A livestock and poultry waste resource water treatment catalyst and its preparation method and application

Abstract

The present invention relates to the technical field of water pollution control, especially to a kind of livestock and poultry waste resource water treatment catalyst and its preparation method and application, comprise the following steps: add precursor solution to dried pigeon droppings and carry out impregnation, carry out evaporate to dryness, dry successively after impregnation is completed, obtain catalyst precursor; Catalyst precursor is pyrolyzed, and after pyrolysis is completed, carry out grinding, centrifugal washing and drying successively, obtain livestock and poultry waste resource water treatment catalyst; Wherein, the precursor solution is any one or two kinds of aqueous solution of glucose and urea. The raw material used in the present invention is livestock and poultry excrement, and raw material is cheap and easy to obtain, and the catalyst obtained can be used for activating persulfate to produce singlet oxygen, efficiently treats organic pollutants in water, including difficult-to-treat new pollutants tetracycline (TC) and ciprofloxacin (CIP), only needs to add trace persulfate to achieve excellent treatment effect.

Description

Technical Field

[0001] The present invention relates to the technical field of water pollution control, and in particular to a livestock and poultry waste resource water treatment catalyst, a preparation method and an application thereof. Background Art

[0002] At present, high energy consumption and low efficiency of the treatment process have always been a difficult problem in treating sewage and wastewater, which requires a lot of manpower and material resources. Therefore, there is an urgent need to develop low-cost and high-efficiency water treatment technologies and methods.

[0003] Livestock and poultry manure is produced in large quantities. Conventional treatment methods primarily rely on composting, which takes a long time, requires a large area, produces odor, and has low utilization rates. Pigeon manure is inexpensive and readily available, rich in organic and inorganic matter, and contains a large number of nutrients found in pigeon feed. It is rich in carbon, nitrogen, phosphorus, calcium, iron, and other elements, making it an excellent raw material for preparing water treatment catalysts.

[0004] Using pigeon droppings as raw material to prepare water treatment catalysts not only recycles waste into resources but also efficiently purifies wastewater. This waste-to-waste water treatment technology not only rationally recycles waste into resources but also significantly reduces water treatment costs, reaping both ecological and economic benefits.

[0005] Chinese invention patent CN 113828361 A discloses a waste-to-resource catalyst, its preparation method, and its application in treating organic pollutants. The catalyst uses chicken manure as raw material, obtained by air-drying, pulverizing, and pyrolyzing the manure, followed by dehydration, condensation, and reduction. While the catalyst activates persulfate to produce sulfate radicals, which can degrade organic pollutants in water and purify wastewater, the catalyst requires a high persulfate concentration and a long purification time, limiting its application in treating organic pollutants in wastewater.

[0006] In view of this, the present invention is proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide a livestock and poultry waste resource water treatment catalyst and its preparation method and application. The catalyst only needs to activate a trace amount of persulfate to achieve a high efficiency treatment effect, and has good catalytic effect, high wastewater treatment effect, good stability and long service life.

[0008] In a first aspect, the present invention provides a method for preparing a livestock and poultry waste resource water treatment catalyst, comprising the following steps:

[0009] S1, adding the precursor solution to the dried pigeon droppings for impregnation, and then evaporating and drying the dried pigeon droppings to obtain a catalyst precursor;

[0010] S2, pyrolyzing the catalyst precursor, and then grinding, centrifugally washing, and drying in sequence after the pyrolysis is completed to obtain a livestock and poultry waste resource water treatment catalyst;

[0011] Wherein, the precursor solution is an aqueous solution of either one or both of glucose and urea.

[0012] During the preparation process of the livestock and poultry waste resource water treatment catalyst of the present invention, pigeon manure is first dried, and then the dried pigeon manure is immersed in a precursor solution of glucose, urea, etc., so that substances such as glucose or urea are evenly loaded on the surface of the pigeon manure. After evaporation and drying, and heating with carbon elements in the pigeon manure, a graphene-like substrate is formed. After induction by metal elements such as calcium and iron in the pigeon manure, the graphene-like substrate and the metal ions form a cationic π structure, thereby forming an active catalytic site with uneven electron distribution. The active catalytic site has the ability to activate persulfate to produce singlet oxygen.

