Method for preparing organic fertilizer from traditional Chinese medicine residues and ardealite

Abstract

The invention provides a method for preparing an organic fertilizer from traditional Chinese medicine residues and ardealite, which comprises the following steps: firstly, activating the traditional Chinese medicine residues by KOH to prepare a three-dimensional ordered porous carbon material, and then, carrying out aerobic composting fermentation on the prepared three-dimensional ordered porous carbon material and the ardealite under the action of an EM (Effective Microorganisms) stock solution to prepare the organic fertilizer. In the composting fermentation process, the three-dimensional ordered porous carbon material effectively adsorbs metal ions such as fluorine, aluminum and magnesium and insoluble impurities such as phosphate and sulfate in the ardealite, and meanwhile, other organic substances in the ardealite are decomposed into an absorbable state under the action of microorganisms in the EC bacterium stock solution to be absorbed and utilized by plant growth. The characteristic that organic substances in the traditional Chinese medicine residues are rich is fully utilized, meanwhile, the defect of utilization of phosphogypsum is effectively overcome through new material preparation and mixed fermentation, waste is turned into wealth to prepare the organic fertilizer, and wide application and popularization prospects are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of waste resource utilization, and specifically relates to a method for preparing organic fertilizer by utilizing traditional Chinese medicine residues and phosphogypsum. Background Art

[0002] In my country, the industrialization process of Chinese herbal medicine and deep processing consumes about 75 million tons of medicinal materials each year, and a large amount of Chinese medicine residues are generated in the process, with an annual total of more than 50 million tons. At present, these Chinese medicine residues have not been reasonably utilized, and most of them are directly discarded or incinerated, which has seriously affected the environmental quality and my country's sustainable development process. Therefore, the proper treatment of Chinese medicine residues has become an important issue that cannot be ignored in the development of contemporary society. Since Chinese medicine residues are all biomass materials, their main components are cellulose, hemicellulose and lignin, and carbon is the main component element. Therefore, the use of thermal decomposition technology to prepare three-dimensional ordered porous carbon materials provides an efficient, simple and reliable way for the industrial application of Chinese medicine residues.

[0003] Phosphogypsum is a byproduct of wet acid production using phosphate rock. Under existing process conditions, 4 to 5 tons of phosphogypsum will be produced for every ton of phosphoric acid produced. Phosphogypsum is grayish white or grayish black in color, and its main component is CaSO4·2H2O. Because it contains a variety of harmful impurities such as soluble phosphorus, eutectic phosphorus, soluble fluorine and organic matter, phosphogypsum cannot be used directly. At present, the global stockpile of phosphogypsum has reached 6 billion tons, and it is still increasing rapidly at a rate of 150 million tons per year. The huge amount of phosphogypsum stockpiles not only occupies a large amount of land, but also pollutes groundwater, soil, vegetation and the atmospheric environment. The effective utilization of temporary stockpiles has become an urgent and difficult problem. Summary of the invention

[0004] In view of the problems in the background technology, the present invention designs a method for preparing organic fertilizer using traditional Chinese medicine residues and phosphogypsum. This method utilizes traditional Chinese medicine residues and phosphogypsum for joint composting, which can not only effectively reduce the hazards of the two, but also reflect their advantages and turn the two into treasures.

