JP2007306844A - Method for producing greening material using waste material, and greening material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide greening material obtained by utilizing waste material as raw material, excellent in soil function and fertilizer function, and having no problem in safety. <P>SOLUTION: The greening material is obtained through adding water and acidic liquid to waste material to subject the mixture to acid treatment at pH 3 or less, performing solid-liquid separation of the mixture to obtain a cake, adding water to the cake, repeating cleaning treatment and solid-liquid separation until cleaning water has pH 4-7.5. and drying the obtained cleaned cake to produce greening material where eluate has pH 4-7.5, electrical conductivity (EC) is ≤2 ms/cm, cation exchange capacity is 15 meq/100 g or more, and the content of soluble hydrate silica is 0.2-14 wt.%. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for producing a greening material using waste and a greening material, and more particularly to a greening material that uses waste as a raw material, has excellent soil function and fertilizer function, and has high safety.

  Conventionally, after adding an additive as needed, waste is subjected to treatments such as mixing, stirring, granulation, crushing, drying, and firing, and is used as soil or culture soil. As such a conventional technique, for example, a technique for drying purified water sludge and adding phosphoric acid after adjusting the particle size to make culture soil (Patent Document 1), a technique for mixing waste soil and humus soil to make culture soil (Patent Document 2) , Sewage sludge, etc., carbonized carbonized, then added enzymes and minerals, fermented to make soil (Patent Document 3), ALC carbonated to soil and culture soil (Patent Document 4), inorganic such as clay A technique (Patent Document 5) or the like is known in which waste casting sand or the like is solidified into particles using a powder and a binder prepared from a polymer to form soil or cultivated soil.

However, the soil and culture medium obtained by the above-mentioned conventional technique have a pH and conductivity (EC) of the eluate that are favorable for plant growth (pH = 5.5 to 7.5, EC = 2.0 ms / cm). This may cause a problem. Moreover, in addition to the problem of low fertilizer effectiveness because only one or two fertilizer components are provided, there are also problems with soil properties such as fertilizer, phosphate absorption coefficient, water permeability, water retention and bactericidal properties. is there. Furthermore, it does not have a function as cultivated soil that requires both the above-mentioned fertilization effect and soil characteristics. In addition, there is a problem in safety such as elution of heavy metals, and a mixture of materials having different specific gravity and the like has a problem that material separation occurs during handling and a uniform effect is not exhibited.
JP 2004-329023 A JP-A-2005-27615 JP-A-10-70938 JP 06-141671 A JP 07-224280

  The present invention has been made in order to solve such problems of the prior art, and the object of the present invention is to dispose of wastes that are inferior in fertilization efficiency and soil properties and have safety problems with fertilizer. It is providing the manufacturing method of the greening material for using as a greening material excellent in effectiveness, soil characteristics, and safety, and its greening material.

  The method for producing a greening material using the waste according to the present invention includes adding water and an acidic liquid to the waste, performing an acid treatment at a pH of 3 or less, and performing solid-liquid separation to obtain a cake. The washing cake is dried by repeating washing treatment and solid-liquid separation until the washing water has a pH in the range of 4 to 7.5 and then drying the washing cake.

  In addition to the above, the cleaning cake can be further dried after adding and mixing a fertilizer component, a soil component, a binder component, and a component selected from any combination thereof.

  Among the functions as a greening material, the necessary functions as soil are excellent in water permeability, water retention, fertilizer retention, small phosphate absorption coefficient, pH of eluate 5.5-7.5, conductivity It is 2.0 ms / cm or less and is excellent in safety.

  Among the above, the characteristics of the eluate, phosphate absorption coefficient, fertilizer retention and safety are achieved by treatment at pH 3 or lower with an acidic solution. That is, by treatment at pH 3 or lower, alkali metals, alkaline earth metals and the like are eluted and removed, and as a result, the eluate characteristics and phosphate absorption coefficient are improved. In addition, the treatment with the acidic liquid destroys the vitreous material, so that silica, alumina and the like are eluted to change the form of the waste, and the silicic acid of the fertilizer component originally contained in the waste is changed. The elution characteristics are adjusted, and the improvement of fertilizer retention and the fixing of harmful heavy metals are achieved. Furthermore, water permeability and water retention can be improved by adding a binder component as necessary to obtain a granular material that does not disintegrate in water.

