CN111646828A - Organic fertilizer production system and production method - Google Patents
Organic fertilizer production system and production method Download PDFInfo
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- CN111646828A CN111646828A CN202010449921.1A CN202010449921A CN111646828A CN 111646828 A CN111646828 A CN 111646828A CN 202010449921 A CN202010449921 A CN 202010449921A CN 111646828 A CN111646828 A CN 111646828A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D9/00—Other inorganic fertilisers
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/964—Constructional parts, e.g. floors, covers or doors
- C05F17/971—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material
- C05F17/979—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material the other material being gaseous
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biotechnology (AREA)
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- Microbiology (AREA)
- Molecular Biology (AREA)
- Pest Control & Pesticides (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention belongs to the technical field of organic fertilizer production, and particularly discloses an organic fertilizer production system and a production method, wherein a fermentation tank is provided with a feed inlet at the top and a discharge outlet at the bottom, a fan is fixedly arranged at one side of the fermentation tank, the air outlet of the fan is communicated with a main stream air pipe, the main stream air pipe is uniformly communicated with a shunting air pipe, and one end of the shunting air pipe, which is far away from the main stream air pipe, is communicated with the fermentation tank; the top of the fermentation tank is provided with a tail gas treatment device, the tail gas treatment device comprises a tower body, a purification cavity which is communicated up and down is arranged in the tower body, the bottom end of one side of the tower body is communicated with an air inlet pipe, and one end of the air inlet pipe, which is far away from the tower body, is communicated with the top of one side of the fermentation tank; an active carbon adsorption layer, a filter screen layer and a degradation layer are sequentially arranged in the purification cavity from top to bottom; the bottom end of one side of the fermentation tank is communicated with a liquid discharge pipe; the organic fertilizer production system can purify toxic tail gas generated in the fermentation process, and is not easy to cause environmental pollution and generate unpleasant smell.
Description
Technical Field
The invention relates to the technical field of organic fertilizer production, in particular to an organic fertilizer production system and a production method.
Background
The method is improved for 30 years, and livestock breeding in China is already prosperous with the opening and support of national policies, so that the production of the bio-organic fertilizer mostly takes livestock and poultry manure as a raw material, is matched with a multifunctional fermentation strain agent to quickly deodorize, decompose and dehydrate the manure, and is added with a functional microbial agent to prepare the organic fertilizer containing a certain amount of functional microorganisms.
The biological organic fertilizer can promote the proliferation of beneficial microbes in the rhizosphere of crops and improve the ecological environment of the rhizosphere of crops. The mass propagation of beneficial microorganisms and the increase of disease-resistant factors form a dominant population in a plant rhizosphere area, inhibit the growth and propagation of pathogenic microorganisms, and reduce the occurrence of plant diseases and insect pests: meanwhile, the beneficial microorganisms can induce plants to generate antibiotic substances and catalase and polyphenol oxidase of the plants, participate in defense reaction of the plants, improve the disease and insect pest resistance of the crops, reduce the disease index of continuous cropping crops, greatly relieve continuous cropping obstacles, secrete various metabolites to soil in the propagation process of the beneficial microorganisms in the bio-organic fertilizer, antagonize harmful microorganisms, promote the conversion of nutrients in the soil, improve the effectiveness of the soil nutrients, improve the nutritional conditions of the crops and increase the soil fertility.
However, the current organic fertilizer production system has some disadvantages, for example, the raw materials generate a large amount of tail gas in the fermentation process, and the tail gas is directly discharged into the environment, which easily causes environmental pollution and generates unpleasant odor.
Disclosure of Invention
The invention aims to provide an organic fertilizer production system and a production method, which aim to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an organic fertilizer production system comprises a fermentation tank, wherein a feed inlet is formed in the top of the fermentation tank, a discharge outlet is formed in the bottom of the fermentation tank, a fan is fixedly mounted on one side of the fermentation tank, an air outlet of the fan is communicated with a main stream air pipe, a shunt air pipe is uniformly communicated with the main stream air pipe, and one end, far away from the main stream air pipe, of the shunt air pipe is communicated with the fermentation tank; the top of the fermentation tank is provided with a tail gas treatment device, the tail gas treatment device comprises a tower body, a purification cavity which is communicated up and down is arranged in the tower body, the bottom end of one side of the tower body is communicated with an air inlet pipe, and one end of the air inlet pipe, which is far away from the tower body, is communicated with the top of one side of the fermentation tank; an active carbon adsorption layer, a filter screen layer and a degradation layer are sequentially arranged in the purification cavity from top to bottom; and the bottom end of one side of the fermentation tank is communicated with a liquid discharge pipe.
