JP2003095782A - Colored granular fertilizer and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a colored granular fertilizer which has a good or inconspicuous appearance when scattered, is environmental-friendly and is used in flowerpots, or lawns and its manufacturing method. SOLUTION: The method of manufacturing the colored granular fertilizer 1 comprises agitating the colored granular fertilizer 2 while holding its shape, supplying coloring agents 3 to the fertilizer made into a moist state in such a manner that the coloring agents 3 adheres to the surface and forming an adhered layer of the porous structure of the coloring agents 3 to the surface of the colored granular fertilizer 2. The coloring agents 3 containing a water-soluble binder solution are supplied to the fertilizer in such a manner that the coloring agents adhere to the surface and the adhered layer of the coloring agents 3 are formed on the surface of the colored granular fertilizer 2. The resultant colored granular fertilizer 1 is granular and decayable of itself.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention has a characteristic that the sprinkled state is highly aesthetic, or the presence thereof is inconspicuous and does not adversely affect the environment, and can be used for flowerpots, lawns, etc. Granular fertilizer and its manufacturing method.

[0002]

2. Description of the Related Art Attempts have been made to utilize a large amount of dehydrated cake produced in human waste treatment plants, wastewater treatment plants and the like as fertilizer. In particular, granular composts obtained by pelletizing fermented compost and drying and deodorizing it are being used. This granular compost is inferior in aesthetics, from gray that is close to black to grayish brown and ocher. In particular, when the conventional granular compost is sprinkled on the cultivated soil of a flower pot placed on a balcony or a window, or on a lawn such as a garden or a golf course, the presence of the granular compost is conspicuous.

To make a granular fertilizer whose sprinkled state is unknown or whose aesthetics are improved, for example, Japanese Patent Laid-Open No. 10-291882 is used.
No. 10, JP-A-10-025179, when coating a degradable coating on the surface of a water-soluble granular fertilizer, the coating layer is colored with a pigment or a dye, or as in JP-A-2001-181078, coloring is applied as a fertilizer. It is known to apply to the entire compact.

[0004]

[Problems to be Solved by the Invention] Japanese Patent Laid-Open No. 10-291882
When the surface of the granular fertilizer is coated with a film such as a decomposable film as in JP-A-10-025179, the fertilizer effect inside may be limited until the film is decomposed. Also,
The decomposed debris of the degradable film will be deposited on or inside the cultivated soil of the flowerpot. In addition, since the fertilizer has a film on the surface, it is glossy, and even if it is colored blue or the like and sprinkled on the inside of a lawn or the like, the presence of the fertilizer is conspicuous.

When coloring is applied to the entire fertilizer compact, the fertilizer surface is prevented from glossing and its presence becomes inconspicuous.
In order to provide sufficient coloring, a large amount of the coloring agent or dye is required at the time of formulation, and the coloring agent or dye contained therein causes environmental pollution inside the flowerpot or in the garden, golf course and the like.

[0006]

As a result of studying the above-mentioned problems, as a result of stirring the granular fertilizer while maintaining its shape, the colorant (in the present invention, generically referred to as pigment or dye) is adhered to the colorant. And a method for producing a colored granular fertilizer characterized by forming an adhering layer of a coloring agent on the surface of the granular fertilizer, whereby even if it is dull and the surroundings have the same color, it can be sprinkled in the natural world. It became possible to obtain granular fertilizer that was colored so that its presence was inconspicuous. The non-glossy state requires that the colorant layer does not reflect incident light in a certain direction but is diffusely reflected, which is why the colorant forms a smooth layer on the surface of the granular fertilizer. Try not to form. As a means therefor, it is advisable to coat (spray) the surface of the granular fertilizer with the granular or scale-like coloring agent, that is, to make it adhere.

In order to apply it to the surface of the granular fertilizer, one method is to wet the granular fertilizer and attach a powder colorant to the surface, but in order not to damage the shape of the granular fertilizer. It is advisable to apply the coloring agent in a wet state without wetting the granular fertilizer. As a result, it is possible to form an adhering layer of the coloring agent on the surface of the granular fertilizer, which diffusely reflects light. The granular fertilizer will have a surface of porous structure covered by colorant particles.

The granular fertilizer is preferably a granular compost in which the compost is granular in order to exhibit the characteristics of the present invention. Granular compost is fermented dehydrated cake, livestock waste, food waste, etc. that are produced in large quantities in facilities such as human waste treatment plants, wastewater treatment plants, livestock manure treatment plants, and food processing facilities. 2
It is preferably shaped into pellets of -15 mm, and when sprayed, it has a natural disintegrating property in which the form is impaired and disintegrated after several days or months due to water spraying or rainfall, and then disappears in the soil.