  Of the functions as a greening material, the fertilizer required as a fertilizer is achieved by adjusting the amount and form of the fertilizer components contained in the waste and adding the deficiency. That is, the amount of the fertilizer component can be adjusted by treating the waste with an acidic liquid and adding the shortage. Moreover, the form as a fertilizer can be adjusted by granulation and a fertilizer component can be disperse | distributed uniformly. In addition, the uniformity of the produced greening material is achieved by forming the material with the same specific gravity and different particle sizes.

  Fine silica, which is useful as a fertilizer, elutes in the solution after being treated with an acidic liquid, but immediately precipitates as crystals and coarsens, so that many useful fertilizer components remain and solid-liquid separation characteristics Can be improved.

  In the method for producing a greening material using the waste according to the present invention, the washing treatment after the acid treatment needs to be performed until the washing water is in the range of pH 4 to 7.5, until the pH is in the above range. The washing process and the solid-liquid separation are repeated. The cleaning process is usually insufficient only once and needs to be performed at least twice. In order to ensure the cleaning effect, it is preferably performed 3 to 4 times.

  In the present invention, solid-liquid separation can be performed using a filter press, a belt press, a vacuum dehydrator, a screw press, a disk dehydrator, or the like. In particular, an apparatus using a filter cloth horizontally is preferable because it can be washed immediately after solid-liquid separation.

  In the method for producing a greening material using the waste according to the present invention, it is preferable to further granulate the obtained greening material. By performing granulation, a greening material that does not collapse in water can be obtained. Granulation is not appropriate to be performed by a pressurization method with a small amount of water, and from the viewpoint that it can be performed in a short time, using any device of a stirring method, a rolling method and an extrusion method. Preferably it is done.

  The particle size of the greening material is preferably set to an appropriate particle size in consideration of handleability, fertilizer effect and the like. Specifically, the 0.2 mm sieve passage ratio is preferably 10% by weight or less, and the 5 mm sieve passage ratio is preferably 90% by weight or more. A large number of particles of 0.2 mm or less is not preferable because problems such as material separation in which a large amount of dust occurs occur and water permeability decreases during cultivation. On the other hand, when there are many particles of 5 mm or more, the surface area is decreased, the fertilization efficiency is deteriorated, and the water retention amount is decreased.

  In addition, particles smaller than 0.2 mm and particles larger than 5 mm that are out of the proper range are crushed to 0.1 mm or less and then returned to the mixing step before granulation, so that all of them finally become green without any waste. It can be used as a material.

  According to the present invention, waste that has problems with respect to fertilization efficiency, soil characteristics and safety is treated with an acidic liquid, then separated into solid and liquid, and washed with water, so that the eluate characteristics that are soil characteristics A greening material excellent in (pH, conductivity), fertilizer and phosphate absorption coefficient and having high safety can be obtained.

  Moreover, fertilizer property, water permeability, water retention property, etc. can be improved by adding a fertilizer component, a soil component, a binder component etc. to the washing cake after water washing as needed. Moreover, if this is granulated and dried, it will become a granule which is strong and has good water resistance, and water permeability, water retention and fertilizer retention, which are soil properties, will be improved. Moreover, fertilizer efficacy is also improved by optimizing and uniformly dispersing fertilizer components.

The types of waste that can be used in the present invention are not particularly limited, but those having a large glassy SiO ₂ content and an average particle size of 30 μm or less are preferred. If these conditions are not satisfied, it is preferable to bring the above conditions as close as possible by mixing different types of waste or by pulverizing in advance.

  Specific wastes that can be used in the present invention are those selected from incineration ash, carbides, slag, sludge, waste concrete and any combination thereof.

  Examples of the incineration ash include paper / plastic incineration ash, coal ash, paper sludge ash, sewage sludge incineration ash, waste incineration ash, biomass combustion ash, livestock manure combustion ash, and the like.

  Examples of the carbides include paper / plastic carbides, paper sludge carbides, sewage sludge carbides, garbage carbides, biomass carbides, and livestock manure carbides.

  Examples of the slag include steel slag, waste molten slag, sewage sludge molten slag, sewage sludge molten slag, silica fume, asbestos and other molten slag.

  Examples of the sludge include construction sludge, clean water sludge, sewage sludge, crushed sludge and the like.

