WO2020184327A1

WO2020184327A1 - Method for producing solid fertilizer retaining therein liquid fertilizer component-containing organic matter

Info

Publication number: WO2020184327A1
Application number: PCT/JP2020/009110
Authority: WO
Inventors: 雅哉齋藤
Original assignee: 雅哉齋藤
Priority date: 2019-03-11
Filing date: 2020-03-04
Publication date: 2020-09-17
Also published as: JP2022078376A

Abstract

The present invention provides a method for producing a liquid fertilizer component-containing solid fertilizer that is suitable for mass production at a large-scale industrial plant. According to the present invention, a solid fertilizer is produced by a method comprising: a step for obtaining liquid fertilizer component-containing organic matter by mixing, in natural organic matter, a liquid fertilizer containing 5-aminolevulinic acid, a derivative thereof, or a salt thereof as a fertilizer component, and drying the mixture at a temperature environment not higher than 150°C; and a step for adhering other fertilizer materials to the periphery of the liquid fertilizer component-containing organic matter at a contact temperature environment not higher than 150°C, and creating granules of a solid fertilizer that retains therein the liquid fertilizer component-containing organic matter.

Description

Manufacturing method of solid fertilizer that retains organic matter containing liquid fertilizer component inside

In the present invention, the liquid fertilizer component of a fertilizer normally in the state of liquid fertilizer such as 5-aminolevulinic acid, a derivative thereof or a salt thereof (hereinafter collectively referred to as "ALA") is water such as wheat flour, rice flour, horse bell flour, cellulose and the like. Liquid fertilizer suitable for mass production in large-scale plants by mixing it with coagulable natural organic powder, forming it into granules of organic matter containing liquid fertilizer components, drying it, and putting it into the granulation process of solid fertilizer. The present invention relates to a technique for producing component-containing solid fertilizer.

Liquid fertilizers, especially amino acid fertilizers, are generally attracting attention as fertilizers with less soil degradation. Among them, ALA has excellent effects such as improvement of photosynthetic activity and growth promotion, so that it is a growth promoter or photosynthetic activity improvement. It has high utility value as an agent, and the technology described in Patent Document 1 has already obtained a patent for its use.

However, while the work of spraying liquid fertilizer is more time-consuming than solid fertilizer, it is less convenient than solid fertilizer because the liquid fertilizer component is rapidly dissipated in the application environment and must be sprayed frequently. There was a place. Therefore, as a method of applying ALA, which is a liquid fertilizer, in a solid fertilizer, ALA is directly added dropwise to another solid fertilizer raw material, or sprayed or mixed, or crystallized ALA is used as another solid fertilizer raw material. A technique for providing a direct mixture has been devised as described in Patent Document 2, Patent Document 3, and Patent Document 4, and has already been patented.

Japanese Unexamined Patent Publication No. 04-338305 International Publication No. 2012/043470 Japanese Unexamined Patent Publication No. 2013-209241 Japanese Unexamined Patent Publication No. 2014-189469 JP-A-11-158010 Japanese Patent Application No. 2018-050486 (Patent No. 6491380)

The technology described in Patent Document 1 is a basic patent regarding the use of ALA as a fertilizer, but it is a specific form of providing ALA as a fertilizer to the world. There is no description of the method, in particular the technique for providing ALA, which is usually in the state of liquid fertilizer, as a solid fertilizer that is easy to apply. On the other hand, the techniques described in Patent Documents 2 to 4 are techniques for a method of enhancing the storage stability of ALA and providing it by containing it in a solid fertilizer, but all of them are suitable for mass production as described later. Not enough, especially for the purpose of producing solid fertilizer containing ALA in large fertilizer production plants with a daily production capacity of several hundred to several thousand tons, each of which has an obstacle and is difficult to apply. There was a problem.

As described below, the present invention basically relates to a technique for mixing a liquid fertilizer component with a solid fertilizer to improve convenience at the time of application, but in particular, it is destabilized under certain conditions. Alternatively, the storage stability of ALA, which decomposes, can be further improved, the slow release of ALA can be ensured for a longer period of time, and the obstructive factors of the techniques described in Patent Documents 2 to 4 can be eliminated. By doing so, it is characterized by including a technique that enables mass production of ALA-containing solid fertilizer even in a large-scale fertilizer production plant or the like.

For example, in claim 4, ALA and fats and oils are mixed so that the solid fertilizer, which is characterized by containing ALA and fats and oils substantially uniformly in the solid fertilizer, and ALA and fats and oils are substantially uniform. There is a description about a method for producing the solid fertilizer, which is characterized by the above. Further, in Patent Document 4, the addition of fats and oils has a remarkable effect on improving the stability of ALA, and particularly when the fats and oils component and ALA are substantially uniformly contained in the solid fertilizer. The definition of a mixed state in which a high stabilizing effect can be obtained, and substantially uniform means a state in which the ALA component and the oil and fat component are mixed so as to be uniformly distributed, and the solid fertilizer of the present invention. Can be produced by adding fats and oils to ALA and mixing, or by adding and mixing ALA to fats and oils. As a method of adding fats and oils, the oils and fats can be heated or cooled at room temperature to form a solid or fat. There are descriptions such as a method of adding a semi-solid substance in an appropriate size, a method of dropping a liquid substance, and the like.

