Preparation method of microbial carrier filler suitable for low temperature environment, microbial carrier filler and application thereof

Abstract

The embodiment of the application relates to the technical field of sewage treatment, in particular to a preparation method of a microbial carrier filler suitable for a low-temperature environment, a microbial carrier filler and application thereof. In the process of sewage treatment by the microbial carrier filler prepared by the method provided in the embodiment of the application, the carrier skeleton material is prone to generate charges through friction under the conditions of flowing with sewage and aeration flushing. The heat-generating microelectrode material serves as a heat-generating electrode, can convert the friction-generated charges into a micro-current, and generate heat. Meanwhile, there is a micro-electrolysis effect between the positive and negative electrodes of the heat-generating electrode, so that an oxidation-reduction reaction occurs in an oxygen environment, and chemical heat energy is released, so as to further improve the temperature of the core reaction zone of the carrier material, create a temperature environment suitable for the growth and reproduction of microorganisms for the microorganisms attached to the surface of the microbial carrier filler in a low-temperature condition, and improve the rate of microbial degradation and removal of pollutants in water.

Description

Technical Field

[0001] This application relates to the field of wastewater treatment technology, and in particular to a method for preparing a microbial carrier packing material suitable for low-temperature environments, the microbial carrier packing material suitable for low-temperature environments, and its application. Background Technology

[0002] my country experiences significant temperature variations across its regions, particularly in the colder northern areas, mostly located north of 40°N latitude. Winters are frigid, with freezing periods lasting 3-6 months, and minimum temperatures generally below -30°C. The average temperature of wastewater is below 10°C. Wastewater biochemical treatment processes involving microorganisms are highly sensitive to environmental conditions and easily affected by temperature changes. Low temperatures can impact the activity of enzymes within microbial cells, thus reducing their effectiveness in treating wastewater. Within a certain temperature range, microbial activity decreases by half for every 10°C decrease in temperature. The normal growth temperature for most microorganisms is between 20°C and 35°C. For example, nitrifying bacteria typically cease activity when the temperature drops below 5°C.

[0003] Low temperatures can inhibit the activity of microbial strains, and without artificial control, it is difficult to keep wastewater within the optimal temperature range for microbial activity. However, artificial temperature control consumes a significant amount of energy, increasing wastewater treatment costs. Summary of the Invention

[0004] To address the high energy consumption issue during wastewater treatment insulation, this application provides a method for preparing a microbial carrier packing material suitable for low-temperature environments. This material can convert external mechanical energy and its own chemical energy into heat energy, and can continuously generate heat through self-heating.

[0005] To address the aforementioned technical problems, the embodiments of this application provide the following technical solutions:

[0006] In a first aspect of this application, a method for preparing a microbial carrier filler suitable for low-temperature environments is provided. The method includes: dispersing a heating microelectrode material and a mineral additive in a carrier skeleton material in a molten state to obtain a molten mixture, wherein the carrier skeleton material is a thermoplastic polymer; placing the molten mixture and an elastic material in a molding die; and obtaining the microbial carrier filler after the molten mixture has cooled and solidified in the molding die.

[0007] In the embodiments of this application, during wastewater treatment using the microbial carrier packing material, the carrier skeleton material easily generates electrical charges through friction under conditions such as wastewater flow and aeration. The heating microelectrode material, acting as the heating electrode, converts the frictional charges into a microcurrent and generates heat. Simultaneously, a micro-electrolysis occurs between the positive and negative electrodes of the heating electrode, resulting in a redox reaction in an aerobic environment and releasing chemical heat energy. This further increases the temperature of the core reaction zone of the carrier material, creating a suitable temperature environment for the growth and reproduction of microorganisms attached to the surface of the microbial carrier packing material under low-temperature conditions, thereby increasing the rate of microbial degradation and removal of pollutants from the water.

[0008] In some embodiments, the thermoplastic polymer material includes at least one of polytetrafluoroethylene, polyimide, polyurethane, and polymethyl methacrylate.

[0009] In some embodiments, the heating microelectrode material includes iron powder, aluminum powder, activated carbon powder, and anthracite powder.