  Of the above waste, the combination of carbide with low bulk specific gravity, coal ash with a lot of silica, sewage sludge incineration ash and biomass combustion ash with a lot of phosphorus and potash, and construction sludge with a lot of clay will give an appropriate amount of fertilizer. It is preferable from the viewpoint of containing a greening material with good water retention and high strength.

The acid that can be used as the acidic liquid of the present invention is not particularly limited, but is selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid, oxalic acid, acetic acid, phosphoric acid, iron chloride, iron sulfate, aluminum sulfate, and any combination thereof. It is a thing. Of these, hydrochloric acid and sulfuric acid are preferred from the viewpoint of economy. In particular, hydrochloric acid is preferable for waste containing a large amount of alkaline earth metal, Cl, SO _{4 and the} like. However, when the content of harmful metal is high, it is preferable to use iron chloride, iron sulfate, aluminum sulfate alone or in combination with hydrochloric acid or the like. The pH of the acid treatment with the acidic solution is 3 or less, and particularly preferably 1 or less. When the pH is higher than 3, the glassy structure is not easily destroyed, and the elution of alkali metal, alkaline earth metal, alumina, silica and the like is reduced. In addition, since the acid treatment effect becomes insufficient, the effect of improving soil physical properties and fertilization efficiency becomes insufficient, and safety becomes a problem. The conditions for the acid treatment are preferably from room temperature to 250 ° C. for 1 to 24 hours, particularly preferably from 60 to 180 ° C. for 2 to 6 hours. As the temperature increases, the reaction rate increases and the processing time can be shortened.

  In this invention, you may add the component selected from the group which consists of a fertilizer component, a soil component, a binder component, and these arbitrary combinations to a washing cake. The fertilizer component can be selected from the group consisting of an alkali source material, a bitter earth source material, a potassium source material, a phosphate source material, a nitrogen source material, and any combination thereof.

  Examples of the alkali source material include quick lime, slaked lime, calcium carbonate, limestone fine powder, cement, steel slag powder, lime cake, shells and fired products thereof, quick lime, slaked lime, cement, steel slag powder, lime cake, shells and Examples of these fired products and any combination thereof can be given. As the alkali source material, those having a pH of around 10 are preferable, but from this point, calcium carbonate, limestone fine powder, lime cake and the like are preferable because pH adjustment is easy.

  Examples of the bitter earth source material that can be used in the present invention include magnesium sulfate, magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium chloride, magnesium nitrate, dolomite, bitter lime, and any combination thereof. Of the above, magnesium sulfate, magnesium carbonate, dolomite and the like, which have a relatively low pH and easily form a calcium-insoluble salt, are suitable.

  Examples of the potassium source material that can be used in the present invention include potash glass, potassium oxide, potassium hydroxide, potassium carbonate, potassium sulfate, potassium chloride, potassium nitrate, and any combination thereof. Of the above, potassium carbonate, potassium sulfate, and the like, which have a relatively low pH and easily form calcium and poorly soluble salts, are preferable.

  Examples of the phosphoric acid source material that can be used in the present invention include phosphoric acid, phosphate, apatite, sewage sludge incineration ash, bone meal, oil scum, livestock manure, and any combination thereof. Of the above, apatite, bone meal, oil cake and the like having a relatively low pH and a relatively low dissolution rate are preferred.

  Examples of the nitrogen source material that can be used in the present invention include ammonium sulfate, ammonium chloride, urea, lime nitrogen, nitrate, oil cake, livestock manure, and any combination thereof. Of the above, ammonium sulfate, urea, livestock manure, etc., which have a relatively low pH and are likely to produce a poorly soluble salt with calcium or have a relatively low dissolution rate, are suitable.

  Examples of the soil component include red talcum, red soil, black soil, kanuma soil, vermiculite, peat moss and humic acid containing humic acid, humus soil, compost, zeolite, and any combination thereof. Among the above, vermiculite, peat moss, humic material, humus and the like that are lightweight and have a relatively large cation exchange capacity are suitable.

  Since the types and amounts of the fertilizer component and the soil component added in the present invention vary depending on the type of waste and the plant to be cultivated, it is necessary to make adjustments individually. If the amount of the fertilizer component is small, a sufficient growth effect of the plant does not appear, and if it is large, various growth disorders occur. The amount of fertilizer component can often be adjusted by waste alone or by combining waste. The addition of soil components is performed for the purpose of improving fertilizer retention and the like, and as the fertilizer retention increases, the amount of fertilizer components can be increased.