The technical problem described in Patent Document 4 has commonality with the problem of the present invention in that it provides a solid fertilizer with improved storage stability of ALA. However, according to the general general technical knowledge, liquid fertilizer ALA is mixed and kneaded with water-aggregating natural organic powder such as wheat flour, rice flour, horse bell flour, and cellulose, which are not solid fertilizer raw materials, and the liquid fertilizer component. It is molded into granules of contained organic matter, dried to reduce water activity, coated with it if desired, re-dried, and later mixed with other solid fertilizer materials to granulate, and ALA is solid fertilizer. While the technique described in Patent Document 4 is a technique for improving the storage stability of ALA by holding it inside a granular material or the like mixed in the inside of the above, the technique described in Patent Document 4 is substantially uniform between ALA and fats and oils as subcomponents. The technical idea for the method for improving the storage stability is fundamentally different in that the storage stability of ALA is improved by the method of directly mixing the mixture so as to be contained in.

Further, regarding the method of mixing ALA and other solid fertilizer raw materials, in the technique of the present invention, the organic matter containing the liquid fertilizer component and other solid fertilizer raw materials cannot be uniformly contained, and the other solid fertilizer raw materials contain the liquid fertilizer component. It is in a state of being attached to the surroundings of organic matter. On the other hand, the technique described in Patent Document 4 is fundamentally different in the technical idea in that it shows the necessity of mixing and molding ALA and fats and oils as subcomponents so as to be substantially uniform. For example, in the case of mass-producing solid fertilizer containing ALA in a large-scale solid fertilizer production plant by applying the technique described in Patent Document 4, ALA is used for the production process established under the optimum design. It becomes necessary to add special equipment and processes for mixing and molding fats and oils so as to be substantially uniform at a large cost, which is a major impediment to economic efficiency.

Further, in a large fertilizer manufacturing plant, regular repair of equipment at regular intervals is usually indispensable, but a considerable amount of fat and oil components are mixed in addition to the solid fertilizer raw material which is a technical premise of the manufacturing process in accordance with the technique described in Patent Document 4. In that case, it will stick to the inner surface of the equipment as a scale containing oils and fats, which will cause adverse effects such as an increase in the amount of scale removal work during regular repairs and a longer repair period, which is also a major impediment to economic efficiency. Become.

Further, Patent Document 3 claims include a step of spray-adding ALA, a solid fertilizer containing bone powder and citric acid, and a solution containing ALA to a solid fertilizer raw material containing bone powder and citric acid, and a step of molding. There is a description about the method of producing solid fertilizer including. Further, in Patent Document 3, the point that a solid fertilizer having excellent long-term storage stability of ALA can be obtained by blending citric acid without impairing moldability, and a mixture of fertilizer raw materials containing bone powder and citric acid A method for producing a solid fertilizer by spraying and adding an ALA solution to granulate, a method for producing a solid fertilizer by spraying and adding an ALA solution to a mixture of fertilizer raw materials containing pre-granulated bone powder and citric acid, and mixing the bone powder and citric acid with ALA crystals. There is a description about the manufacturing method of solid fertilizer, etc.

The object of the technique described in Patent Document 3 has commonality with the object of the present invention in that it aims to provide a solid fertilizer containing ALA in order to easily apply ALA with a small number of applications. However, according to the general general technical knowledge, liquid fertilizer ALA is mixed and kneaded with water-aggregating natural organic powders such as wheat flour, rice flour, horse bell flour, and cellulose, which are not solid fertilizer raw materials, and then liquid fertilizer. It is molded into granular matter containing organic matter, dried to reduce water activity, coated with it if desired, re-dried, and later mixed with other solid fertilizer materials to granulate, and ALA is solidified. While it is a technique for providing ALA as a solid fertilizer that can be easily applied by holding it inside a granular material or the like mixed inside the fertilizer, the technique described in Patent Document 3 uses ALA as a subcomponent such as bone meal and bone powder. The technical idea for the solidification method is fundamental in that the solid fertilizer containing the ALA component is provided by directly spraying and adding to the solid fertilizer raw material containing citric acid, adhering to the surface, or directly mixing. Different.

When mass-producing solid fertilizer containing ALA by utilizing an existing large-scale solid fertilizer production plant, the large-scale solid fertilizer production plant usually requires the technical premise of the production process in order to maximize its capacity. In order to specify the raw material components of solid fertilizer in advance and make an optimum design, when adding a considerable amount of raw material components such as citric acid and bone powder other than the technical premise of the manufacturing plant in accordance with the technique described in Patent Document 3. Is the same as the case of the technique described in Patent Document 4, in that it is necessary to add special equipment and processes at a large cost, which is a major obstacle in terms of economic efficiency.

In addition, although large-scale fertilizer production plants usually require regular repairs of equipment at regular intervals, a considerable amount of citric acid and bone powder components other than solid fertilizer raw materials, which are technical prerequisites for the production process, are in accordance with the technology described in Patent Document 3. If they are mixed, they will stick to the inner surface of the equipment as scales, causing adverse effects such as an increase in the amount of scale removal work during regular repairs and a longer repair period, which will be a major impediment to economic efficiency. The point is the same as the case of the technique described in Patent Document 4.

