JP2007063438A - Method for improving soil quality of waste soil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a practically useful method for improving the soil quality of a waste soil, which comprises producing a compost from a cut grass and a waste mushroom bed and mixing the waste soil with the resultant compost, to recover the nutrition of the waste, and, not only can improve the added value of the waste soil, but also can reduce the cost for the waste treatment and the load on the natural environment by effectively utilizing the waste soil, cut grass and/or waste mushroom bed having conventionally been disposed of as an industrial waste. <P>SOLUTION: The method for improving the soil quality of a waste soil comprises grinding the cut grass 1 and the waste mushroom bed 2, fermenting the ground cut grass 1 and the waste mushroom bed 2, to produce a compost 3, and then improving the soil quality of a waste soil 4 by mixing the compost 3 with the waste soil 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for improving soil quality of waste soil (residual soil) generated at a construction site such as construction work or civil engineering work.

  Conventionally, a large amount of waste soil (residual soil) is generated at construction sites such as building construction and civil engineering work, but this waste soil contains almost all nutrients such as nitrogen, phosphorus and potassium necessary for plant growth. Therefore, at present, the main use of waste soil is limited to embankment materials such as roads, and most of the waste soil is landfilled as industrial waste without being reused.

  Similarly, mowed grass on rivers and roadsides, and mushroom waste fungus beds generated at mushroom cultivation factories are incinerated as industrial waste without being effectively used.

  However, it is not preferable to dispose of the above-mentioned waste soil, mowed grass, mushroom waste fungi beds and the like as industrial waste in terms of costs related to waste treatment and a load on the natural environment.

  The present invention uses the waste mushroom and mushroom waste fungus bed as compost, and mixes the compost with the waste soil to restore the nutrition of the waste soil, thereby increasing the added value of the waste soil and increasing the use of the waste soil. Not only can it be expanded, but the effective use of waste soil, mowing grass, and mushroom waste fungi that have been disposed of as industrial waste in the past will reduce the costs and waste associated with the disposal of these mushrooms. The present invention provides a soil improvement method for waste soil having excellent practicality.

  The gist of the present invention will be described with reference to the accompanying drawings.

  The chopped grass 1 and the mushroom waste fungus bed 2 are pulverized, and then the crushed cut grass 1 and the mushroom waste fungus bed 2 are fermented to become compost 3, and then the compost 3 is mixed into the waste soil 4. The present invention relates to a soil quality improvement method for waste soil characterized by improving the soil quality of the waste soil 4.

  Moreover, the said mushroom waste fungus bed 2 is based on the soil improvement method of waste soil of Claim 1 characterized by including the brewer's yeast and the corn core at least.

  In addition, the fermentation is performed while the pulverized cut grass 1 and the mushroom waste fungus bed 2 are put into a rotary stirring device 8 such as a concrete mixer, and stirring is performed in the rotary stirring device 8. It concerns on the soil quality improvement method of waste soil of any one of Claim 1, 2 to do.

  Moreover, the said compost | mixing 3 is mixed with the said waste soil 4 with the solidification agent 11, It concerns on the soil quality improvement method of the waste soil of any one of Claims 1-3 characterized by the above-mentioned.

  As described above, the present invention, as described above, obtained compost from mushrooms and mushroom waste fungus bed, and reinforced nutrients such as nitrogen, phosphorus and potassium that are lacking in the waste soil by mixing this compost into the waste soil. The added value of this waste soil can be increased and the use of waste soil can be expanded, and the waste soil, cut grass, and mushroom waste fungi that have been disposed of as industrial waste can be effectively used to treat these wastes. It becomes the soil quality improvement method of the waste soil excellent in the practical use which can reduce the cost and the load with respect to a natural environment which concern.

  In addition, according to the invention of claim 2, since beer yeast is contained in the mushroom waste fungus bed, fermentation of the cut grass and mushroom waste fungus bed can be promoted by this beer yeast, Since corn core is also included, microorganisms such as brewer's yeast will grow and be activated using the sugar content in this corn core as a nutrient, thereby improving the fermentation efficiency of mushrooms and mushroom waste beds. It becomes a soil quality improvement method of waste soil that can be made to be more practical.