[0005] In order to realize the above-mentioned technical features, the object of the present invention is achieved in this way: a method for preparing organic fertilizer using Chinese medicine residues and phosphogypsum, comprising the following steps: Step 1: Drying of Chinese medicine residue: The initial Chinese medicine residue is dried at 55℃~60℃ for 24h~48h to obtain Chinese medicine residue ZY1 with a moisture content reduced to 30%~40%; the Chinese medicine residue ZY1 is coarsely crushed to a particle size of ≤50mm to obtain Chinese medicine residue ZY2; the Chinese medicine residue ZY2 is sieved with a multiple frequency sieve, and the Chinese medicine residue ZY21 with a particle size of <10mm under the sieve is reserved for use, and the Chinese medicine residue ZY22 with a particle size of 10mm~50mm in the sieve enters the next drying process, and the Chinese medicine residue ZY23 with a particle size of >50mm on the sieve returns to the previous crushing process for re-crushing and sieving; the Chinese medicine residue ZY22 with a particle size of 10mm~50mm in the sieve is dried at 75℃~80℃ for 24h~48h to obtain a Chinese medicine residue ZY23 with a moisture content reduced to 1 5%~20% of Chinese medicine residue ZY3; screen the Chinese medicine residue ZY3 with a multiple frequency sieve, set aside the Chinese medicine residue ZY31 with a particle size of less than 8mm, and enter the next drying process for the Chinese medicine residue ZY32 with a particle size of 8mm~15mm in the sieve, and return the Chinese medicine residue ZY33 with a particle size of more than 15mm in the sieve to the previous crushing process for re-crushing and screening; dry the Chinese medicine residue ZY32 with a particle size of 8mm~15mm in the sieve at 90℃ to obtain Chinese medicine residue ZY4 with a moisture content of 5%; add an equal volume of distilled water to the Chinese medicine residue ZY4, mix and stir to form a uniform aqueous solution, and then boil at 100℃ for 2h, centrifuge the boiled Chinese medicine residue ZY4 for 1h and dry to absolute dryness to obtain Chinese medicine residue ZY5; Step 2: Activation treatment of Chinese medicine residues: The Chinese medicine residue ZY5 and urea were mixed in a mass ratio of 1:1, and after being evenly mixed, they were placed in a polytetrafluoroethylene high-temperature reactor and reacted at 180°C for 24 hours. After the reaction was completed, excess water was removed by centrifugation, and then washed with distilled water three times and ethanol three times in sequence to obtain the Chinese medicine residue ZY6 activated by urea. The Chinese medicine residue ZY6 was placed in a vacuum drying oven and dried to absolute dryness; Step 3: Aging treatment of Chinese medicine residue: The Chinese medicine residue ZY6 and KOH powder or tablets are mixed in a mass ratio of 1:2, and after being evenly mixed, they are placed in a beaker of distilled water containing 3 times the mass of the Chinese medicine residue ZY6. After aging for 24 hours, they are dried to absolute dryness to obtain the aged Chinese medicine residue ZY6. The aged Chinese medicine residue ZY6 is ground to a particle size of <5mm and passed through a 5mm sieve. The Chinese medicine residue ZY61 with a particle size of >5mm under the sieve is reserved for use, and the Chinese medicine residue ZY62 with a particle size of ≤5mm on the sieve is entered into the next process, which is placed in a tubular furnace and calcined at 800°C for 2 hours under nitrogen protection; Step 4: Prepare three-dimensional ordered porous carbon material: The Chinese medicine residue ZY62 was washed with 1 mol / L dilute hydrochloric acid solution to a pH value of 6-7, and then dried in an oven at 90°C until there was no flowing water, thereby obtaining a three-dimensional ordered porous carbon material ZY7. Step 5, aerobic composting: The EM bacteria stock solution and phosphogypsum were mixed evenly in a mass ratio of 3:1 to obtain ZY8, and the Chinese medicine residue ZY21, Chinese medicine residue ZY31, Chinese medicine residue ZY61 and three-dimensional ordered porous carbon material ZY7 were mixed evenly to obtain ZY9, and then ZY8 and ZY9 were mixed evenly in equal mass and added to the fermentation tank for fermentation. During the fermentation, oxygen was continuously supplied to the fermentation tank through an oxygen generator to ensure that the oxygen content in the tank was 19-21%, and the automatic stirring paddle in the tank continuously stirred the fermentation mixture to ensure that the fermentation was evenly mixed. After the fermentation process lasted for 14-20 days, the fermentation product ZY10 was obtained, and the fermentation product ZY10 was dried or naturally dried to a moisture content of <14% to obtain organic fertilizer.

[0006] Preferably, in step 1, the Chinese medicine residue needs to be dried, crushed and sieved multiple times, and finally the moisture content of the Chinese medicine residue ZY4 is below 5%.

[0007] Preferably, in step one, the Chinese medicine residue is crushed and then sieved through a multiple frequency sieve, the fine particles under the sieve are directly reserved, the coarse particles on the sieve are crushed and sieved again, and the sieved part enters the next process.