Further, Patent Document 2 claims a solid fertilizer containing ALA and a solid fertilizer raw material containing either ammonium nitrate or ammonium sulfate or phosphoric acid, and a solid fertilizer containing either ammonium nitrate or ammonium sulfate or phosphoric acid. There is a description about a method for producing the solid fertilizer, which includes a step of spraying and adding a solution containing ALA to the raw material and a step of drying. Further, the specification of Patent Document 2 describes a method for producing a solid fertilizer by spraying and adding an ALA solution while rolling the solid fertilizer raw material, and adding the ALA solution to the solid fertilizer raw material in advance and then mixing and granulating. There is a description of a production method, a production method of spraying and adding an ALA solution to the granulated solid fertilizer raw material, and the like. Further, in Patent Document 2, ALA, which has a property of becoming unstable when the pH value rises, is solid after mixing by mixing with either ammonium nitrate or ammonium sulfate or an acidic fertilizer raw material such as phosphoric acid. It has been suggested that the solid fertilizer is stably preserved inside the fertilizer, and that the solid fertilizer is coated with a coating material such as paraffin wax in order to exert the effect of ALA contained in the solid fertilizer more sustainably.

The object of the technique described in Patent Document 2 has commonality with the object of the present invention in that it aims to provide a solid fertilizer containing ALA so that ALA can be easily applied with a small number of applications. However, according to the general general technical knowledge, liquid fertilizer ALA is mixed and kneaded with water-aggregating natural organic powders such as wheat flour, rice flour, horse bell flour, and cellulose, which are not solid fertilizer raw materials, and the liquid fertilizer component. It is molded into granules of contained organic matter, dried to reduce water activity, coated with it if desired, re-dried, and later mixed with other solid fertilizer materials to granulate, and ALA is solid fertilizer. While it is a technique for providing ALA as a solid fertilizer that can be easily applied by holding it inside a granular material or the like mixed in the inside of the above, the technique described in Patent Document 2 uses ALA as a subcomponent, ammonium nitrate or ammonium sulfate. A technique for solidification methods in that a solid fertilizer containing an ALA component is provided by directly spraying and adhering to a surface or by directly mixing a solid fertilizer raw material containing any of the above or phosphoric acid. The idea is fundamentally different.

Further, regarding the necessity of mixing ALA and other solid fertilizer raw materials, and the components of other solid fertilizer raw materials to be mixed with ALA, the technique of the present invention can be applied as a solid fertilizer even with a liquid fertilizer component-containing organic substance alone. If necessary, the liquid fertilizer component-containing organic substance can be mixed with any other solid fertilizer raw material and molded by coating it with a coating material having non-invasiveness to other solid fertilizer raw materials to be mixed. The technical idea for mixing is fundamentally different in that the technique described in 2 requires various conditional restrictions on the composition and composition of other solid fertilizer raw materials to be mixed with ALA.

For example, especially when the technique described in Patent Document 2 is to be applied to mass production of solid urea fertilizer by a large fertilizer plant, it has been optimized and established for the purpose of synthesizing ammonia and urea from hydrogen raw materials and granulating them. In the middle of a series of manufacturing processes, it becomes necessary to additionally insert a step of mixing a considerable amount of either ammonium nitrate or ammonium sulfate, or phosphoric acid, drying, and optionally coating. In this case, since a large urea fertilizer plant generally has a production capacity of several hundred to several thousand tons per day, basically, additional processes such as mixing of auxiliary materials, stirring, drying, and coating are also required. It is necessary to install them on the same factory premises with the same or higher processing capacity as the processes before and after that. This is because if the processing capacity of these additional processes is less than the processing capacity of the processes before and after that, or if they are geographically separated, the processing amount of that part is small or during transportation. This is because changes in the temperature of work-in-process raw materials become a bottleneck, that is, an obstacle factor for the entire production capacity of the entire facility. Given the high general construction costs of plant-related equipment, additional investment to eliminate those bottlenecks will reduce the price competitiveness of the fertilizer products produced, and the products will be removed from the market. It becomes a risk. Therefore, it is considered to be very difficult to remove this inhibitory factor mainly from the economical point of view.

On the other hand, when the technique of the present invention is applied to the mixing of ALA and other solid fertilizer materials, the production of the liquid fertilizer component-containing organic matter does not need to be performed in a place close to the fertilizer production plant, and a large amount and efficiency are obtained in advance at another place. Can be manufactured in large quantities and stored in large quantities. That is, by applying the technique of the present invention, in the existing granulation process of a fertilizer plant such as large urea, a required amount of liquid fertilizer component-containing organic matter produced in a large amount efficiently at another place is added at a timely and appropriate timing. It is possible to produce a large amount of solid fertilizer mixed with organic matter containing a liquid fertilizer component without hindering the equipment production capacity of a large fertilizer plant.