  Although the binder component in the present invention may be unnecessary depending on the waste, it is necessary for obtaining a powdery body that is stronger and has better water resistance. Examples of binder components that can be used include those selected from the group consisting of inorganic powder attapulgite, polymeric polyvinyl alcohol, carboxymethylcellulose, methylcellulose, polyacrylic acid Na, lignin sulfonic acid Na, and any combination thereof. can do. By using an inorganic attapulgite and a polymer binder component at the same time, a stronger granular material can be obtained. The addition amount of the binder component is preferably 1 to 10% by weight in the case of an inorganic powder-based binder component, and 0.1 to 2% by weight in the case of a polymer-based binder component.

  The greening material obtained by the method for producing a greening material using the waste of the present invention has an eluate having a pH of 4 to 7.5, an electrical conductivity (EC) of 2 ms / cm or less, and a cation exchange capacity of 15 meq /. 100 g or more and the content of soluble silicic acid is in the range of 0.2 to 15% by weight.

Here, in this specification, the pH and conductivity of the eluate of the greening material are respectively 10 g of the greening material in 25 ml of distilled water, and after 1 hour with stirring, the glass electrode pH meter and the electrical conductivity are respectively obtained. This is measured using a system. The cation exchange capacity is measured by the semi-micro Schollenberger method of the soil environment analysis method (Soil Nutrition Measurement Committee (1976)). By filling in this order, passing 1M ammonium acetate solution from above, washing with ethanol, passing sodium chloride solution, and quantifying NH ₄ ⁺ in this sodium chloride solution by steam distillation method The cation exchange capacity is required. The content of soluble silicic acid refers to that obtained by measuring the amount of silicic acid dissolved in a 0.5N NaOH solution at 60 ° C.

An embodiment of a method for producing a greening material using waste according to the present invention will be specifically described based on the drawings. Fig. 1 shows a case where waste 1 containing bitter earth, potassium, phosphoric acid, etc. is subjected to acid treatment with an acidic solution, followed by two washing treatments with water and drying to produce a greening material. It is the conceptual diagram which showed one Embodiment. In this embodiment, waste 1 (coal ash) 100 containing 60.3% by weight of SiO ₂ , 0.4% by weight of clay, 0.65% by weight of potassium, and 0.15% by weight of phosphoric acid. 250 parts by weight of water and 30 parts by weight of hydrochloric acid are added to parts by weight, and after acid treatment at 95 ° C. for 3 hours (step 2), solid-liquid separation (step 3) is performed to obtain cake 4. Next, 1000 parts by weight of water is added to the cake 4 and stirred at room temperature for 15 minutes for washing treatment (step 5), followed by solid-liquid separation (step 6) to obtain the cake 7. Further, 1000 parts by weight of water was added to cake 7 and stirred at room temperature for 15 minutes to perform washing treatment (step 8). After confirming that the pH of the washing water was in the range of 4 to 7.5, again The washing cake 10 is obtained by solid-liquid separation (step 9). This is dried with stirring (step 11) to obtain a greening material having a particle diameter of 1 to 6 mm. The acidic waste water generated in the acid treatment step 2, the washing treatment step 5 and the washing treatment step 8 can be discarded by the neutralization treatment.

Figure 2 shows the waste 1 containing a lot of CaO, a small amount of bitter earth, potassium, phosphoric acid, etc., after acid treatment with an acidic solution, twice washing with water and granulating. It is the conceptual diagram which showed one Embodiment in the case of drying and manufacturing a greening material. In this embodiment, waste 1 (paper sludge ash) containing 36.1 wt% SiO ₂ , 3.3 wt% clay, 1.15 wt% potassium and 0.12 wt% phosphoric acid. To 100 parts by weight, 250 parts by weight of water and 115 parts by weight of hydrochloric acid are added, and after 4 hours of acid treatment (step 2) at 80 ° C., solid-liquid separation (step 3) is performed to obtain cake 4. Next, 1000 parts by weight of water is added to the cake 4 and stirred at room temperature for 15 minutes for washing treatment (step 5), followed by solid-liquid separation (step 6) to obtain the cake 7. Next, 1000 parts by weight of water is added to the cake 7 and stirred at room temperature for 15 minutes to perform a washing treatment (step 8). After confirming that the pH of the washing water is in the range of 4 to 7.5, Solid-liquid separation (step 9) is performed again to obtain a washing cake 10. Further, 0.05 parts by weight of ammonium sulfate and 3 parts by weight of attapulgite are added to the washing cake 10, granulated while stirring (Step 13), and then dried (Step 11), and the greening of 1 to 5 mm is performed. Get the materials.

