JP6621006B2 - Method for promoting stabilization of organic waste - Google Patents

Description

  The present invention relates to a method for promoting stabilization of organic waste.

  Final disposal sites such as managed final disposal sites where waste is landfilled in landfills where impervious works and leachate collection facilities are installed at the bottom, It can be abolished by satisfying the abolition standards stipulated in the “Order for Establishing Technical Standards for Final Disposal and Final Disposal of Industrial Waste”. For example, abolition standards are established for the properties of leachate, the temperature of landfill layers, the generation status of landfill gas, and the like.

  However, the standards for abolition of leachate etc. are very strict, and if the period required from closure of the final disposal site to abolition is long, problems such as an increase in maintenance costs and restrictions on use of the site will arise during that period.

  In particular, the organic waste landfilled at the final disposal site will be decomposed by biological treatment with aerobic microorganisms, and the BOD and COD of leachate will decrease. Since oxygen is supplied only in the vicinity, aerobic biological treatment does not proceed smoothly, or it contains persistent organic substances such as humic acid and fulvic acid that cannot be easily decomposed by aerobic microorganisms. However, it took a considerable long time to abolish.

  Therefore, in Patent Document 1, in order to shorten the period from the closing of the final disposal site until it is abolished, air is sent to the waste layer to promote the decomposition of easily decomposable organic substances by microorganisms, and BOD and Until the COD reaches the decommissioning standard A, a method for shortening the decommissioning time of the final disposal site in which the oxidizing agent is divided into a plurality of times and injected into the waste layer has been proposed.

  Patent Document 2 discloses a method of stabilizing waste by washing organic matter and salts contained in the waste by mechanically washing the waste before landfill, A method is shown in which aeration is performed to wash out or insolubilize organic matter, salts, heavy metals, and the like in waste.

  Further, Patent Document 3 discloses that solid industrial waste, the actual volume ratio when packing is 60% or less of waste, sludge generated in water treatment plants, sewage treatment plants, sludge generated in wastewater treatment facilities, There has been proposed a final disposal method for sludge characterized by being combined with sludge generated in connection with construction work and then landfilled in a final disposal site.

JP 2005-224673 A JP 2009-241053 A JP 2009-45566 A

  However, when the method described in Patent Document 1 is adopted, it is not easy to uniformly supply air to the waste layer thickly buried in the final disposal site, so the period until abolition cannot be effectively shortened. There was a problem.

  In addition, when adopting the method described in Patent Document 2, it is necessary to pre-process waste before carrying it into the final disposal site, and not only the problem of securing a site for constructing pre-treatment facilities However, there is a problem that the cost of water treatment equipment for treating waste water generated by the pretreatment is increased, and the pretreatment cannot be easily performed.

  Therefore, at present, waste is directly landfilled at the final disposal site without being pretreated. Specifically, various types of waste including organic sludge brought in by truck are covered with soil every time a certain amount is landfilled on the impervious work in order from the end of the site. When landfilled and the upper limit is reached, the final soil covering is applied.

  In particular, organic waste brought to the final disposal site, for example, organic sludge with a thermal loss reduction of 15% or more, has poor air permeability and water permeability, and has an aggregate structure in the landfill layer, making the inside anaerobic It becomes a generation source of BOD, COD, TN, etc., brings about deterioration of the quality of raw water to the leachate treatment facility, and hinders the shortening of the period until the final disposal site is abolished. Such organic waste includes not only organic sludge but also inorganic sludge having a thermal loss of less than 15%, incinerated ash containing even a small amount of organic matter, and the like.

  In Patent Document 3, shredder dust is disclosed as waste having an actual volume ratio of 60% or less when packed, but glass, earth and sand, etc. are mixed in addition to metals, and depending on the composition, aeration There was also a problem that sufficient sex could not be secured.

  In view of the above-described problems, an object of the present invention is to provide a method for promoting the stabilization of organic waste that can effectively shorten the period from closing to disposal of the final disposal site.

