CN201896101U - Microbe suspending medium for moving bed biofilm reactor - Google Patents

Abstract

The utility model relates to the field of waste water treatment, and discloses a microbial suspension filler for a moving bed biofilm reactor, comprising a hollow cylinder, a cross support section is arranged inside the hollow cylinder, and the cross support section connects the inner cavity of the cylinder The body is divided into a plurality of cavities, the inner and outer walls of the hollow cylinder are evenly distributed with vertical guide flutes, and the vertical guide ribs are perpendicular to the radial surface of the cylinder. The utility model increases the surface area of the carrier, is beneficial to the attachment and growth of microorganisms, increases the contact probability of biofilms with oxygen and pollutants, and is beneficial to mass production.

Description

Microbial suspension packing for moving bed biofilm reactor

technical field

The utility model relates to the field of wastewater treatment, in particular to a microbial suspension filler for a moving bed biofilm reactor.

Background technique

Moving Bed Biofilm Reactor (MBBR for short, also known as fluid bed biofilm method) is a biological contact oxidation method in which the carrier layer of the growing biofilm flows continuously in the wastewater. The process uses suspended particles with a special structure as the biological carrier, and uses air aeration as the power to keep the filler in a suspended and fluidized state. It is a process that combines the activated sludge method of suspended growth and the biofilm method of attached growth. Good nitrogen and phosphorus removal effect. The MBBR method was first applied in Northern Europe, Norway and Sweden, and then extended to Europe and the United States. Now, the application in China is gradually increasing, and the development momentum is good.

Suspended filler is the core part of MBBR technology, and it is the carrier for the growth of microorganisms. At present, there are many types of biological carrier products at home and abroad, such as Pall rings, vertical flakes, multi-faceted hollow spheres and other suspension carriers. Due to the limitation of shape and structure design and defects in raw material selection, the specific surface area of these carriers is small, generally 50-450m ² /m ³ , there is not enough attachment surface for microorganisms; secondly, there is not enough space inside the carrier, the contact between the biofilm and oxygen and pollutants is not enough, and it is easy to block, which affects the suspension state of the filler and leads to local accumulation of the filler; Third, most of the raw materials used are resin materials such as polyethylene and polypropylene, and the microbes hang on for a long time, even more than three months, and the surface has poor hydrophilicity and is easy to fall off. These factors easily lead to reactor failure, resulting in unstable water quality.

Patent No. CN101066800A discloses a modified microbial membrane carrier, which proposes waste rock powder, coke powder, slag powder, iron powder and polyethylene, which are processed at high temperature in a granulator, and the purpose is to improve the hydrophilicity of the carrier surface. Patent No. 201165518Y discloses a microbial carrier device, placing several carriers in a porous container to avoid excessive concentration of microorganisms in a certain area of the reactor. Patent No. CN1994921A discloses a microbial suspension carrier for water treatment, the microbial suspension carrier is contained in two hemispherical shells. These patents have increased the specific surface area of the carrier to a certain extent, which is conducive to the attachment and growth of microorganisms, but have not improved the shape and surface of the carrier monomer, and the carrier monomer is too large, which is not conducive to mass production. , And it is not suitable for reactors with small sewage treatment capacity.

Contents of the invention

The utility model aims at the shortcoming that the specific surface area of the conventional microbial suspension filler is insufficient, which causes the microorganisms to have no enough attachment space, resulting in a decrease in the processing capacity of the reactor. , increase the contact probability of biofilm with oxygen and pollutants, and facilitate the mass production of microbial suspension fillers for moving bed biofilm reactors.

In order to solve the above technical problems, the utility model is solved through the following technical solutions:

Microbial suspension packing for moving bed biofilm reactors, including hollow cylinders, with cross-support sections inside the hollow cylinders, the cross-support sections divide the inner cavity of the cylinder into 4-6 cavities, hollow Vertical flow guide corrugated strips are evenly distributed on the circumferential surface of the inner and outer side walls of the cylinder, and the vertical flow guide corrugated strips are perpendicular to the radial surface of the cylinder.

Preferably, the cross support section includes a first support section and a second support section, the first support section intersects the second support section and is perpendicular to each other, and the first support section and the second support section are connected as a whole.

Preferably, the cross support section includes three support sections intersecting each other, and the three support sections are connected as a whole.

As a preference, the inner and outer walls of the cross support section are provided with vertical guide ribs.

As a preference, the outwardly protruding part of the vertical guide ribs has a height of 1-5 mm, and the distance between two adjacent vertical guide ribs is 2-5 mm.