Further, Patent Document 2 suggests a method of coating a solid fertilizer to which ALA is added or mixed with a coating material such as paraffin wax in order to control the release property of ALA in order to enhance the sustainability of the effect as a fertilizer. However, this point seems to have similarities to the technique of the present invention for coating an organic substance containing a liquid fertilizer component. However, while the technique described in Patent Document 2 is a method of completely coating the solid fertilizer itself after granulation containing ALA, in the technique of the present invention, only the liquid fertilizer component-containing organic substance mixed with ALA is to be coated. The two technical ideas for the object and method of coating are fundamentally different in that the solid fertilizer itself does not need to be coated even when mixed with other solid fertilizer raw materials.

According to the technique described in Patent Document 2, the coated solid fertilizer is decomposed more slowly in the applied soil, and the release property of ALA is controlled through its slowness, but it is applied at the same time. Since the coated solid fertilizer of the same material is decomposed at about the same time in the same soil environment, the release of ALA is also started at about the same time. On the other hand, if the technique of the present invention is applied and a plurality of types of liquid fertilizer component-containing organic substances coated with different decomposition rates or different coating times are combined and mixed with other mixed solid fertilizer raw materials, ALA can be produced even in the same soil environment. It is possible to prevent the release from occurring all at the same time, and to maintain the slowness of the release for a longer period of time. In light of the object of the present invention in which the slowness of the release of ALA is desired to be maintained for a longer period of time, the technique of Patent Document 2 for completely covering the solid fertilizer itself after granulation has an inhibitory factor.

Further, when the coating technique described in Patent Document 2 is applied to a solid fertilizer containing urea as a main component, two additional inhibiting factors occur.

That is, the first point is that urea is a fertilizer that is usually used with the expectation of its immediate effect, but when the solid urea fertilizer itself is coated with wax or the like by the technique described in Patent Document 2, the urea component The release is not carried out until the coating is decomposed and peeled off, which is an obstacle to the immediate effect of urea fertilizer.

The second point is that ammonium carbonate is temporarily produced in the process of hydrolysis of urea in the soil environment, and the pH of the soil is temporarily adjusted for a certain period by the action of ammonium ions dissolved in the water of the soil. Due to the known fact that it is highly probable to increase. That is, even if the solid urea fertilizer itself is coated according to the technique described in Patent Document 2, the situation in which urea and ALA are released at the same time does not change. Therefore, the pH of the soil by ammonium ions is approximately the same as the release of ALA. It is likely that an increase will occur and destabilize ALA. This point becomes a big hindrance factor in utilization when the solid urea fertilizer containing ALA is provided by the technique described in Patent Document 2.

The technique of the present invention provides an effective solution to these two obstacles when the technique described in Patent Document 2 is applied to the production of solid urea fertilizer. The solution to the first point of inhibiting factor is that the technique of the present invention does not need to coat the solid urea fertilizer itself, so that the immediate effect of urea is not inhibited at all. In addition, the solution to the second inhibitory factor is to delay the timing of release of ALA to the application environment with respect to the generation of ammonium carbonate when coating the organic matter containing the liquid fertilizer component by applying the technique of the present invention. It is a point that the time control of making it is feasible. This is because the general period from the application of solid urea fertilizer to the generation and decomposition of ammonium carbonate, that is, the period when the pH of the soil is likely to rise, is generally the soil properties, seasonal humidity, and temperature of the application area. Since it can be estimated depending on the situation and can be specified as several to dozens of patterns, the design conditions for coating processing of organic matter containing liquid fertilizer components are set in advance so that ALA is not released during that period. If specified and coated, the solid urea fertilizer can be provided with a lagging release function so that ALA is released into the application environment after the influence of the pH increase due to ammonium carbonate is eliminated. Large urea fertilizer plants are often constructed close to consumption areas such as developing countries and regions with a large population, that is, countries or regions to which they are applied. However, if the technique described in the present invention is applied, the countries to which they are applied can be applied. Alternatively, it becomes possible to produce an ALA-containing solid urea fertilizer having a lagging release function that is highly compatible with the local climate and soil environment.

The specification of Patent Document 1 suggests that ALA can be used as a soil treatment agent even when mixed with any other fertilizer or the like as long as the effect of ALA is not lost. , The problem recognition behind it is similar to the present invention. In other words, if urea and ALA are mixed and applied as they are, it is probable that ammonium ions that can be generated in the process of decomposing urea raise the pH of the soil and decompose ALA in the soil to lose the effect of ALA. Is a high combination, and when urea is in a high temperature state, especially in a molten state inside a fertilizer production plant, even if the temperature is lower than the decomposition temperature of ALA, a trace amount of ammonia derived from urea It is a combination that cannot be mixed directly because ALA is decomposed by the action. That is, urea is an ALA as a solid fertilizer raw material applied to soil at the same time as ALA, or as a solid fertilizer raw material directly mixed with ALA in a fertilizer production plant, as Patent Document 1 suggests as an inhibitory factor. It corresponds to the one that loses the effect of ALA, and the provision of a combination of ALA and urea itself has been an obstacle to the effective use of ALA.

In that respect, based on the present invention, fertilizer companies, grain flour handlers, etc., in which ALA is mixed in an organic substance containing a liquid fertilizer component, dried, coated with a coating material having a lagging release property, and mixed with urea. However, by using a novel method that cannot usually be conceived, it is possible to realize an ALA-containing solid fertilizer that can be easily applied without impairing the effectiveness of ALA during both production and use. As a matter of course, there is no description or suggestion in Patent Documents 1 to 5 regarding such technical features of the present invention.

