What is the MBR?
I. Product Overview
Membrane Bioreactor (MBR) is a kind of advanced technology
developed since the end of 20th century which realized the
efficient combination of membrane separation technology with
biological technology. The membrane separation technology replaces
the traditional active sludge method and the normal filter unit,
its strong separation ability can make the SS turbidity near to be
zero. Hydraulic retention time (HRT) sludge age (SRT) is completely
separated, the outlet water is good and stable in quality, it can
be reused without the third level treatment. Due to the high
security and economic and effective water, it greatly expands the
scope of application of waste water recycling.
II. Technological Process and Features
l Technological Process:
Sewage → Grille → Regulating pond → MBR Bioreactor →
Discharge(reuse)
1. Temperature: 5℃~45℃, average membrane aperture 0.10 μm.
2. PH: 2~12, membrane thickness: 40μm.
3. Outlet water turbidity: <1 NTU , outlet water SS <1mg/L.
4. Membrane area: 8m2, advised gas-water ratio: 25:1~30:1.
5. Operating pressure: -0.01 ~ -0.03MPa.
l Features:
1. Because of the high-efficiency solid-liquid separation, it can
efficiently remove the SS, colloidal material and dead microbe in
the sewage, no need sedimentation tank, or filter device, nor other
solid-liquid separation device.
2. The MBR can make the biomass in biological treatment unit maintain
high concentration, thus highly improve the volume loading.
Meanwhile, the high efficient membrane separation can shorten the
HRT. The device is with a compact structure and small space
occupation.
3. MBR can filter out bacteria, part of the harmful material such as
virus, it can obviously save dosing disinfection dosage, greatly
improve the quality of the output water and reduce the operating
cost and widen the scope of application of water.
4. Due to the strong interception function of MBR, it can keep the
microbe in the reactor to avoid the loss of all kinds of microbe
groups, which is good for the growth of the bacteria (such as the
nitrifying bacteria), at the same time, it can lengthen the
residence time of difficult degradable macromolecule organics to
improve the decomposition so as to make the metabolic system
process smoothly. The system has a strong impact resistance and
wide suitability.
5. It can realize the completely separation of HRT and SRT. By the
extended aeration, it can consume the organics, it can
theoretically achieve the effect of no excess sludge emissions,
thus reduce the surplus sludge treatment costs significantly.
6. The unique mode of operation makes the membrane surface no
blocking, and the cleaning interval time is long. The way to clean
the membrane is easy, since the membrane module can be separately
cleaned, thus, the maintenance is convenience and simple.
The module design make the machine flexible, it is easy to expand
the volume.
MBR is a kind of new technology for waste water treatment by
combining membrane separation technique with activated sludge
method. It can be used for municipal sewage and industrial waste
water treatment and substitute for secondary sedimentation tank in
removing suspended particles, so as to increase nitrogen removal
rate and organics degradation rate.
As a waste water treatment system features simple operation, high
automation and modular design, it also has below advantages:
*Save 50% occupying area compared with traditional system.
*Relative high MLSS value(<15g/L)and long residue time for
sludge(<60days).
*Stable producing water quality for different inlet water.
*Less sludge residue reduces cost for sludge treatment.
*Low energy consumption, simple cleaning and low operation cost.
Upper: Traditional Method for Treatment
Below: New MBR Plant Treatment.
