MBR is the abbreviation of Membrane Bio-Reactor. MBR refers to a new sewage treatment device that combines ultrafiltration and microfiltration membrane separation technology with bioreactors in sewage treatment. This reactor combines the advantages of membrane treatment technology and biological treatment technology. Ultrafiltration and microfiltration membrane components as mud-water separation units can completely replace secondary sedimentation tanks. The membrane components replace the terminal secondary sedimentation tank of traditional biological treatment technology, maintain high activated sludge concentration in the bioreactor, increase the organic load of biological treatment, thereby reducing the footprint of sewage treatment facilities, and reducing the amount of residual sludge by maintaining low sludge load. Membrane separation equipment is mainly used to intercept activated sludge and macromolecular organic matter in water. The concentration of activated sludge (MLSS) in the membrane bioreactor system can be increased to 8000~10,000mg/L, or even higher; the sludge age (SRT) can be extended to more than 30 days.
Due to its effective interception effect, the membrane bioreactor can retain microorganisms with a long generation cycle, and can achieve deep purification of sewage. At the same time, nitrifying bacteria can fully reproduce in the system, and its nitrification effect is obvious, which provides the possibility for deep phosphorus removal and nitrogen removal.
Technical Advantages
The MBR process can efficiently separate activated sludge from water. The sludge retained by the membrane can be returned to the biochemical pool, which can more than double the sludge concentration in the biochemical pool, thereby improving the biochemical efficiency of the biochemical pool and enhancing the degradation of pollutants. At the same time, the high-precision filtration of the membrane can efficiently ensure the quality of the produced water, and the produced water can be reused after disinfection.
Typical Applications
It is widely used in reverse osmosis system pretreatment, municipal sewage treatment and reuse, municipal building reuse water, industrial organic wastewater treatment and reclaimed water reuse, garbage leachate and other water treatment.
Advantage
MBR is an efficient combination of membrane separation technology and biological treatment. Its origin is to use membrane separation technology to replace the secondary sedimentation tank in the activated sludge method for solid-liquid separation. This process not only effectively achieves the purpose of mud-water separation, but also has incomparable advantages over traditional tertiary sewage treatment processes:
1. Efficient solid-liquid separation, its separation effect is far better than that of traditional sedimentation tanks, the effluent water quality is good, the effluent suspended solids and turbidity are close to zero, and it can be directly reused, realizing sewage resource utilization.
2. The efficient interception effect of the membrane allows microorganisms to be completely intercepted in the bioreactor, achieving complete separation of the reactor hydraulic retention time (HRT) and sludge age (SRT), and the operation control is flexible and stable.
3. Since MBR combines the aeration tank and the secondary sedimentation tank of traditional sewage treatment into one, and replaces all the process facilities of the tertiary treatment, it can greatly reduce the floor space and save civil engineering investment.
4. It is conducive to the interception and reproduction of nitrifying bacteria, and the system has high nitrification efficiency. By changing the operation mode, it can also have deammoniation and phosphorus removal functions.
5. Since the sludge age can be very long, the degradation efficiency of difficult-to-degrade organic matter can be greatly improved.
6. The reactor operates under high volume load, low sludge load, and long sludge age, and the residual sludge output is extremely low. Since the sludge age can be infinitely long, zero sludge discharge can be achieved in theory.
7. The system implements PLC control, which is easy to operate and manage.
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