What is MBR biological membrane filtration technology in wastewater treatment?
MBR (Membrane Bioreactor) technology is a wastewater treatment system that uses membrane filtration. Inside the system, there are tanks or biological devices used to treat wastewater.
This process primarily utilizes activated sludge technology combined with membrane filtration for microbial separation. The sludge content in the biological tank is retained through the microfiltration mechanism of the membrane. Simultaneously, due to the small particle size, the wastewater after passing through the membrane will have improved quality.
It can be said that MBR membrane wastewater treatment technology is one of the most modern and widely used methods, especially in urban or industrial areas.
Advantage
MBR membrane wastewater treatment technology
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Separating suspended solids, bacteria, or certain large organic molecules, etc.
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The water retention time is quite short, only about 2.5 to 5 hours.
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The treated water meets high standards set by the Ministry of Health and the Ministry of Natural Resources and Environment.
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Activated sludge concentrations ranging from 5,000 to 12,000 mg/l help reduce the volume of the biological treatment tank.
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It is possible to minimize the levels of COD and BOD5 in water.
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The operation process is simple, and it also has the capability of self-operation.
The operating principle of MBR membrane filtration.
The MBR membrane filter section will be designed to be placed in the Aerotank aerobic biological tank.
First, wastewater is introduced into the system and permeates through a filter membrane. Here, this type of filter membrane is capable of removing toxic waste particles that are quite small, only about 0.01 – 0.2 µm in size. This area will only allow clean water to pass through, retaining all the sludge, organic and inorganic solids, etc., on the surface of the filter membrane.
The pumping system will draw water from the water pipe to the clean water storage tank. The operating time is typically about 10 minutes of work followed by 1-2 minutes of rest. This time is adjustable, so you can customize it to suit your water treatment system.
During operation, if the pressure exceeds 50 kPa, the suction pump system will automatically stop (normal pressure is only about 10-30 kPa). The backwashing pump system will then clean the filter membrane to prevent clogging.
Applications of MBR biological membrane filtration technology
Currently, MBR wastewater treatment technology is being used in a wide variety of industries.
Especially in areas with high concentrations of biologically contaminated wastewater, such as:
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Domestic wastewater from residential areas, restaurants, hotels, resorts, or industrial zones.
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Wastewater areas of hospitals, clinics, health centers, etc.
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Wastewater from industrial zones in the following sectors: beer production, dairy production, seafood processing, and cassava starch production.
Hopefully, this article from Toan A will provide you with more useful information about this technology. If you are truly interested and want to design or install MBR biological membrane filtration technology for wastewater treatment for your company, business, clinic, etc., please contact us.