In order to achieve the above-described object, the first characteristic configuration of the organic waste stabilization promoting method according to the present invention is the organic waste landfilled in the final disposal site as described in claim 1 of the claims. The specific organic waste having a heat loss of 15% or more, and the air permeability coefficient φ determined by Equation 1 is at least greater than the value in the case where the air permeability modifier is not mixed. A breathable modifier mixing step for mixing a breathable modifier in an amount increasing by 50%, and a venting step for ventilating a deposited layer of the specific organic waste mixed with the breathable modifier, The aeration step is performed in a deposit layer of the specific organic waste before being landfilled in the final disposal site, and further includes a landfill step of reclaiming the specific organic waste nitrified in the aeration step in the final disposal site. .
Formula 1: φ = (σ · d) / (p · s)
φ is an air permeability coefficient (L · cm / min · kP · cm ² ), σ is a flow rate (L / min), p is an input / output differential pressure (kP), s is a cross-sectional area (cm ² ), and d is a length (Cm)

As a result of intensive studies by the inventors of the present application, in the air permeability modifier mixing step, air permeability is increased until the air permeability coefficient φ obtained by Equation 1 increases by at least 50% from the value in the case where the air permeability modifier is not mixed. When the property modifier is mixed, sufficient air can be supplied to the deposit layer of the specific organic waste in the aeration step almost uniformly, and the aerobic biological treatment is promoted. As a result, the specific organic waste New findings have been obtained that nitrification of ammonia nitrogen contained in the selenium is promoted. Therefore, when landfilling the specific organic waste whose nitrification treatment is promoted in the final disposal site, the denitrification treatment by microorganisms is promoted under anaerobic conditions, and even if a venting facility is not provided in the deposition layer of the final disposal site, The time required from closing the final disposal site to abolishing it can be effectively shortened.

In the second characteristic configuration, as described in claim 2 , in addition to the first characteristic configuration described above, the breathable modifier mixing step includes waste plastic that has been crushed as a breathable modifier. And / or a step of mixing waste gypsum board with specific organic waste.

  When waste plastic and / or waste gypsum board that has been crushed are used as the breathability modifier, a significant improvement in breathability has come to appear.

In the third feature configuration, as described in claim 3 , in addition to the first or second feature configuration described above, the ventilation step includes a specific organic waste mixed with a breathability modifier . This is a step of ventilating the deposited layer at a flow rate of 5 to 30 L / (min. · M ³ ).

Aerobic biological treatment is effective when aeration rate of 5-30 L / (min. · M ³ ) is passed through the deposited layer of the specific organic waste mixed with the breathable modifier in the breathable modifier mixing step. Will be promoted.

In the fourth feature configuration, as described in claim 4 , in addition to the third feature configuration described above, the ventilation step includes a deposit layer of a specific organic waste mixed with a breathability modifier. This is a step of aeration with an air flow rate of 15 to 30 L / (min. · M ³ ).

Furthermore, when aeration is performed at a flow rate of 15 to 30 L / (min. · M ³ ), the aerobic biological treatment is remarkably promoted.

In the fifth characteristic configuration, as described in claim 5 , in addition to any of the first to fourth characteristic configurations described above, organic sludge, food waste and / or foods may be added to the specific organic waste. The residue is included.

  As specific organic waste, when disposal of organic sludge such as sewage sludge and septic tank sludge, food waste, food residues generated in food factories, etc., to effectively promote stabilization Become.

  As described above, according to the present invention, it is possible to provide a method for promoting the stabilization of organic waste that can effectively shorten the period from closing to disposal of the final disposal site.