[0008] Preferably, in step 2, the activation treatment process of the traditional Chinese medicine residue needs to control the mass ratio of the traditional Chinese medicine residue powder to urea to be 1:1.

[0009] Preferably, in step three, the Chinese medicine residue aging treatment process needs to control the Chinese medicine residue powder and KOH to be evenly mixed in a mass ratio of 1:2, and placed in a beaker filled with an equal amount of distilled water.

[0010] Preferably, in step 4, the calcined Chinese medicine residue powder is washed with a 1 mol / L dilute hydrochloric acid solution until the pH value reaches 6-7.

[0011] Preferably, in step 4, the fermentation tank is a floating roof tank, which can be automatically exhausted when the air pressure inside the tank is higher than that outside the tank, and a natural ventilation port is provided at the top of the fermentation tank.

[0012] Preferably, in step five, the microbial agent is an EM bacterial stock solution, which is composed of 80 species of microorganisms from 10 genera of 5 species, including photosynthetic bacteria, lactic acid bacteria, yeasts, actinomycetes and filamentous bacteria, and the effective live bacteria count is ≥100 billion / g.

[0013] Preferably, in step five, the EM bacteria stock solution and phosphogypsum are mixed uniformly in a mass ratio of 3:1 to obtain ZY8, and the traditional Chinese medicine residue ZY21, traditional Chinese medicine residue ZY31, traditional Chinese medicine residue ZY61 and three-dimensional ordered porous carbon material ZY7 are mixed uniformly to obtain ZY9, and then ZY8 and ZY9 are mixed uniformly in equal masses and added to a fermenter for fermentation, during which oxygen is continuously supplied to the fermenter by an oxygen generator to ensure that the oxygen content in the tank is between 19 and 21%.

[0014] Preferably, the main components of the EM stock solution are filamentous fungi, Bacillus, Trichoderma, photosynthetic bacteria, actinomycetes, beneficial microorganisms and metabolic enzymes.

[0015] Beneficial effects of the present invention: 1. The present invention can make the Chinese medicine residue into a highly adsorbable three-dimensional ordered porous carbon material by activating and aging the residue and washing it with dilute hydrochloric acid, and has a significant effect on the adsorption of metal ions.

[0016] 2. The present invention uses a multi-frequency screen to screen the dried and crushed Chinese medicine residues. The fine particles under the screen are directly used for standby, the coarse particles on the screen are crushed and screened again, and the screened part enters the next process. The fine particles of Chinese medicine residue under the screen directly participate in the fermentation, supplement the nutrient source for microorganisms in the fermentation process, increase the reproduction rate of bacteria in the fermentation process, and improve the fermentation effect; graded utilization effectively improves the utilization rate of Chinese medicine residues and improves the success rate of preparing three-dimensional ordered porous carbon materials.

[0017] 3. The present invention uses urea and KOH to prepare a three-dimensional ordered porous carbon material containing potassium and fertilizer, which can provide a small amount of potassium for microbial nutrition during the subsequent fermentation process, and will not introduce other harmful elements that threaten subsequent plant growth.