[0013] The reason why the present invention uses either or both of glucose and urea as the precursor impregnation liquid is that the addition of the precursor carbon element can increase the content of ordered carbon and promote the formation of a graphene-like substrate during the pyrolysis process; the addition of the precursor nitrogen element further regulates the electron distribution of the graphene-like substrate, enhances the electronic polarization of the active sites, and thus enhances the catalyst activity.

[0014] Therefore, the livestock and poultry waste resource water treatment catalyst prepared by the present invention can be used in combination with persulfate to degrade various pollutants in water and can achieve the effect of purifying wastewater in a short time.

[0015] As a preferred embodiment of the present technical solution, in step S1, during the drying, the pigeon droppings are dried to a moisture content of less than 10%, which can be done by methods such as outdoor sun drying or wind blowing.

[0016] After the pigeon droppings are dried, the pigeon droppings can be further screened to remove impurities such as gravel and feathers. The screen is preferably a 60-100 mesh screen.

[0017] As a preferred embodiment of the present technical solution, in step S1, during the impregnation, the solid-liquid impregnation ratio of the dried pigeon droppings to the precursor solution is controlled to be 1g:(1-20)mL, and preferably 1:(10-20)mL, wherein the concentration of the precursor solution is 0.1-10mmol / L, and preferably 5-10mmol / L.

[0018] As a preferred embodiment of the present technical solution, in step S1, during the evaporation, the impregnated system is placed in a water bath and stirred and evaporated to remove most of the moisture, wherein the temperature of the water bath is 60-80°C; the stirred and evaporated system is further placed in an oven for drying to obtain a dry catalyst precursor, wherein the temperature of the oven is 60-100°C.

[0019] Pigeon manure loaded with glucose or urea precursors is further placed in a muffle furnace for pyrolysis, so that the precursors such as glucose and urea are co-heated with the carbon elements of the pigeon manure to form a graphene-like substrate, and under the induction of metal elements such as calcium and iron in the pigeon manure, a cationic π structure is formed, constituting an active catalytic site with uneven electron distribution, so that the prepared catalyst has the ability to activate persulfate to produce singlet oxygen. The specific conditions of the pyrolysis are first pyrolysis at 500-600°C for 30-60 minutes, and then programmed to heat up to 600-800°C for 30-60 minutes, with a heating rate of 5-10°C / min.

[0020] Further research shows that the optimal conditions for pyrolysis of the present invention are pyrolysis at 600°C for 60 minutes, maintaining pyrolysis at 600°C for another 60 minutes, and a heating rate of 5°C / min.

[0021] After the pyrolysis is completed, the catalyst is further ground using a mortar and pestle until there is no obvious granularity; during the centrifugal washing, water or other agents that can replace clean water, such as ethanol and other solvents, are used for cleaning, and centrifugation is performed 3-5 times, wherein the speed of the centrifuge is controlled to be 8000-10000 rpm during centrifugation.

[0022] Secondly, the present invention also discloses a livestock and poultry waste resource water treatment catalyst prepared by the above preparation method. The catalyst only needs to activate a trace amount of persulfate to achieve a high efficiency treatment effect, and should also fall within the scope of protection of the present invention.

[0023] Thirdly, the present invention also discloses the application of the livestock and poultry waste resource water treatment catalyst prepared by the above preparation method in combination with persulfate in the treatment of wastewater containing organic pollutants, which should also fall within the scope of protection of the present invention.

[0024] The organic pollutants include any one or both of tetracycline and ciprofloxacin, and the concentration of the organic pollutants is 0.5-10 mg / L.

[0025] Furthermore, research has shown that when the livestock and poultry waste resource water treatment catalyst of the present invention is used with persulfate in the treatment of wastewater containing organic pollutants, the concentration of the livestock and poultry waste resource water treatment catalyst in the wastewater is preferably controlled at 0.05-1g / L, and the concentration of persulfate in the wastewater is preferably controlled at 0.05-0.2mmol / L. This indicates that the catalyst significantly reduces the amount of reagents used and significantly reduces the cost of treating organic pollutants in wastewater.

