Novel composite biological carrier filler

Abstract

The utility model discloses a novel composite biological carrier filler, and relates to the technical field of biological sewage treatment processes. The novel composite biological carrier filler disclosed by the utility model is of a spherical hollow structure, comprises the biological carrier body and the reinforcing ribs which are arranged on the biological carrier and form a 90-degree angle with each other, is made of modified polyurethane gel, has a larger specific surface area, is easy to fluidize, small in abrasion, easy to intercept and strong in hydrophilicity, can absorb water immediately after being added, and can absorb water quickly. The retention time is long, and the investment cost is low; the device is suitable for biological membrane growth, good in hydrophilicity, short in membrane culturing period, small in tank body occupied volume and low in energy consumption, and the treatment efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage biological treatment process, in particular to a novel composite biological carrier filler. Background Art

[0002] With the increase of population and the development of cities, urbanization and industrialization have brought great impacts on the environment, one of which is sewage discharge, so it is very important to treat sewage. In modern urban sewage treatment, biological treatment process is a commonly used secondary treatment process, and aerobic activated sludge method is the most in-depth and widely used sewage treatment method in the secondary treatment process. This method continuously blows air into sewage containing a large amount of dissolved organic pollutants. After a period of time, floccules with a large number of aerobic microorganisms are formed in the water-activated sludge. The activated sludge can absorb organic matter in the water. The microorganisms living on the activated sludge use organic matter as food and oxidize and decompose organic matter and ammonia nitrogen under aerobic conditions to purify the sewage. The essence of this treatment method is to make microorganisms attach to filter materials or certain carriers to grow and multiply, and form biofilms on them. The contact between sewage and biofilm, the organic pollutants in the sewage, as nutrients, are taken by the microorganisms on the biofilm, the sewage is purified, and the microorganisms themselves are also multiplied. Therefore, suspended biological carrier fillers are very important.

[0003] Fillers are divided into three categories: active fillers, inert fillers and composite fillers. Active fillers such as bagasse, soil, compost, peat, bark or their mixtures carry rich microbial colonies and nutrients required for microbial growth, but active fillers are prone to nutrient loss, compaction or corrosion collapse. Inert fillers such as volcanic rock, ceramics, polyethylene balls, etc. have strong acid resistance and mechanical strength, but the inert filler material itself lacks nutrients, and nutrients need to be added during the odor treatment process, which is costly. Traditional composite fillers are simple physical mixtures of active fillers and inert fillers. Although they combine the advantages of active fillers and inert fillers, the inherent disadvantages of active fillers and inert fillers still affect their service life, treatment efficiency, etc. Therefore, it is necessary to provide a composite biological carrier filler with a larger specific surface area, longer service life, higher treatment efficiency, and lower cost. Utility Model Content

[0004] The utility model aims to provide a more efficient and durable new type of composite biological carrier filler to address the deficiencies of the prior art. The filler can reduce the amount of sludge, reduce energy consumption and improve the sewage treatment effect.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A novel composite biological carrier filler comprises a biological carrier body and reinforcing ribs arranged outside the biological carrier body; the biological carrier body is a hollow structure, which consists of a skeleton, a wall structure attached to the skeleton and a pore structure on the wall structure.

[0007] Preferably, the novel composite biological carrier filler has a spherical structure as a whole.

[0008] Preferably, three reinforcing ribs are arranged on the outside of the biological carrier body for reinforcement, and the three reinforcing ribs are arranged at an angle of 90 degrees to each other.

[0009] Preferably, the material of the biological carrier body is modified polyurethane gel.

[0010] Preferably, the skeleton and the wall structure contain hydrophilic groups.

[0011] Preferably, the diameter of the pore structure is 1.1-1.3 nm, the pore spacing is 1.3-1.7 nm, and part of the pore structure penetrates the surface of the biological carrier body to form through holes.