  According to the invention described in claim 3, the pulverized cut grass and mushroom waste fungus bed are introduced into a rotary agitator such as a concrete mixer, and the cut grass and mushroom waste fungus bed are stirred in the rotary agitator. Therefore, oxygen can be efficiently supplied to the microorganisms that ferment the mushrooms and mushroom waste fungus bed by stirring, and the fermentation of the mowed grass and mushroom waste fungus beds by the microorganisms can be favorably advanced. Fermentation with microorganisms can proceed while mixing the mushroom waste fungus bed evenly and uniformly, and this makes it possible to obtain high-quality compost that has been uniformly fermented, and the mushroom and mushroom waste fungus beds. Because the fermentation is performed while being separated from the outside in a rotary stirring device such as a concrete mixer, the odor accompanying the fermentation of mushrooms and mushroom waste bed is also diffused to the outside. Becomes more soil improvement method Xiu the waste soil in practicability which can be stopped.

  Further, according to the invention described in claim 4, since the solidifying agent is mixed into the waste soil modified by composting, for example, the modified waste soil is solidified by appropriate selection of the solidifying agent. However, it is possible to prevent dust and turbid water from being generated from the modified waste soil, and therefore, the utility of the modified waste soil can be improved. It becomes the soil quality improvement method of waste soil.

  Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

  The chopped grass 1 and the mushroom waste fungus bed 2 are pulverized, the crushed cut grass 1 and the mushroom waste fungus bed 2 are fermented into compost 3, and the compost 3 is mixed with the waste soil 4 to remove the soil quality of the waste soil 4. To improve.

  The cut grass 1 in the present invention is obtained by cutting grass that grows naturally on rivers, roadsides, etc., and is generated by artificial cultivation of mushroom waste fungus bed 2 and mushrooms, and as conventional industrial waste Although it has been incinerated, by pulverizing and fermenting the cut grass 1 and the mushroom waste bed 2, microorganisms propagate in the pulverized product of the cut grass 1 and the mushroom waste bed 2 to decompose organic matter. And a compost 3 rich in nitrogen, phosphorus and potassium.

  In addition, the waste soil 4 in the present invention is waste soil 4 (residual soil) generated at construction sites such as construction work and civil engineering work, and most of nutrients such as nitrogen, phosphorus and potassium necessary for plant growth are present. Since it is not included, it is disposed of in landfills other than being reused for embankment materials such as roads, etc., but by mixing the compost 3 rich in nitrogen, phosphorus and potassium, nutrients are recovered, Germination and growth of plant seeds and the like are performed well.

  Therefore, in the present invention, not only the added value of the waste soil 4 is increased and the use of the waste soil 4 is expanded, but also the waste soil 4, the cut grass 1 and the mushroom waste fungus bed 2 which have been disposed as industrial wastes are effectively used. By using it, it is possible to reduce the costs related to these waste treatments and the load on the natural environment.

  In addition, for example, if the mushroom waste fungus bed 2 includes at least brewer's yeast and corn core, fermentation of the cut grass 1 and the mushroom waste fungus bed 2 is promoted by microorganisms such as brewer's yeast, and mushroom waste. Since the fungal bed 2 includes corn core, the fermentation of the hay 1 and the mushroom waste bed 2 is more efficient by the growth and activation of microorganisms using the sugar contained in the corn core as a nutrient. To be done.

  In addition, for example, the fermentation is performed while the pulverized cut grass 1 and the mushroom waste fungus bed 2 are placed in a rotary stirring device 8 such as a concrete mixer and stirring is performed in the rotary stirring device 8. Then, oxygen is efficiently supplied to the microorganisms that ferment the hay 1 and mushroom waste bed 2 by stirring, and the fermentation of the hay 1 and mushroom waste bed 2 proceeds very well, and the hay 1 and mushroom waste by stirring. Fermentation proceeds while the fungus bed 2 is evenly mixed evenly, so that a high-quality compost 3 that is uniformly fermented can be obtained, and the fermentation of the cut grass 1 and the waste mushroom bed 2 can be performed. Since it is carried out while being separated from the outside in the rotary stirring device 7 such as a concrete mixer, the diffusion of the odor accompanying the fermentation of the cut grass 1 and the waste mushroom bed 2 to the outside is prevented.