Preferably, the cylinder has a diameter of 10-26 mm, a height of 8-18 mm, and a wall thickness of 1-6 mm.

As a preference, the outwardly protruding part of the vertical guide ribs has a height of 1-5 mm, and the distance between two adjacent vertical guide ribs is 2-5 mm. This increases the specific surface area of the filler and the adhesion of microorganisms, providing a good growth and reproduction carrier for microorganisms.

The suspension filler adopts 45%-76% of high-density polyethylene, 26%-34% of pumice, 1%-3.2% of activated carbon, 0.1%-1% of cross-linking agent and 0.01%-1% of water-soluble monomer. The density of the filler after hanging film is close to that of water, about 0.93-0.97g/m ³ , which is conducive to the inversion and rotation of the filler in the reactor, and a slight disturbance can make it in a fluidized and suspended state, reducing aeration energy consumption and making the The packing can be well distributed in the whole reactor, and there will be no excessive density in a certain area of the reactor.

Due to the adoption of the above technical scheme, the utility model has remarkable technical effects:

The utility model effectively increases the surface area of the carrier, and the specific surface area of the improved filler is more than 600m ² /m ³ , and the inner and outer surfaces and the support section are provided with raised vertical guide corrugated strips and are concave-convex pitted surfaces, so that microorganisms are easier to attach and grow , and the film-hanging time is reduced to about one week, and the guide corrugated strips are conducive to the suspension state of the filler in the reactor. A cross or "*" support section is set in the hollow cylinder (depending on the diameter of the carrier), and the internal space is divided into four or six equal spaces, which is beneficial for air bubbles and pollutants in the water to freely pass through the inside of the filler and increase the biofilm Probability of exposure to oxygen and pollutants. The main components of the filler are high-density polyethylene, pumice and a small amount of inorganic components. After the film is formed, the density is close to that of water, about 0.93-0.97g/m ³ . The filler can obtain a complete fluid state under slight stirring, and realize free and smooth rotation. , increase the impact and cutting of air bubbles in water, break up large air bubbles, prolong the residence time of air bubbles in water, increase the utilization rate of oxygen by 2%-6%, reduce energy consumption and enable the filler to be well distributed throughout the reactor Within, there will be no excessive density in a certain area of the reactor.

Description of drawings

FIG. 1 is a three-dimensional structural schematic diagram of Embodiment 1.

FIG. 2 is a schematic plan view of FIG. 1 .

3 is a schematic plan view of Embodiment 2.

The names of the parts indicated by the numbers in the above drawings are as follows: 1-cylinder, 2-cross support section, 3-cavity, 4-vertical guide corrugated bar, 5-vertical guide corrugated bar, 21- The first support section, 22 - the second support section, 23 - the support section.

Detailed ways

Below in conjunction with accompanying drawing 1 to Fig. 3 and specific embodiment the utility model is described in further detail:

Example 1

For the microbial suspension packing of moving bed biofilm reactor, as shown in Fig. 1 to Fig. 2, use comprises hollow cylinder 1, and cross support section 2 is arranged in hollow cylinder 1, and cross support section 2 connects cylinder The inner cavity of 1 is divided into 4 cavities 3, and the vertical guide corrugated strips 4 are evenly distributed on the circumferential surface of the inner and outer walls of the hollow cylinder 1, and the vertical guide corrugated strips 4 are perpendicular to the radial surface of the cylinder 1 .

The cross support section 2 includes a first support section 21 and a second support section 22 , the first support section 21 intersects the second support section 22 and is perpendicular to each other, and the first support section 21 and the second support section 22 are integrated.

The inner and outer walls of the cross-bracing section 2 are provided with vertical guide flutes 5 .

The height of the protruding part of the vertical flow guide corrugated strips 5 is 1 millimeter, and the distance between two adjacent vertical flow guide corrugated strips 5 is 2 millimeters.

The cylinder 1 has a diameter of 10 mm, a height of 8 mm, and a wall thickness of 1 mm.

The height of the protruding part of the vertical flow guide corrugated strips 4 is 1 millimeter, and the distance between two adjacent vertical flow guide corrugated strips 4 is 2 millimeters.

Example 2

For the microbial suspension packing of moving bed biofilm reactor, as shown in Fig. 1 to Fig. 2, use comprises hollow cylinder 1, and cross support section 2 is arranged in hollow cylinder 1, and cross support section 2 connects cylinder The inner cavity of 1 is divided into 4 cavities 3, and the vertical guide corrugated strips 4 are evenly distributed on the circumferential surface of the inner and outer walls of the hollow cylinder 1, and the vertical guide corrugated strips 4 are perpendicular to the radial surface of the cylinder 1 .

