WO2019181715A1

WO2019181715A1 - Method of manufacturing granular mixed solid fertilizer incorporating liquid fertilizer component-containing grain pellets

Info

Publication number: WO2019181715A1
Application number: PCT/JP2019/010481
Authority: WO
Inventors: 雅哉齋藤
Original assignee: 雅哉齋藤
Priority date: 2018-03-19
Filing date: 2019-03-14
Publication date: 2019-09-26
Also published as: JP6491380B1; JP2019163179A

Abstract

The present invention relates to a technique of manufacturing a liquid fertilizer component-containing mixed solid fertilizer which is suitable for mass production in a large-scale plant by a method of mixing grain pellets into a solid fertilizer raw material, the grain pellets being obtained by causing a liquid fertilizer component to be absorbed by cereal grains by a cooking process. The present invention provides a method of manufacturing a granular mixed solid fertilizer which includes adding a liquid fertilizer that contains a fertilizer component to cereal grains such as threshed and dried rice instead of water when cooking, cooking the cereal grains so that the liquid fertilizer component is absorbed by the cereal grains, then drying the same to obtain liquid fertilizer component-containing grain pellets, coating the grain pellets, as they are or by cutting or crushing the same as desired, with a coating material such as a biodegradable resin solution, mixing the same with other solid fertilizer materials, and granulating the same.

Description

Manufacturing method of granular mixed solid fertilizer mixed with liquid fertilizer component-containing grain pellets

The present invention is obtained by absorbing a liquid fertilizer component of a fertilizer, such as 5-aminolevulinic acid, a derivative thereof or a salt thereof (hereinafter collectively referred to as “ALA”), which is usually in a liquid fertilizer state, into a grain by a rice cooking process. The present invention relates to a technique for producing a mixed solid fertilizer containing liquid fertilizer components suitable for mass production in a large-scale plant, by drying grain pellets or sections thereof and mixing them with solid fertilizer raw materials.

Liquid fertilizers, especially amino acid fertilizers, are attracting attention as fertilizers with little soil degradation. However, among them, ALA has excellent effects such as photosynthetic activity improvement and growth promotion. The utility value as an agent is high, and the technique described in Patent Document 1 has already obtained a patent for its use.

However, spraying liquid fertilizer takes more time than solid fertilizer, but it is less convenient than solid fertilizer, as liquid fertilizer components are rapidly released in the application environment and must be sprayed frequently. But there was. Therefore, as a method of applying solid fertilizer containing ALA, which is liquid fertilizer, ALA is directly dropped, sprayed or mixed with other solid fertilizer raw materials, or crystallized ALA is used as another solid fertilizer raw material. Techniques for directly mixing and providing are devised as described in Patent Document 2, Patent Document 3, and Patent Document 4, and patents have already been obtained.

JP 04-338305 A International Publication No. 2012/043470 JP 2013-209241 A JP 2014-189469 A Japanese Patent Laid-Open No. 11-158010

The technology described in Patent Document 1 is a basic patent on the use of ALA for fertilizer itself, but it is specific about how ALA is widely provided to the world as a fertilizer. There is no description regarding a method, in particular, a technique for providing ALA, which is usually in a liquid fertilizer state, 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 improving the storage stability of ALA and providing it in a solid fertilizer, but all of them are compatible with mass production as described later. It is not sufficient, especially for the purpose of producing solid fertilizers containing ALA in large-scale fertilizer manufacturing plants that have a production capacity of several hundred to several thousand tons per day. There was a problem that there was.

The present invention, as described below, is basically related to a technique for providing liquid fertilizer components mixed with solid fertilizer to improve convenience during application, but particularly destabilized under certain conditions. Or, further improve the storage stability of ALA that decomposes, secure the slow release of ALA over a longer period, and eliminate the obstruction factors of the techniques described in Patent Documents 2 to 4 By doing so, it is characterized by including a technology that enables mass production of ALA-containing solid fertilizer even in a large-scale fertilizer manufacturing plant or the like.

