Method for removing antibiotics in feces of livestock and poultry

Abstract

The invention discloses a method for removing antibiotics in feces of livestock and poultry, which comprises the following steps: S1, uniformly collecting the feces, and primarily removing part of antibiotics in a physical mode; s2, adding a mixed chemical solvent into the treated excrement, and performing decomposition treatment on antibiotics in the excrement; s3, treating the excrement by utilizing ultraviolet light and photocatalysis, and degrading antibiotics; and S4, spreading the livestock and poultry manure in a closed or semi-closed container, controlling the temperature, adding microorganisms, and carrying out fermentation culture for 4-5 days. According to the method, multiple treatment modes including physical, chemical, photolysis and microbial fermentation are adopted, antibiotics in the livestock and poultry manure are removed by combining multiple technical means, the removal efficiency is improved, the method pays attention to environmental protection in the treatment process, the livestock and poultry manure is treated through the physical, chemical and biological methods, pollution to the environment is reduced, and the method is suitable for popularization and application. And recyclable resources such as organic fertilizers can be generated in the microbiological treatment process.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection, in particular to a method for removing antibiotics from livestock excrement. Background Art

[0003] The existing methods for removing antibiotics from feces are mainly through composting and high-temperature fermentation. The overall removal is time-consuming, not thorough enough, and has poor results. Here we propose a method for removing antibiotics from poultry and livestock feces. Summary of the invention

[0004] The present invention solves the above technical deficiencies and adopts a modified technical solution, a method for removing antibiotics from livestock feces, comprising the following steps:

[0005] S1, collect the feces uniformly and use physical methods to remove some antibiotics for the first time;

[0006] S2, adding a mixed chemical solvent to the treated feces to decompose the antibiotics in the feces;

[0007] S3, using ultraviolet light and photocatalysis to treat feces and degrade antibiotics;

[0008] S4, spread the livestock and poultry manure in a closed or semi-closed container, control the temperature, add microorganisms, and ferment and culture for 4-5 days.

[0009] As a further preferred embodiment of the present invention, in step S1, the physical treatment method includes the following steps: first, filtering the feces, using a micropore filter screen with a pore size selected between 6-45um, passing the poultry and livestock feces into the filtration system, separating solid particles, some antibiotics and other substances through the filter screen, and then performing precipitation treatment, passing the poultry and livestock feces into a sedimentation tank, and then stirring the feces. During the stirring process, a precipitant is added to allow the antibiotics and solid particles to precipitate to the bottom, and the supernatant is removed. Finally, the feces is aerated, and bubbles are injected into the poultry and livestock feces to increase the gas-liquid interface area, promote the transfer of dissolved oxygen and the oxidative decomposition of organic matter, thereby degrading antibiotics.

[0010] As a further preferred embodiment of the present invention, in step S3, in the physical treatment method, the stirring speed is controlled at 85r / min-125r / min and lasts for 10-30min. The precipitant is iron salt or aluminum salt. During the aeration process, tiny bubbles are selected with a diameter between 50-500um.

[0011] As a further preferred embodiment of the present invention, in step S1, the physical treatment method also includes using an activated carbon rod for rapid adsorption, on the outer wall of which aluminum oxide and iron oxide are adhered by electromagnetic sputtering, and the entire activated carbon rod is stirred and contacted in the feces.

[0012] As a further preferred embodiment of the present invention, the mixed chemical solvent includes 2.5-6 parts of H2O2, 2-6 parts of TiO2, 1-4 parts of pH regulator, 2-4 parts of complexing agent, 0.2-0.8 parts of potassium permanganate, and 4-10 parts of water.

[0013] As a further preferred embodiment of the present invention, step S2 specifically includes the following steps:

[0014] After the initial physical removal of some antibiotics from the feces, preliminary processing and preparation are carried out to prepare a mixed chemical solvent, which is poured into the corresponding feces at a ratio of 1:150, and then stirred for 10-20 minutes. The stirring speed is controlled between 20r / min-45r / min, and the temperature is controlled between 45-55°C. Then it is allowed to stand at room temperature for 2 hours to allow the chemical substances to fully decompose the antibiotics. The pH value of the reaction solution and the degradation of the antibiotics are regularly monitored. The pH value is controlled between 6.8-7.2. The pH regulator can be injected for real-time adjustment. The pH regulator is HCL or NaOH.

[0015] As a further preferred embodiment of the present invention, in step S3, a photolysis device is prepared: an ultraviolet light source irradiation device is set to fully illuminate the feces containing titanium dioxide to perform a photolysis reaction for 2-8 hours, and the wavelength of the irradiated light is between 200 nanometers and 400 nanometers.