Cross section of the main part of the managed final disposal site (A) is explanatory drawing of a permeability coefficient calculation model, (b) is explanatory drawing of the test apparatus for a permeability coefficient measurement. (A) is an explanatory diagram of a landfill pretreatment facility, (b) is an explanatory diagram of the results of breathability tests on specific organic waste mixed with candidate breathability modifiers (A) is a clear diagram of the composition of the test waste used in the breathability test, and (b) and (c) are explanatory diagrams of the breathability test results. Illustration of lysimeter (A) is an explanatory diagram of the composition of the test waste used in the stabilization test, (b) is an explanatory diagram of the filling amount of the test waste into the lysimeter, (c) is an explanatory diagram of the experiment schedule (A) to (f) are diagrams explaining the results of the dissolution test. (A) to (f) are diagrams explaining the results of the leachate test (A), (b) is an explanatory diagram of the results of the nitrogen summation test for leachate

Hereinafter, an embodiment of a method for promoting stabilization of organic waste buried in a managed final disposal site according to the present invention will be described.
FIG. 1 shows the structure of a closed type (also called “covered type”) managed final disposal site 10. The management-type final disposal site 10 (hereinafter may be simply referred to as “final disposal site 10”) is installed and operated based on the structural standards and maintenance management standards stipulated in the law on waste disposal and cleaning, It is disposed of in landfill according to the waste classification stipulated in the law.

  The management-type final disposal site 10 has a mountainous valley as a landfill site and excavated ground divided by a dam 3, and is composed of a non-permeable layer or wall such as a rubber sheet on the bottom or slope of the landfill site. A waterworks 11 is applied, and a drainage facility 12 having a groove and a pipe for collecting and draining leachate from the landfill is installed.

  In the vicinity of the dam 3, a water collection pit 4 for leachate via the water collection and drainage facility 12 is provided, and the water is sent to the leachate treatment facility 17 by a pump. Although not shown in the figure, a groundwater collection / drainage pipe is provided outside the impermeable work 11 so that rainwater and groundwater are not mixed into the leachate and collected in a regulating pond or the like.

  The final disposal site 10 is closed with firewood, etc. so that unspecified people cannot enter easily, so that various odorous gases generated from the landfill site are not leaked to the outside, and rainwater is not infiltrated. 2 is covered. The covering facility 2 is framed by steel pillars, and a metal plate-like body is arranged to be separated from the outside air.

  In addition, the structure of the covering facility 2 includes a ramen structure, an arch structure, a flat truss structure, a self-balanced hybrid structure combining a high-rigidity bending material and a high tensile strength cable, a space frame structure, a shell structure, and an air support structure. Various known support structures such as suspension structures can be used.

  A sprinkler constituting the sprinkler mechanism 13 is installed in the lower space of the covering facility 2, and water is sprinkled by the sprinkler mechanism 13 so that dust does not rise from the surface of the landfill and promotes microbial treatment of the landfill. It is comprised so that. The sprinkling mechanism 13 is connected to the water supply mechanism 6 that supplies treated water purified by the leachate treatment facility 17. In addition, it may replace with fixed facilities, such as a sprinkler, as the water spray mechanism 13, and may provide multiple water spray mechanisms which mounted a rain gun etc. in moving bodies, such as a vehicle. In the summer, when evaporation from the landfill is intense, only the treated water from the leachate treatment facility 17 is insufficient, and therefore well water and clean water may be used.

  In the final disposal site 10, specific organic waste, incinerated ash, waste plastic, slag, concrete scrap, glass scrap, ceramic scrap, slag, rubble scrap, etc. are carried and landfilled. Specified organic waste means organic sludge with a heat loss reduction of 15% or more, specifically sewage sludge, septic tank sludge, food waste, food residues generated in food factories, etc., or mixtures thereof Is included.

  Various types of waste brought in by truck are classified into specific organic waste, crushed waste plastic and / or waste gypsum board that can be used as breathable modifiers, and other waste. After the waste and the air permeability modifier are mixed, they are landed on the impermeable work 11 in order from the end of the site.

  Covering soil 23 is applied each time a certain amount of the specific organic waste mixed with the air permeability modifier is landfilled, and further new waste is landfilled thereon. When the upper limit is reached, final covering 23 is applied. . A vent pipe 21 is installed in the lowermost layer or in the lower part of each layer 22 to vent the specific organic waste.

  Other waste such as incineration ash, slag, concrete scrap, glass scrap, ceramic scrap, slag, rubble scrap, etc., is separated from the above-mentioned specific organic waste landfill layer (not shown in Fig. 1) ).