[0026] The livestock and poultry waste resource water treatment catalyst of the present invention has at least the following beneficial technical effects:

[0027] 1. In the preparation process of the livestock and poultry waste resource water treatment catalyst of the present invention, the pigeon manure is first dried, and then the dried pigeon manure is immersed in a precursor solution of glucose or urea, so that the glucose or urea substance is evenly loaded on the surface of the pigeon manure. After evaporation, drying and heating with the pigeon manure carbon element, a graphene-like substrate is formed. After the induction of metal elements such as calcium and iron in the pigeon manure, the graphene-like substrate and the metal ions form a cationic π structure, thereby forming an active catalytic site with uneven electron distribution. The active catalytic site has the ability to activate persulfate to produce singlet oxygen. Therefore, the livestock and poultry waste resource water treatment catalyst prepared by the present invention can be used in combination with persulfate to degrade various pollutants in water, and can achieve the effect of purifying wastewater in a short time;

[0028] 2. The raw material used in the present invention is livestock and poultry manure, which is cheap and easily available. The catalyst prepared can be used to treat organic pollutants in sewage, treating waste with waste, effectively alleviating the pressure of environmental remediation and saving resources and energy. In addition, the preparation method is simple in process, highly operable, and has low production and preparation costs.

[0029] 3. The catalyst prepared by the present invention only needs to activate a trace amount of persulfate to achieve efficient treatment effect, and has good catalytic effect, high wastewater treatment effect, good stability, long service life and low wastewater treatment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 This is a scanning electron microscope (SEM) image of the livestock and poultry waste resource water treatment catalyst of the present invention;

[0032] Figure 2This is the degradation curve of ciprofloxacin (CIP) by the livestock and poultry waste resource water treatment catalyst of the present invention;

[0033] Figure 3 The degradation curves of tetracycline (TC) and ciprofloxacin (CIP) by the livestock and poultry waste resource water treatment catalyst of the present invention are shown in FIG.

[0034] Figure 4 The fixed bed reactor of the livestock and poultry waste resource water treatment catalyst of the present invention;

[0035] Figure 5 This is a stability diagram of the livestock and poultry waste resource water treatment catalyst of the present invention continuously degrading tetracycline (TC). DETAILED DESCRIPTION

[0036] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0037] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular also includes the plural. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0038] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example 1

[0040] S11, placing fresh pigeon droppings outdoors to dry naturally for 24 hours, and after drying, crushing through an 80-mesh sieve to remove gravel and feathers to obtain dried pigeon droppings; adding 100 mL of a 5 mmol / L glucose solution to 10 g of the dried pigeon droppings, and then transferring the mixture to a 70°C water bath with stirring and evaporating to dryness, and then transferring the mixture to a 100°C oven to dry to obtain a catalyst precursor;

[0041] S12. Place 10 g of the catalyst precursor in a muffle furnace for pyrolysis and carbonization treatment, pyrolyze at 600°C for 60 min, maintain 600°C for another 60 min, and heat up at a rate of 5°C / min. After the pyrolysis is completed, grind it in a mortar until there is no obvious granularity. Wash it with water, centrifuge it at 8000 rpm for 3 times, and dry it in a 100°C oven for 12 h to obtain a livestock and poultry waste resource water treatment catalyst.

[0042] Example 2

[0043] S21, the fresh pigeon droppings were placed outdoors to dry naturally for 24h, and after drying, they were crushed through an 80-mesh sieve to remove gravel and feathers to obtain dried pigeon droppings; 100mL of 5mmol / L urea solution was added to 10g of the dried pigeon droppings, and then the mixture was transferred to a 70°C water bath with stirring and evaporated to dryness, and then transferred to a 100°C oven for drying to obtain a catalyst precursor;

[0044] S22. Place 10g of the catalyst precursor in a muffle furnace for pyrolysis and carbonization treatment, pyrolyze at 600℃ for 60min, maintain 600℃ for another 60min, and heat up at a rate of 5℃ / min. After the pyrolysis is completed, grind it in a mortar until there is no obvious granularity. Wash it with water, centrifuge it at 8000rpm for 3 times, and dry it in an oven at 100℃ for 12h to obtain a livestock and poultry waste resource water treatment catalyst.