[0016] As a further preferred embodiment of the present invention, the microorganisms include bacteria of the genus Pseudomonas, Bacillus, Streptomyces, Acinetobacter, and Rhodococcus, and are treated within a temperature range suitable for the growth of microorganisms, with the temperature controlled between 20-40°C and the pH value between 6 and 8.

[0017] Beneficial Effects

[0018] (1) The present invention adopts a variety of treatment methods, including physical, chemical, photolysis and microbial fermentation, and combines a variety of technical means to remove antibiotics in livestock manure and improve the removal efficiency. The method pays attention to environmental protection during the treatment process. The physical, chemical and biological methods are used to treat livestock manure, which helps to reduce pollution to the environment. In addition, reusable resources such as organic fertilizers may be produced during the microbial treatment process.

[0019] (2) The physical treatment step of the present invention adopts methods such as filtration, sedimentation and aeration. Through the use of micropore filter and precipitant, solid particles and antibiotics are effectively separated, thereby improving the effect of initial removal. The mixed chemical solvent formula used includes multiple components, such as H2O2, TiO2, chelating agent, etc. These components may have a synergistic effect and are beneficial to the decomposition and degradation of antibiotics. As a whole, antibiotics in poultry and livestock manure can be efficiently removed, which is environmentally friendly, efficient and innovative. DETAILED DESCRIPTION

[0020] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The present invention provides a technical solution: a method for removing antibiotics from livestock feces, comprising the following steps:

[0022] S1, collect the feces uniformly and use physical methods to remove some antibiotics for the first time;

[0023] S2, adding a mixed chemical solvent to the treated feces to decompose the antibiotics in the feces;

[0024] S3, using ultraviolet light and photocatalysis to treat feces and degrade antibiotics;

[0025] S4, spread the livestock and poultry manure in a closed or semi-closed container, control the temperature, add microorganisms, and ferment and culture for 4-5 days.

[0026] In step S1, the physical treatment method includes the following steps: first, filtering the feces, using a micropore filter with a pore size of 6-45um, passing the poultry and livestock feces into the filtration system, separating solid particles, some antibiotics and other substances through the filter, and then performing precipitation treatment, passing the poultry and livestock feces into a sedimentation tank, and then stirring, and during the stirring process, adding a precipitant to allow the antibiotics and solid particles to precipitate to the bottom, removing the supernatant, and finally aerating the feces, injecting bubbles into the poultry and livestock feces, increasing the gas-liquid interface area, promoting the transfer of dissolved oxygen and the oxidative decomposition of organic matter, thereby degrading antibiotics.

[0027] In step S3, in the physical treatment method, the stirring speed is controlled at 85r / min-125r / min and lasts for 10-30min. The precipitant is iron salt or aluminum salt. During the aeration process, tiny bubbles are selected with a diameter between 50-500um.

[0028] In step S1, the physical treatment method also includes using an activated carbon rod for rapid adsorption, on the outer wall of which aluminum oxide and iron oxide are adhered by electromagnetic sputtering, and the entire activated carbon rod is stirred and contacted in the feces.

[0029] The mixed chemical solvent includes 2.5-6 parts of H2O2, 2-6 parts of TiO2, 1-4 parts of pH regulator, 2-4 parts of complexing agent, 0.2-0.8 parts of potassium permanganate, and 4-10 parts of water. The complexing agent can be EDTA (ethylenediaminetetraacetic acid), DTPA (diethylenetriaminepentaacetic acid), or EDDHA (cyclohexanediaminetetraacetic acid).

[0030] Step S2 specifically includes the following steps: after the feces are subjected to initial physical removal of some antibiotics, preliminary processing preparation is performed to prepare a mixed chemical solvent, which is poured into the corresponding feces at a ratio of 1:150, and then stirred for 10-20 minutes, the stirring speed is controlled between 20r / min-45r / min, the temperature is controlled between 45-55°C, and then allowed to stand at room temperature for 2 hours to allow the chemical substances to fully decompose the antibiotics, and the pH value of the reaction solution and the degradation of the antibiotics are regularly monitored. The pH value is controlled between 6.8-7.2, and a pH regulator can be injected for real-time adjustment, and the pH regulator is HCL or NaOH.

[0031] In step S3, a photolysis device is prepared: an ultraviolet light source irradiation device is set up to fully illuminate the feces containing titanium dioxide for a photolysis reaction for 2-8 hours, and the wavelength of the irradiated light is between 200 nanometers and 400 nanometers.

[0032] The microorganisms include bacteria of the genus Pseudomonas, Bacillus, Streptomyces, Acinetobacter and Rhodococcus. The treatment is carried out within a temperature range suitable for the growth of the microorganisms, with the temperature controlled between 20-40°C and the pH value between 6 and 8.