[0018] 4. The present invention combines Chinese medicine residue with phosphogypsum for composting. Phosphogypsum has the function of reducing pH value and increasing the mineral content during the fermentation process. The three-dimensional ordered porous carbon material prepared by using Chinese medicine residue has extremely strong adsorption performance, which effectively eliminates the disadvantages of metal ion pollution in phosphogypsum. At the same time, the organic acid produced by the large amount of organic matter provided by the three-dimensional ordered porous carbon material during fermentation has the function of converting the insoluble phosphorus in phosphogypsum into effective phosphorus, and the humus produced has the function of reducing the effectiveness of heavy metals in phosphogypsum, which just eliminates the disadvantages of phosphogypsum. In summary, the combined composting of Chinese medicine residue and phosphogypsum can complement each other and turn waste into treasure for both. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a flow chart of the overall method of the present invention. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0022] Embodiment 1: A method for preparing organic fertilizer using Chinese medicine residues and phosphogypsum, the specific steps of which include: Drying treatment of Chinese herbal medicine residue: the initial Chinese herbal medicine residue is dried at 55℃ for 24h to reduce the moisture content to 30% to obtain Chinese herbal medicine residue ZY1; the Chinese herbal medicine residue ZY1 is coarsely crushed to a particle size of ≤50mm to obtain Chinese herbal medicine residue ZY2; the Chinese herbal medicine residue ZY2 is sieved with a multiple frequency sieve, and the Chinese herbal medicine residue ZY21 with a particle size of <10mm under the sieve is reserved for use, and the Chinese herbal medicine residue ZY22 with a particle size of 10mm~50mm in the sieve enters the next drying process, and the Chinese herbal medicine residue ZY23 with a particle size of >50mm on the sieve is returned to the previous crushing process for re-crushing and screening; the Chinese herbal medicine residue ZY22 with a particle size of 10mm~50mm in the sieve is dried at 75℃~80℃ for 24h~48h to obtain a herbal medicine residue with a moisture content reduced to 1 5%~20% of Chinese medicine residue ZY3; screen the Chinese medicine residue ZY3 with a multiple frequency sieve, set aside the Chinese medicine residue ZY31 with a particle size of less than 8mm, and enter the next drying process with a particle size of 8mm~15mm in the sieve. The Chinese medicine residue ZY33 with a particle size of more than 15mm on the sieve returns to the previous crushing process for re-crushing and screening; dry the Chinese medicine residue ZY32 with a particle size of 8mm~15mm in the sieve at 90℃ to obtain Chinese medicine residue ZY4 with a moisture content of 5%; add an equal volume of distilled water to the Chinese medicine residue ZY4 and mix and stir until a uniform aqueous solution is formed, and then boil at 100℃ for 2h, centrifuge the boiled Chinese medicine residue ZY4 for 1h and dry it to absolutely dry Chinese medicine residue ZY5; Activation treatment of Chinese medicine residue: Chinese medicine residue ZY5 is mixed with urea in a mass ratio of 1:1, and after being evenly mixed, it is placed in a polytetrafluoroethylene high-temperature reactor and reacted at 180°C for 24 hours. After the reaction is completed, excess water is removed by centrifugation, and then washed with distilled water three times and ethanol three times in sequence to obtain Chinese medicine residue ZY6 activated by urea. The Chinese medicine residue ZY6 is placed in a vacuum drying oven and dried to absolute dryness; Aging treatment of Chinese herbal medicine residue: Mix Chinese herbal medicine residue ZY6 and KOH powder or tablets in a mass ratio of 1:2, mix well and place in a beaker of distilled water containing 3 times the mass of Chinese herbal medicine residue ZY6, age for 24 hours and then dry to absolute dryness to obtain aged Chinese herbal medicine residue ZY6, grind the aged Chinese herbal medicine residue ZY6 to a particle size of <5mm and pass through a 5mm sieve, set aside the Chinese herbal medicine residue ZY61 with a particle size of >5mm under the sieve, and enter the next pickling process of Chinese herbal medicine residue ZY62 with a particle size of ≤5mm on the sieve, and then place in a tubular furnace and calcine at 800℃ for 2 hours under nitrogen protection; Preparation of three-dimensional ordered porous carbon material: washing the traditional Chinese medicine residue ZY62 with 1 mol / L dilute hydrochloric acid solution to a pH value of 6, and then drying it in an oven at 90°C until there is no flowing water, to obtain a three-dimensional ordered porous carbon material ZY7; Aerobic composting: EM bacteria stock solution and phosphogypsum are mixed evenly in a mass ratio of 3:1 to obtain ZY8, and Chinese medicine residue ZY21, Chinese medicine residue ZY31, Chinese medicine residue ZY61 and three-dimensional ordered porous carbon material ZY7 are mixed evenly to obtain ZY9, and then ZY8 and ZY9 are mixed evenly in equal mass and added to the fermentation tank for fermentation. During this period, oxygen is continuously supplied to the fermentation tank through an oxygen generator to ensure that the oxygen content in the tank is 19%, and the automatic stirring paddle in the tank continuously stirs the fermentation mixture to ensure that the fermentation is evenly mixed. After the fermentation process lasts for 20 days, the fermentation product ZY10 can be obtained, and the fermentation product ZY10 is dried or naturally dried to a moisture content of <14% to obtain organic fertilizer.