As a preferred technical scheme, the top end of one side of the feeding hole is rotatably connected with an anti-overflow door through a hinge, and after the raw materials are added into the fermentation tank, the anti-overflow door is closed to prevent tail gas from flowing into the air from the feeding hole; and the discharge hole is provided with a control electromagnetic valve.
As a preferred technical scheme, the purification cavity is connected with the tower body in an embedded mode, the top end of the purification cavity is fixedly connected with the tower body through the fixing bolt, the purification cavity is convenient to assemble and disassemble, the purification cavity is convenient to replace and clean, and the purification effect of the tail gas treatment device is guaranteed.
As a preferred technical scheme of the invention, the degradation layer comprises four photocatalyst plates and three ultraviolet lamps, the four photocatalyst plates are divided into two groups and are arranged on the inner walls of two sides of the purification cavity in a staggered manner, the three ultraviolet lamps are arranged between the photocatalyst plates at intervals, and the photocatalyst generates substances with strong oxidizing property under the illumination effect, can be used for decomposing organic compounds, partial inorganic compounds, bacteria, viruses and the like, and can efficiently purify tail gas.
The invention also provides a production method of the organic fertilizer, which comprises the following steps:
s1: preparing raw materials, collecting livestock and poultry manure, placing the livestock and poultry manure in a preparation tank, and adding auxiliary materials into the preparation tank;
s2: rolling, namely rolling the raw materials in the configuration tank through a rolling machine, and rolling the auxiliary materials added in the S1 to the bottom of the livestock and poultry manure;
s3: mixing and stirring, namely feeding the raw material which is rolled in the step S2 into a stirrer to be stirred for 20-35min, and adding zeolite powder to deodorize in the stirring process;
s4: fermenting, namely adding the mixed raw materials in the S3 into a fermentation tank through a feed inlet for fermentation, supplying air into the fermentation tank through a fan in the fermentation process, fermenting to generate tail gas, allowing the tail gas to enter the tower body through an air inlet pipe, adsorbing, filtering and degrading through an activated carbon adsorption layer, a filter screen layer and a degradation layer, and then discharging into the environment;
s5: after the fermentation is finished, the control electromagnetic valve is opened and the fermented product is led out through the discharge hole.
As a preferable technical scheme of the invention, the auxiliary materials in S1 comprise chaff, sawdust, rice straw, straws, leaves and other combustible and perishable waste gas substances.
Compared with the prior art, the invention has the beneficial effects that:
according to the organic fertilizer production system, the porosity of the activated carbon layer, the filtering property of the filter screen layer and the photocatalytic effect of the photocatalyst are utilized, so that harmful substances can be effectively adsorbed, filtered and degraded on tail gas generated in the fermentation process, peculiar smell is eliminated, environmental pollution is not easily caused, and unpleasant smell is not easily generated; the purification cavity is fixedly connected with the tower body through the fixing bolt, so that the device is convenient to disassemble and assemble, is convenient to replace and clean, and ensures the purification effect of the tail gas treatment device; according to the organic fertilizer production method, the organic fertilizer raw materials are rolled and stirred by the rolling machine and the stirrer, so that water consumption and evaporation in the livestock and poultry manure can be accelerated during rolling, and the auxiliary materials and the livestock and poultry manure are uniformly mixed during stirring, so that the fermentation time can be shortened.
Drawings
FIG. 1 is a schematic structural diagram of an organic fertilizer production system of the present invention;
fig. 2 is a schematic flow chart of the organic fertilizer production method of the invention.