That is, the method for promoting stabilization of organic waste landfilled at the final disposal site includes a breathable modifier mixing step of mixing a breathable modifier with a specific organic waste having a thermal loss of 15% or more, and And an aeration step for aerating the deposited layer of the specific organic waste mixed with the air permeability modifier.

  The specific organic waste mixed with the breathable modifier in the breathable modifier mixing step may be immediately refilled in the final disposal site, and the ventilation step may be executed. The aeration step may be performed on a small amount of the specific organic waste in the pretreatment facility before being landfilled, and then landed in the final disposal site, and further the aeration step may be performed.

  In the breathable modifier mixing step, the breathable modifier in an amount that increases the air permeability coefficient φ obtained by Formula 1 by at least 50% to the specific organic waste than the value when the breathable modifier is not mixed. Are mixed. Waste plastics and / or waste gypsum boards that have been crushed are effectively used as the breathable modifier.

Formula 1: φ = (σ · d) / (p · s)
φ is an air permeability coefficient (L · cm / min · kP · cm ² ), σ is a flow rate (L / min), p is an input / output differential pressure (kP), s is a cross-sectional area (cm ² ), and d is a length (Cm)

In the aeration step, the aeration amount of 5 to ³⁰ L / (min. · M ³ ), preferably 15 to 30 L / p, is passed through the ventilation pipe 21 to the deposited layer of the specific organic waste mixed with the air permeability modifier. Air is supplied with an air flow rate of (min. · M ³ ).

Hereinafter, another embodiment of the present invention will be described.
In the above-described embodiment, the mode in which the ventilation step is performed after the specific organic waste mixed with the breathable modifier in the breathable modifier mixing step is embedded in the final disposal site 10 has been described. It is also possible to adopt a mode in which the aeration step is performed before the specific organic waste mixed with the property modifier is embedded in the final disposal site 10.

  By performing the aeration step, the specific organic waste containing the ammonia component is efficiently nitrified by the aerobic microorganism. And the denitrification process comes to be promoted in an anaerobic atmosphere by performing the landfilling step of landfilling the specific organic waste subjected to nitrification in the final disposal site. In this case, it is not necessary to install the vent pipe 21 in the landfill layer.

As shown in FIG. 2 (a), let σ be the amount of air that flows when a differential pressure p of entry / exit is applied to an air passage of length d having a constant area s. Assuming that the volume change of the air with respect to the viscosity and pressure change of the air is negligible, Formula 2 is established. φ is a proportionality constant. By defining the proportionality constant φ as the air permeability coefficient and modifying Equation 2, Equation 1 described above can be obtained.
Formula 2: σ = φ · p · s / d (L / min.)

  As shown in FIG. 2 (b), the casting cylinder 30 having a diameter of 250 mm and a height of 127 mm is closed by upper and lower lid bodies 33a and 33b having ventilation pipes 32a and 32b attached to both ends via a ventilation mesh 31. A breathability test was conducted using a test apparatus. This device is a modified version of a device commonly used to measure soil permeability.

  A mixture of specific organic waste and air permeability modifier (hereinafter referred to as “test waste”) is filled into the casting cylindrical body 30 and air is supplied from the air pipe 32b of the lower lid 33b. The amount of air flowing out from the vent pipe 32a of the upper lid 33a is measured. Before filling the mixture, it is necessary to measure in advance pressure loss caused by the flow meter, the cast cylindrical body 30, the vent pipes 32a, 32b, etc., and subtract and correct from the actual measurement value.

  Since the air permeability of the test waste to be filled in the casting cylindrical body 30 varies greatly depending on the compaction state, it is compacted so as to have the same weight as the landfill pretreatment facility model shown in FIG. . In addition, the air permeability coefficient calculated by Formula 1 does not depend on the compacted state of the test waste, the size of the test apparatus, or the like. In the test apparatus, the output is the atmospheric pressure, and the input is the indicated value of the pressure gauge, and the input / output differential pressure p is the difference between them.