[0010] In some embodiments, the mass ratio of the iron powder, the aluminum powder, the activated carbon powder, and the anthracite powder is in the range of (6-10):(1-2):(2-4):(1-2).

[0011] In some embodiments, the mineral additives include diatomite powder, pyrite powder, volcanic rock powder, and sepiolite powder.

[0012] In some embodiments, the mass ratio of the diatomite powder, the pyrite powder, the volcanic rock powder, and the sepiolite powder is in the range of (2-3):(1-2):(1-2):(2-3).

[0013] In some embodiments, the elastic material includes at least one of helical spring steel, rubber, or polyurea.

[0014] In some embodiments, the mass ratio of the carrier skeleton material, the heating microelectrode material, the mineral additive and the elastic material is in the range of (10-20):(5-10):(3-5):(1-2).

[0015] In a second aspect of this application, a microbial carrier packing material suitable for low-temperature environments is also provided, which is prepared according to the method described in the first aspect.

[0016] In a third aspect of this application, the application of a microbial carrier packing material suitable for low-temperature environments prepared according to the method described in the first aspect is provided in wastewater treatment.

[0017] It should be understood that the description in the Summary of the Invention section is not intended to limit the key or essential features of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments of the present invention will be briefly described below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0019] Figure 1 This application provides a method for preparing a microbial carrier packing material suitable for low-temperature environments, as one embodiment of the present application. Detailed Implementation

[0020] The principles and spirit of this disclosure will be described below with reference to several exemplary embodiments illustrated in the accompanying drawings. It should be understood that these specific embodiments are described merely to enable those skilled in the art to better understand and implement this disclosure, and are not intended to limit the scope of this disclosure in any way. In the following description and claims, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art.

[0021] As used herein, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "an embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc., may refer to different or the same objects and are used only to distinguish the objects referred to, without implying a particular spatial order, temporal order, order of importance, etc., of the objects referred to.

[0022] In microbial-dominated biological nitrogen and phosphorus removal processes, increasing the reaction temperature and the activity of microorganisms in low-temperature environments are effective ways to improve nitrogen and phosphorus removal efficiency. Currently, to ensure the normal operation of wastewater biological treatment processes under low-temperature conditions, wastewater treatment plants employ heating and insulation measures to maintain the wastewater temperature within a suitable range, thereby preserving microbial activity. These measures can include, for example, ground source heat pumps, solar energy, and other heating technologies. However, these measures significantly increase the equipment and operating costs involved in wastewater treatment.

[0023] To address the problems of low nitrogen and phosphorus removal efficiency in biochemical treatment processes under low-temperature conditions, high energy consumption of conventional insulation measures, and complex and poorly adaptable screening and cultivation processes for low-temperature bacteria, this application provides a method for preparing a microbial carrier packing suitable for low-temperature environments. This method produces a self-heating microbial carrier packing. The triboelectric material in the carrier packing excites the electrode material to generate heat, which is then accumulated within the carrier material under the influence of hydraulic flow and aeration. This heat increases the temperature of the active reaction zone of the microorganisms loaded on the carrier material, maintaining the attached microorganisms within a suitable temperature range. This enhances the biological activity of the microorganisms in low-temperature wastewater environments, achieving economical and efficient nitrogen and phosphorus removal in low-temperature water conditions. To facilitate understanding of this application, specific embodiments are described below.

[0024] This application provides a method for preparing a microbial carrier packing material suitable for low-temperature environments. Exemplarily, Figure 1 A flowchart for preparing microbial carrier packing materials suitable for low-temperature environments is provided; please refer to [link / reference]. Figure 1 The method includes the following steps:

[0025] Step 11: Disperse the heating microelectrode material and mineral additives in the carrier skeleton material in a molten state to obtain a molten mixture.

[0026] In the embodiments of this application, the carrier skeleton material is a thermoplastic polymer material. In some embodiments, step 11 is specifically as follows: after heating the carrier skeleton material to a molten state, a heating microelectrode material and a mineral additive are added to the molten carrier skeleton material, and then the heating microelectrode material and the mineral additive are evenly dispersed in the molten carrier skeleton material by means of rapid stirring, etc., to obtain a molten mixture. The molten mixture refers to the mixture of the heating microelectrode material, the mineral additive, and the carrier skeleton material in the molten state.

