CN218642574U - Spherical MBBR filler - Google Patents

Abstract

The utility model discloses a spherical MBBR packs relates to a filler. Good fluidization effect and use effect, and can avoid disintegration. The spherical MBBR filler comprises a spherical hollow structure positioned in the center, and twelve regular pentagonal pore channels and twenty regular hexagonal pore channels which are formed by outwards extending the spherical hollow structure. The filler can be applied to an MBBR sewage treatment process, is designed in an integral spherical shape, has the density close to that of water, and has excellent vulcanization performance. The filler has large contact surface roughness, good hydrophilicity and charge property, and is suitable for the growth and the biofilm formation of microorganisms. The porosity is high and does not need too large filling volume. The filler is spherical, the density is 0.97-1.03, and good fluidization can be realized by small aeration or stirring.

Description

Spherical MBBR filler

Technical Field

The utility model relates to a pack, especially, relate to a spherical MBBR packs.

Background

Moving-bed-biofilm reactor (MBBR) has been introduced in the end of the 80 s and is applied in Europe quickly, and it absorbs the advantages of both traditional activated sludge process and biological contact oxidation process and becomes a new and efficient composite process. The core part is that suspended filler with specific gravity close to water is directly added into an aeration tank to be used as an active carrier of microorganisms, the microorganism is in a fluidized state under the action of aeration in the aeration tank and the lifting of water flow, and when the microorganisms are attached to the carrier, the floating carrier freely moves in a reactor along with the convolution and turning action of mixed liquid, thereby achieving the purpose of sewage treatment. As a process combining an activated sludge method of suspension growth and a biofilm method of attachment growth, the MBBR method has the advantages of the two methods: the occupied land is small, and the device only needs 20 percent of the volume of a common oxidation pond under the same load condition; microorganisms are attached to the carrier and flow along with water flow, so that activated sludge backflow or circulating back washing is not needed; the carrier organisms continuously fall off to avoid blockage; the organic load is high, the impact load resistance is strong, so the effluent quality is stable; the water head loss is small, the power consumption is low, the operation is simple, and the operation is easy; meanwhile, the method is suitable for reconstruction projects and the like.

The existing MBBR filler is generally flat, square or columnar in shape, and cannot well move and turn over the bottom filler in the stirring or aeration process when being put in liquid, or the turning effect is unsatisfactory, so that the MBBR filler cannot contact liquid in more areas to cause the MBBR filler to be insufficiently utilized, and the fluidization effect is unsatisfactory. Spherical MBBR packing also exists in the market at present, but basically, the spherical MBBR packing is formed by combining two hemispheres, other sponge packing (such as sponge polyurethane or other porous sponges) is filled in the middle of a sphere, and the spherical packing with the structure is easy to disintegrate in the operation process, so that the sphere is separated from the sponge, and accidents influencing the operation are caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to above problem, provided a fluidization is effectual, excellent in use effect to can stop the spherical filler of MBBR of disintegration, solve a great deal of problem that the filler produced in operation and fluidization in-process of having now packed.

The technical scheme of the utility model is that: the spherical MBBR filler comprises a spherical hollow structure 3 positioned in the center, and twelve regular pentagonal pore passages 1 and twenty regular hexagonal pore passages 2 which are formed by outwards extending the spherical hollow structure 3.

In other words, set up a plurality of baffles rather than even as an organic whole on globular hollow out construction 3's outer wall promptly, also even as an organic whole between the adjacent baffle, through a plurality of baffles at globular hollow out construction 3 external separation twelve regular pentagon pore 1, twenty regular hexagon pore 2, regular pentagon pore 1 and regular hexagon pore 2 cross-section's size from inside to outside grow gradually to be linear growth.

Further, the spherical hollow structures 3 are connected and communicated with all the regular pentagonal pore channels 1 and the regular hexagonal pore channels 2, and the diameter of each spherical hollow structure 3 is 10-20mm.

Further, the lengths of the regular pentagonal pore canal 1 and the regular hexagonal pore canal 2, namely the depths extending outwards from the spherical hollow structure 3 are equal and are 8-20mm.

Further, the surfaces of the inner walls of the regular pentagonal ducts 1 and the regular hexagonal ducts 2 are rough or wavy.

Or a plurality of bulges are uniformly arranged on the inner walls of the regular pentagonal pore canal (1) and the regular hexagonal pore canal (2).

Further, the spherical filler material of MBBR is the integrated into one piece injection molding.