By the way, the technique described in Patent Document 5 is a technique for improving the effect of a foliage treatment agent that directly adheres to the leaves and stems of plants by using ALA. Therefore, a solid fertilizer to be sprayed on the application environment is used. Its purpose is completely different from the intended technique of the present invention. Further, Patent Document 6 is the application number of the patent for which the patent has been granted by the applicant of the application of the present application, but the publication in the patent gazette has not been completed and it is not a known technique.

For the purpose of making it possible to easily use a liquid fertilizer component such as ALA as a solid fertilizer, the technique of the present invention is generally used to condense water such as wheat flour, rice flour, horse belly flour, cellulose, etc., which are not solid fertilizer raw materials. Liquid fertilizer ALA is mixed and kneaded with the powder of natural organic matter having properties, formed into granules of organic matter containing liquid fertilizer component, dried to reduce water activity, and coated with it again if desired. A device that is difficult to come up with by combining ordinary technical wisdom, such as drying, then mixing with other solid fertilizer materials to granulate, and holding ALA inside the granules mixed inside the solid fertilizer. In addition, by devising them, the slow release property of the liquid fertilizer component for a longer period of time, the mixture of ALA and high temperature urea, which had a technically inhibitory relationship, and the lagging release property of ALA were ensured. It realizes progressive effects that are not included in the conventional technical knowledge, such as prevention of decomposition of ALA in the application environment. These ideas and their effects cannot be easily conceived even if a person skilled in the art adds ordinary technical common sense to the techniques described in Patent Documents 1 to 5. It should be noted that the relationship between the techniques of Patent Documents 1 to 4 and the techniques of Patent Documents 2, 3 and 4 is intended to enhance the storage stability of ALA and to provide it as a solid fertilizer that can be easily applied. Although it has the relationship and similarity between the technique of 1 and the technique of the present invention, the progress of the technique of the present invention with respect to the current common general knowledge is described in Patent Documents 2, 3 and 4 which have already been patented. The technology is by no means inferior to the progressiveness it would have had for the common technical wisdom at the time they were filed.

In the present invention, (a) a liquid fertilizer containing 5-aminolevulinic acid, a conductor thereof or a salt thereof as a fertilizer component is mixed with a natural organic matter and dried in a temperature environment of less than 150 degrees Celsius to obtain a liquid fertilizer component. The step of obtaining the contained organic matter and (b) a solid fertilizer in which another fertilizer material is adhered around the liquid fertilizer component-containing organic matter in a contact temperature environment of less than 150 degrees Celsius to hold the liquid fertilizer component-containing organic matter inside. It is a method for producing solid fertilizer having a step of granulating.

Further, the present invention contains a liquid fertilizer component by mixing a liquid fertilizer containing 5-aminolevulinic acid, a conductor thereof or a salt thereof as a fertilizer component with a natural organic matter and drying it in a temperature environment of less than 150 degrees Celsius. This is a method for producing an organic substance containing a liquid fertilizer component for obtaining an organic substance.

By using the technique of the present invention, a fertilizer provided as a normal liquid fertilizer such as ALA can be used as a simple solid fertilizer for application work or as a solid fertilizer mixed with other solid fertilizer raw materials, and has excellent storage stability and stability. It can be manufactured and provided economically with quality, and is highly convenient for both fertilizer producers and agricultural producers.

By using the technique of the present invention, a solid urea fertilizer mixed with ALA can be produced while realizing long-term storage stability and slow release of ALA, which is easily destabilized or decomposed depending on pH and temperature. It is highly convenient for both fertilizer producers and agricultural producers because it can be mass-produced using known manufacturing techniques.

Even when the technique of the present invention is applied to the production of solid fertilizer containing a liquid fertilizer component of a fertilizer normally provided as a liquid fertilizer such as ALA, it is only necessary to add an organic substance containing the liquid fertilizer component as one of the feed stocks, and the existing large fertilizer It is highly convenient for fertilizer producers because it is not necessary to add additional equipment that requires a large amount of investment to production equipment such as manufacturing plants.

As the raw material of the powder used as the base material of the organic matter containing the liquid fertilizer component used in the present invention, it is possible to utilize materials that are not edible, such as low quality or powder of rice or wheat whose expiration date has passed. Highly socio-economically convenient.

It is a front sectional view of the solid fertilizer which holds the granular matter of the liquid fertilizer component containing organic matter produced based on this invention inside. It is a front sectional view of the solid fertilizer which holds the section of the organic matter containing liquid fertilizer component produced based on this invention inside.