The cross support section 2 includes a first support section 21 and a second support section 22 , the first support section 21 intersects the second support section 22 and is perpendicular to each other, and the first support section 21 and the second support section 22 are integrated.

The inner and outer walls of the cross-bracing section 2 are provided with vertical guide flutes 5 .

The height of the part protruding outwards of the vertical guide corrugated strips 5 is 3 millimeters, and the distance between two adjacent vertical guide corrugated strips 5 is 3 millimeters.

The cylinder 1 has a diameter of 18 mm, a height of 13 mm, and a wall thickness of 3 mm.

The height of the protruding portion of the vertical flow guide corrugated strips 4 is 3 millimeters, and the distance between two adjacent vertical flow guide corrugated strips 4 is 4 millimeters.

Example 3

For the microbial suspension packing of moving bed biofilm reactor, as shown in Fig. 1 to Fig. 2, use comprises hollow cylinder 1, and cross support section 2 is arranged in hollow cylinder 1, and cross support section 2 connects cylinder The inner cavity of 1 is divided into 4 cavities 3, and the vertical guide corrugated strips 4 are evenly distributed on the circumferential surface of the inner and outer walls of the hollow cylinder 1, and the vertical guide corrugated strips 4 are perpendicular to the radial surface of the cylinder 1 .

The cross support section 2 includes a first support section 21 and a second support section 22 , the first support section 21 intersects the second support section 22 and is perpendicular to each other, and the first support section 21 and the second support section 22 are integrated.

The inner and outer walls of the cross-bracing section 2 are provided with vertical guide flutes 5 .

The height of the outward protruding part of the vertical guide corrugated strips 5 is 1-5 millimeters, and the distance between two adjacent vertical guide corrugated strips 5 is 5 millimeters.

The cylinder 1 has a diameter of 26 mm, a height of 18 mm, and a wall thickness of 6 mm.

The height of the protruding portion of the vertical flow guide corrugated strips 4 is 5 millimeters, and the distance between two adjacent vertical flow guide corrugated strips 4 is 5 millimeters.

Example 4

The microorganism suspension filler that is used for moving bed biofilm reactor, as shown in Figure 3, comprises hollow cylinder 1, is provided with cross support section 2 in hollow cylinder 1, and cross support section 2 connects the internal chamber of cylinder 1 The body is divided into 6 cavities 3, and the vertical flow guide corrugated strips 4 are evenly distributed on the circumferential surface of the inner and outer walls of the hollow cylinder 1, and the vertical guide corrugated strips 4 are perpendicular to the radial surface of the cylinder 1.

The cross support section 2 includes three support sections 23 intersecting each other, and the three support sections 23 are connected as a whole.

The inner and outer walls of the cross-bracing section 2 are provided with vertical guide flutes 5 .

The height of the protruding part of the vertical flow guide corrugated strips 5 is 1 millimeter, and the distance between two adjacent vertical flow guide corrugated strips 5 is 2 millimeters.

The cylinder 1 has a diameter of 10 mm, a height of 8 mm, and a wall thickness of 1 mm.

The height of the protruding part of the vertical flow guide corrugated strips 4 is 1 millimeter, and the distance between two adjacent vertical flow guide corrugated strips 4 is 2 millimeters.

Example 5

The microorganism suspension filler that is used for moving bed biofilm reactor, as shown in Figure 3, comprises hollow cylinder 1, is provided with cross support section 2 in hollow cylinder 1, and cross support section 2 connects the internal chamber of cylinder 1 The body is divided into 6 cavities 3, and the vertical flow guide corrugated strips 4 are evenly distributed on the circumferential surface of the inner and outer walls of the hollow cylinder 1, and the vertical guide corrugated strips 4 are perpendicular to the radial surface of the cylinder 1.

The cross support section 2 includes three support sections 23 intersecting each other, and the three support sections 23 are connected as a whole.

The inner and outer walls of the cross-bracing section 2 are provided with vertical guide flutes 5 .

The height of the part protruding outwards of the vertical guide corrugated strips 5 is 3 millimeters, and the distance between two adjacent vertical guide corrugated strips 5 is 4 millimeters.

The cylinder 1 has a diameter of 18 mm, a height of 13 mm, and a wall thickness of 3 mm.

The height of the protruding portion of the vertical flow guide corrugated strips 4 is 3 millimeters, and the distance between two adjacent vertical flow guide corrugated strips 4 is 4 millimeters.