  The present invention will be described based on the following examples, but the present invention is not limited to the following description.

  In the following examples and comparative examples, the alkali source refers to the total content of CaO and MgO, the content of soluble bitter earth, the content of soluble potassium, and the content of soluble phosphoric acid. The amounts are those obtained by measuring the amount dissolved in a 1% by weight citric acid solution.

Example 1
A greening material was manufactured using coal ash having the composition shown in Table 1. First, 250 parts by weight of water and 40 parts by weight of hydrochloric acid are added to 100 parts by weight of coal ash (average diameter 22 μm), and after acid treatment (pH <3) at 95 ° C. for 4 hours, solid-liquid separation is performed to obtain a cake. Got. Next, 1000 parts by weight of water was added to the cake, and the mixture was stirred at room temperature for 15 minutes, followed by solid-liquid separation. Further, 1000 parts by weight of water was added to the cake and stirred at room temperature for 15 minutes, and then solid-liquid separation was performed again to obtain a washed cake. The pH of the cleaning solution at this time was in the range of 4 to 7.5. The washed cake was dried with stirring to obtain a powdered greening material. The greening material has an alkali source content of 0.8% by weight, a soluble silicic acid content of 5% by weight, a soluble soluble clay content of 0.15% by weight, a soluble potassium content of 0.3% by weight, and a soluble phosphoric acid. Content of 0.06 wt%, pH of eluate is 4.9, conductivity (EC) is 0.84 ms / cm, cation exchange capacity (CEC) is 18 meq / 100 g, Satisfied the soil environmental standards.

(Example 2)
Greening materials were manufactured using papermaking sludge ash having the composition shown in Table 1. First, 250 parts by weight of water and 115 parts by weight of hydrochloric acid were added to 100 parts by weight of paper sludge ash (average diameter 87 μm), and after acid treatment (pH <3) at 80 ° C. for 4 hours, solid-liquid separation was performed. I got a cake. Next, 1000 parts by weight of water was added to the cake, and the mixture was stirred at room temperature for 15 minutes, followed by solid-liquid separation. Further, 1000 parts by weight of water was added to the cake and stirred at room temperature for 15 minutes, and then solid-liquid separation was performed again to obtain a washed cake. The pH of the cleaning solution at this time was in the range of 4 to 7.5. To this washed cake, 0.05 part by weight of ammonium sulfate and 4 parts by weight of attapulgite powder were added, granulated while stirring, and then dried to obtain a greening material of 1 to 5 mm. The alkalinity content of the greening material is 13% by weight, soluble silicic acid content is 6% by weight, soluble soluble clay content is 1.8% by weight, molten clay is 0.7% by weight, soluble phosphoric acid content is 0% 0.07 wt%, soluble nitrogen content 0.03% wt, pH of eluate 5.9, conductivity (EC) 0.78 ms / cm, cation exchange capacity (CEC) 23 meq / 100 g. Moreover, even if this greening material was thrown into water, it did not collapse.

(Example 3)
Greening materials were produced using sewage sludge incineration ash having the composition shown in Table 1. First, 250 parts by weight of water, 30 parts by weight of hydrochloric acid and 20 parts by weight of ferric chloride are added to 100 parts by weight of sewage sludge incineration ash (average diameter 45 μm), and acid treatment (pH <3) is performed at 180 ° C. for 2 hours. After performing, solid-liquid separation was performed to obtain a cake. Next, 1000 parts by weight of water was added to the cake, and the mixture was stirred at room temperature for 15 minutes, followed by solid-liquid separation. Further, 1000 parts by weight of water was added to the cake and stirred at room temperature for 15 minutes, and then solid-liquid separation was performed again to obtain a washed cake. The pH of the cleaning solution at this time was in the range of 4 to 7.5. Add 0.05 parts by weight of ammonium sulfate, 3 parts by weight of attapulgite powder, and 0.5 parts by weight of polyvinyl alcohol powder to this washed cake, granulate with stirring, and then dry to obtain a 1-5 mm greening material. Obtained. The greening material has an alkali source content of 3.6% by weight, a soluble silicic acid content of 4% by weight, a soluble soluble clay content of 1.4% by weight, a soluble soluble potassium content of 0.4% by weight, and soluble soluble phosphoric acid. The content is 10.4% by weight, the soluble nitrogen content is 0.03% by weight, the pH before elution is 6.1, the conductivity (EC) is 0.64 ms / cm, and the cation exchange capacity (CEC). Was 52 meq / 100 g, and the leaching amount of harmful substances satisfied the soil environmental standards.