[0045] Example 3

[0046] S31, placing fresh pigeon droppings outdoors to dry naturally for 24h, crushing them through an 80-mesh sieve after drying to remove gravel and feathers to obtain dried pigeon droppings; adding 10mL of a 10mmol / L glucose solution to 10g of the dried pigeon droppings, then transferring them to a 70°C water bath with stirring and evaporating them to dryness, and then transferring them to a 100°C oven to dry them to obtain a catalyst precursor;

[0047] S32. Place 10g of the catalyst precursor in a muffle furnace for pyrolysis and carbonization treatment, pyrolyze at 500℃ for 60min, then heat to 800℃ for 30min, with a heating rate of 10℃ / min. After the pyrolysis is completed, use a mortar to grind until there is no obvious granularity. After washing with water, centrifuge at 8000rpm for 3 times, and dry in a 100℃ oven for 12h to obtain a livestock and poultry waste resource water treatment catalyst.

[0048] Example 4

[0049] S41. Place fresh pigeon droppings outdoors and air dry for 24 hours. After drying, crush them through an 80-mesh sieve to remove gravel and feathers to obtain dried pigeon droppings; add 200 mL of a 10 mmol / L glucose solution to 10 g of dried pigeon droppings, soak them, then transfer them to a 70 ° C water bath with stirring and evaporate to dryness, and then transfer them to a 100 ° C oven to dry to obtain a catalyst precursor;

[0050] S42. Place 10g of the catalyst precursor in a muffle furnace for pyrolysis and carbonization treatment, pyrolyze at 600℃ for 60min, maintain 600℃ for further pyrolysis for 50min, and heat up at a rate of 5℃ / min. After the pyrolysis is completed, grind it in a mortar until there is no obvious granularity. Wash it with water, centrifuge it at 8000rpm for 3 times, and dry it in an oven at 100℃ for 12h to obtain a livestock and poultry waste resource water treatment catalyst.

[0051] Comparative Example 1

[0052] Taking Example 1 of the Chinese invention patent publication number CN113828361 A as this comparative example, the specific operating steps are as follows:

[0053] Fresh chicken manure was placed outdoors to dry naturally for 24 hours, and after drying, it was crushed through an 80-mesh sieve to remove sand and gravel to obtain substance A;

[0054] 10 g of substance A was placed in 100 mL of deionized water, stirred, and ultrasonicated for 30 min (operating frequency 40 kHz, power 300 W) to obtain solution B. The supernatant was removed and filtered through qualitative filter paper to obtain substance C. Substance C was pyrolyzed at 80°C for 120 min to obtain precursor D.

[0055] The precursor D was placed in a tube furnace for copolymerization annealing treatment at 0.2 m 3 Nitrogen was introduced at a rate of / h, the temperature was 500℃, the time was 120min, and the heating rate was 5℃ / min. After cooling, solid powder E was obtained;

[0056] The solid powder E was washed three times with deionized water, dried at 80° C. for 12 h, and then ground to obtain a waste-to-resource water treatment catalyst (JF-NNSs).

[0057] Comparative Example 2

[0058] S21, the fresh pigeon droppings were placed outdoors to dry naturally for 24h, and after drying, they were crushed through an 80-mesh sieve to remove gravel and feathers to obtain dried pigeon droppings; 100mL of a 5mmol / L vitamin C solution was added to 10g of the dried pigeon droppings, and then the mixture was transferred to a 70°C water bath with stirring and evaporated to dryness, and then transferred to a 100°C oven for drying to obtain a catalyst precursor;

[0059] S22. Place 10g of the catalyst precursor in a muffle furnace for pyrolysis and carbonization treatment, pyrolyze at 600℃ for 60min, maintain 600℃ for another 60min, and heat up at a rate of 5℃ / min. After the pyrolysis is completed, grind it in a mortar until there is no obvious granularity. Wash it with water, centrifuge it at 8000rpm for 3 times, and dry it in an oven at 100℃ for 12h to obtain a livestock and poultry waste resource water treatment catalyst.

