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MBBR core technique
MBBR is a new type high efficiency reactor which combine the advantage of activated sludge and biofilm manner, at the same time, it overcome its disadvantage, its core technique is :
Chose one performance suspended biofilm filling into aeration area,
And inoculate nitrification bactria, aerobic denitrifying bacteria and other organisms, microbial flora in the suspended carrier and activated sludge to grow rapidly, when the aeration suspended biological carrier are disordered shape rolling in liquid state in the reactor, gas, liquid and solid three phase full contact, the pollutants in wastewater was intercept and adsorb by biofilm and activated sludge, and as a microbial nutrition, be digested, in the process of its production and breeding wastewater degradation.
Technique advantage:
1.biological suspended carrier with superior performance
a. Internal high porosity, large specific surface area, strong adsorption ability, microbial adhesion easily
b. Degradation of organic matter, nitrogen and phosphorus
c. Easily fluidization, high utilization rate of oxygen
d. convenient to use
2.Aeration system with superior performance
MBBR aeration system is made up of high pressure pump aerator and lifting aeration device, the lifting aeration device is made up of perforation aeration pipe and lifting pipe.
A. Aeration performance superior , easy to maintain
B. Aeration pipe without blocking,easy to maintenance
3. low operation cost
4. short construction time, low construction cost.
5.Nice appearance
6. Process performance is stable and reliable, good water quality
7.Flexible equipment use
MBBR process principle and characteristic
Process principle
MBBR is one kind of new type high effective reactor which between activated sludge method and the fixed biofilm method.Larger specific surface area of the reactor from packing for freedom of movement in the water, sewage continuous pass by the reactor which equipped with mobile packing, it will form into biofilm when grow in packing, large microorganism breed in the biofilm,autotrophic and heterotrophic microorganisms using C, N, P, etc in water to make metabolism , thus to to realize purify sewage function.
The sewage continuous pass by the suspended padding internal of MBBR reactor , it will form biomembrane inside and outside padding surface,in the action of microorganism in biofilm , make the sewage purified. the Packing move freedom in the action of mixed liquor convolute and reversed in reactor.
MBBR reactor with characteristic of bearing impact load ,long sludge age,small excess sludge, with high efficiency and operate flexibility of activated sludge process, comparing with technology , with the characteristic:
(1)the sludge concentration higher, ordinary sludge concentration is the 5~10 times activated sludge process, the sludge quality concentration in aeration pond can reach 30~40g/L .
(2) no easy blocking,no need backwashing and backflow.
(3)as suspended padding of the process core with the aerobic and anaerobic metabolism, can better denitrification and dephosphorize.
MBBR technique feature
The MBBR reactor is developed in the base of biological filtering tank and biological fluidized bed technique ; it not only has the traditional biological
Membrane manner advantage of resistance to shock loading, sludge age long, less residual sludge, but also has the activated sludge high efficiency and operation flexibility, it has the following feature:
small occupy area
(4) Large amount of activity of microorganisms
MBBR biofilm carrier is fluid, due to water shear force and water movement generated friction, biofilm on the surface of the packing will fall off naturally, part of the sludge with water flow out reactor, part of the sludge still remains in the reactor, make the effect of activated sludge function . Sludge concentration is 5 ~ 10 times of ordinary active sludge, purification function increased significantly; Microbial phase diversity, biological food chain is long. So it won't blocking, no need backwashing and backflow, small water head loss.
(5) superior denitrification
Packing formed good breeding, anoxic and anaerobic environment, nitrification and denitrification reaction can happen in a reactor, removal of ammonia nitrogen has a good effect.
(6) better removal organism
Reactor with high sludge concentration, sludge concentration commonly 5 ~ 10 times of the normal activated sludge process, can be as high as 30 to 40 g/L. Improves the processing efficiency of organic matter, and because of packing, water is in motion, so the gas, water, good mass transfer between solid filler on biofilm activity, enhance the organic load and efficiency of the system.
2.3 packing feature
The use of special suspended packing is the core part of MBBR process. MBBR used packing is polyethylene or polypropylene plastic packing usually, give priority to with the cylinder or sphere. The carrier density is slightly lower than water (0.92 ~ 0.97 g/cm3), packing is bigger than surface area (160 ~ 500 m2 / m3). Surface biofilm attached to grow easily, and the structure of the clever design make packing when use cluster, jams, always has the ideal void fraction, and has a good ventilation, water resistance, make the whole process of mixing and aeration system to facilitate maintenance and management.
MBBR structure:
MBBR mainly is composed of reactor inner and outside tank body,aerator,lifting aerating device and suspended biocarrier.
1). water inlet pipe 2). internal tank body
3). outlet water pipe 4).lifting aeration device
5). Silence chamber 6). diversion trench
7). flexible hose 8). suspended biocarrier
9). inspect hole 10). wind rain cover
11).Air piping 12). high pressure vortex blower
13). outer tank
MBBR media Main feature:
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