(Example 4 ... No binder component)
Greening materials were manufactured using papermaking sludge ash having the composition shown in Table 1. First, 250 parts by weight of water and 105 parts by weight of hydrochloric acid are added to 100 parts by weight of papermaking sludge ash (average diameter 87 μm), and after acid treatment (pH <3) at 60 ° C. for 4 hours, solid-liquid separation is performed. I got a cake. Next, 1000 parts by weight of water was added to the cake, and the mixture was stirred at room temperature for 15 minutes, followed by solid-liquid separation. Further, 1000 parts by weight of water was added to the cake and stirred at room temperature for 15 minutes, and then solid-liquid separation was performed again to obtain a washed cake. The pH of the cleaning solution at this time was in the range of 4 to 7.5. 0.05 parts by weight of ammonium sulfate was added to the washed cake, granulated while stirring, and then dried to obtain a greening material of 1 to 5 mm. The alkali source content of the greening material is 14.5% by weight, soluble silicic acid content is 4% by weight, soluble soluble clay content is 1.5% by weight, soluble potassium content is 0.5% by weight, soluble phosphoric acid The content is 0.05% by weight, the soluble nitrogen content is 0.03% by weight, the pH of the eluate is 6.3, the conductivity (EC) is 0.64 ms / cm, and the cation exchange capacity (CEC). Was 16 meq / 100 g. Moreover, when this greening material was thrown into water, it gradually collapsed.

(Comparative example: pH of acid treatment = 4.5)
A greening material was manufactured using coal ash having the composition shown in Table 1. First, 250 parts by weight of water and 4.5 parts by weight of hydrochloric acid are added to 100 parts by weight of coal ash (average diameter 22 μm), and after acid treatment (pH = 4.5) at 95 ° C. for 4 hours, solid liquid Separated to obtain a cake. Next, 1000 parts by weight of water was added to the cake, and the mixture was stirred at room temperature for 15 minutes, followed by solid-liquid separation. Further, 1000 parts by weight of water was added to the cake and stirred at room temperature for 15 minutes, and then solid-liquid separation was performed again to obtain a washed cake. The pH of the cleaning solution at this time was in the range of 4 to 7.5. The washed cake was dried with stirring to obtain a greening material of 1 to 6 mm. The greening material has an alkali source content of 1.0% by weight, a soluble silicic acid content of 0.1% by weight, a soluble clay content of 0.20% by weight, a soluble potassium content of 0.4% by weight, and a soluble material. Phosphoric acid content is 0.08 wt%, pH before elution is 7.9, conductivity (EC) is 0.65 ms / cm, cation exchange capacity (CEC) is 9.4 meq / 100 g, The amount of toxic substance elution did not satisfy the soil environmental standards.

  Since the greening material of the present invention is excellent in fertilizing effect, soil properties and safety, it can be used in the fields of horticultural, field action, and greening materials.

An example of producing a greening material by treating the waste containing bitter earth, potassium, phosphoric acid, etc. with acid treatment with an acid solution followed by two washing treatments with water and drying. It is a conceptual diagram. Waste containing a lot of CaO, a small amount of bitter earth, potassium, phosphoric acid, etc. is acid-treated with an acidic solution, then washed twice with water, granulated, dried, and greened It is the conceptual diagram which showed an example in the case of manufacturing materials.