The color of the colorant is preferably blue or green in accordance with the aesthetics on the veranda or the like and lawn or other vegetation. When the granular fertilizer inside disintegrates, the coloring agent also disappears, but the coloring agent itself is more preferably photodegradable or biodegradable. As an example of a colorant, an alkaline earth metal and a copper silicate which are blue or green, which is said to have little environmental pollution, and which are introduced in Japanese Patent Publication No. 09-504771 and which are particularly suitable for coloring blue, are used. In addition to the above, as an example of other coloring agents, food dye blue No. 1 aluminum lake (Japanese Patent Laid-Open No. 08-302230) can be exemplified. Inorganic pigments such as chrome oxide green, cobalt blue and others can be used, but some are not preferable from the viewpoint of environmental pollution such as chrome, and caution is required when using them.

When the colorant particles are coated with the binder, not only the colorants can be integrated with each other, but also the colorant and the granular fertilizer inside can be bonded. The resin used as the binder between the colorants is more preferably transparent. As a biodegradable resin on the surface of these pigments, polyvinyl alcohol, lactone resin, various synthetic resins containing starch such as corn, that is, polyvinyl chloride, polystyrene, styrene-butadiene copolymer, styrene-acrylonitrile copolymer, acrylonitrile-butadiene-styrene (ABS). ) Copolymers, acrylic polymers, especially polymethylmethacrylate, polyolefins such as polyethylene, polypropylene, polybutene and polymethylpentene, cellulose derivatives such as cellulose acetate, cellulose acetobutyrate and ethylcellulose and polyamides such as polyamide 6,6.
It is possible to use a colorant obtained by coating a binder obtained by adding a biodegradable starch and a pigment to the above.

Resins that undergo photolysis can also be used.
A resin that undergoes aging phenomena such as cracking, hardening, and collapse in a short period of time when it absorbs light energy. Examples include olefin / carbon monoxide copolymers, olefin / carbon monoxide / vinyl acetate copolymers, olefin / vinyl ketone copolymers, vinylidene chloride / vinyl ketone copolymers, diene polymers, etc. Polypropylene, which is not present, and aliphatic polyester can also be cited as one of the resin materials that are easily decomposed by irradiation with ultraviolet rays.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on Examples. FIG. 1 is an enlarged perspective view of a colored granular fertilizer according to an embodiment of the present invention. FIG. 2 is an enlarged view of the AA cross section of FIG. FIG. 3 is an enlarged view of the BB cross section of FIG. FIG. 4 is a perspective view showing a state in which the colored granular fertilizer according to the embodiment of the present invention is spread on the lawn. As is clear from these figures, the colored granular fertilizer 1 of the embodiment of the present invention is one in which the coloring agent 3 is adhered and held to the surface of the granular fertilizer 2. The coloring agent is directly attached and held on the surface of the granular fertilizer 1 without coating the synthetic resin layer. An example of producing the colored granular fertilizer 1 is shown below.

Example 1 The granular fertilizer 2 is a pellet having a diameter of about 4 mm and a length of about 4 mm. The production of this granular fertilizer 2 uses dehydrated cake from a human waste treatment plant.
While extruding noodles into a noodle string using a 4.5 mm nozzle, the noodle was cut into a predetermined length (here, about 12 mm), and then fermented for 3 days in a temperature-controlled room kept at room temperature to obtain granular compost. The granular compost was dried in a dryer at about 60 ° C.

On the other hand, as a colorant, an alkaline earth metal base blue pigment was prepared, and 3% of water was added thereto to make it a wet state. 20 g of this pigment was placed in a mixer, 2 kg of the granular fertilizer was further added, and then the mixer was rotated to apply the pigment to the granular fertilizer.

By this work, the granular fertilizers as shown in FIGS. 1 to 3 were obtained, and the blue (green) pigment was well adhered to the granular fertilizers, and the colored granular fertilizers meeting the purpose of the present invention were obtained. Was obtained. The granular fertilizer 2 has a surface of a porous structure covered with particles of the coloring agent 3.

FIG. 4 shows a state in which the colored granular fertilizer of the present invention is sprinkled into the grown lawn. Since the granular fertilizer exhibits a blue color (green) and the light is diffusely reflected on the surface, the presence of the sprinkled colored granular fertilizer is not immediately known. When observing the state of colored granular fertilizer while occasionally sprinkling water for lawn management, the shape began to collapse after 15 days and 40
After a day, it became dispersed and completely collapsed. With these processes, the colorant also decomposed and disappeared. Part of the colorant may be buried in the soil, but no colorant was found in the drainage.