[0027] In some embodiments, the carrier skeleton material specifically includes at least one selected from polytetrafluoroethylene, polyimide, polyurethane, and polymethyl methacrylate. In the embodiments of this application, a thermoplastic polymer material with high triboelectric negativity in the triboelectric series is used as the skeleton material of the microbial carrier material, thereby easily generating a charge through friction when the carrier skeleton material flows with the water in the wastewater and is washed by aeration. Simultaneously, these carrier skeleton materials exhibit good temperature resistance, biocompatibility, aging resistance, and electrical insulation; wherein, the electrical insulation property allows the charge generated by friction to be maintained for a long time, for example, for several hours or even several days.

[0028] In some embodiments, the heating microelectrode material includes iron powder, aluminum powder, activated carbon powder, and anthracite powder. The heating microelectrode material acts as the heating electrode of the microbial carrier packing; wherein, iron powder and aluminum powder are the negative electrodes of the heating electrode; and activated carbon powder and anthracite powder are the positive electrodes of the heating electrode. The heating electrode can convert the charge generated by friction of the carrier skeleton material into a microcurrent; simultaneously, there is a micro-electrolysis effect between the positive and negative electrodes of the heating electrode. Through micro-electrolysis, an oxidation-reduction reaction occurs in an aerobic environment, releasing chemical heat energy, thereby further increasing the temperature of the core reaction zone of the microbial carrier packing. This creates a temperature environment suitable for the growth and reproduction of microorganisms attached to the surface of the microbial carrier material under low-temperature conditions, increasing the rate of microbial degradation and removal of pollutants in water. Furthermore, the metallic element iron can enhance the activity of microbial enzymes, further strengthening the removal effect of microorganisms on pollutants.

[0029] Specifically, in some embodiments, to further improve the self-heating effect of the microbial carrier filler, the mass ratio of iron powder, aluminum powder, activated carbon powder, and anthracite powder is (6-10):(1-2):(2-4):(1-2). In some embodiments of this application, the particle size of the heating microelectrode material is 5µm-50µm.

[0030] In some embodiments, the mineral additives include diatomaceous earth powder, pyrite powder, volcanic rock powder, and sepiolite powder. Diatomaceous earth powder has a porous structure, which increases the specific surface area of ​​the microbial carrier filler, promoting microbial biofilm growth. The sulfur in pyrite powder promotes microbial denitrification, while the iron in pyrite powder enhances phosphorus removal. Volcanic rock powder generates a large amount of infrared radiation, further stimulating the heat generation of the heating microelectrode material. Sepiolite powder has excellent heat retention properties, extending the self-heating time of the carrier filler. Simultaneously, sepiolite powder also possesses good adsorption and rheological properties, improving the flexibility of the carrier material.

[0031] Specifically, in some embodiments, to further improve the overall performance of the microbial carrier filler, the mass ratio of diatomaceous earth powder, pyrite powder, volcanic rock powder, and sepiolite powder is (2-3):(1-2):(1-2):(2-3). In some embodiments of this application, the particle size of the mineral additives is 200 mesh to 300 mesh.

[0032] Step 12: Place the molten mixture and the elastic material into the molding die.

[0033] Step 13: After the molten mixture cools and solidifies in the molding die, the microbial carrier filler is obtained.

[0034] In embodiments of this application, both the molten mixture and the elastic material can be placed in a molding die. After the molten mixture cools and solidifies in the die, a microbial carrier filler is obtained. Embodiments of this application do not restrict the order in which the molten mixture and the elastic material are added to the molding die. For example, in some embodiments, the elastic material can be added to the molding die first, followed by the molten mixture; in other embodiments, the molten mixture can be injected into the molding die first, followed by the elastic material; in still other embodiments, the molten mixture and the elastic material can be placed in the molding die simultaneously. The microbial carrier filler can be prepared into any suitable shape using the molding die. In some embodiments, the microbial carrier filler is spherical, and the diameter of the sphere is 10 mm to 30 mm.