In the figure: 1. a fermentation tank; 2. a feed inlet; 3. a discharge port; 4. a fan; 5. a main air duct; 6. a shunt air pipe; 7. a tower body; 8. a purification chamber; 9. an air inlet pipe; 10. an activated carbon adsorption layer; 11. a filter screen layer; 12. fixing the bolt; 13. a photocatalyst plate; 14. an ultraviolet lamp; 15. and a liquid discharge pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1-2, the present invention provides a technical solution: an organic fertilizer production system and a production method thereof comprise a fermentation tank 1, wherein a feed inlet 2 is formed in the top of the fermentation tank 1, a discharge outlet 3 is formed in the bottom of the fermentation tank 1, a fan 4 is fixedly mounted on one side of the fermentation tank 1, an air outlet of the fan 4 is communicated with a main stream air pipe 5, a diversion air pipe 6 is uniformly communicated with the main stream air pipe 5, and one end, far away from the main stream air pipe 5, of the diversion air pipe 6 is communicated with the fermentation tank; the top of the fermentation tank 1 is provided with a tail gas treatment device, the tail gas treatment device comprises a tower body 7, a purification cavity 8 which is communicated with the upper part and the lower part is arranged in the tower body 7, the bottom end of one side of the tower body 7 is communicated with an air inlet pipe 9, and one end, far away from the tower body 7, of the air inlet pipe 9 is communicated with the top of one side of the fermentation tank 1; an active carbon adsorption layer 10, a filter screen layer 11 and a degradation layer are sequentially arranged in the purification cavity 8 from top to bottom; the bottom end of one side of the fermentation tank 1 is communicated with a liquid discharge pipe 15.
Preferably, the top end of one side of the feeding hole 2 is rotatably connected with an anti-overflow door through a hinge; and a control electromagnetic valve is arranged on the discharge port 3.
Preferably, the purification cavity 8 is connected with the tower body 7 in an embedded manner, and the top end of the purification cavity 8 is fixedly connected with the tower body 7 through a fixing bolt 12.
Preferably, the degradation layer includes four photocatalyst plates 13 and three ultraviolet lamps 14, and four photocatalyst plates 13 divide into two sets, and crisscross setting is on the both sides inner wall of purifying chamber 8, and three ultraviolet lamps 14 interval sets up between photocatalyst plates 13.
The invention also provides a production method of the organic fertilizer, which comprises the following steps:
s1: preparing raw materials, collecting livestock and poultry manure, placing the livestock and poultry manure in a preparation tank, and adding auxiliary materials into the preparation tank;
s2: rolling, namely rolling the raw materials in the configuration tank through a rolling machine, and rolling the auxiliary materials added in the S1 to the bottom of the livestock and poultry manure;
s3: mixing and stirring, namely feeding the raw material which is rolled in the step S2 into a stirrer to be stirred for 20-35min, and adding zeolite powder to deodorize in the stirring process;
s4: fermenting, namely adding the mixed raw materials in the S3 into a fermentation tank 1 through a feed inlet 2 for fermentation, supplying air into the fermentation tank 1 through a fan 4 in the fermentation process, fermenting to generate tail gas, allowing the tail gas to enter a tower body 7 through an air inlet pipe 9, adsorbing, filtering and degrading through an activated carbon adsorption layer 10, a filter screen layer 11 and a degradation layer, and then discharging the tail gas into the environment;
s5: after the fermentation is finished, the control electromagnetic valve is opened and the fermentation liquid is led out through the discharge port 3.
Preferably, the auxiliary materials in S1 include chaff, sawdust, straw, stalks, leaves, and other combustible and perishable waste materials.
The working principle is as follows: placing the collected livestock and poultry manure in a configuration groove, adding chaff, sawdust, straw, straws, leaves and other combustible and perishable waste gas auxiliary materials into the configuration groove, then rolling the raw materials in the configuration groove through a rolling machine, rolling the auxiliary materials to the bottom of the livestock and poultry manure for consuming water in the livestock and poultry manure and accelerating moisture evaporation, then sending the rolled raw materials into a stirrer for stirring, so that the fermentation time can be shortened, and adding zeolite powder for deodorization in the stirring process; afterwards, add the raw materials that will mix in the fermentation cylinder 1 through feed inlet 2 and ferment, carry out the air feed through fan 4 in to the fermentation cylinder 1 in the fermentation process, the fermentation produces tail gas, tail gas passes through in the intake pipe 9 gets into tower body 7, and through active carbon adsorption layer 10, filter screen layer 11 and degradation layer and adsorb, filter, after the degradation eliminated the peculiar smell, discharge in the environment, be difficult for causing environmental pollution, be difficult for producing unpleasant smell, wherein purify through fixing bolt 12 fixed connection between chamber 8 and the tower body 7, easy dismounting, be convenient for change and wash, tail gas treatment device's purifying effect has been guaranteed.