[0033] Embodiment 1

[0034] The feces are uniformly collected, and some antibiotics are initially removed by physical means. The physical treatment method includes the following steps: first, the feces are filtered, and a micropore filter is used, and the pore size is selected to be 45um. The poultry and livestock feces are passed into the filtration system, and solid particles, some antibiotics and other substances are separated by the filter. Then, precipitation treatment is performed, and the poultry and livestock feces are passed into a sedimentation tank, and then stirred. During the stirring process, a precipitant is added to make the antibiotics and solid particles settle to the bottom, and the supernatant is removed. Finally, the feces are aerated, and bubbles are injected into the poultry and livestock feces to increase the gas-liquid interface area, promote the transfer of dissolved oxygen and the oxidative decomposition of organic matter, thereby degrading antibiotics. In the physical treatment method, the stirring speed is controlled at 125r / min for 30min. The precipitant is iron salt or aluminum salt. During the aeration process, micro bubbles are selected with a diameter of 500um. The physical treatment method also includes using an activated carbon rod for rapid adsorption. Aluminum oxide and iron oxide are adhered to the outer wall of the activated carbon rod by electromagnetic sputtering. The entire activated carbon rod is stirred and contacted in the feces;

[0035] A mixed chemical solvent is added to the treated feces, wherein the mixed chemical solvent includes 6 parts of H2O2, 6 parts of TiO2, 4 parts of a pH regulator, 4 parts of a chelating agent, 0.8 parts of potassium permanganate, and 10 parts of water to decompose the antibiotics in the feces. Specifically, the following steps are included: after the feces are subjected to initial physical removal of some antibiotics, a preliminary treatment preparation is performed to prepare a mixed chemical solvent, which is poured into the corresponding feces at a ratio of 1:150, and then stirred for 20 minutes, the stirring speed is controlled at 45r / min, the temperature is controlled at 55°C, and then left to stand at room temperature for 2 hours so that the chemical substances can fully decompose the antibiotics, the pH value of the reaction solution and the degradation of the antibiotics are regularly monitored, the pH value is controlled at 7.2, and a pH regulator can be injected for real-time adjustment, and the pH regulator is HCL or NaOH;

[0036] Use ultraviolet light and photocatalysis to treat feces and degrade antibiotics. Prepare a photolysis device: set up an ultraviolet light source irradiation device to fully irradiate the feces containing titanium dioxide for photolysis reaction for 8 hours. The wavelength of the irradiated light is 400 nanometers.

[0037] The livestock and poultry excrement is spread in a closed or semi-closed container, the temperature is controlled, and microorganisms are added, wherein the microorganisms include bacteria of the genus Pseudomonas and bacteria of the genus Bacillus. The temperature is controlled at 40° C., the pH value is 8, and the fermentation culture is carried out for 5 days.

[0038] Embodiment 2

[0039] The feces are uniformly collected, and some antibiotics are initially removed from them by physical means. The physical treatment method includes the following steps: first, the feces are filtered, and a micropore filter screen is used, and the pore size is selected to be 6um. The poultry and livestock feces are passed into the filtration system, and solid particles, some antibiotics and other substances are separated by the filter screen, and then precipitation treatment is performed. The poultry and livestock feces are passed into a sedimentation tank, and then stirred. During the stirring process, a precipitant is added to make the antibiotics and solid particles precipitate to the bottom, and the supernatant is removed. Finally, the feces are aerated, and bubbles are injected into the poultry and livestock feces to increase the gas-liquid interface area, promote the transfer of dissolved oxygen and the oxidative decomposition of organic matter, thereby degrading antibiotics. In the physical treatment method, the stirring speed is controlled at 85r / min and lasts for 10min. The precipitant is an iron salt or an aluminum salt. During the aeration process, micro bubbles are selected with a diameter of 50um. The physical treatment method also includes using an activated carbon rod for rapid adsorption. Aluminum oxide and iron oxide are adhered to the outer wall of the activated carbon rod by electromagnetic sputtering, and the entire activated carbon rod is stirred and contacted in the feces;

[0040] A mixed chemical solvent is added to the treated feces, wherein the mixed chemical solvent includes 2.5 parts of H2O2, 2 parts of TiO2, 1 part of a pH regulator, 2 parts of a chelating agent, 0.2 parts of potassium permanganate, and 4 parts of water, to decompose the antibiotics in the feces, specifically comprising the following steps: after the feces are subjected to initial physical removal of some antibiotics, a preliminary treatment preparation is performed to prepare a mixed chemical solvent, which is poured into the corresponding feces at a ratio of 1:150, and then stirred for 10 minutes, the stirring speed is controlled at 20 r / min, the temperature is controlled at 45-55° C., and then allowed to stand at room temperature for 2 hours so that the chemical substances can fully decompose the antibiotics, the pH value of the reaction solution and the degradation of the antibiotics are regularly monitored, the pH value is controlled at 6.8, and a pH regulator can be injected for real-time adjustment, and the pH regulator is HCL or NaOH;

[0041] Use ultraviolet light and photocatalysis to treat feces and degrade antibiotics. Prepare a photolysis device: set up an ultraviolet light source irradiation device to fully irradiate the feces containing titanium dioxide for photolysis reaction for 2 hours. The wavelength of the irradiated light is 200 nanometers.