[0023] Embodiment 2: A method for preparing organic fertilizer using Chinese medicine residues and phosphogypsum, the specific steps of which include: Drying treatment of Chinese medicine residue: the initial Chinese medicine residue is dried at 60℃ for 48h to obtain Chinese medicine residue ZY1 with a moisture content reduced to 40%; the Chinese medicine residue ZY1 is coarsely crushed to a particle size of ≤50mm to obtain Chinese medicine residue ZY2; the Chinese medicine residue ZY2 is sieved with a multiple frequency sieve, and the Chinese medicine residue ZY21 with a particle size of <10mm is set aside for use, and the Chinese medicine residue ZY22 with a particle size of 10mm~50mm in the sieve enters the next drying process, and the Chinese medicine residue ZY23 with a particle size of >50mm in the sieve returns to the previous crushing process for re-crushing and screening; the Chinese medicine residue ZY22 with a particle size of 10mm~50mm in the sieve is dried at 75℃~80℃ for 24h~48h to obtain a Chinese medicine residue ZY22 with a moisture content reduced to 15%. ~20% of Chinese medicine residue ZY3; screen the Chinese medicine residue ZY3 with a multiple frequency sieve, set aside the Chinese medicine residue ZY31 with a particle size of less than 8mm, and enter the next drying process for the Chinese medicine residue ZY32 with a particle size of 8mm~15mm in the sieve, and return the Chinese medicine residue ZY33 with a particle size of more than 15mm in the sieve to the previous crushing process for re-crushing and screening; dry the Chinese medicine residue ZY32 with a particle size of 8mm~15mm in the sieve at 90℃ to obtain Chinese medicine residue ZY4 with a moisture content of 5%; add an equal volume of distilled water to the Chinese medicine residue ZY4 and mix and stir to form a uniform aqueous solution, and then boil it at 100℃ for 2h, centrifuge the boiled Chinese medicine residue ZY4 for 1h and dry it to absolute dryness to obtain Chinese medicine residue ZY5; Activation treatment of Chinese medicine residue: Chinese medicine residue ZY5 is mixed with urea in a mass ratio of 1:1, and after being evenly mixed, it is placed in a polytetrafluoroethylene high-temperature reactor and reacted at 180°C for 24 hours. After the reaction is completed, excess water is removed by centrifugation, and then washed with distilled water three times and ethanol three times in sequence to obtain Chinese medicine residue ZY6 activated by urea. The Chinese medicine residue ZY6 is placed in a vacuum drying oven and dried to absolute dryness; Aging treatment of Chinese herbal medicine residue: Mix Chinese herbal medicine residue ZY6 and KOH powder or tablets in a mass ratio of 1:2, mix well and place in a beaker of distilled water containing 3 times the mass of Chinese herbal medicine residue ZY6, age for 24 hours and then dry to absolute dryness to obtain aged Chinese herbal medicine residue ZY6, grind the aged Chinese herbal medicine residue ZY6 to a particle size of <5mm and pass through a 5mm sieve, set aside the Chinese herbal medicine residue ZY61 with a particle size of >5mm under the sieve, and enter the next pickling process of Chinese herbal medicine residue ZY62 with a particle size of ≤5mm on the sieve, and then place in a tubular furnace and calcine at 800℃ for 2 hours under nitrogen protection; The three-dimensional ordered porous carbon material was prepared: the Chinese medicine residue ZY62 was washed with a 1 mol / L dilute hydrochloric acid solution to a pH value of 7, and then dried in an oven at 90°C until there was no flowing water, thereby obtaining the three-dimensional ordered porous carbon material ZY7; Aerobic composting: Mix EM bacteria stock solution and phosphogypsum in a mass ratio of 3:1 to obtain ZY8, mix Chinese medicine residue ZY21, Chinese medicine residue ZY31, Chinese medicine residue ZY61 and three-dimensional ordered porous carbon material ZY7 to obtain ZY9, and then mix ZY8 and ZY9 in equal mass and add them to the fermentation tank for fermentation. During this period, oxygen is continuously supplied to the fermentation tank through an oxygen generator to ensure that the oxygen content in the tank is 21%. The automatic stirring paddle in the tank continuously stirs the fermentation mixture to ensure that the fermentation is evenly mixed. After the fermentation process lasts for 14 days, the fermentation product ZY10 can be obtained. The fermentation product ZY10 is dried or naturally dried to a moisture content of <14% to obtain organic fertilizer.