For example, in patent document 4, the solid fertilizer characterized by containing ALA and fats and oils substantially uniformly in solid fertilizer, and mixing so that ALA and fats and oils may become substantially uniform There is description about the manufacturing method of the said solid fertilizer characterized by these. In addition, in Patent Document 4, the addition of fats and oils has a remarkable effect on improving the stability of ALA, and particularly when the fat and oil components and ALA are contained substantially uniformly in the solid fertilizer. Definition of a mixed state that a high stabilizing effect can be obtained, substantially uniform means a state where the ALA component and the fat and oil component are mixed so as to be uniformly distributed, and the solid fertilizer of the invention Can be manufactured by adding and mixing oils and fats to ALA, or by adding and mixing ALA to oils and fats. The method for adding oils and fats is solid or There are descriptions such as a method of adding a semi-solid to an appropriate size, a method of dropping a liquid, and the like.

The problem of the technique described in Patent Document 4 is in common with the problem of the present invention in providing a solid fertilizer with improved ALA storage stability. However, as a general technical common sense, the present invention is a method in which cereal grains, which are not solid fertilizer raw materials, absorb ALA ingredients in rice and dry it to reduce water activity, and optionally coat and re-dry it. Is a technique for improving the storage stability of ALA by holding it in the grain of the grains, while the technique described in Patent Document 4 is directly applied so that ALA and the fats and oils as subcomponents are contained substantially uniformly. 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 mixing with ALA.

In addition, regarding the method of mixing ALA and other solid fertilizer raw materials, the technique of the present invention does not require that the ALA-containing cereal pellets or their slices and other solid fertilizer raw materials are contained uniformly, for example, cereal pellets or their slices. The solid fertilizer may be concentrated on the surface of the solid fertilizer, or may be concentrated in the center, and further, the grain pellet alone can be used as the solid fertilizer without mixing with other solid fertilizer raw materials. On the other hand, the technology described in Patent Document 4 is fundamentally different in technical idea in that the necessity of mixing and molding ALA and fats and oils which are subcomponents to be substantially uniform is shown. For example, when mass production of solid fertilizer containing ALA in a large solid fertilizer manufacturing plant by applying the technology described in Patent Document 4, ALA and the manufacturing process established under the optimal design It is necessary to add special equipment and processes for mixing and molding the fats and oils so as to be substantially uniform at a large cost, which is a great hindrance in terms of economy.

Furthermore, in general, large-scale fertilizer production plants require periodic repairs at regular intervals of equipment, but in accordance with the technology described in Patent Document 4, a considerable amount of oil and fat components are mixed in addition to the solid fertilizer raw material that is the technical premise of the production process. If this happens, the scale will contain oil and fat on the inner surface of the equipment, resulting in adverse effects such as an increase in the amount of scale removal work during regular repairs and a prolonged repair period. Become.

Patent Document 3 claims include a step of spray-adding a solid fertilizer containing ALA, bone meal and citric acid, and a solution containing ALA to a solid fertilizer raw material containing bone meal and citric acid, and a forming step. There is description about the manufacturing method of the solid fertilizer containing. In addition, Patent Document 3 describes that a mixture of fertilizer raw materials containing bone meal and citric acid can be obtained by blending citric acid without impairing moldability and obtaining long-term storage stability of ALA. A method for producing a solid fertilizer in which an ALA solution is sprayed and granulated, a production method in which an ALA solution is sprayed and added to a pre-granulated mixture of bone meal and fertilizer raw material containing citric acid, and bone powder and citric acid and ALA crystals are mixed. There is a description of a method for producing solid fertilizer.

The purpose of the technique described in Patent Document 3 is in common with the object of the present invention in that it is intended to provide a solid fertilizer containing ALA in order to easily apply ALA with a small number of applications. However, according to the present invention, as a general technical common sense, ALA components are cooked and absorbed in grains that are not solid fertilizer raw materials, and dried to reduce water activity. As a solid fertilizer that can be easily applied by holding ALA in a grain by a method, or by mixing a grain or slice thereof containing ALA with other solid fertilizer raw materials to form a granular solid fertilizer On the other hand, in the technique described in Patent Document 3, ALA is directly sprayed on a solid fertilizer raw material containing bone meal and citric acid, which are accessory components, and adhered to the surface, or directly mixed. The technical idea for the solidification method is fundamentally different in that it provides a solid fertilizer containing an ALA component.