Specifically, the landfill pretreatment facility model is filled with organic waste with a thickness of 1.0 to 1.5m, vented from below, sprinkled to the extent that it does not dry, and stabilizes organic matter before landfill. It is a model facility that promotes the transformation. When the waste is filled with a thickness of 1.0 to 1.5 m, the load capacity is 9.8 to 14.7 kN / m ² (0.1 to 0.15 kgf / cm, assuming that the unit volume weight is 1 t / m ^{3. 2} ).

This is almost the same as the load of 12.5 kN / m ² (0.127 kgf / cm ² ) when a rammer having a diameter of 5 cm and a weight of 2.5 kg is left standing, so that 2.5 kg is placed on the upper surface of the test waste. It was compacted by a simple operation of placing a rammer. In the experiment, the height of 127 mm was divided into three layers and compacted by a method of placing the rammers evenly in a plane (a method of placing lambs one by two).

  Waste plastic, waste gypsum board, incineration ash (Company A), incineration ash (Company B), incineration ash (Company C), incombustible crushed material, and molten slag as organic sludge FIG. 3B shows the result of the air permeability test performed by mixing 30% by volume. From FIG. 3 (b), it was found that waste plastic and waste gypsum board are suitable as the air permeability modifier. In addition, FIG.3 (b) is the data normalized by the highest value among the measured values of each air permeability coefficient.

  Next, prepare organic sludge and multiple types of test waste in which waste plastic, waste gypsum board or incinerated ash is mixed with organic sludge, and use the above-mentioned test equipment to test air permeability. Was done. FIG. 4 (a) shows the composition of the test waste.

In the test apparatus, if the flow rate of air to be ventilated is small, an error due to a flow meter or the like becomes large. The experiment was conducted with the value of. When this is converted into the amount of ventilation per 1 m ³ of organic sludge, it becomes 960 L / m ³ , and when the amount of ventilation to the organic waste of the landfill pretreatment model is 5 to 30 L (min. · M ³ ) Corresponds to several hundred times the flow rate.

  As shown in FIGS. 4B and 4C, when at least 5% by volume of waste plastic and waste gypsum board is mixed with organic sludge, it is confirmed that the air permeability coefficient is increased by 50% from the organic sludge alone. It was. In addition, it is thought that the reason why the fuel shell is flat between the mixing ratios of 5 to 10% by volume is that the unit weight increases when the volume is increased from 5% to 10% by volume. This trend will not change even if

  Next, organic sludge, test waste made by mixing 5% by volume of waste plastic or waste gypsum board with organic sludge is prepared and filled in the test apparatus shown in FIG. 5 (hereinafter referred to as “lysimeter”). And the confirmation test of the stabilization tendency of organic sludge was conducted. FIG. 6A shows the composition of eight types of test waste.

  The lysimeter 40 includes a cylindrical container 41 having a diameter of 300 mm and a length of 1000 mm, a bottom portion 42 formed on an inclined bottom surface, a drain pipe 43 disposed on the bottom portion, and a heat insulating sheet 54 that covers the cylindrical container 41. It is configured. A crushed stone layer 46 having a minimum thickness of 100 mm is formed on the bottom 42, an air diffuser 44 is installed at the center in the thickness direction, and air from the air pump 45 is supplied into the cylindrical container 41 through the air diffuser 44. It is configured as follows. A flow meter 47 for measuring the amount of air supplied from the air diffuser 44, a temperature sensor 48 for measuring the temperature of the upper region of the test waste filled in the cylindrical container 41, and a temperature sensor 49 for measuring the temperature of the lower region. Is provided.

  Each test waste was filled in the upper portion of the crushed stone layer 46 at the filling amount shown in FIG. 6B, and after draining at predetermined intervals according to the experimental schedule shown in FIG. 6C, the drain pipe 43 was prepared. The valve was opened and leachate was collected and analyzed for its composition. In addition, water was sprayed to each test waste at a liquid-solid ratio of 0.1 (sprinkling amount of about 7 L) for the first time and at a liquid-solid ratio of 0.033 (watering amount of about 2.3 L) for the second and subsequent times. In addition, when each test waste was filled into eight lysimeters, it was filled in about 10 times, and each time it was compacted with the own weight of the ramma. The sludge filling height is 1.0 mH.