[0035] In some embodiments, the elastic material is at least one of helical spring steel, rubber, or polyurea. The elastic material amplifies the deformation of the microbial carrier packing caused by hydraulic flow and aeration, increasing the internal friction amplitude, which is beneficial for generating more triboelectric charges within the packing and promoting the generation of more heat. Simultaneously, the elastic material has self-restoring properties, making the carrier material less prone to damage during collisions and friction.

[0036] In some embodiments, in order to further improve the overall performance of the microbial carrier packing material, the mass ratio of the carrier skeleton material, the heating microelectrode material, the mineral additive and the elastic material is in the range of (10-20):(5-10):(3-5):(1-2).

[0037] In some embodiments, the preparation method of the microbial carrier filler includes the following steps: 10g-20g of carrier skeleton material is heated and melted at 100℃-400℃; 5g-10g of microelectrode material is added to the melted material, and the microelectrode material is uniformly dispersed in the molten carrier skeleton material by rapid stirring; then 3g-5g of mineral additive is added to the molten carrier skeleton material, and the microelectrode material, mineral additive, and molten carrier skeleton material are mixed evenly to form a homogeneous molten mixture. The molten mixture is injected into at least one spherical mold with a radius of 10mm-30mm, and an elastic material is added to each spherical mold, immersing the elastic material in the molten mixture. After the molten mixture cools to room temperature and sets, it is demolded to obtain the microbial carrier filler.

[0038] This application also provides a microbial carrier packing material suitable for low-temperature environments, prepared using the above-described method. This microbial carrier packing material can support any suitable microorganisms for wastewater treatment, such as microorganisms for low-temperature nitrogen and phosphorus removal. This microbial carrier packing material can be applied to moving bed biofilm reactor (MBBR) wastewater treatment processes in low-temperature regions. In the MBBR wastewater treatment process, the carrier skeleton material in the wastewater easily generates electrical charges through friction under conditions of water flow and aeration. The heating microelectrode material, acting as the heating electrode, can convert the frictional charges into microcurrents and generate heat. Simultaneously, a micro-electrolysis effect exists between the positive and negative electrodes of the heating electrode, resulting in a redox reaction under aerobic conditions and releasing chemical heat energy. This further increases the temperature of the core reaction zone of the carrier material, creating a temperature environment suitable for the growth and reproduction of microorganisms attached to the surface of the microbial carrier packing material under low-temperature conditions, thereby increasing the rate of microbial degradation and removal of pollutants from the water. The porous structure of mineral additives can improve the microbial loading effect and increase the microbial load. Sulfur can promote microbial denitrification, and iron can improve microbial enzyme activity, which can enhance the phosphorus removal effect and improve the tolerance of microorganisms in low-temperature water environments, thus achieving economical and efficient denitrification and phosphorus removal in low-temperature water environments.

[0039] This application also provides an application of a microbial carrier packing material suitable for low-temperature environments prepared using the above-described preparation method in wastewater treatment.

[0040] Several embodiments of this application are provided below.

[0041] Example 1

[0042] The specific preparation process of microbial carrier packing material suitable for low-temperature environments is as follows:

[0043] (1) Melt 20g of carrier skeleton material (polytetrafluoroethylene) at 330℃;

[0044] (2) Add 10g of heating microelectrode material to the molten carrier skeleton material. The heating microelectrode material includes iron powder, aluminum powder, activated carbon powder and anthracite in a mass ratio of 6:1:2:1. Stir quickly and evenly to make the heating microelectrode material uniformly dispersed in the molten carrier skeleton material.

[0045] (3) Add 5g of mineral additive to the molten carrier skeleton material. The mineral additive includes diatomite powder, pyrite powder, volcanic rock powder and sepiolite powder in a mass ratio of 2:1:1:2. Mix the heating microelectrode material, mineral additive and molten carrier skeleton material evenly to form a molten mixture.