Claims

1. A method for preparing organic fertilizer using Chinese medicine residues and phosphogypsum, characterized in that: The following steps are involved: Step 1: Drying of Chinese medicine residue: The initial Chinese medicine residue is dried at 55℃~60℃ for 24h~48h to obtain Chinese medicine residue ZY1 with a moisture content reduced to 30%~40%; the Chinese medicine residue ZY1 is coarsely crushed to a particle size of ≤50mm to obtain Chinese medicine residue ZY2; the Chinese medicine residue ZY2 is sieved with a multiple frequency sieve, and the Chinese medicine residue ZY21 with a particle size of <10mm under the sieve is reserved for use, and the Chinese medicine residue ZY22 with a particle size of 10mm~50mm in the sieve enters the next drying process, and the Chinese medicine residue ZY23 with a particle size of >50mm on the sieve returns to the previous crushing process for re-crushing and sieving; the Chinese medicine residue ZY22 with a particle size of 10mm~50mm in the sieve is dried at 75℃~80℃ for 24h~48h to obtain a Chinese medicine residue ZY23 with a moisture content reduced to 1 5%~20% of Chinese medicine residue ZY3; screen the Chinese medicine residue ZY3 with a multiple frequency sieve, set aside the Chinese medicine residue ZY31 with a particle size of less than 8mm, and enter the next drying process for the Chinese medicine residue ZY32 with a particle size of 8mm~15mm in the sieve, and return the Chinese medicine residue ZY33 with a particle size of more than 15mm in the sieve to the previous crushing process for re-crushing and screening; dry the Chinese medicine residue ZY32 with a particle size of 8mm~15mm in the sieve at 90℃ to obtain Chinese medicine residue ZY4 with a moisture content of 5%; add an equal volume of distilled water to the Chinese medicine residue ZY4, mix and stir to form a uniform aqueous solution, and then boil at 100℃ for 2h, centrifuge the boiled Chinese medicine residue ZY4 for 1h and dry to absolute dryness to obtain Chinese medicine residue ZY5; Step 2: Activation treatment of Chinese medicine residues: The Chinese medicine residue ZY5 and urea were mixed in a mass ratio of 1:1, and after being evenly mixed, they were placed in a polytetrafluoroethylene high-temperature reactor and reacted at 180°C for 24 hours. After the reaction was completed, excess water was removed by centrifugation, and then washed with distilled water three times and ethanol three times in sequence to obtain the Chinese medicine residue ZY6 activated by urea. The Chinese medicine residue ZY6 was placed in a vacuum drying oven and dried to absolute dryness; Step 3: Aging treatment of Chinese medicine residue: The Chinese medicine residue ZY6 and KOH powder or tablets are mixed in a mass ratio of 1:2, and after being evenly mixed, they are placed in a beaker of distilled water containing 3 times the mass of the Chinese medicine residue ZY6. After aging for 24 hours, they are dried to absolute dryness to obtain the aged Chinese medicine residue ZY6. The aged Chinese medicine residue ZY6 is ground to a particle size of <5mm and passed through a 5mm sieve. The Chinese medicine residue ZY61 with a particle size of >5mm under the sieve is reserved for use, and the Chinese medicine residue ZY62 with a particle size of ≤5mm on the sieve is entered into the next process, which is placed in a tubular furnace and calcined at 800°C for 2 hours under nitrogen protection; Step 4: Prepare three-dimensional ordered porous carbon material: The Chinese medicine residue ZY62 was washed with 1 mol / L dilute hydrochloric acid solution to a pH value of 6-7, and then dried in an oven at 90°C until there was no flowing water, thereby obtaining a three-dimensional ordered porous carbon material ZY7. Step 5, aerobic composting: The EM bacteria stock solution and phosphogypsum were mixed evenly in a mass ratio of 3:1 to obtain ZY8, and the Chinese medicine residue ZY21, Chinese medicine residue ZY31, Chinese medicine residue ZY61 and three-dimensional ordered porous carbon material ZY7 were mixed evenly to obtain ZY9, and then ZY8 and ZY9 were mixed evenly in equal mass and added to the fermentation tank for fermentation. During the fermentation, oxygen was continuously supplied to the fermentation tank through an oxygen generator to ensure that the oxygen content in the tank was 19-21%, and the automatic stirring paddle in the tank continuously stirred the fermentation mixture to ensure that the fermentation was evenly mixed. After the fermentation process lasted for 14-20 days, the fermentation product ZY10 was obtained, and the fermentation product ZY10 was dried or naturally dried to a moisture content of <14% to obtain organic fertilizer.