[0012] Preferably, the novel composite biological carrier filler absorbs water immediately after entering the water, and the specific gravity after absorbing water is 1.0-1.03, which is greater than 1, and is easy to fluidize, effectively reducing the occurrence of filler accumulation, avoiding the occurrence of anaerobic zones in the aerobic tank, and facilitating stable process operation.

[0013] Preferably, the novel composite biological carrier filler is spherical in shape with a diameter of 18-22 mm. Preferably, the density of the novel composite biological carrier filler is 11.75-25.25 kg / m 3 .

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The bio-carrier filler of the utility model is spherical, and the spherical shape makes the bio-carrier more resistant to wear and has a longer service life. At the same time, it reduces the wear on the pool equipment and reduces the maintenance cost. It can be directly added without stopping production, has a long retention time, and has a low investment cost.

[0016] 2. The main body of the biological carrier filler of the utility model is a hollow structure with a larger specific surface area than ordinary fillers, which provides sufficient space for the attachment and growth of microorganisms, making the microorganisms more active. At the same time, there are appropriate water and gas channels inside, which are conducive to biofilm formation and removal, thereby improving the treatment efficiency of organic matter, reducing sludge yield, and improving the transmission and utilization rate of oxygen, thereby effectively reducing energy consumption.

[0017] 3. The biological carrier filler of the utility model is also provided with three mutually reinforcing ribs at 90 degrees to each other, which has a more stable structure, is light and tough, does not deform after long-term use, has a long service life, is not severely worn, reduces the number of regular filler replenishments, and reduces operating costs.

[0018] 4. The material of the biological carrier filler body of the utility model is modified polyurethane gel, which can provide growth space for aerobic microorganisms, and has extremely high hydrophilicity and good fluidization effect. The special material makes the biological filler very flexible, and the wear is very small when colliding with equipment structures. The service life is long while reducing damage to the pool body.

[0019] 5. The skeleton and wall structure of the biological carrier filler of the utility model contain hydrophilic groups. When the carrier meets water, the gel absorbs water and expands, and the volume of the carrier becomes larger. The surface of the gel after absorbing water is an excellent place for microorganisms to attach and grow. It has good hydrophilicity and biological affinity, which is conducive to the reproduction of nitrifying bacteria and multiple strains. The biofilm period is short, which is very beneficial to the growth of microorganisms to treat sewage.

[0020] 6. The biological carrier filler of the utility model has an appropriate specific gravity after biofilm formation, and the carrier density is close to that of water after entering the water, which is easy to fluidize, reduces filler accumulation and water outlet blockage, avoids anaerobic phenomena in aerobic tanks, reduces risks, and is conducive to process stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the biological carrier filler of the utility model;

[0022] Figure 2 It is a microscopic structural schematic diagram of the porous wall structure of the biological carrier filler body of the utility model.

[0023] Explanation of the reference numerals: 10 - biological carrier body, 101 - reinforcing ribs, 20 - skeleton, 201 - wall structure, 202, 203 - pores. DETAILED DESCRIPTION

[0024] The following non-limiting examples can enable ordinary technicians in the field to more comprehensively understand the utility model, but do not limit the utility model in any way. The following content is only an exemplary description of the scope of protection claimed by the utility model. Those skilled in the art can make various changes and modifications to the utility model of the utility model based on the disclosed content, and they should also fall within the scope of protection claimed by the utility model.

[0025] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0026] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0027] The embodiments of the present application disclose a novel composite biological carrier filler, such as Figure 1 As shown, the biological carrier body 10 and the reinforcing ribs 101 arranged on the biological carrier 10 are included; the biological carrier body 10 is a hollow structure, and the structure is as follows Figure 2 As shown, it is composed of a frame 20 , a wall structure 201 attached to the frame 20 , and pores 202 and pores 203 on the wall 201 .

[0028] As an embodiment, the novel composite biological carrier filler has an overall spherical structure.