[0042] The livestock and poultry manure is spread in a closed or semi-closed container, the temperature is controlled, and microorganisms are added, the microorganisms include Streptomyces bacteria, Acinetobacter bacteria, and Rhodococcus bacteria, and the treatment is carried out within a temperature range suitable for the growth of microorganisms, the temperature is controlled at 20°C, the pH value is 6, and the fermentation culture is carried out for 4 days.

[0043] The specific form is as follows:

[0044] Dealing with feces Sulfonamide removal rate Fluoroquinolone removal rate Macrolide removal rate Example 1 120kg 83.5& 29.3％ 92％ Example 2 200kg 82.1％ 27.5％ 91.5％ .

[0045] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for removing antibiotics from livestock feces, characterized in that: The method comprises the following steps, S1, collect the feces uniformly and use physical methods to remove some antibiotics for the first time; S2, adding a mixed chemical solvent to the treated feces to decompose the antibiotics in the feces; S3, using ultraviolet light and photocatalysis to treat feces and degrade antibiotics; S4, spread the livestock and poultry manure in a closed or semi-closed container, control the temperature, add microorganisms, and ferment and culture for 4-5 days.

2. A method for removing antibiotics from livestock feces according to claim 1, characterized in that: In step S1, the physical treatment method includes the following steps: first, filtering the feces, using a micropore filter with a pore size of 6-45um, passing the poultry and livestock feces into the filtration system, separating solid particles, some antibiotics and other substances through the filter, and then performing precipitation treatment, passing the poultry and livestock feces into a sedimentation tank, and then stirring, and during the stirring process, adding a precipitant to allow the antibiotics and solid particles to precipitate to the bottom, removing the supernatant, and finally aerating the feces, injecting bubbles into the poultry and livestock feces, increasing the gas-liquid interface area, promoting the transfer of dissolved oxygen and the oxidative decomposition of organic matter, thereby degrading antibiotics.

3. The method for removing antibiotics from livestock feces according to claim 1, characterized in that: In the physical treatment method, the stirring speed is controlled at 85r / min-125r / min and lasts for 10-30min. The precipitant is iron salt or aluminum salt. During the aeration process, tiny bubbles are selected with a diameter between 50-500um.

4. The method for removing antibiotics from livestock feces according to claim 1, characterized in that: In step S1, the physical treatment method also includes using an activated carbon rod for rapid adsorption, on the outer wall of which aluminum oxide and iron oxide are adhered by electromagnetic sputtering, and the entire activated carbon rod is stirred and contacted in the feces.

5. The method for removing antibiotics from livestock feces according to claim 1, characterized in that: The mixed chemical solvent includes 2.5-6 parts of H2O2, 2-6 parts of TiO2, 1-4 parts of pH regulator, 2-4 parts of complexing agent, 0.2-0.8 parts of potassium permanganate, and 4-10 parts of water.

6. The preparation method of a method for removing antibiotics from livestock feces according to claim 1, characterized in that: Step S2 specifically includes the following steps: After the initial physical removal of some antibiotics from the feces, preliminary processing and preparation are carried out to prepare a mixed chemical solvent, which is poured into the corresponding feces at a ratio of 1:150, and then stirred for 10-20 minutes. The stirring speed is controlled between 20r / min-45r / min, and the temperature is controlled between 45-55°C. Then it is allowed to stand at room temperature for 2 hours to allow the chemical substances to fully decompose the antibiotics. The pH value of the reaction solution and the degradation of the antibiotics are regularly monitored. The pH value is controlled between 6.8-7.

2. The pH regulator can be injected for real-time adjustment. The pH regulator is HCL or NaOH.

7. The method for removing antibiotics from livestock feces according to claim 4, characterized in that: In step S3, a photolysis device is prepared: an ultraviolet light source irradiation device is set up to fully illuminate the feces containing titanium dioxide for a photolysis reaction for 2-8 hours, and the wavelength of the irradiated light is between 200 nanometers and 400 nanometers.

8. The method for removing antibiotics from livestock feces according to claim 1, characterized in that: The microorganisms include bacteria of the genus Pseudomonas, Bacillus, Streptomyces, Acinetobacter and Rhodococcus. The treatment is carried out within a temperature range suitable for the growth of the microorganisms, with the temperature controlled between 20-40°C and the pH value between 6 and 8.