Concept of MBR biomembrane?
MBR biomembrane technology is an abbreviation of the phrase Membrane Bioreactor. It is generally understood as a combination of microorganisms in suspended activated sludge tanks and hollow fiber membrane technology in wastewater treatment. The sludge content in the biological tank will be retained through the membrane’s microfiltration mechanism, thanks to its small size (µm), so the wastewater after leaving the membrane has very good quality.
This is an advanced wastewater treatment technology that is being widely used for urban and industrial wastewater in large projects throughout Vietnam and the world.
Operating principle of MBR biomembrane
- MBR biofilm is placed in Aerotank suspended aerobic biological tank
- Wastewater is permeated through the filter membrane into the capillary tube thanks to microfilters with very small sizes from (0.01 ~ 0.2 µm), allowing only clean water to pass through, retaining mud, inorganic and organic solids, and microorganisms on the membrane surface.
- The pen pump system will draw water from the capillary tube to the clean water tank, the suction pump is set to run for 10 minutes, then stop for 1-2 minutes depending on the calibration level.
- When the pressure in the membrane exceeds the normal pressure of 50kpa (from 10 – 30 kpa), the suction pump system will stop working, and at the same time activate the backwash pump to wash the membrane to ensure that the MBR biomembrane is not clogged.
The ability to treat pollutants of MBR biomembrane technology
MBR technology is suitable for treating many different types of wastewater such as:
Domestic wastewater
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Industrial wastewater
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Wastewater from manufacturing plants
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Aquaculture wastewater
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Leachate
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Advantages and disadvantages of MBR biomembrane technology
Advantages of MBR membrane technology
- MBR membrane technology is considered a new technology, a promising technology for the future that can remove pollutants quite thoroughly.
- MBR membrane can be used for aerobic and anaerobic biological tanks
- The combination of MBR membrane and biological tank as a stage in the wastewater treatment process acts as a replacement for sedimentation tank 2, saving space and can operate at higher sludge concentrations, helping to solve
- The output wastewater has good quality due to the removal of bacteria, microorganisms of very small size, Coliform, E-Coli causing diseases.
- Due to operating at high sludge concentrations, the efficiency of membrane technology increases by 20-30%, and treated wastewater can be reused for watering plants, cleaning, etc.
- Modular design can be applied to many project scales.
- The MBR filter membrane is coated with a layer of hydrophilic polymer belonging to the hydroxyl group, so it has a long life, ensuring the durability and stability of the treatment system.
Nhược điểm của công nghệ MBR
- Cannot be used with wastewater with high color and too many chemicals, because it is easy to get the membrane clogged frequently if not cleaned regularly and properly.
- Cost of buying chemicals to clean the MBR membrane.
Depending on each type of wastewater, there will be different membrane treatment cycles.
Some of the projects we have been and are doing