[0029] As an embodiment, the material of the biological carrier body is a modified polyurethane gel. Compared with other materials, this material can not only provide growth space for aerobic microorganisms, but also has extremely high hydrophilicity and flexibility, good fluidization effect, less wear when colliding with equipment structures, long service life, less damage to the pool body, and lower maintenance cost.

[0030] As an implementation mode, three reinforcing ribs 101 are provided and are arranged at 90 degrees to each other, so that the carrier filler has a more stable structure, is light and tough, does not deform during long-term use, and has a long service life.

[0031] As an implementation mode, the skeleton 20 and the wall structure 201 contain hydrophilic groups to provide growth space for aerobic microorganisms. The biological filler contains a hydrophilic gel component. The gel surface after absorbing water is an excellent place for microorganisms to attach and grow, with a high biofilm rate, good hydrophilicity and biological affinity.

[0032] As an embodiment, the pore structures are interconnected, the diameter of the pore structures is 1.1-1.3 nm, and the pore spacing is 1.3-1.7 nm.

[0033] As an embodiment, the diameter of the novel composite biological carrier filler is 18-22 mm, which is convenient for fluidization and interception without loss. The spherical shape makes the biological carrier more wear-resistant and has a longer service life, while reducing wear on the pool equipment and reducing operating and maintenance costs.

[0034] As an embodiment, the density of the novel composite biological carrier filler is 11.75-25.25 kg / m 3 .

[0035] As an embodiment, the novel composite biological carrier filler absorbs water immediately after entering the water, has a specific gravity of 1.0-1.03, which is greater than 1, is easy to fluidize, effectively reduces the occurrence of filler accumulation, avoids the occurrence of anaerobic zones in aerobic tanks, and is conducive to stable process operation.

[0036] When the carrier filler provided by the present application is used, the carrier filler is suspended in the sewage, and the microorganisms in the sewage are attached to the surface of the carrier filler. The large specific surface area provides sufficient growth space for the microorganisms and can quickly form a biofilm. The specific gravity of the carrier filler to water is close to 1, and the fluidization effect is good. In the process of sewage flowing through the biofilm attached to the surface of the carrier, the organic matter in the water can be fully absorbed, thereby undergoing biological oxidation and other effects to be removed. Anaerobic bacteria grow inside the filler to produce denitrification, and aerobic bacteria grow outside to decompose pollutants in the water.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel composite biological carrier filler, characterized in that: It comprises a biological carrier body (10) and reinforcing ribs (101) arranged on the outside of the biological carrier body (10); The biological carrier body (10) is a hollow structure; it is composed of a skeleton (20), a wall structure (201) attached to the skeleton (20), and a pore structure on the wall structure (201).

2. The novel composite biological carrier filler according to claim 1, characterized in that: The novel composite biological carrier filler is in a spherical structure as a whole.

3. The novel composite biological carrier filler according to claim 1, characterized in that: Three reinforcing ribs (101) are provided on the novel composite biological carrier filler, and the three reinforcing ribs (101) are arranged at 90 degrees to each other.

4. The novel composite biological carrier filler according to claim 1, characterized in that: The material of the biological carrier body (10) is modified polyurethane gel.

5. The novel composite biological carrier filler according to claim 1, characterized in that: The skeleton (20) and the wall structure (201) contain hydrophilic groups.

6. The novel composite biological carrier filler according to claim 1, characterized in that: The porous structure comprises pores (202) and (203), the diameter of the porous structure is 1.1-1.3 nm, and the pore spacing is 1.3-1.7 nm.

7. The novel composite biological carrier filler according to claim 1, characterized in that: Its shape is spherical, with a diameter of 18-22mm.

8. The novel composite biological carrier filler according to claim 1, characterized in that: The density of the novel composite biological carrier filler is 11.75-25.25 kg / m 3 .

9. The novel composite biological carrier filler according to claim 1, characterized in that: The novel composite biological carrier filler absorbs water immediately after entering water, and the specific gravity after absorbing water is 1.0-1.03.

Images