[0060] Comparative Example 3

[0061] S31, placing fresh pigeon droppings outdoors to dry naturally for 24h, and after drying, crushing through an 80-mesh sieve to remove gravel and feathers to obtain dried pigeon droppings; adding 100mL of 5mmol / L alanine solution to 10g of dried pigeon droppings, then transferring to a 70°C water bath with stirring and evaporating to dryness, and then transferring to a 100°C oven to dry to obtain a catalyst precursor;

[0062] S32. Place 10g of the catalyst precursor in a muffle furnace for pyrolysis and carbonization treatment, pyrolyze at 600℃ for 60min, maintain 600℃ for another 60min, and heat up at a rate of 5℃ / min. After the pyrolysis is completed, grind it in a mortar until there is no obvious granularity. Wash it with water, centrifuge it at 8000rpm for 3 times, and dry it in an oven at 100℃ for 12h to obtain a livestock and poultry waste resource water treatment catalyst.

[0063] Test Example 1

[0064] The water treatment catalyst prepared in Example 1 was used to treat ciprofloxacin (CIP) simulated wastewater. The specific operation steps are as follows:

[0065] Prepare 1 mg / L ciprofloxacin (CIP) simulated wastewater at room temperature;

[0066] 5 mg and 10 mg of the catalyst were added to 50 mL of the above-mentioned simulated wastewater (final concentrations were 0.1 g / L and 0.2 g / L, respectively). In a constant temperature water bath at 35°C, stirring was started and potassium persulfate trisalt was added to a final concentration of 0.1 mmol / L. The reaction was initiated and samples were taken at different time points to detect pollutant concentrations.

[0067] Depend on Figure 2 From the pollutant removal rate, it can be seen that even when the catalyst concentration is 0.1g / L, the removal rate of ciprofloxacin (CIP) can still reach more than 95% after 5 minutes of treatment; when the catalyst concentration is 0.2g / L, ciprofloxacin (CIP) can be completely removed within 2 minutes.

[0068] Test Example 2

[0069] The water treatment catalyst prepared in Example 1 was used to treat tetracycline (TC) and ciprofloxacin (CIP) simulated wastewater. The specific operation steps are as follows:

[0070] Simulated wastewater containing 1 mg / L of tetracycline (TC) and ciprofloxacin (CIP) was prepared at room temperature.

[0071] 5 mg of the catalyst was added to 50 mL of the above-mentioned simulated wastewater (final concentration was 0.1 g / L). In a constant temperature water bath at 35°C, stirring was started and potassium persulfate trisalt was added to a final concentration of 0.1 mmol / L to start the reaction. Samples were taken at different time points to detect pollutant concentrations.

[0072] Depend on Figure 3 From the pollutant removal rate, it can be seen that the water treatment catalyst prepared in Example 1 of the present invention can completely remove tetracycline (TC) within 30 seconds, and the removal rate of ciprofloxacin (CIP) also reaches an average removal limit of 70%.

[0073] Test Example 3

[0074] The degradation experiment of tetracycline (TC), an organic pollutant in water, was conducted using the water treatment catalyst prepared in Example 1. The specific operation steps are as follows:

[0075] The catalyst and the organic pollutant tetracycline (TC) solution were placed in a fixed-bed column reactor to form a self-purification system (catalyst filling 1 g, TC concentration of 1 ppm, PMS concentration of 0.1 mmol / L).

[0076] The catalyst was operated continuously under natural conditions with a hydraulic retention time of 10 min and a sampling interval of 24 h. The initial concentration of the pollutant (TC) and the concentration after the reaction were tested to determine the stability and repeatability of the catalyst.

[0077] Depend on Figure 5 It can be seen that after 336 hours of continuous operation, the catalyst's treatment effect on TC can still reach 100%, indicating that the catalyst has good stability and can be applied to actual wastewater treatment.

[0078] Test Example 4

[0079] The water treatment catalyst prepared in Control Example 1 was used to treat simulated wastewater containing rhodamine B (RhB), methylene blue (MB), acid orange 7 (AO7), bisphenol A (BPA), and ciprofloxacin (CIP), wherein the concentration of each pollutant was 10 mg / L;

[0080] 0.02g or 0.04g of JF-N NSs were added to 50mL of the simulated wastewater, maintaining a natural pH of 4 and a constant temperature of 35°C. Stirring was initiated while potassium persulfate was added to a final concentration of 2mmol / L to initiate the reaction. Samples were taken at different time points to measure pollutant concentrations.