Further, the MBBR spherical filler is subjected to hydrophilic modification by polyethylene.

Further, the MBBR spherical filler is also subjected to charge modification.

The utility model discloses can use in MBBR sewage treatment process, this filler is close water for whole spherical design, density, and the cure property is superior. The filler has large contact surface roughness, good hydrophilicity and charge property, and is suitable for the growth and the biofilm formation of microorganisms. The porosity is high and does not need too large filling volume. The filler is spherical, the density is 0.97-1.03, and good fluidization can be realized by small aeration or stirring.

Drawings

Figure 1 is a front view of the present case,

figure 2 is a rear view of the present case,

FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 2;

in the figure, 1 is a regular pentagon hole channel, 2 is a regular hexagon hole channel, and 3 is a spherical hollow structure.

Detailed Description

In order to clearly explain the technical features of the present patent, the following detailed description of the present patent is provided in conjunction with the accompanying drawings.

The MBBR technology principle is that a certain amount of suspension carriers are added into a reactor to improve the biomass and the biological species in the reactor, thereby improving the treatment efficiency of the reactor. As the density of the filler is close to that of water, the filler is completely mixed with the water during aeration, and the environment for the growth of microorganisms is three phases of gas, liquid and solid. The collision and shearing action of the carrier in water makes air bubbles finer, and the utilization rate of oxygen is increased. In addition, each carrier has different biological species inside and outside, anaerobic bacteria or facultative bacteria grow inside, and aerobic bacteria grow outside, so that each carrier is a micro-reactor, nitrification reaction and denitrification reaction exist simultaneously, and the treatment effect is improved. The MBBR technology has the advantages of both a traditional fluidized bed and a biological contact oxidation method, is a novel efficient sewage treatment method, ensures that a carrier is in a fluidized state by means of aeration in an aeration tank and the lifting action of water flow, further forms activated sludge for suspension growth and a biomembrane for attachment growth, so that the biomembrane for the moving bed uses the space of the whole reactor, fully exerts the advantages of both attachment phase and suspension phase organisms, makes the organisms benefit from the advantages of both attachment phase and suspension phase organisms, and supplements each other. Unlike previous packings, suspended packings are called "mobile biofilms" because they are able to come into contact with the sewage many times.

As shown in fig. 1-3, the spherical MBBR filler is in an integral football shape, and the sphere is provided with 12 regular pentagonal ducts 1, 20 regular hexagonal ducts 2 and a spherical hollow structure 3;

the MBBR spherical filler is an integrally molded injection molding;

the diameter of the outer wall surface of the MBBR spherical filler is 15-45mm;

the density of the MBBR spherical filler is 0.97-1.03, which is close to the density of water, so that the filler can be in a suspended state in the water;

the MBBR spherical filler material is polyethylene, polypropylene, polyurethane foam and the like;

further, the MBBR spherical filler is subjected to hydrophilic modification by polyethylene;

further, the MBBR spherical filler is also subjected to charge modification;

the regular pentagonal pore canal 1 extends from the surface of the MBBR spherical filler to the spherical hollow structure 3, and the extending depth is 8-20mm.

The regular hexagonal pore canal 2 extends from the surface of the MBBR spherical filler to the spherical hollow structure 3, and the extending depth is 8-20mm.

The spherical hollow structure 3 is communicated with all the regular pentagonal pore channels 1 and the regular hexagonal pore channels 2, and the diameter of the spherical hollow structure is 10-20mm;

furthermore, the surfaces of the channel partition plates of the regular pentagonal pore passages 1 and the regular hexagonal pore passages 2 are rough or wavy, or a plurality of bulges are uniformly arranged on the inner walls of the regular pentagonal pore passages 1 and the regular hexagonal pore passages 2. So as to improve the film forming speed.

The rapid debugging starting of the MBBR is divided into three stages

1. Filling material feeding stage

1. When the filler is added, whether the accumulation phenomenon occurs or not is observed, and once the accumulation phenomenon occurs, the adding is stopped. And continuing to observe and add the mixture on the next day.

2. When the filler is added, intermittent aeration is adopted, and the aeration can be continued at night, but the aeration quantity needs to be reduced.