Explanation of symbols

2 Acid treatment process 3, 6, 9 Solid-liquid separation process 5, 8 Washing treatment process 11 Drying process 13 Granulation process

Claims (17)

  A method for producing a greening material using waste, wherein after adding water and an acidic liquid to the waste and performing an acid treatment at a pH of 3 or less, solid-liquid separation is performed to obtain a cake. Manufacturing a planting material characterized by adding a water to obtain a washed cake by repeating washing treatment and solid-liquid separation until the washing water has a pH in the range of 4 to 7.5, and then drying the washed cake. Method.   The greening material according to claim 1, wherein the washing cake is further dried after adding and mixing a component selected from the group consisting of a fertilizer component, a soil component, a binder component and any combination thereof. Manufacturing method.   A method for producing a greening material, further comprising granulating the greening material according to claim 1 or 2.   The eluate of the greening material has a pH of 4 to 7.5, an electrical conductivity (EC) of 2 ms / cm or less, a cation exchange capacity of 15 meq / 100 g or more, and a soluble silicic acid content of 0.2 to 15% by weight. The method for producing a greening material according to any one of claims 1 to 3, wherein the greening material is in a range of.   The method for producing a greening material according to any one of claims 1 to 4, wherein the waste is selected from the group consisting of incinerated ash, carbide, slag, sludge, waste concrete, and any combination thereof.   The incineration ash is selected from the group consisting of paper / plastic incineration ash, coal ash, paper sludge ash, sewage sludge incineration ash, waste incineration ash, biomass combustion ash, livestock manure combustion ash, and any combination thereof. A method for producing a greening material according to claim 5.   6. The greening material according to claim 5, wherein the carbide is selected from the group consisting of paper / plastic carbide, paper sludge carbide, sewage sludge carbide, garbage carbide, biomass carbide, livestock manure carbide, and any combination thereof. Manufacturing method.   6. The slag is selected from the group consisting of steel slag, refuse molten slag, sewage sludge molten slag, sewage sludge melted slag, silica fume, asbestos, and any combination thereof. The manufacturing method of the greening material of description.   The method for producing a greening material according to claim 5, wherein the sludge is selected from the group consisting of construction sludge, clean water sludge, sewage sludge, crushed stone sludge, and any combination thereof.   The acid solution is selected from the group consisting of hydrochloric acid, sulfuric acid, nitric acid, oxalic acid, acetic acid, phosphoric acid, iron chloride, iron sulfate, aluminum sulfate, and any combination thereof. The manufacturing method of the greening material as described in 2. The fertilizer component is selected from the group consisting of an alkali source material, a clay source material, a potassium source material, a phosphate source material, a nitrogen source material, and any combination thereof,
The alkali source material is selected from the group consisting of quick lime, slaked lime, calcium carbonate, limestone fine powder, cement, steel slag powder, lime cake, shellfish and fired products thereof, and any combination thereof,
The source material for the clay is selected from the group consisting of magnesium sulfate, magnesium oxide, magnesium hydroxide, magnesium carbonate, magnesium chloride, magnesium nitrate, dolomite, limestone lime, and any combination thereof,
The potassium source material is selected from the group consisting of potash glass, potassium oxide, potassium hydroxide, potassium carbonate, potassium sulfate, potassium chloride, potassium nitrate, and any combination thereof,
The phosphoric acid source material is selected from the group consisting of phosphoric acid, phosphate, apatite, sewage sludge incineration ash, bone meal, oil cake, livestock manure and any combination thereof,
3. The method for producing a greening material according to claim 2, wherein the nitrogen source material is selected from the group consisting of ammonium sulfate, ammonium chloride, urea, lime nitrogen, nitrate, oil cake, livestock manure, and any combination thereof.   The soil component is selected from the group consisting of red jade soil, red soil, black soil, Kanuma soil, vermiculite, peat moss and humic materials including humic acid, humus soil, compost, zeolite, and any combination thereof. A method for producing a greening material according to claim 2.   The method for producing a greening material according to claim 2, wherein the binder component is selected from the group consisting of attapulgite, polyvinyl alcohol, carboxymethyl cellulose, methyl cellulose, polyacrylic acid Na, lignin sulfonic acid Na, and any combination thereof. .   The method for producing a greening material according to claim 3, wherein the granulation is performed by any one of a stirring method, a rolling method, and an extrusion method.   The method for producing a greening material according to any one of claims 1 to 14, wherein the acid treatment is performed at normal temperature to 250 ° C for 0.5 to 24 hours.   The method for producing a greening material according to any one of claims 1 to 15, wherein the greening material is classified to select a greening material having a particle diameter in a predetermined range. The greening material manufactured by the manufacturing method of the greening material in any one of Claims 1 thru | or 16.

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