When mass-producing solid fertilizers containing ALA using an existing large solid fertilizer manufacturing plant, the large solid fertilizer manufacturing plant is usually based on the technical premise of the manufacturing process in order to maximize its capacity. When a solid fertilizer raw material component is specified in advance and optimally designed, when a considerable amount of raw material components other than the technical premise of the manufacturing plant, such as citric acid and bone powder, are added according to the technology described in Patent Document 3. This is the same as in the case of the technique described in Patent Document 4 in that special equipment and processes need to be added at a large expense, which is a major obstacle in terms of economy.

In general, large-scale fertilizer manufacturing plants require regular repairs at regular intervals of equipment, but in accordance with the technology described in Patent Document 3, citric acid and bone meal components other than solid fertilizer raw materials that are the technical premise of the manufacturing process are substantial. If they are mixed, they will adhere 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 prolonged repair period, which will be a major impediment from the economic aspect. This is the same as in the case of the technique described in Patent Document 4.

In addition, the patent document 2 claims include a solid fertilizer containing ALA and a raw material for fertilizer 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 description about the manufacturing method of the said solid fertilizer including the process of spray-adding the solution containing ALA to a raw material, and the process of drying. In addition, in Patent Document 2, the production method of the solid fertilizer in which the ALA solution is sprayed and adhered while rolling the solid fertilizer raw material, the ALA solution is added to the solid fertilizer raw material in advance, and then mixed and granulated. There are descriptions of a production method, a production method in which an ALA solution is sprayed and added to the granulated solid fertilizer raw material, and the like. In addition, in Patent Document 2, the ALA having the property of destabilizing when the pH value is increased is mixed with an acidic fertilizer raw material such as ammonium nitrate or ammonium sulfate or phosphoric acid. An effect of stably storing the fertilizer inside, a method of covering the solid fertilizer with a coating material such as paraffin wax in order to make the effect of ALA contained in the solid fertilizer more sustainable have been suggested.

The purpose of the technique described in Patent Document 2 is in common with the object of the present invention in that it is intended to provide a solid fertilizer containing ALA so that ALA can be easily applied with a small number of applications. However, as a general technical common sense, the present invention is a method in which cereal grains, which are not solid fertilizer raw materials, absorb ALA ingredients in rice and dry it to reduce water activity, and in some cases, coat and re-dry it. In order to provide ALA as a solid fertilizer that can be easily applied by holding it in the grain pellets or by mixing the grain containing the ALA with other solid fertilizer raw materials to form a granular solid fertilizer On the other hand, in the technique described in Patent Document 2, ALA is directly spray-added to a solid fertilizer raw material containing either ammonium nitrate or ammonium sulfate as a secondary component or phosphoric acid, and adhered to the surface, or mixed directly. The technical idea for the solidification method is fundamentally different in that it provides a solid fertilizer containing an ALA component.

In addition, 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 technology of the present invention can be applied as a solid fertilizer even with a single grain pellet that absorbs rice from ALA. In addition, if necessary, the grain pellets can be mixed with any other solid fertilizer raw material if it is coated with a coating material that is non-invasive to other solid fertilizer raw materials to be mixed. The technology described in Document 2 is fundamentally different from the technical idea of mixing in that it requires various conditional constraints on the components and composition of other solid fertilizer raw materials to be mixed with ALA.

For example, when trying to apply the technology described in Patent Document 2 to mass production of solid urea fertilizer particularly in a large fertilizer plant, it was optimized and established for the purpose of synthesizing and granulating ammonia and urea from a hydrogen raw material. In the course of a series of manufacturing processes, it is necessary to add a substantial amount of either ammonium nitrate or ammonium sulfate, or phosphoric acid, to dry, and optionally to cover. In this case, a large-scale urea fertilizer plant generally has a production capacity of several hundred to several thousand tons per day, so the processes that require additional steps such as mixing of secondary materials, stirring, drying, and coating are basically It must be installed in the same factory premises with the same or higher processing capacity as the previous and subsequent processes. Because, if the processing capacity of these additional processes is lower than the processing capacity of the preceding and following processes, or if they are geographically separated, the processing amount of the part is small, This is because the temperature change of the raw material in process becomes a bottleneck of the entire production capacity of the entire equipment, that is, an obstruction factor. Given the general construction costs of plant-related equipment, the additional investment needed to eliminate these bottlenecks will reduce the price competitiveness of the fertilizer products produced, and the products will be tricked from the market. Risk. Therefore, it is considered that it is very difficult to remove this obstructive factor mainly from the economical aspect.