In a typical embodiment of the present invention, liquid fertilizer containing ALA as a fertilizer component is mixed and kneaded with powder of a natural organic substance having water aggregation properties such as wheat flour, rice flour, horse bell flour, cellulose, etc., and formed into a spherical shape. The granules of the organic matter containing the liquid fertilizer component were dried in a temperature environment of less than 150 degrees Celsius, and coated with a coating material such as a biodegradable resin solution such as polylactic acid whose pH was adjusted to 7.0 or less, if desired. After drying again in a temperature environment of less than 150 degrees Celsius, in the granulation process kept in a contact temperature environment of less than 150 degrees Celsius, other solid fertilizer materials such as urea are adhered to the surroundings to perform coating granulation. This is a method for producing a granular solid fertilizer in which granular substances of an organic substance containing an ALA liquid fertilizer component are retained as raw material particle nuclei.

In the present invention, first, a liquid fertilizer containing 5-aminolevulinic acid, a conductor thereof or a salt thereof (ALA) as a fertilizer component is mixed with a natural organic matter, and dried in a temperature environment of less than 150 degrees Celsius. An organic substance containing a liquid fertilizer component is obtained (step (a)).

As the natural organic matter, for example, wheat, rice, potato, cellulose, or other natural organic matter having water cohesiveness can be used. The reason why powders of water-aggregating natural organic substances such as wheat flour, rice flour, horse bell flour, cellulose, etc. are used as the material of the organic matter containing the liquid fertilizer component to which ALA, which is the liquid fertilizer, is mixed, is that these powders are generally available. This is because it is easy to use and does not pollute the environment during application. In addition, the liquid fertilizer component-containing organic substance may be added with an additive having a thickening function such as a paste for the purpose of increasing its strength, or may be subjected to a heat treatment process such as steaming with steam.

In the present invention, it is preferable to use cellulose as a natural organic matter. As the cellulose, for example, commercially available toilet paper can be used. Cellulose is an industrially produced material that has a low risk in terms of supply and quality, and has a higher solubility than grains such as wheat, rice, and potatoes, so that ALA is decomposed before the decomposition of ALA progresses. It can diffuse into the soil.

The natural organic matter may be in the form of powder or in the form of a sheet. When powdered natural organic matter is used, the liquid fertilizer component-containing organic matter can also be obtained by mixing the natural organic matter and liquid fertilizer and drying in a temperature environment of less than 150 degrees Celsius. However, in order to improve the drying efficiency, a sheet is once used. It is preferable to make it into a shape. Specifically, a powdered natural organic matter kneaded with liquid fertilizer is made into a sheet, dried in a temperature environment of less than 150 degrees Celsius, and cut or crushed into a plurality of sections to obtain a liquid fertilizer component-containing organic matter. Is preferable. When using sheet-shaped natural organic matter, the sheet-shaped natural organic matter is moistened by spraying, dropping, or dipping liquid fertilizer, dried in a temperature environment of less than 150 degrees Celsius, and cut into multiple sections or cut into multiple sections. By crushing, an organic matter containing a liquid fertilizer component can be obtained.

Further, in the present invention, the contact temperature environment when drying is set to less than 150 degrees Celsius because the decomposition temperature of the ALA component is 151 degrees Celsius. Similarly, the contact temperature environment in the manufacturing apparatus in the coating granulation step of mixing with other solid fertilizer raw materials needs to be kept below 150 degrees Celsius in order to avoid decomposition of the ALA component. In the case of mixing with urea, the melting point temperature of urea at normal pressure is 133 degrees Celsius, and it can be assumed that the temperature of molten urea exceeds 150 degrees Celsius depending on the position in the manufacturing equipment such as a fertilizer plant. The temperature of the solid fertilizer raw material after the step of mixing the solid fertilizer raw material and the organic substance containing the liquid fertilizer component and the contact temperature environment of the manufacturing facility with which the solid fertilizer raw material comes into contact are maintained at less than 150 degrees Celsius below the decomposition temperature of ALA. If so, there is no practical problem.

Further, in the present invention, the reason for drying the liquid fertilizer component-containing organic matter mixed with the liquid fertilizer component such as ALA once is primarily to prevent the water activity in the liquid fertilizer component-containing organic matter and generally prevent the growth of bacteria, molds, etc. for a long period of time. This is to reduce it to about 0.7 to 0.5 or less. As a result, the storage stability of the liquid fertilizer component-containing organic matter and the liquid fertilizer component mixed therein is dramatically improved. In addition, in order to uniformly coat the liquid fertilizer component-containing organic matter and to properly mix the liquid fertilizer component-containing organic matter with the solid fertilizer raw material, the liquid fertilizer component-containing organic matter is dried once at this stage, and one grain is used. It is more desirable to break each grain into an independent state. When the organic matter containing the liquid fertilizer component is used as the core of the coating granulation method in which another solid fertilizer raw material is attached to the surroundings, the size is considered to be preferably a size of 1 mm to 5 mm in diameter, but the solid fertilizer as the final product. Other sizes may be used depending on the size of. Further, when an organic substance containing a liquid fertilizer component is mixed in advance with another liquid solid fertilizer raw material and used for producing a solid fertilizer by the preling granulation method, the upper limit of the particle size of the solid fertilizer by the preling granulation method is generally 0. The size is about 7 to 0.8 mm, and the diameter of the ejection nozzle of the liquid solid fertilizer raw material is not considered to exceed the size of about 0.6 to 0.7 mm, which is about 80% of that, so organic matter containing liquid fertilizer components. It is considered that the size of the above is preferably a size having a diameter of 0.6 mm or less.