Experiment No. B-0 is a test waste containing only organic sludge and has an air flow rate of 0. Experiment No. WP5-0 to WP5-30 are test wastes in which 5% by volume of waste plastic is mixed with organic sludge, and the ventilation rate is assigned to 0, 15, 30 L / m ³ . Experiment No. PC5-0 to PC5-30 are test wastes in which 5% by volume of waste gypsum board is mixed with organic sludge, and the ventilation rate is assigned to 0, 5, 15, 30 L / m ³ . Note that the lysimeter 40 with zero air flow releases the valve provided in the drain pipe 43 to a semi-aerobic state in which natural air inflow from the drain pipe is allowed, and other lysimeters 40 are connected to the drain pipe 43. The provided valve was closed and a predetermined amount of air was supplied from the air diffuser 44.

  104 days after the start of the experiment, a sample for dissolution test was taken out from the center of a region 10 cm from the topsoil in the lysimeter 40.

  FIGS. 7A and 7B show the BOD dissolution test results of organic waste before and after the start of the experiment. The concentration of B-0 increased after the end of the experiment, whereas the concentration of organic waste mixed with 5% by volume of waste plastic or waste gypsum board decreased. This is because air permeability was improved by mixing the waste and BOD was quickly decomposed.

7C and 7D show the COD dissolution test results of organic waste before and after the start of the experiment. When aeration was applied to waste plastic and waste gypsum board at 15 L / min · m ³ or more, the COD after the experiment was higher than that at the start of the experiment. It is presumed that by performing aeration, the polymer-like hard-to-decompose organic matter was decomposed to lower the molecular weight and detected as COD. When the polymer-like hardly decomposable organic substance is reduced in molecular weight, it becomes an easily decomposable organic substance and promotes decomposition.

FIGS. 7E and 7F show the TN (total nitrogen) elution test results of the organic waste before and after the start of the experiment. Similarly to COD, TN was confirmed to show a higher value after the end of the experiment than before the start of the experiment when aeration of 15 L / min · m ³ or more was applied. It is presumed that the concentration became higher as a result of detection of TN as the molecular weight decreased due to aeration.

  8A and 8B show the BOD analysis results of the leachate. It was confirmed that all test wastes had a decrease in BOD immediately after the start of the experiment. In particular, it was confirmed that the test waste having an air flow rate of 15 L / min or more rapidly and stably decreases in both the waste plastic and the waste gypsum board.

  FIGS. 8C and 8D show the COD analysis results of the leachate. For both waste plastic and waste gypsum board, the test waste with an air flow rate of 15 L / min or higher had higher COD of leachate than the test waste without air flow. It is presumed that the concentration was increased because the polymer substance was reduced in molecular weight by aeration and became easier to solubilize in the leachate.

  FIGS. 8E and 8F show the TN analysis results of leachate. Similar to COD, the test waste with an air flow rate of 15 L / min or higher had a higher TN than the sample with no air flow.

  As a result of the above, for the specific organic waste whose thermal loss is 15% or more, the amount by which the air permeability coefficient φ obtained by Equation 1 is increased by at least 50% from the value in the case of not mixing the air permeability modifier It was found that the stabilization of specific organic waste by aeration can be promoted by mixing the air permeability modifier.

  Waste plastic and waste gypsum board crushed to a particle size of several millimeters to several tens of millimeters can be suitably used as the air permeability modifier, but even if other than these, the air permeability coefficient φ determined by Equation 1 is By mixing the air permeability modifier in an amount that is at least 50% higher than the value when the air permeability modifier is not mixed, stabilization of the specific organic waste by aeration can be promoted.