3. After 24 hours of operation, continuously feeding water for 2-3 hours, continuing the aeration, after 48 hours of operation, observing the film formation condition on the filler, increasing the water inlet quantity, prolonging the water feeding time, checking the dissolved oxygen condition in the pool, and preferably keeping the dissolved oxygen condition at about 1.5-2.0 mg/L. After the operation is carried out for 72 hours, the water inlet is connected and gradually added to the design requirement, and the design water quality requirement can be expected to be met in about 7 days according to the routine inspection of the water inlet and outlet water quality on duty.

2. Stage of culturing biofilm

The culture of the biofilm is to generate and accumulate a certain amount of microorganisms in a treatment system and to enable the biofilm on the filler to reach a certain thickness by a certain means, and the culture modes mainly comprise static culture and dynamic culture.

1. Static culture

The static culture is to prevent the new microbes from flowing away with water, to provide the contact time between the microbes and the filler layer as long as possible, and to accelerate the formation of the biofilm, the initial stage is to avoid the problem that the nutrient of the wastewater is single, so that the nutrient is expressed by C: n: adding nutrient substrates such as urea, diamine and white sugar into the mixture according to the proportion of P = 100. Firstly, the inoculation sludge (10 percent of the effective biochemical volume) and the waste water are pumped into a biochemical pond, and then aeration culture is started. The stacking volume of the filler in the biochemical pool is 35-40% of the effective volume of the reaction pool. Standing for 4-5h without aeration to inoculate the solid microorganisms on the filler, then aerating for 1h, standing for 2h, aerating for 1h, repeating the operation, hanging the biofilm on the surface of the filler after 4-5 days, and starting continuous small-water-volume water inlet on the 6 th day.

2. Dynamic culture

After 6 days of closed aeration culture, a thin layer of tawny biological membrane grows on the surface of the filler, then continuous water feeding is carried out, dynamic culture is carried out, the water inflow is adjusted, and the dissolved oxygen is controlled to be 2-4 mg/L (the dissolved oxygen is measured by an oxygen dissolution instrument). After about 15 days, the fillers had some amoeba, roaming worms (observed by a biomicroscope), the fillers had sticky and greasy feeling when touched, and protozoa such as flagellates, tickworms, paramecium free bacteria, etc. appeared after 20 days. After 20 days of culture, metazoan such as rotifer and nematode appear, the marker biological membrane is grown. A continuous industrial operation can be started.

3. Acclimation stage of biological membrane

The acclimation aims to select microorganisms adapting to the actual water quality condition, eliminate useless microorganisms and enable nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria to become dominant flora through acclimation for the treatment process with the nitrogen and phosphorus removal function. The method comprises the steps of firstly keeping the normal operation of the process, then strictly controlling process control parameters, controlling DO between 2 and 3mg/l on average, controlling the aeration time of an aerobic pool to be not less than 5 hours, measuring various water quality indexes and control parameters in the process every day, and successfully culturing the biomembrane when the average thickness of the biomembrane is about 0.2-0.5mm until various indexes such as BOD5, SS, CODCr and the like of effluent meet the design requirements.

The present invention has many specific embodiments, and the above description is only the preferred embodiment of the present invention, it should be noted that, for those skilled in the art, a plurality of improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims (8)

1. The spherical MBBR filler is characterized by comprising a spherical hollow structure (3) positioned at the center, twelve regular pentagonal pore passages (1) and twenty regular hexagonal pore passages (2) which are formed by outwards extending the spherical hollow structure (3).

2. The spherical MBBR filler according to claim 1, wherein said spherical hollows (3) are connected and connected with all of said regular pentagonal cells (1) and regular hexagonal cells (2), and the diameter of said spherical hollows (3) is 10-20mm.

3. The spherical MBBR filler according to claim 1, wherein the length of said regular pentagonal holes (1) and regular hexagonal holes (2), i.e. the depth extending outwards from the spherical hollow structure (3), is equal and is 8-20mm.

4. A spherical MBBR packing according to claim 3, characterized in that the surface of the inner walls of the regular pentagonal cells (1) and regular hexagonal cells (2) is rough or undulated.

5. A spherical MBBR packing according to claim 3, characterized in that a plurality of protrusions are provided uniformly on the inner walls of the regular pentagonal ducts (1) and the regular hexagonal ducts (2).

6. A spherical MBBR filler according to any of claims 1 to 5, wherein said MBBR spherical filler material is integrally molded as an injection molded part.

7. A spherical MBBR filler according to claim 6, wherein said MBBR spherical filler is hydrophilically modified with polyethylene.

8. The spherical MBBR filler of claim 7, wherein said MBBR spherical filler is further modified by charging.

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