[0046] (4) Pour the molten mixture into at least one spherical mold with a radius of 20 mm, and add 1 g of elastic material (spiral spring steel) to each spherical mold;

[0047] (5) After the molten mixture in the mold cools to room temperature and solidifies, it is demolded to obtain a self-heating microbial carrier filler.

[0048] Example 2

[0049] The specific preparation process of microbial carrier packing material suitable for low-temperature environments is as follows:

[0050] (1) Melt 20g of carrier skeleton material (polyimide) at 330℃;

[0051] (2) Add 10g of heating microelectrode material to the molten carrier skeleton material. The heating microelectrode material includes iron powder, aluminum powder, activated carbon powder and anthracite in a mass ratio of 6:1:2:1. Stir quickly and evenly to make the heating microelectrode material uniformly dispersed in the molten carrier skeleton material.

[0052] (3) Add 5g of mineral additive to the molten carrier skeleton material. The mineral additive includes diatomite powder, pyrite powder, volcanic rock powder and sepiolite powder in a mass ratio of 2:1:1:2. Mix the heating microelectrode material, mineral additive and molten carrier skeleton material evenly to form a molten mixture.

[0053] (4) Pour the molten mixture into at least one spherical mold with a radius of 20 mm, and add 1 g of elastic material (spiral spring steel) to each spherical mold;

[0054] (5) After the molten mixture in the mold cools to room temperature and solidifies, it is demolded to obtain a self-heating microbial carrier filler.

[0055] Example 3

[0056] The specific preparation process of microbial carrier packing material suitable for low-temperature environments is as follows:

[0057] (1) Melt 20g of carrier skeleton material (polyurethane) at 200℃;

[0058] (2) Add 10g of heating microelectrode material to the molten carrier skeleton material. The heating microelectrode material includes iron powder, aluminum powder, activated carbon powder and anthracite in a mass ratio of 6:1:2:1. Stir quickly and evenly to make the heating microelectrode material uniformly dispersed in the molten carrier skeleton material.

[0059] (3) Add 5g of mineral additive to the molten carrier skeleton material. The mineral additive includes diatomite powder, pyrite powder, volcanic rock powder and sepiolite powder in a mass ratio of 2:1:1:2. Mix the heating microelectrode material, mineral additive and molten carrier skeleton material evenly to form a molten mixture.

[0060] (4) Pour the molten mixture into at least one spherical mold with a radius of 20 mm, and add 1 g of elastic material (spiral spring steel) to each spherical mold;

[0061] (5) After the molten mixture in the mold cools to room temperature and solidifies, it is demolded to obtain a self-heating microbial carrier filler.

[0062] Example 4

[0063] The specific preparation process of microbial carrier packing material suitable for low-temperature environments is as follows:

[0064] (1) Melt 20g of carrier skeleton material (polymethyl methacrylate) at 160℃;

[0065] (2) Add 10g of heating microelectrode material to the molten carrier skeleton material. The heating microelectrode material includes iron powder, aluminum powder, activated carbon powder and anthracite in a mass ratio of 6:1:2:1. Stir quickly and evenly to make the heating microelectrode material uniformly dispersed in the molten carrier skeleton material.

[0066] (3) Add 5g of mineral additive to the molten carrier skeleton material. The mineral additive includes diatomite powder, pyrite powder, volcanic rock powder and sepiolite powder in a mass ratio of 2:1:1:2. Mix the heating microelectrode material, mineral additive and molten carrier skeleton material evenly to form a molten mixture.

[0067] (4) Pour the molten mixture into at least one spherical mold with a radius of 20 mm, and add 1 g of elastic material (spiral spring steel) to each spherical mold;

[0068] (5) After the molten mixture in the mold cools to room temperature and solidifies, it is demolded to obtain a self-heating microbial carrier filler.

[0069] Example 5

[0070] The specific preparation process of microbial carrier packing material suitable for low-temperature environments is as follows:

[0071] (1) Melt 20g of carrier skeleton material (polytetrafluoroethylene) at 330℃;

[0072] (2) Add 10g of heating microelectrode material to the molten carrier skeleton material. The heating microelectrode material includes iron powder, aluminum powder, activated carbon powder and anthracite in a mass ratio of 6:1:2:1. Stir quickly and evenly to make the heating microelectrode material uniformly dispersed in the molten carrier skeleton material.