On the other hand, when the technology of the present invention is applied to the mixing of ALA and urea, the characteristic of rice having a general specific gravity in the range of 1.2 to 1.4 is utilized, and this is contained in ALA. As a material of grain pellets, by adding simple adjustments such as the degree of drying, material selection of coating materials and the number of times of coating, the specific gravity of the grain pellets after coating is closer to 1.3, which is equivalent to the specific gravity of solid urea It is desirable to manufacture. This is because when grain pellets are put into the urea fertilizer granulation process, the grain pellets are less likely to settle or float on the surface if the specific gravity of the grain pellets is closer to that of solid urea. This is because mixing can be performed with even more uniformity. Further, when the grain pellet is cut or crushed into a plurality of sections and further subdivided, it becomes easier to mix uniformly. Note that cutting or crushing into sections may be performed before, during or after drying of the grain pellets. Incidentally, the production of such grain pellets or sections thereof need not be carried out in the vicinity of the fertilizer production plant, but can be produced in large quantities and efficiently in advance and stored in large quantities. That is, by applying the technology of the present invention, in the existing granulation process of a large urea fertilizer plant, a necessary amount of grain pellets or their slices produced efficiently and in large quantities elsewhere are introduced at appropriate times. It is possible to produce a large amount of mixed solid urea fertilizer mixed with ALA-containing cereal pellets or sections thereof without any hindrance to the facility production capacity of the large urea fertilizer plant.

Patent Document 2 suggests a method of coating a solid fertilizer to which ALA has been added or mixed with a coating material such as paraffin wax in order to control the sustained release of ALA in order to increase the sustainability of the effect as a fertilizer. However, this appears to be similar to the technique of the present invention for coating ALA-containing grain pellets or sections thereof. However, while the technique described in Patent Document 2 is a method of covering the whole granulated solid fertilizer itself containing ALA, in the technique of the present invention, only the cereal pellets or their slices after the ALA is cooked and absorbed. The technical ideas of both of the objects and methods of coating are fundamentally different in that they are objects to be coated, and even when mixed with other solid fertilizer raw materials, it is not necessary to cover the solid fertilizer itself.

According to the technique described in Patent Document 2, the coated solid fertilizer is more slowly decomposed in the applied soil, and the controlled release of ALA is controlled through its slowness. Since the coated solid fertilizer made of the same material is decomposed almost at the same time in the same soil environment, the release of ALA is also started at the same time. On the other hand, if the technology of the present invention is applied and applied to a coating material having a different decomposition rate or ALA-containing cereal pellets coated with a different number of coatings, or a combination thereof, or mixed with other mixed solid fertilizer raw materials, the same In this soil environment, the release of ALA can be prevented from occurring at the same time, and the slow release of the release can be maintained for a longer period of time. In light of the object of the present invention to maintain the slow release of ALA over a longer period of time, the technique of Patent Document 2 that covers the entire solid fertilizer itself after granulation has an inhibiting factor.

In addition, when the coating technique described in Patent Document 2 is applied to solid fertilizers containing urea as a main component, two additional inhibiting factors arise.

That is, the first point is that urea is a fertilizer that is normally used with the expectation of its immediate effect. However, when the solid urea fertilizer itself is coated with wax or the like by the technique described in Patent Document 2, the urea component Release is not performed until the coating is completely decomposed and peeled off, which is an impediment to the immediate effect of urea fertilizer.

The second point is that ammonium carbonate is temporarily generated in the process of hydrolysis of urea in the soil environment, and the pH of the soil is temporarily adjusted for a certain period of time by the action of ammonium ions dissolved in the moisture of the soil. This is due to the known fact that the probability of increasing is high. That is, even if the solid urea fertilizer itself is coated according to the technique described in Patent Document 2, the situation in which the release of urea and ALA is performed simultaneously does not change, so the pH of the soil by ammonium ions is almost the same as the release of ALA. This means that there is a high probability that an increase will occur and ALA will become unstable. When this point provides the solid urea fertilizer containing ALA using the technique of patent document 2, it will become a big obstruction factor on utilization.