  Further, at that time, it was found that the stabilization of the specific organic waste with improved air permeability is effectively promoted by setting the air flow rate to 5 to 30 L / min. And it was guessed that decomposition | disassembly of a hardly decomposable organic substance is accelerated | stimulated further by setting air flow rate to 15-30 L / min.

  FIGS. 9A and 9B show the results of analysis by the nitrogen summation method of the leachate of the test waste WP5-30. FIG. 9A shows the respective forms of nitrogen in FIG. 9B in proportion. When aeration was performed, the ratio of nitrate nitrogen increased, the ratio of ammonia nitrogen decreased, and it was confirmed that nitrification with aerobic microorganisms was progressing. From this figure, new knowledge was obtained that denitrification can be performed in the landfill layer if the aeration is stopped and anaerobic at the stage of advanced nitrification.

That is, for a specific organic waste having a thermal loss of 15% or more, the air permeability is increased by at least 50% from the value when the air permeability coefficient φ obtained by Equation 1 is not mixed with the air permeability modifier. the final mixing step of mixing sex modifier, a ventilation step of venting the deposition layer of the particular organic waste breathable modifier is mixed, the specific organic waste which has been nitrified breathable step By implementing a method for promoting the stabilization of organic waste, including the landfill step of landfilling at the disposal site, denitrification treatment is promoted under certain anaerobic conditions for the specific organic waste landfilled at the final disposal site. Become so.

The test apparatus for measuring the air permeability coefficient φ is not limited to the test apparatus having the structure described above. The weight for compacting the waste during the measurement is preferably 0.1 to 0.15 kgf / cm ² when the above-mentioned landfill pretreatment facility model is used as a reference, but when a different landfill pretreatment facility model is adopted. May be set accordingly. That is, the air permeability coefficient φ may be measured in a state of being compacted according to the conditions for normal landfilling.

  Each of the embodiments described above is only an example of the present invention, and the technical scope of the present invention is not limited by the description, and the specific configuration of each part exhibits the effects of the present invention. Needless to say, the design can be changed as appropriate within a range.

10: Final disposal site 11: Impervious work 12: Drainage / drainage facility 13: Sprinkling mechanism 14: Suction device 17: Leaching water treatment mechanism 21: Vent pipe 22: Landfill layer 23: Covering soil

Claims (5)

A method for promoting stabilization of organic waste landfilled at a final disposal site,
For specific organic wastes with a thermal loss reduction of 15% or more, the air permeability is improved by an amount at least 50% higher than the value obtained when the air permeability modifier φ obtained by Equation 1 is not mixed with the air permeability modifier. A breathable modifier mixing step for mixing the material;
An aeration step for venting a layer of a specific organic waste mixed with an air permeability modifier;
With
The organic waste further includes a landfill step in which the specific organic waste that has been nitrified in the aeration step is reclaimed in the final disposal site, which is executed in the deposition layer of the specific organic waste before the aeration step is landfilled in the final disposal site Stabilization promotion method.
Formula 1: φ = (σ · d) / (p · s)
φ is an air permeability coefficient (L · cm / min · kP · cm ² ), σ is a flow rate (L / min), p is an input / output differential pressure (kP), s is a cross-sectional area (cm ² ), and d is a length (Cm) 2. The organic waste according to claim 1, wherein the air permeability modifier mixing step is a step of mixing waste plastic and / or waste gypsum board that has been crushed as the air permeability modifier with a specific organic waste. Stabilization promotion method. Said vent step, the deposition layer of the particular organic waste breathable modifier is mixed 5~30L / (min. · M 3 ) according to claim 1 or 2, wherein the step of venting aeration amount of Method for promoting stabilization of organic waste. 4. The organic material according to claim 3 , wherein the aeration step is a step of aeration with a ventilation amount of 15 to 30 L / (min. · M ³ ) through a deposition layer of the specific organic waste mixed with the air permeability modifier. Waste stabilization promotion method. The method for promoting stabilization of organic waste according to any one of claims 1 to 4 , wherein the specific organic waste contains organic sludge, garbage and / or food residue.

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