The liquid fertilizer component-containing organic substance obtained here can be used as it is in the next step (b) described later, but before that, a film of a coating material is formed around the liquid fertilizer component-containing organic substance (step (c)). ) Is preferable. As a method of forming a coating material film around the liquid fertilizer component-containing organic substance, for example, a coating material-containing solution having a pH adjusted to 7.0 or less is used for coating treatment, and the temperature environment is less than 150 degrees Celsius. A method of drying again can be mentioned. The coating material used here preferably contains a biodegradable resin such as polylactic acid.

The pH of the liquid coating material-containing solution is adjusted to 7.0 or less because ALA has the property of destabilizing when placed in an alkaline environment with a pH of 7.0 or more. The reason is that if the pH of the material-containing solution exceeds 7.0 and becomes alkaline, ALA may be decomposed in the process of coating.

Further, in the present invention, the liquid fertilizer component-containing organic matter is coated and re-dried to prevent urea in a high temperature state from infiltrating the liquid fertilizer component-containing organic matter and coming into contact with the ALA component, considering the case of mixing with the urea fertilizer raw material. There is also a purpose. This is because although urea fertilizer is classified as a neutral fertilizer, the pH of high-temperature urea, especially urea in a molten state in a manufacturing facility, is 7.0 to 8.0, which is slightly alkaline. This is because there is a high risk that ALA will become unstable and decompose due to contact with. Further, since urea produces ammonia in a small amount when heated, there is also a problem that when it infiltrates into a liquid fertilizer component-containing organic substance, it reacts with ALA and decomposes ALA. In addition, urea may function as a catalyst in a high temperature environment and promote a chemical reaction of a substance having a carbonyl group such as ALA. Considering these problems, coating the liquid fertilizer component-containing organic matter to protect the ALA component from infiltration and contact with urea and urea-derived ammonia greatly contributes to improving the storage stability of ALA during the manufacturing process. .. Depending on the properties of the surface of the organic matter containing the liquid fertilizer component and the surface of the coating material, the degree of adhesion of other solid fertilizer raw material liquids may not be good in the coating method granulation process. In order to promote the formation of liquid crosslinks between the solid fertilizer raw material liquids, the solid fertilizer raw material liquid component to be adhered in advance is thinly adhered to the surface of the organic matter containing the liquid fertilizer component by means such as dropping or spraying, and then the coating method granulation step. The problem is solved by the method of throwing it as the core of.

It is preferable to prepare a plurality of liquid fertilizer component-containing organic substances having different amounts and / or types of coating materials formed around the liquid fertilizer component-containing organic substances, and to mix the plurality of liquid fertilizer component-containing organic substances. In this way, if a plurality of types of liquid fertilizer component-containing organic substances coated with different decomposition rates or different coating times are combined and mixed with other mixed solid fertilizer raw materials, the release of ALA can be performed at the same time even in the same soil environment. It can be avoided and the slowness of release can be maintained for a longer period of time.

For example, prepare four types of liquid fertilizer component-containing organic substances having different amounts and / or types of coating materials to be a film formed around the liquid fertilizer component-containing organic substances. Each is coated so that the coating material decomposes in about 2 weeks, about 4 weeks, about 6 weeks, and about 8 weeks. Then, these four types of liquid fertilizer component-containing organic substances are mixed evenly in advance, and then solid urea fertilizer, which will be described later, is mixed to produce solid fertilizer. By doing so, ALA is slowly released at intervals of about every two weeks, and as a whole, the same effect as sprinkling ALA four times every two weeks is obtained, so to speak, a "sustained release timer function" is exhibited. Will be.

Then, another fertilizer material is adhered around the liquid fertilizer component-containing organic matter obtained above in a contact temperature environment of less than 150 degrees Celsius to granulate a solid fertilizer that retains the liquid fertilizer component-containing organic matter inside (step). (B)). As another fertilizer material, it is preferable to use urea. Examples of the granulation method include a coated granulation method, a pre-ring granulation method, and a rolling method.

As described above, in the typical solid fertilizer of the present invention, as shown in FIG. 1, a film 103 is formed around the granular matter 102 of the organic substance containing the liquid fertilizer component, if desired, with a biodegradable resin or the like, and further, the liquid fertilizer is further formed. It is coated with a solid fertilizer raw material 101 other than the component-containing organic matter. Further, in the preferred solid fertilizer of the present invention, as shown in FIG. 2, a film 203 is formed around the section 202 of the liquid fertilizer component-containing organic substance, if desired, with a biodegradable resin or the like, and solids other than the liquid fertilizer component-containing organic substance. The fertilizer raw material 201 is coated. The liquid fertilizer component-containing organic matter is not limited to granules and sections, but may be rod-shaped. For example, by processing a stick-shaped organic matter containing a liquid fertilizer component such as a popsicle stick or a toothpick, for example, by inserting a stick-shaped liquid fertilizer component-containing organic matter into the soil in a flowerpot or a planter, the liquid fertilizer component is supplied to the soil. be able to. However, when the liquid fertilizer component-containing organic matter is coated with a solid fertilizer raw material, as described above, the liquid fertilizer component-containing organic matter is preferably granular or section-like, and the solid fertilizer at that time is usually granular. ..