The technology of the present invention provides an effective solution to these two obstruction factors when the technology described in Patent Document 2 is applied to the production of solid urea fertilizer. The solution to the first obstruction factor is that the technique of the present invention does not require coating the solid urea fertilizer itself, so that it does not impede the immediate effect of urea at all. The solution to the second obstruction factor is the generation of ammonium carbonate when ALA is released into the application environment when applying the technology of the present invention to coat ALA-containing grain pellets or their slices. On the other hand, it is possible to realize temporal control of delaying. This is because during the general period from the application of solid urea fertilizer to the generation and decomposition of ammonium carbonate, that is, the period during which there is a high probability that the pH of the soil will rise, the soil properties, seasonal humidity, and temperature in the application area are generally high. Since it can be estimated according to the situation and can be specified as several to several tens of patterns, the design conditions for the coating processing of the grain pellet or its section should be set so that ALA is not released during that period. If specified and coated in advance, the solid urea fertilizer can be provided with a delayed release function so that ALA is released to the application environment after the influence of pH increase due to ammonium carbonate is eliminated. Large urea fertilizer plants are often constructed in the vicinity of consuming places such as developing countries and regions with a large population, that is, in the vicinity of the application target country or region, but if the technology described in the present invention is applied, the application target country Alternatively, it is possible to produce an ALA-containing solid urea fertilizer having a delayed release function that is highly compatible with the local climate and soil environment.

In addition, although patent document 1 specification has the suggestion about the point that ALA can be used as a soil treatment agent even if it mixes with any other fertilizer etc., unless it loses the effect of ALA. The problem recognition behind this is in common with the present invention. In other words, if urea and ALA are mixed and applied as they are, the ammonium ions that can be generated in the process of decomposition of urea raise the pH of the soil, and the probability that ALA in the soil is degraded and the effect of ALA is lost. When the urea is in a high temperature state, particularly in a molten state inside the fertilizer production plant, even if the temperature is lower than the decomposition temperature of ALA, a trace amount of ammonia derived from urea Since ALA is decomposed by the action, it is a combination that cannot be directly mixed. That is, urea is a solid fertilizer raw material that is applied to soil simultaneously with ALA, or a solid fertilizer raw material directly mixed with ALA in a fertilizer manufacturing plant. In other words, the provision of ALA and urea in combination has been an inhibiting factor for effective use of ALA.

In this respect, according to the present invention, fertilizers and grain handlers that, based on the present invention, ALA is cooked in a grain pellet or a slice thereof, coated with a coating with delayed release after being dried, and then mixed with urea. However, by using a novel method that cannot normally be conceived, it is possible to realize an ALA-containing mixed solid urea fertilizer that can be easily applied without impairing the effectiveness of ALA during production or use. Needless to say, Patent Documents 1 to 5 have no description or suggestion regarding such technical features of the present invention.

Incidentally, the technique described in Patent Document 5 is a technique for improving the effect of a foliage treatment agent that adheres directly to the leaves and stems of plants using ALA. The purpose of the technology of the present invention is completely different.

For the purpose of making it easy to use liquid fertilizer components such as ALA as solid fertilizers, the technology of the present invention absorbs the liquid fertilizer components into grains that are not solid fertilizer raw materials as a general technical common sense, In order to reduce the activity, this is dried and optionally coated, or the grain is mixed with other solid fertilizer raw materials to form a granular solid fertilizer. It includes difficult ideas, and by these ideas, slow release of liquid fertilizer components over a longer period, mixing of ALA and high-temperature urea, which were technically related to inhibition, and delayed elimination of ALA Realize progressive effects that are not included in conventional technical knowledge, such as preventing the degradation of ALA in the application environment by ensuring release. These ideas and the effects thereof cannot be easily conceived even if those skilled in the art add ordinary technical common knowledge to the techniques described in Patent Documents 1 to 5. The relationship between the techniques of Patent Documents 1 to 4 and the techniques of Patent Documents 2, 3, and 4 is intended to increase the storage stability of ALA and provide a solid fertilizer that can be easily applied. Although the relationship between the technology 1 and the technology of the present invention is similar and similar, the inventiveness of the technology of the present invention over the current common sense is that of Patent Documents 2, 3, and 4 that have already been patented. Technology is in no way inferior to the inventive step it would have had against the common general knowledge at the time that it was filed.