  Also, for example, if the compost 3 is mixed with the waste soil 4 together with the solidifying agent 11, for example, the modified waste soil 4 is solidified by the appropriate selection of the solidifying agent 11, and this reforming is performed. By preventing dust and muddy water from being generated from the generated waste soil 4, the utility of the modified waste soil 4 is improved.

  Specific embodiments of the present invention will be described with reference to the drawings.

  The present embodiment is a method for improving waste soil. As shown in FIG. 1, the mushroom 1 waste mushroom bed 2 is recovered, and the mushroom 1 mushroom waste mushroom bed 2 is recovered from the shredder 6. Is pulverized into a comminuted product, and the comminuted product is put into the rotary stirrer 8 and decomposed and fermented with stirring to give compost 3. 3. This is a case where the waste soil 4 and the solidifying agent 11 are put into the soil quality improvement machine 10 so that the waste soil 4 becomes the modified waste soil 6.

  Specifically, in this embodiment, as the mowing grass 1, the roadside / river mowing grass 1 (for example, 1 ton) and the mushroom waste fungus bed 2 (for example, 0.3 ton) are about 0.5 cm in the shredder 6. Finely pulverized to obtain a pulverized product.

  The finer the mowing grass 1 and the mushroom waste fungus bed 2 are, the faster the decomposition fermentation is, and it can be expected to shorten the composting time and improve the fertilization effect. Therefore, it is preferable to grind so that at least one side becomes smaller than 2 cm. .

  Moreover, in the present Example, the mushroom waste microbial bed 2 that includes beer yeast and corn core was employed.

  By including beer yeast and corn core in the mushroom waste bed 2, microorganisms such as the beer yeast contribute to fermentation of the cut grass 1 and mushroom waste bed 2, and microorganisms such as this beer yeast Since the sugar contained in the corn core contained in the mushroom waste fungus bed 2 grows as nutrients, the microorganisms propagate well in the pulverized product of the mowed grass 1 and the mushroom waste fungus bed 2 and the organic matter. Decomposition fermentation can be promoted.

  The mushroom waste fungus bed 2 containing a large amount of sawdust is not preferable. That is, since sawdust contains many organic substances that are difficult to decompose, such as lignin, and it is difficult to decompose microorganisms, use the mushroom waste fungus bed 2 with a low content of such raw materials that contain a lot of organic substances that are difficult to decompose. Is preferred.

  Next, in this example, the pulverized product was charged into the rotary stirring device 8 by the belt conveyor 7.

  In addition, the rotary stirring apparatus 8 of the present Example used a concrete mixer 8 whose inlet was remodeled so that the pulverized product could be easily added. Therefore, it becomes possible to efficiently perform the operation of charging the pulverized material by the belt conveyor 7 and the input port where the pulverized material of the concrete mixer 8 is easily input.

  Next, in this example, the pulverized product was fermented in the concrete mixer 8 while being periodically stirred.

  Specific stirring conditions were set to perform stirring for about 10 minutes per day, about 10 minutes per day, and this was continued for one week to compost the pulverized product.

  By fermenting the pulverized product with periodic stirring in this way, the air permeability in the pulverized product is improved, so that oxygen is well supplied to the microorganism, and the cut grass 1 and the waste mushroom bed 2 by the microorganism. It was possible to promote the decomposition fermentation of the pulverized product.

  In addition, the stirring did not cause unevenness in the degree of fermentation of the pulverized product, and it was possible to obtain a high-quality compost 3 that was uniformly fermented as a whole.

  In addition, in the present embodiment, the mowing grass 1 and the mushroom waste fungus bed 2 are stirred while being separated from the outside in the concrete mixer 8, so that the odor generated during stirring can be prevented from leaking to the outside.

  In addition to the present embodiment, the above stirring conditions may be appropriately set according to the degree of fermentation.

  Next, in this example, the compost 3 was carried into the stock yard 9 and deposited for 90 to 180 days in order to increase the degree of ripeness, thereby obtaining a fully composted compost 3.

  The compost 3 is further fermented during deposition, and the temperature of the compost 3 becomes high, so that a sterilizing effect of pathogenic bacteria on the plant can be expected.