Example 2 3% of activated carbon was mixed with the dehydrated cake at the human waste treatment plant and fermented for 40 days. This was cut into 10 mm while extruding it into a noodle band using a 4 mm nozzle, and dried in a thermostat kept at 100 ° C. for 2 hours to obtain granular compost.

On the other hand, as a colorant, a blue pigment food dye Blue No. 1 aluminum lake was prepared, and a 10 wt% aqueous solution of polyvinyl alcohol was sprayed on the lake to make it wet, and the surface was slightly coated with polyvinyl alcohol. Put 25g of this pigment in a mixer and add 3K of the granular fertilizer.
After adding g, the operation of rotating the mixer to apply the pigment to the granular fertilizer was performed. It may be any of natural water-soluble polymers other than polyvinyl alcohol, semi-synthetic water-soluble polymers, and synthetic water-soluble polymers. As the water-soluble polymer, for example, other soluble starch, carboxymethyl starch, starch-based natural products such as dextrin, sodium alginate, gum arabic, gelatin, natural substances such as casein, cellulose derivatives such as methyl cellulose, polyvinyl methyl ether, Polyvinylpyrrolidone, vinylpyrrolidone-vinyl acetate copolymer, polyacrylamide, polyethylene glycol, polyethylene oxide, and polymers of acrylic acid, methacrylic acid or their esters or salts,
Alternatively, these copolymers and the like can be used.

When the colored granular fertilizer obtained in this example was applied to the surface of the flowerpot and used, the blue granular fertilizer increased the aesthetics of the entire flowerpot for a while, and the space where the flowerpot was placed. The effect of improving the atmosphere was obtained. When management such as water sprinkling was continued, fertilization effect appeared and the growth of ornamental plants became good. After 20 days, the colored granular fertilizer of the present invention collapsed, and after 45 days it almost disappeared. During this period, the coloring agent also disappeared, but there was no contamination by the coloring agent on the bowl stand, the pedestal or the like.

[0020]

The colored granular fertilizer of the present invention has a porous structure in which the surface of the granular fertilizer is covered with colorant particles.
There is no conventional granular fertilizer covered with degradable resin film,
The immediate effect of fertilizer effect can be obtained. In addition, the decomposed residue of the coating does not deposit on or in the cultivated soil of the flower pot. In addition, since there is no luster caused by the existing coating film on the fertilizer surface, the presence of the fertilizer does not stand out even if it is sprinkled inside the lawn such as a golf course. Since it is attached, the absolute amount of the coloring agent is small, and there is almost no environmental pollution in the flowerpot, the garden, the golf course, etc. It is easy to manufacture.

[Brief description of drawings]

FIG. 1 is an enlarged perspective view of a colored granular fertilizer according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged view taken along the line BB of FIG.

FIG. 4 is a perspective view showing a state in which the colored granular fertilizer according to the embodiment of the present invention is sprinkled on the lawn.

[Explanation of symbols]

1 colored granular fertilizer 2 granular fertilizer 3 colorants

Claims (11)

[Claims] 1. A colored granular fertilizer comprising a coloring agent adhered to and retained on the surface of the granular fertilizer. 2. A colored granular fertilizer in which a coloring agent is adhered and held on the surface of the granular fertilizer without interposing a synthetic resin layer coated thereon. 3. The colored granular fertilizer according to claim 1, wherein the granular fertilizer is granular compost and is naturally disintegrating. 4. The colored granular fertilizer according to claim 1, wherein the color of the coloring agent is blue or green. 5. The colored granular fertilizer according to claim 1, wherein the coloring agent is coated with a water-soluble, photodegradable or biodegradable resin. 6. The granular fertilizer is stirred while maintaining its shape, and the colorant is supplied so that the colorant adheres to the surface,
A method for producing a colored granular fertilizer, which comprises forming an adhesion layer having a porous structure of a coloring agent on the surface of the granular fertilizer. 7. An adhering layer having a porous structure of a coloring agent is provided on the surface of the granular fertilizer by stirring the granular fertilizer while maintaining its shape and supplying the coloring agent in a wet state so that the coloring agent adheres to the surface. A method for producing a colored granular fertilizer, which comprises: 8. A method of stirring a granular fertilizer while maintaining its shape, supplying the coloring agent containing a water-soluble binder solution so that the coloring agent adheres to the surface, and adhering the coloring agent to the surface of the granular fertilizer. A method for producing a colored granular fertilizer, which comprises forming a layer. 9. The method for producing a colored granular fertilizer according to claim 6, wherein the granular fertilizer is granular compost and is naturally disintegrating. 10. The method for producing a colored granular fertilizer according to claim 6, wherein the color of the colorant is blue or green. 11. The method for producing a colored granular fertilizer according to claim 6, wherein the colorant is coated with a water-soluble, photodegradable or biodegradable resin.