In the first aspect of the present invention, liquid fertilizer containing ALA as a fertilizer component is added to cereal grains such as threshed and dried rice instead of water during cooking, and the inner surface of the apparatus is kept at a contact temperature of less than 150 degrees Celsius. The ALA liquid fertilizer component-containing cereal pellets obtained as a result of cooking and absorbing the ALA liquid fertilizer component by cooking with a saucer rice cooker are separated into individual grain grains while drying in a temperature environment of less than 150 degrees Celsius, pH 7 It is coated with a coating material such as a biodegradable resin solution such as polylactic acid whose pH is adjusted to 0 or less, dried again in a temperature environment of less than 150 degrees Celsius, and then in a contact temperature environment of less than 150 degrees Celsius. It is characterized in that it is granulated in the state of mixing ALA liquid fertilizer component-containing grain pellets by mixing it into the raw material of solid fertilizer in the production process of granular solid fertilizer such as retained large urea fertilizer That is a method for producing a granular mixture solid fertilizers.

In addition, the second form of the present invention is the addition of liquid fertilizer containing ALA as a fertilizer component to grains such as threshed and dried rice instead of water during cooking, and the device inner surface has a contact temperature of less than 150 degrees Celsius. The ALA liquid fertilizer component-containing cereal pellets obtained by cooking with a rice cooker kept at a temperature are separated into individual grain grains while drying in a temperature environment of less than 150 degrees Celsius. After being cut or crushed into a plurality of sections, coated with a coating material such as a biodegradable resin solution such as polylactic acid adjusted to pH 7.0 or lower, and dried again in a temperature environment of less than 150 degrees Celsius. In the production process of granular solid fertilizer such as large-scale urea fertilizer kept in a contact temperature environment of less than 150 degrees Celsius, by mixing into the solid fertilizer raw material, grain pellet cutting containing ALA liquid fertilizer component Characterized in that the granulation while mixing, a method for producing a granular mixture solid fertilizers. That is, in the first aspect, the method is a method for producing a granular mixed solid fertilizer that is cut or crushed into a plurality of sections before the ALA liquid fertilizer component-containing grain pellet is coated with the coating material. The liquid fertilizer component-containing cereal pellet is cut or crushed into a plurality of sections and further subdivided to further facilitate uniform mixing. In addition, cutting or crushing into sections may be performed after the ALA liquid fertilizer component-containing cereal pellets are obtained and before being coated with the coating material, either before or during drying of the ALA liquid fertilizer component-containing cereal pellets, It does not matter even after drying.

The third aspect of the present invention is a method for producing a granular mixed solid fertilizer in which the granular solid fertilizer such as the large urea fertilizer in the first aspect or the second aspect is a solid urea fertilizer.

In the present invention, the reason why liquid ingredients such as ALA are cooked and absorbed in grains such as rice that has been threshed and dried is generally that grains such as rice are absorbed as they are when liquid ingredients are absorbed and processed into grain pellets. This is because there is no particular obstacle to spraying, and it naturally has a shape and size suitable for use as a mixed solid fertilizer mixed with a solid fertilizer raw material. Also, until the rice is cooked, that is, by adding water and heating, the starch in the grain is gelatinized, and amylose and amylopectin are eluted in the surroundings, and are absorbed into the grain again while holding moisture until cooking is completed There is also a reason that the liquid fertilizer component is effectively absorbed not only into the surface layer of the grain but also into the inside. Explaining this effect by quoting the relative proportions of mixed rice and cooked rice using rice, cooked rice that cooks with soup stock is better than mixed rice that adds umami ingredients after cooking. It is the same as the effect | action which can penetrate | invade umami components, such as an amino acid, to the inside of rice.

