PE10 MBBR Filter Media Made Of 100% Virgin HDPE For Culturing
Biofilm
Product Description
Moving bed biofilm reactor (MBBR) has built thousands of sewage
(waste) treatment facilities in many countries in the world and
achieved good treatment results. MBBR Process uses the basic
principle of biofilm process, combined with the advantages of
activated sludge process, with suspended packing as the carrier of
microbial growth, through the full fluidization of suspended
packing in the secondary biochemical tank, to achieve efficient
sewage treatment.
Technology Parameter
| Type | Hole number | Density | Packing numbers | Menbrane-forming time | BOD5 Oxidation efficiency | Applocable temperature |
| PE10 | 64 | 0.96-0.98 | >210000 | 3-15days | 2500-20000 | 5-60℃ |
| Size | Effictive surface | Porosity | Dosing Rate | Nitrification efficiency | COD Oxidation efficiency | Life-span |
| 25*4mm | >1200 | >85 | 15%-65% | 500-1400 | 2500-20000 | >15years |
Working principle
The moving bed biofilm reactor (MBBR) needs the suspended packing
which has the characteristics of close proportion to water, large
effective specific surface area, and suitable for microbial growth.
At present, many domestic equipment manufacturers have successfully
developed MBBR, and China has issued the corresponding industry
specifications. The suspended packing can be suspended by slightly
stirring in the biochemical tank, which is easy to move freely with
the water and can form a good fluidization state.
Under aerobic condition, the buoyancy of air bubble generated
during aeration can promote the flow of packing and surrounding
water. When the air flow passes through the water flow and packing
gap, it is blocked by packing and divided into small bubbles.
In such a process, the packing is fully stirred and mixed with the
water flow, and the air flow is fully divided into small bubbles,
which increases the contact between the biofilm and oxygen and the
oxygen transfer efficiency. Under the anaerobic condition, the
water flow and packing are fully fluidized under the action of the
submersible agitator, so as to achieve the purpose of full contact
between the biofilm and the treated pollutants and degradation.
The core of MBBR Process is to realize the full fluidization of
suspended carrier fillers, so as to strengthen the treatment of
pollutants. In the practical application of MBBR Process, the main
factors to be considered are biochemical tank type, suspended
filler dosage, aeration system, intercepting screen, propeller,
etc.
The fluidization of biological packing in aeration zone is the key
to realize the good treatment function of the system. It mainly
depends on the aeration system in the aerobic area of the
biochemical tank. The proper aeration system in the aerobic area
can ensure the fluidization effect of the biological carrier
fluidizing filler, ensure the fluidizing filler to flow up and
down, front and back in the water body, make the filler and the
sewage fully mix, collide and contact, and effectively complete the
three-way contact, exchange and adsorption of pollutants, water and
gas.
Generally, the specific gravity of packing is 0.94-0.97. During the
cultivation period, a large number of biofilm will slowly adhere to
the packing surface. The larger the amount of adhesion, the larger
the specific gravity will gradually increase. When the biofilm on
the packing reaches a certain thickness, its specific gravity will
be greater than 1. The packing will sink from the non aeration area
to the bottom of the pool. The bottom of the aeration area has the
strongest impact force, which can quickly wash off the residual
biofilm on the packing, and the filling after the film removal The
specific gravity of the material also decreased to below 1, and
increased in the aeration area.
According to the changing characteristics of the specific gravity
before and after the biofilm hanging, the packing can flip in the
aeration area and the non aeration area with the water flow, thus
completing the growth and falling off process of the biofilm
alternately, ensuring the quantitative stability and activity of
the biofilm, and making the process operation more stable. In order
to prevent the fluidizing suspended packing from entering into the
next link with the mixed liquid, a screen is designed in the
appropriate position in the aerobic area for simple interception
and separation. The screen material is stainless steel, and the
type is matched with the suspended packing.
