PE02 HDPE Filter Media Bio Carrier Media For Water Treatment In
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Product Description
Biofilm reactors are divided into fixed bed and flow bed. In the
fixed bed, the biofilm carrier is fixed. In the traditional sewage
treatment system, the main technology is the fixed bed biofilm
technology. However, there are some problems in the traditional
fixed bed biofilm process, such as less effective contact between
microorganisms and sewage, easy blockage of filter material,
periodic back washing, and difficult replacement of fixed packing
and aeration equipment under packing. In recent years, the
performance and stability of MBBR have been improved continuously,
which has become an important technology of sewage treatment.
It not only integrates the advantages of activated sludge process
and biofilm process, but also overcomes the disadvantages of both.
It has the advantages of high processing capacity, low energy
consumption, no blockage, compact structure, no sludge reflux,
simple maintenance and management.
Film hanging method - mud discharge method
The methods of membrane hanging include free membrane hanging,
inoculation and rapid mud discharge.
The rapid sludge discharge method generally adopts activated sludge
inoculation. After the sewage to be treated contacts with the
inoculated sludge for a period of time without aeration, the sludge
water mixture is discharged, and then the continuous small flow of
water enters and aerates at the same time until the stable
operation.
The influence of packing characteristics on film hanging
The factors of biofilm adhesion are closely related to the surface
roughness, specific surface area, hydrophilicity, structure and so
on. The surface roughness is large, the microorganism is easy to
attach and grow on the surface of the packing, and the film hanging
speed is fast; the larger the specific surface area of the packing,
the easier the microorganism attaches, and the faster the biofilm
grows; the microorganism itself belongs to the hydrophilic
particle, so the hydrophilic packing is easy to promote the
formation of the biofilm; the structure of the packing itself
determines its adaptability to the hydraulic shear force in the
aerobic environment . The structure of MBBR packing, the biofilm
formed in the early stage of membrane hanging, can better resist
the hydraulic erosion.
Technology Parameter
| Type | Hole number | Density | Packing numbers | Menbrane-forming time | BOD5 Oxidation efficiency | Applocable temperature |
| PE02/K1 | 4 | 0.96-0.98 | >830000 | 3-15days | 2000-10000 | 5-60℃ |
| Size | Effictive surface | Porosity | Dosing Rate | Nitrification efficiency | COD Oxidation efficiency | Life-span |
| 11*7mm | >900 | >85 | 15%-68% | 400-1200 | 2000-15000 | >15years |
Disadvantages of low price fillers
As we all know, filler is the core of MBBR Process. Therefore, the
performance of the filler directly affects the difficulty of
membrane hanging, the amount of biomass in the reactor and the
treatment effect of the reactor.
For low-cost fillers, the factory may use recycled materials, or
the wall thickness is very thin, or add fillers such as calcium
carbonate. During the operation, with the passage of time, the
agitator stirs, the fillers may be broken in the reaction tank.
However, the filler is a kind of non degradable material, which is
difficult to clean in the reaction tank, but becomes a kind of
pollution.