[0081] Studies have shown that the catalyst obtained in Control Example 1 can degrade most target pollutants by more than 50% within 10 minutes; and by more than 99% after 60 minutes.

[0082] Test Example 5

[0083] The test method of Test Example 2 was used to test the treatment effect of the catalysts obtained in Examples 1-2 and Comparative Examples 1-3 on wastewater with organic pollutants, and the removal rate of each organic pollutant was detected at 30 seconds.

[0084] Studies have shown that only the catalyst prepared in Examples 1-2 can achieve a 100% removal rate for tetracycline in 30 seconds, and a 70% removal rate for ciprofloxacin. However, the catalyst prepared in Comparative Examples 1-3 requires a degradation time of 20-60 minutes to achieve a 100% removal rate for tetracycline.

[0085] The comparative example 2 used vitamin C instead of glucose in the example 1. The reason for the poor effect may be that a large amount of vitamin C was oxidized to CO2 during the catalyst firing process and did not form a graphene-like substrate together with the pigeon droppings.

[0086] The control example 3 used alanine instead of urea in Example 2. The reason for the poor effect may be that a large amount of alanine was mineralized during the catalyst firing process and did not form a graphene-like substrate together with the pigeon droppings.

[0087] In summary, the livestock and poultry waste resource water treatment catalyst prepared in the present invention can be used in combination with persulfate to degrade various pollutants in water and achieve excellent wastewater purification effects in a short period of time.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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. An application of a livestock and poultry waste resource water treatment catalyst, characterized in that: The livestock and poultry waste resource water treatment catalyst is used in combination with persulfate in the treatment of wastewater containing organic pollutants; the organic pollutants include any one or both of tetracycline and ciprofloxacin, and the concentration of the organic pollutants is 0.5-10 mg / L; The method for preparing the livestock and poultry waste resource water treatment catalyst comprises the following steps: S1, adding the precursor solution to the dried pigeon droppings for impregnation, and then evaporating and drying the dried pigeon droppings to obtain a catalyst precursor; S2, pyrolyzing the catalyst precursor, and then grinding, centrifugally washing, and drying in sequence after the pyrolysis is completed to obtain a livestock and poultry waste resource water treatment catalyst; Wherein, the precursor solution is an aqueous solution of either one or both of glucose and urea.

2. The use according to claim 1, characterized in that In step S1, during the drying process, the pigeon droppings are dried to a moisture content below 10%.

3. The use according to claim 1, characterized in that In step S1, during the impregnation, the solid-liquid impregnation ratio of the dried pigeon droppings to the precursor solution is controlled to be 1 g: (1-20) mL, wherein the concentration of the precursor solution is 0.1-10 mmol / L.

4. The use according to claim 1, characterized in that In step S1, during the evaporation, the impregnated system is placed in a water bath, stirred, and evaporated to dryness, wherein the temperature of the water bath is 60-80°C; During the drying, the system after stirring and evaporation is placed in an oven for drying, wherein the temperature of the oven is 60-100°C.

5. The use according to claim 1, characterized in that In step S2, during the pyrolysis, the catalyst precursor is placed in a muffle furnace and pyrolyzed at 500-600°C for 30-60 minutes, and then programmed to 600-800°C for 30-60 minutes, with a heating rate of 5-10°C / min.

6. The use according to claim 1, characterized in that In step S2, the grinding is performed using a mortar and pestle until no obvious particles are left; During the centrifugal washing, water or ethanol is used for washing, and the mixture is centrifuged for 3-5 times. During the centrifugation, the rotation speed of the centrifuge is controlled to be 8000-10000 rpm.

7. The use according to claim 1, characterized in that When the livestock and poultry waste resource water treatment catalyst and persulfate are used in combination in the treatment of wastewater containing organic pollutants, the concentration of the livestock and poultry waste resource water treatment catalyst in the wastewater is controlled to be 0.05-1g / L, and the concentration of persulfate in the wastewater is controlled to be 0.05-0.2mmol / L.

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