Example 6

The microorganism suspension filler that is used for moving bed biofilm reactor, as shown in Figure 3, comprises hollow cylinder 1, is provided with cross support section 2 in hollow cylinder 1, and cross support section 2 connects the internal chamber of cylinder 1 The body is divided into 6 cavities 3, and the vertical flow guide corrugated strips 4 are evenly distributed on the circumferential surface of the inner and outer walls of the hollow cylinder 1, and the vertical guide corrugated strips 4 are perpendicular to the radial surface of the cylinder 1.

The cross support section 2 includes three support sections 23 intersecting each other, and the three support sections 23 are connected as a whole.

The inner and outer walls of the cross-bracing section 2 are provided with vertical guide flutes 5 .

The height of the protruding part of the vertical flow guide corrugated strips 5 is 5 millimeters, and the distance between two adjacent vertical flow guide corrugated strips 5 is 5 millimeters.

The cylinder 1 has a diameter of 26 mm, a height of 18 mm, and a wall thickness of 6 mm.

The height of the protruding portion of the vertical flow guide corrugated strips 4 is 5 millimeters, and the distance between two adjacent vertical flow guide corrugated strips 4 is 5 millimeters.

The utility model effectively increases the surface area of the carrier, and the specific surface area of the improved filler is more than 600m ² /m ³ , and the inner and outer surfaces and the support section are provided with raised vertical guide corrugated strips and are concave-convex pitted surfaces, so that microorganisms are easier to attach and grow , and the film-hanging time is reduced to about one week, and the guide corrugated strips are conducive to the suspension state of the filler in the reactor. A cross or "*" support section is set in the hollow cylinder (depending on the diameter of the carrier), and the internal space is divided into four or six equal spaces, which is beneficial for air bubbles and pollutants in the water to freely pass through the inside of the filler and increase the biofilm Probability of exposure to oxygen and pollutants. The main components of the filler are high-density polyethylene, pumice and a small amount of inorganic components. After the film is formed, the density is close to that of water, about 0.93-0.97g/m ³ . The filler can obtain a complete fluid state under slight stirring, and realize free and smooth rotation. , increase the impact and cutting of air bubbles in water, break up large air bubbles, prolong the residence time of air bubbles in water, increase the utilization rate of oxygen by 2%-6%, reduce energy consumption and enable the filler to be well distributed throughout the reactor Within, there will be no excessive density in a certain area of the reactor.

In a word, the above descriptions are only preferred embodiments of the present utility model, and all equal changes and modifications made according to the patent scope of the utility model should fall within the scope of the utility model patent.

Claims (7)

1. the microbial suspension filler that is used for MBBR, the right cylinder (1) that comprises hollow, it is characterized in that: be provided with in the right cylinder of described hollow (1) to intersect and support section (2), intersection support section (2) is divided into 4-6 cavity (3) with the internal cavity of right cylinder (1), stupefied of uniform vertical water conservancy diversion (4) on the periphery of the inside and outside sidewall of the right cylinder of hollow (1), vertical water conservancy diversion stupefied (4) is vertical with the diametric plane of right cylinder (1).

2. the microbial suspension filler that is used for MBBR according to claim 1, it is characterized in that: described intersection supports section (2) and comprises that first supports the section (21) and the second support section (22), the first support section (21) and the second support section (22) intersect and are vertical mutually, and first supports section (21) is connected as a single entity with the second support section (22).

3. the microbial suspension filler that is used for MBBR according to claim 1 is characterized in that: described intersection supports section (2) and comprises three support sections (23) that cross one another, and three are supported section (23) and are connected as a single entity.

4. the microbial suspension filler that is used for MBBR according to claim 1 is characterized in that: described intersection supports the inside and outside sidewall of section (2) and is provided with stupefied of vertical water conservancy diversion (5).

5. the microbial suspension filler that is used for MBBR according to claim 4, it is characterized in that: the outwards outstanding part of described vertical water conservancy diversion stupefied (5) highly is the 1-5 millimeter, and the spacing distance between the adjacent two vertical water conservancy diversion stupefied (5) is the 2-5 millimeter.

6. the microbial suspension filler that is used for MBBR according to claim 1 is characterized in that: the diameter of described right cylinder (1) is the 10-26 millimeter, highly is the 8-18 millimeter, and thickness of pipe is the 1-6 millimeter.

7. according to claim 1 or the described microbial suspension filler that is used for MBBR, it is characterized in that: the outwards outstanding part of described vertical water conservancy diversion stupefied (4) highly is the 1-5 millimeter, and the spacing distance between the adjacent two vertical water conservancy diversion stupefied (4) is the 2-5 millimeter.

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