  Further, the degree of maturity of the organic matter increases during the deposition, the organic matter in the compost 3 is stabilized, and the compost 3 in a state where it is easy to obtain the fertilizing effect of nutrients such as nitrogen, phosphorus, and potassium contained in the compost 3 can do.

  Next, the fully matured compost 3 is carried into a construction site where the waste soil 4 is generated, a factory for performing an intermediate treatment of the waste soil 4 or the like.

  In this embodiment, the waste soil 5 is a waste soil 5 which is discharged from the construction site as waste soil 4 and is modified by mixing the fully-ripened compost 3 with dehydrated cake (residual soil).

  Specifically, 0.3 to 0.4 tons of fully matured compost 3 and 0.3 to 0.4 tons of solidifying agent 11 are mixed with 1 ton of waste soil 4 using a soil conditioner 10. did.

  In this way, in this embodiment, 0.3 to 0.4 tons of fully-ripened compost 3 is mixed into 1 ton of waste soil 4 so that nitrogen required for plant growth in the waste soil 4 is obtained. It was possible to reinforce nutrients such as phosphorus and potassium.

  If the amount of fully matured compost 3 is less than 0.3 to 0.4 tons, nutrients such as nitrogen, phosphorus, and potassium in the modified waste soil 5 become insufficient, and germination and growth of plant seeds and the like occur. It is not preferable because it is not performed properly, and if it is more than 0.3 to 0.4 ton, the cost of the modified waste soil 5 becomes high, or nitrogen, phosphorus, potassium, etc. in the modified waste soil 5 It is not preferable because of excessive nutrients and groundwater contamination.

  Further, in this embodiment, the solidifying agent 11 is further mixed with the waste soil 4 and the fully-ripened compost 3. As the solidifying agent 11, an appropriate material such as a cement type, a lime type, and a granulating agent is adopted. good.

  By appropriate selection of the solidifying agent 11, for example, the modified waste soil 5 can be solidified so that dust and muddy water are not generated from the modified waste soil 5.

  In addition, since the modified waste soil 5 becomes alkaline depending on the kind of the solidifying agent 11, it is preferable to adjust to a neutral region using an appropriate modifier.

  The modified waste soil 5 obtained by the present embodiment is reinforced with nutrients such as nitrogen, phosphorus and potassium necessary for the growth of the plant by the fully-ripened compost 3, and germination and growth of plant seeds and the like can be achieved. Since the soil can be satisfactorily performed, it is not limited to the conventional embankment materials such as roads, but also has properties suitable for slopes, green zones, and parks.

  Moreover, since the cut grass 1 has a larger carbon ratio than cow dung and the like, the compost 3 of this embodiment obtained by fermenting the cut grass 1 into compost can alleviate the rapid action of other nitrogen fertilizers. Moreover, the improvement effect of physical properties, such as the water permeability of a soil, water retention property, air permeability, and easiness of tillage, and the increase in holding | maintenance ability of cations, such as Ca, Mg, and K, can also be anticipated.

  In the present embodiment, the pre-ripening compost 3 may be mixed into the waste soil 4, but it is preferable to use the fully-ripened compost 3 in terms of the fertilizing effect of nutrients such as nitrogen, phosphorus and potassium.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is explanatory drawing which shows one Example of this invention.

Explanation of symbols

1 Mowed grass 2 Mushroom waste fungus bed 3 Compost 4 Waste soil 8 Rotating stirrer
11 Solidifying agent

Claims (4)

  Crush the cut grass and mushroom waste fungus bed, then ferment the comminuted cut grass and mushroom waste fungus bed to compost, and then mix this compost into the waste soil to remove the soil quality of this waste soil. A soil quality improvement method for waste soil, characterized by improving.   The method for improving soil quality of waste soil according to claim 1, wherein the mushroom waste fungus bed contains at least beer yeast and corn core.   The said fermentation is performed while putting the pulverized mowing grass and mushroom waste fungus bed into a rotary stirring device such as a concrete mixer and stirring in the rotary stirring device. The soil quality improving method of waste soil as described in any one of the above. The soil compost improvement method according to any one of claims 1 to 3, wherein the compost is mixed with the waste soil together with a solidifying agent.

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