In addition, the reason for using the rice cooker in which the inner surface of the rice cooker is maintained at a contact temperature of less than 150 degrees Celsius in the present invention is that the decomposition temperature of the ALA component is 151 degrees in the public information and about 0.5 degrees lower than that in the measurement example This is because there is a high possibility that ALA decomposes at a temperature of 150 degrees Celsius or higher and loses its characteristics. Similarly, in order to avoid decomposition of the ALA component, the temperature environment of the warm air when performing the warm air drying and the contact temperature environment in the manufacturing apparatus in the process of mixing with the solid fertilizer raw material such as urea is 150 degrees Celsius. It needs to be kept below a degree. Note that the melting point temperature of urea at normal pressure is 133 degrees Celsius, and depending on the position in the manufacturing apparatus such as a fertilizer plant, the temperature of molten urea may exceed 150 degrees Celsius. There is no practical problem as long as the temperature of urea after the section mixing step and the contact temperature environment of the manufacturing facility with which the urea comes in contact are kept below 150 degrees Celsius below the decomposition temperature of ALA.

In the present invention, the pH of the liquid coating material is adjusted to 7.0 or less because ALA has the property of destabilizing when placed in an alkaline environment of pH 7.0 or more. This is because if the pH of the glass exceeds 7.0 and is inclined to be alkaline, ALA may be decomposed during the coating process.

In the present invention, the reason why the grain pellets obtained by absorbing and absorbing liquid fertilizer components such as ALA in the present invention are dried once without being coated is primarily because of the water activity of the grain pellets, and generally the propagation of bacteria and molds over a long period of time. This is because it can be prevented to about 0.7 to 0.5 or less. Thereby, the preservability of a grain pellet or its slice | lottery, and the liquid fertilizer component absorbed by cooking in it improves dramatically. In addition, in order to uniformly coat the cereal pellets or slices thereof used in the first aspect of the present invention, and to properly mix the coated cereal pellets or slices thereof with the solid fertilizer raw material, this It is more desirable to dry the grain pellets once at a stage and break each grain into an independent state. If desired, the grain pellet is also cut or crushed into a plurality of pieces, and it is also desirable to dry before coating.

In addition, in the present invention, on the premise that the solid urea fertilizer is put into the granulation step later, particularly when ALA-containing cereal pellets are produced using polished rice, the general specific gravity of polished rice is generally 1.2 to 1. Therefore, by drying once at this stage, the specific gravity of the coated grain pellet or its slice is adjusted to 1.3, which is equivalent to the specific gravity of urea. There is also an effect that it becomes easy to manufacture so that it becomes back and forth. If the specific gravity of the coated grain pellet or its slice is about 1.3, which is approximately the same as the specific gravity of solid urea, the precipitation of the grain pellet or its slice when it is put into the granulation process, the surface layer part The grain pellets or the slices thereof are more easily mixed with the solid fertilizer raw material more uniformly.

In addition, in the present invention, the ALA-containing cereal pellets are coated and re-dried in order to prevent the urea in the high temperature state from infiltrating the cereal pellets and coming into contact with the ALA when mixed with the urea fertilizer raw material. This is because although urea fertilizers are classified as neutral fertilizers, the pH of high-temperature urea, particularly urea in a molten state in the production equipment, is 7.0 to 8.0, and is slightly inclined to alkalinity. This is because there is a high possibility that ALA becomes unstable and decomposes due to contact with. In addition, urea produces ammonia although it is traced when heated, and when it infiltrates into a grain pellet, it reacts with ALA and decomposes ALA. In addition, urea functions as a catalyst in a high temperature environment, and there is a possibility that the chemical reaction of a substance having a carbonyl group such as ALA may be promoted. In view of these problems, covering grain pellets to protect ALA from the infiltration and contact of urea and urea-derived ammonia greatly contributes to increasing the storage stability of ALA during the manufacturing process.

The grain pellets containing the liquid fertilizer component used in the present invention may be damaged by animals such as birds when exposed to the ground surface after application. It may be colored, or it may be seasoned or flavored with stimulating seasoning ingredients such as capsaicin, other flavoring ingredients, or a repellent to prevent food damage by animals. These coloring, flavoring, flavoring and other processing may be a method of previously mixing components necessary for liquid fertilizer to be added when cooking cereal pellets, or mixing those components into the coating material, The method of making it adhere may be sufficient. In addition, it is possible to reduce the possibility of being damaged by cutting and crushing into a plurality of smaller sections.