2. A method for preparing organic fertilizer using Chinese medicinal residues and phosphogypsum according to claim 1, characterized in that: In step one, the Chinese medicine residue needs to be dried, crushed and screened multiple times, and finally the moisture content of the Chinese medicine residue ZY4 is reduced to less than 5%.

3. A method for preparing organic fertilizer using Chinese medicinal residues and phosphogypsum according to claim 1, characterized in that: In step one, the Chinese medicine residue is crushed and then sieved through a multiple frequency sieve, the fine particles under the sieve are directly reserved, the coarse particles on the sieve are crushed and sieved again, and the sieved part enters the next process.

4. A method for preparing organic fertilizer using Chinese medicinal residues and phosphogypsum according to claim 1, characterized in that: In step 2, the activation treatment process of the Chinese medicine residue needs to control the mass ratio of the Chinese medicine residue powder to urea to be 1:

1.

5. A method for preparing organic fertilizer using Chinese medicinal residues and phosphogypsum according to claim 1, characterized in that: Step 3: The aging treatment process of the Chinese medicine residue requires that the Chinese medicine residue powder and KOH be evenly mixed in a mass ratio of 1:2 and placed in a beaker containing an equal amount of distilled water.

6. A method for preparing organic fertilizer using Chinese medicinal residues and phosphogypsum according to claim 1, characterized in that: In step 4, the roasted Chinese medicine residue powder is washed with a 1 mol / L dilute hydrochloric acid solution until the pH value reaches 6-7.

7. A method for preparing organic fertilizer using Chinese medicinal residues and phosphogypsum according to claim 1, characterized in that: In step 4, the fermentation tank is a floating roof tank, and the gas can be automatically exhausted when the gas pressure inside the tank is higher than that outside the tank. A natural ventilation port is also provided at the top of the fermentation tank.

8. A method for preparing organic fertilizer using Chinese medicinal residues and phosphogypsum according to claim 1, characterized in that: In step five, the microbial agent is an EM bacterial stock solution, which is composed of 80 species of microorganisms from 10 genera of 5 species, including photosynthetic bacteria, lactic acid bacteria, yeast, actinomycetes, and filamentous bacteria, and the effective live bacteria count is ≥100 billion / g.

9. A method for preparing organic fertilizer using Chinese medicinal residues and phosphogypsum according to claim 1, characterized in that: In step five, the EM bacteria stock solution and phosphogypsum are mixed uniformly in a mass ratio of 3:1 to obtain ZY8, and the traditional Chinese medicine residue ZY21, traditional Chinese medicine residue ZY31, traditional Chinese medicine residue ZY61 and three-dimensional ordered porous carbon material ZY7 are mixed uniformly to obtain ZY9, and then ZY8 and ZY9 are mixed uniformly in equal masses and added to a fermentation tank for fermentation, during which oxygen is continuously supplied to the fermentation tank by an oxygen generator to ensure that the oxygen content in the tank is between 19 and 21%.

10. The method for preparing organic fertilizer using kitchen waste and phosphogypsum according to claim 1, characterized in that: The main components of EM stock solution are filamentous fungi, Bacillus, Trichoderma, photosynthetic bacteria, actinomycetes, beneficial microorganisms and metabolic enzymes.

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