The liquid fertilizer component-containing organic substance used in the present invention may be damaged by animals such as birds when exposed to the ground surface after application, but in order to reduce the damage, visibility is improved. It may be colored in a low color, flavored or flavored with an irritating seasoning component such as capsaicin, or other flavoring component, or a repellent or the like for preventing feeding damage by animals may be attached. These coloring, flavoring, flavoring and other processing may be carried out by a method of mixing in advance in the process of producing an organic substance containing a liquid fertilizer component, or a method of mixing these components with a covering material and adhering them to the surface.

In the present invention, a trace component such as iron that improves the effect of fertilizer by being released into the application environment at the same time as the ALA component, or a neutralizing agent component for neutralizing the acidic or alkaline component of the soil is used. , The liquid fertilizer component-containing organic matter can be added directly at the time of production, or can be added in advance to the mixed liquid fertilizer.

The liquid fertilizer component-containing organic matter used in the present invention is not subject to geographical restrictions such as the country or region to which it is applied and the distance from the fertilizer production facility, and is most economically efficient using the optimum production facility at the optimum location. Moreover, it is possible to manufacture with stable quality. Due to this feature, the production of fertilizer to which the technique of the present invention is applied can be stably maintained and continued with economic rationality.

101 Solid fertilizer raw material other than liquid fertilizer component-containing organic matter 102 Granules of liquid fertilizer component-containing organic matter 103 Coating 201 Solid fertilizer raw material other than liquid fertilizer component-containing organic matter 202 Section 203 coating of liquid fertilizer component-containing organic matter

Claims

(A) A liquid fertilizer containing 5-aminolevulinic acid, its conductor or a salt thereof as a fertilizer component is mixed with a natural organic substance and dried in a temperature environment of less than 150 degrees Celsius to obtain a liquid fertilizer component-containing organic matter. Process and
(B) The present invention includes a step of adhering another fertilizer material around the liquid fertilizer component-containing organic matter in a contact temperature environment of less than 150 degrees Celsius to granulate a solid fertilizer that retains the liquid fertilizer component-containing organic matter inside. Method of producing solid fertilizer.
In the step (a), the liquid fertilizer is moistened with the sheet-shaped natural organic matter, dried in a temperature environment of less than 150 degrees Celsius, and cut or crushed into a plurality of sections to obtain the liquid fertilizer component-containing organic matter. The method for producing a solid fertilizer according to claim 1.
In the step (a), the liquid fertilizer component is obtained by kneading the liquid fertilizer with the powdered natural organic matter into a sheet, drying it in a temperature environment of less than 150 degrees Celsius, and cutting or crushing it into a plurality of sections. The method for producing a solid fertilizer according to claim 1, wherein the contained organic matter is obtained.
Before the step (b),
(C) A step of forming a coating material around the organic substance containing the liquid fertilizer component.
The method for producing a solid fertilizer according to any one of claims 1 to 3, further comprising.
The method for producing a solid fertilizer according to claim 4, wherein the covering material contains a biodegradable resin.
The method for producing a solid fertilizer according to claim 5, wherein the biodegradable resin is polylactic acid.
According to any one of claims 4 to 6, a plurality of liquid fertilizer component-containing organic substances having different amounts and / or types of the coating material are prepared, and a mixture of the plurality of liquid fertilizer component-containing organic substances is used in the step (b). The method for producing a solid fertilizer according to the description.
The method for producing a solid fertilizer according to any one of claims 1 to 7, wherein the other fertilizer material is urea.
The method for producing a solid fertilizer according to any one of claims 1 to 8, wherein the natural organic matter is wheat, rice, potato, or cellulose.
Liquid fertilizer containing 5-aminolevulinic acid, its conductor or salts thereof as a fertilizer component is mixed with natural organic matter and dried in a temperature environment of less than 150 degrees Celsius to obtain a liquid fertilizer component-containing organic matter. Method for producing organic matter.
The liquid fertilizer according to claim 10, wherein the liquid fertilizer is moistened with the sheet-shaped natural organic matter, dried in a temperature environment of less than 150 degrees Celsius, and cut or crushed into a plurality of sections to obtain the liquid fertilizer component-containing organic matter. A method for producing an organic substance containing an ingredient.
10. The liquid fertilizer component-containing organic matter is obtained by kneading the liquid fertilizer into the powdered natural organic matter into a sheet, drying it in a temperature environment of less than 150 degrees Celsius, and cutting or crushing it into a plurality of sections. The method for producing an organic substance containing a liquid fertilizer component according to.
The method for producing a liquid fertilizer component-containing organic substance according to any one of claims 10 to 12, further comprising forming a film of a coating material around the liquid fertilizer component-containing organic substance.
The method for producing a liquid fertilizer component-containing organic substance according to claim 13, wherein a plurality of liquid fertilizer component-containing organic substances having different amounts and / or types of the coating material are prepared, and the plurality of liquid fertilizer component-containing organic substances are mixed.
The method for producing a liquid fertilizer component-containing organic substance according to any one of claims 10 to 14, wherein the liquid fertilizer component-containing organic substance is processed into a rod shape.