In the present invention, a neutralizing agent for neutralizing trace components such as iron, which improve the effect of fertilizer by being released into the application environment simultaneously with liquid fertilizer components such as ALA, or acid or alkaline components of soil It is also possible to add the ingredients in advance to the liquid fertilizer to be added during the rice cooking process of the cereal pellets and to absorb the cooked rice in the cereal pellets.

It should be noted that the liquid fertilizer component-containing cereal pellets or sections thereof used in the present invention are not subject to geographical restrictions such as the application target country or region and the distance from the fertilizer manufacturing equipment, and are most economical in the optimal location and using the optimal production equipment. It is possible to manufacture efficiently and with stable quality. Due to this feature, the production of fertilizer using the technology of the present invention can be stably maintained with economic rationality.

By using the technique of the present invention, the fertilizer provided as a normal liquid fertilizer such as ALA is excellent in storage stability and stable as a solid fertilizer that is simple to apply or as a solid fertilizer mixed with other solid fertilizer raw materials. It can be manufactured and provided economically with quality, which is convenient for both fertilizer producers and agricultural producers.

By using the technology of the present invention, a solid urea fertilizer mixed with ALA while realizing long-term storage stability and slow release of ALA that is unstable or easily degraded by pH and temperature. Since it can be manufactured in large quantities using known manufacturing techniques, it is convenient for both fertilizer producers and agricultural producers.

Even when the technology of the present invention is applied to the production of solid fertilizer containing liquid fertilizer components of fertilizers usually provided as liquid fertilizer such as ALA, it is only necessary to add liquid fertilizer component-containing grain pellets or slices thereof as one of the feedstocks, There is no need to add additional equipment with a large investment to the existing large-scale fertilizer manufacturing plant, which is convenient for fertilizer producers.

The raw material for liquid fertilizer component-containing cereal pellets or sections thereof used in the present invention can be used for edible cereals such as low-quality rice or rice that has passed its expiration date. high.

It is a front sectional view of a liquid fertilizer component containing mixed solid fertilizer manufactured based on the first embodiment of the present invention. It is a front sectional view of the liquid fertilizer component containing mixed solid fertilizer manufactured based on the second embodiment of the present invention.

DESCRIPTION OF SYMBOLS 101 Granulated solid fertilizer raw material 102 Liquid fertilizer component containing grain pellet 103 Coating by coating 201 Granulated solid fertilizer raw material 202 Cut or crushed liquid fertilizer component containing grain pellet slice 203 Coating by coating

Claims

In cereal grains such as rice that has been threshed and dried, liquid fertilizer containing 5-aminolevulinic acid, its cocoon conductor or a salt thereof (hereinafter collectively referred to as “ALA”) as a fertilizer component is used instead of water during cooking. In addition, the ALA liquid fertilizer component-containing cereal pellets obtained as a state where the ALA liquid fertilizer component is cooked and absorbed by cooking with a rice cooker whose inner surface is maintained at a contact temperature of less than 150 degrees Celsius, is a temperature environment of less than 150 degrees Celsius And dried with a coating material such as a biodegradable resin solution such as polylactic acid adjusted to pH 7.0 or lower and dried again in a temperature environment of less than 150 degrees Celsius, and less than 150 degrees Celsius In the production process of granular solid fertilizer such as large-scale urea fertilizer kept under the contact temperature environment of ALA, mixed with ALA liquid fertilizer component-containing cereal pellets by mixing with solid fertilizer raw material And wherein the obtaining the granulated particulate mixture solid fertilizers, method for producing the granular mixture solid fertilizers.
The method for producing a granular mixed solid fertilizer according to claim 1, wherein the ALA liquid fertilizer component-containing grain pellet is cut or crushed into a plurality of sections before being coated with the coating material.
The method for producing a granular mixed solid fertilizer according to claim 1 or 2, wherein the granular solid fertilizer such as a large urea fertilizer is a solid urea fertilizer.