochlorite?

Can We Clean The MBR Membrane With Sodium Hypochlorite?

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.

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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.

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