It is worth noting that: whole device realizes controlling it through total control button, because the equipment that control button matches is equipment commonly used, belongs to current mature technique, no longer gives unnecessary details its electric connection relation and specific circuit structure again.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. An organic fertilizer production system is characterized by comprising a fermentation tank (1), wherein a feed inlet (2) is formed in the top of the fermentation tank (1), a discharge outlet (3) is formed in the bottom of the fermentation tank (1), a fan (4) is fixedly mounted on one side of the fermentation tank (1), an air outlet of the fan (4) is communicated with a main air pipe (5), a shunting air pipe (6) is uniformly communicated with the main air pipe (5), and one end, far away from the main air pipe (5), of the shunting air pipe (6) is communicated with the fermentation tank (1); the fermentation tank is characterized in that a tail gas treatment device is arranged at the top of the fermentation tank (1), the tail gas treatment device comprises a tower body (7), a purification cavity (8) which is communicated up and down is arranged in the tower body (7), an air inlet pipe (9) is communicated with the bottom end of one side of the tower body (7), and one end, far away from the tower body (7), of the air inlet pipe (9) is communicated with the top of one side of the fermentation tank (1); an active carbon adsorption layer (10), a filter screen layer (11) and a degradation layer are sequentially arranged in the purification cavity (8) from top to bottom; the bottom end of one side of the fermentation tank (1) is communicated with a liquid discharge pipe (15).
2. The organic fertilizer production system of claim 1, wherein: the top end of one side of the feeding hole (2) is rotatably connected with an anti-overflow door through a hinge; and a control electromagnetic valve is arranged on the discharge hole (3).
3. The organic fertilizer production system of claim 1, wherein: purify chamber (8) and tower body (7) embedded connection, and purify between the top of chamber (8) and tower body (7) through fixing bolt (12) fixed connection.
4. The organic fertilizer production system of claim 1, wherein: the degradation layer includes four photocatalyst boards (13) and three ultraviolet lamp (14), and four photocatalyst boards (13) divide into two sets ofly, and crisscross setting is on the both sides inner wall of purifying chamber (8), and three ultraviolet lamp (14) interval sets up between photocatalyst board (13).
5. The production method of the organic fertilizer is characterized by comprising the following steps of:
s1: preparing raw materials, collecting livestock and poultry manure, placing the livestock and poultry manure in a preparation tank, and adding auxiliary materials into the preparation tank;
s2: rolling, namely rolling the raw materials in the configuration tank through a rolling machine, and rolling the auxiliary materials added in the S1 to the bottom of the livestock and poultry manure;
s3: mixing and stirring, namely feeding the raw material which is rolled in the step S2 into a stirrer to be stirred for 20-35min, and adding zeolite powder to deodorize in the stirring process;
s4: fermenting, namely adding the mixed raw materials in the S3 into a fermentation tank (1) through a feeding hole (2) for fermentation, supplying air into the fermentation tank (1) through a fan (4) in the fermentation process, generating tail gas during fermentation, allowing the tail gas to enter a tower body (7) through an air inlet pipe (9), and discharging the tail gas to the environment after being adsorbed, filtered and degraded by an active carbon adsorption layer (10), a filter screen layer (11) and a degradation layer;
s5: after the fermentation is finished, the control electromagnetic valve is opened and the fermentation liquid is led out through the discharge hole (3).
6. The method for producing the organic fertilizer as claimed in claim 5, wherein the method comprises the following steps: the auxiliary materials in the S1 comprise chaff, sawdust, rice straw, straws, leaves and other combustible and perishable waste gas.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010449921.1A CN111646828A (en) | 2020-05-25 | 2020-05-25 | Organic fertilizer production system and production method |
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| CN202010449921.1A CN111646828A (en) | 2020-05-25 | 2020-05-25 | Organic fertilizer production system and production method |
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Cited By (3)
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| CN113477078A (en) * | 2021-07-27 | 2021-10-08 | 彭万红 | Microbial fermentation tail gas treatment device and method for biological product |
| CN114988934A (en) * | 2022-06-30 | 2022-09-02 | 刘勇何 | Organic fertilizer production system |
| CN115231960A (en) * | 2022-06-30 | 2022-10-25 | 刘勇何 | Organic fertilizer production process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113477078A (en) * | 2021-07-27 | 2021-10-08 | 彭万红 | Microbial fermentation tail gas treatment device and method for biological product |
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| CN114988934A (en) * | 2022-06-30 | 2022-09-02 | 刘勇何 | Organic fertilizer production system |
| CN115231960A (en) * | 2022-06-30 | 2022-10-25 | 刘勇何 | Organic fertilizer production process |
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Application publication date: 20200911 |