[0073] (3) Add 5g of mineral additive to the molten carrier skeleton material. The mineral additive includes diatomite powder, pyrite powder, volcanic rock powder and sepiolite powder in a mass ratio of 2:1:1:2. Mix the heating microelectrode material, mineral additive and molten carrier skeleton material evenly to form a molten mixture.

[0074] (4) Pour the molten mixture into at least one spherical mold with a radius of 20 mm, and add 1 g of elastic material (rubber) to each spherical mold;

[0075] (5) After the molten mixture in the mold cools to room temperature and solidifies, it is demolded to obtain a self-heating microbial carrier filler.

[0076] Example 6

[0077] The specific preparation process of microbial carrier packing material suitable for low-temperature environments is as follows:

[0078] (1) Melt 20g of carrier skeleton material (polytetrafluoroethylene) at 330℃;

[0079] (2) Add 10g of heating microelectrode material to the molten carrier skeleton material. The heating microelectrode material includes iron powder, aluminum powder, activated carbon powder and anthracite in a mass ratio of 6:1:2:1. Stir quickly and evenly to make the heating microelectrode material uniformly dispersed in the molten carrier skeleton material.

[0080] (3) Add 5g of mineral additive to the molten carrier skeleton material. The mineral additive includes diatomite powder, pyrite powder, volcanic rock powder and sepiolite powder in a mass ratio of 2:1:1:2. Mix the heating microelectrode material, mineral additive and molten carrier skeleton material evenly to form a molten mixture.

[0081] (4) Inject the molten mixture into at least one spherical mold with a radius of 20 mm, and add 1 g of elastic material (polyurea) to each spherical mold;

[0082] (5) After the molten mixture in the mold cools to room temperature and solidifies, it is demolded to obtain a self-heating microbial carrier filler.

[0083] Comparative Example 1

[0084] The difference between the preparation process of the microbial carrier packing material provided in Comparative Example 1 and Example 1 is that no heating microelectrode material is added in step (2).

[0085] Comparative Example 2

[0086] The difference between the preparation process of the microbial carrier packing material provided in Comparative Example 2 and Example 1 is that no mineral additives are added in step (3).

[0087] The experimental procedure is as follows: The microbial carrier packing materials provided in Examples 1-6 and Comparative Examples 1 and 2 were all applied to the MBBR biochemical treatment process in low-temperature areas. Eight groups of 1L low-temperature wastewater (water temperature around 10℃) containing activated sludge (ammonia nitrogen around 50mg / L, total phosphorus around 2.0mg / L) were taken from the aerobic tank of a wastewater treatment plant in a northern low-temperature area. 10g of the microbial carrier packing materials provided in Examples 1-6 and Comparative Examples 1 and 2 for low-temperature nitrogen and phosphorus removal were added to each group. Aeration and mechanical stirring were then performed to fully agitate the microbial carrier packing materials in the low-temperature wastewater, and the wastewater was circulated for 7 days. After the microbial carrier packing materials for low-temperature nitrogen and phosphorus removal had completed biofilm formation, continuous influent was introduced. The removal effects of ammonia nitrogen and total phosphorus in Examples 1-6 and Comparative Examples 1 and 2 are shown in Tables 1 and 2.

[0088] Table 1. Ammonia nitrogen removal efficiency of microbial carrier packing materials provided in different embodiments.

[0089]

[0090] Table 2. Total phosphorus removal efficiency of microbial carrier packing materials provided in different embodiments.

[0091]

[0092] As shown in Tables 1 and 2, compared with Comparative Examples 1 and 2, the microbial carrier packing materials of Examples 1-6 significantly improved the removal efficiency of ammonia nitrogen and total phosphorus in the MBBR biochemical treatment process. The reasons are as follows: First, the heating microelectrode material in the microbial carrier packing materials of Examples 1-6 can convert the charge generated by friction into microcurrent, generating heat. Second, there is a micro-electrolysis effect between the positive and negative electrodes of the heating microelectrode material, which can undergo an oxidation-reduction reaction in an aerobic environment to release chemical heat energy, further increasing the temperature of the core reaction zone of the carrier material. This creates a temperature environment suitable for the growth and reproduction of microorganisms attached to the surface of the carrier material under low-temperature conditions, increasing the rate of microbial degradation and removal of pollutants in the water. Third, the porous structure of the mineral additives can improve the microbial loading effect and increase the microbial load. Furthermore, the sulfur element in the mineral additives can promote microbial denitrification, and the iron element can increase microbial enzyme activity, thereby enhancing the phosphorus removal effect and improving the tolerance of microorganisms in low-temperature water environments, achieving economical and efficient nitrogen and phosphorus removal in low-temperature water environments.

[0093] Compared to Examples 2-6, the microbial carrier packing provided in Example 1 has a better removal effect on ammonia nitrogen and total phosphorus, for the following reasons: First, the carrier skeleton material used in the microbial carrier packing of Example 1 is polytetrafluoroethylene, while the carrier skeleton materials in Examples 2-6 are polyimide, polyurethane, and polymethyl methacrylate, respectively; polytetrafluoroethylene has a higher triboeity than polyimide, polyurethane, and polymethyl methacrylate, making it easier to generate triboelectric charge and generate heat; second, the elastic material used in Example 1 is helical spring steel, which has better elastic properties than rubber and polyurea.

[0094] The microbial carrier packing provided in this application can convert external mechanical energy and its own chemical energy into heat energy, continuously generating heat through self-heating. In low-temperature wastewater environments (water temperature below 10℃), the temperature of the core reaction zone of the microbial carrier packing can be maintained within the range of 15℃ to 25℃; this not only improves the reactivity of microorganisms but also enhances the removal rate of pollutants such as nitrogen and phosphorus. Simultaneously, the microbial carrier packing provided in this application is easily fluidized under aeration conditions. During fluidization, the microbial carrier materials rub and collide with each other, and the resulting mechanical energy is converted into heat energy within the microbial carrier packing. Furthermore, the heating microelectrode material of the microbial carrier packing can utilize the oxygen generated by aeration to release heat energy through a chemical reaction, maintaining the core reaction zone of the microbial carrier material within a suitable temperature range for microbial growth and reproduction.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of brevity; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a microbial carrier packing material suitable for low-temperature environments, characterized in that, The method includes: The heating microelectrode material and mineral additives are dispersed in a carrier skeleton material in a molten state to obtain a molten mixture, wherein the carrier skeleton material is a thermoplastic polymer material; Both the molten mixture and the elastic material are placed in a molding die; After the molten mixture cools and solidifies in the molding die, the microbial carrier filler is obtained; The thermoplastic polymer material includes at least one of polytetrafluoroethylene, polyimide, polyurethane, and polymethyl methacrylate. The heating microelectrode material includes iron powder, aluminum powder, activated carbon powder, and anthracite powder; The mineral additives include diatomite powder, pyrite powder, volcanic rock powder, and sepiolite powder; The elastic material includes at least one of helical spring steel, rubber, or polyurea.

2. The method according to claim 1, characterized in that, The mass ratio of the iron powder, the aluminum powder, the activated carbon powder and the anthracite powder is (6~10):(1~2):(2~4):(1~2).

3. The method according to claim 1, characterized in that, The mass ratio of the diatomite powder, the pyrite powder, the volcanic rock powder and the sepiolite powder is (2~3):(1~2):(1~2):(2~3).

4. The method according to any one of claims 1-3, characterized in that, The mass ratio of the carrier skeleton material, the heating microelectrode material, the mineral additive and the elastic material is (10~20):(5~10):(3~5):(1~2).

5. A microbial carrier packing material suitable for low-temperature environments, characterized in that, The microbial carrier packing material is prepared according to any one of claims 1-4.

6. The application of a microbial carrier packing material suitable for low-temperature environments prepared by the method according to any one of claims 1-4 in wastewater treatment.

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