JP2005279525A - Stabilization treatment method and treatment site for incineration ash waste - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stabilization treatment method for incineration ash waste in a waste landfill disposal site by which the waste is stabilized in an early stage and equipment costs and management costs for leachate treatment can be reduced. <P>SOLUTION: The stabilization treatment method for the incineration ash waste is provided for removing hazardous substance, or the like, in the waste by eluting them into leachate caused by rainfall or watering to the incineration ash waste, wherein the method includes, as the treatment steps, a ripening step of ripening the incineration ash waste discharged from incineration ash waste generating facilities in the state of being stacked for two weeks or longer, a landfill step of performing the landfill disposal of the ripened incineration ash waste, and a stabilization step of stabilizing the incineration ash waste subjected to the landfill disposal, and the incineration ash waste is treated in the steps. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention promotes stabilization of incineration ash waste at the final disposal site for incineration ash waste (including covered final disposal site), and stabilizes incineration ash waste to enable early reuse of the disposal site The present invention relates to a processing method and a processing place.

The final disposal site for incineration ash is usually full in about 15 years. However, in order to abolish the final disposal site for incineration ash and make full-scale use of the land, the above landfill site should be the following (1) to (3 ) And satisfying the main abolition conditions are required.
(1) The property of retained water, etc. has reached the drainage standard value (at the installation permission stage) for more than 2 years.
(2) There is almost no gas generation, and no increase in gas generation is observed for more than two years.
(3) The internal temperature of the landfill is not abnormally high compared to the surrounding underground temperature.

  Conventionally combustible materials that cannot be recycled are incinerated in an incinerator, and the incinerator residue is discharged as incinerated ash. The discharged incineration ash is carried and dumped to the final disposal site by truck within a period of several days from the same day.

  The incinerated ash dumped at the final disposal site is spread and rolled up to a layer thickness of about 3m to several meters with a shovel car or bulldozer. In this case, for example, in order to prevent the incineration ash from being scattered from the surface or the odor from diffusing every time when the separation work is finished in each layer of 3 m of the waste layer, 0.2 to 0.5 m as an environmental measure. Cover the soil with a thick covering.

  In open-type disposal sites, incinerated ash landfilled in this way is washed out by salt, heavy metals, and other harmful substances (hereinafter collectively referred to as hazardous substances) due to natural precipitation such as rainwater. The infusion ash is stabilized while the leachate obtained by elution into the water is treated by a series of water treatment facilities.

  On the other hand, in some covered final disposal sites that cover landfills with structures, instead of natural precipitation, water is forcibly sprayed into incineration ash. Next, harmful substances and the like are washed out from the incinerated ash, eluted into the leachate, and treated by a series of water treatment facilities to stabilize the incinerated ash.

  In either case of these open type disposal sites or covered final disposal sites, washing out by rain or watering is performed without a period of time after the incinerated ash is dumped in the disposal site. That is, it does not go through a process of allowing the incineration ash to be stored in a stationary manner after the incineration ash is dumped until it is washed out.

  On the other hand, there are also facilities that do not or hardly sprinkle water in some of the covered final disposal sites. However, these substances do not detect harmful substances in the waste, and cannot be stabilized and may require semi-permanent management.

  Further, for example, Patent Document 1 discloses a waste landfill treatment method in which cleaning water is fed from the bottom of a waste landfill layer at a waste final disposal site.

  In this waste landfill treatment method, the waste landfill layer is filled with cleaning water from the bottom, and the contaminants contained in the waste are separated and discharged by the upward flow of the cleaning water. Water (leached water) from which the pollutants are separated and discharged is collected from the upper part of the landfill layer, and the pollutants are removed by a water treatment facility to obtain treated water. The treated water is again circulated and reused as washing water to remove the contaminants in the landfill layer. Furthermore, it is disclosed that air is fed into the landfill layer simultaneously with the feeding of the washing water. However, this method increases the maintenance and management costs due to the large equipment used in water treatment.

  In order for the final landfill site for incineration ash to be reusable as soon as possible, the conditions for decommissioning the final landfill site must be met. This abolition condition requires early stabilization. In order to achieve early stabilization, the more precipitation or watering, the more effective. However, as the amount of water and leachables increase, the leachate treatment facility becomes larger. Furthermore, the maintenance cost of the processing equipment increases.

Therefore, there is a conflict between early stabilization, equipment costs, and management costs, and no solution has been made. That is, either the equipment cost and the maintenance cost are suppressed at the expense of early stabilization, or the early stabilization is promoted at the expense of cost.
JP-A-11-179316 (Claims, paragraph numbers [0006] to [0008])

  While the present inventors have been variously studied to solve the above conflicting problems, an aging step of aging the incinerated ash waste discharged from the waste incineration facility etc. while being stacked for a predetermined period; and Stabilization of incineration ash waste by landfilling process for landfill disposal of the aged incineration ash waste and stabilization process for stabilizing the landfilled incineration ash waste It was found that elution of toxic substances in the leachate due to rainfall and washing out of the water can be suppressed and early stabilization is promoted.

  In addition, the present inventors provide an initial washing step for washing out harmful substances from the incinerated ash by rain and watering between the ripening step and the landfilling step, so that the amount of elution into the leachate at the initial washing step It was found that the amount of leachate leached into the leachate at the stabilization stage of incinerated ash waste landfilled was further reduced.

  In addition, the moisture content and deposition state of incinerated ash waste in the aging process are set to the specified conditions, and the improvement effect on stabilization of incinerated ash waste and elution of harmful substances in leachate is further enhanced. The inventors have found and have completed the present invention.

  Therefore, an object of the present invention is to provide a stabilization method and a treatment plant for incineration ash waste that solves the above-described problems.

  The present invention for achieving the above object is as follows.

  [1] An aging process in which the incinerated ash waste discharged from the incineration ash waste generation facility is aged in an open-type waste landfill site or a covered-type waste landfill site for two weeks or more, and Landfilling process for landfilling incinerated ash waste that has been aged, and incinerated ash waste that is removed by leaching or spraying the landfilled incinerated ash waste to elute and remove harmful substances in the leachate The stabilization method of the incineration ash waste which has the stabilization process of.

  [2] Stabilization of incineration ash waste as set forth in [1] having an initial washing step in which the incineration ash waste is washed by rain or watering during the aging step to the landfill step Processing method.

  [3] The stabilization method for incineration ash waste according to [1] or [2], wherein the incineration ash waste is kept at a moisture content of 10 to 30% by mass in the aging step.

  [4] The accumulated state of the incinerated ash waste in the aging process is deposited without being pressed by heavy machinery or the like when the incinerated ash waste is carried in. [1] to [3] The stabilization method of the incineration ash waste of description.

  [5] An aging process in which the incinerated ash waste discharged from the incineration ash waste generation facility is aged in an open-type waste landfill site or a covered-type waste landfill site for two weeks or more, and Landfilling process for landfilling incinerated ash waste that has been aged, and incinerated ash waste that is removed by leaching or spraying the landfilled incinerated ash waste to elute and remove harmful substances in the leachate Stabilization of the incineration ash waste including the initial washing process in which the incineration ash waste is rained or sprinkled with water during the aging process to the landfill process. It is a treatment site that performs treatment, and in the open type waste landfill site or in the covered type waste landfill site, the maturation area in which the maturation process and the initial washing process are performed, the landfill process, and the stabilization process process are performed. Divided into landfill areas Stabilization treatment plant ash waste consisting of Te.

  The stabilization method for incinerated ash waste of the present invention includes an aging step of aging the incinerated ash waste discharged from the incineration ash waste generating facility while being stacked for a predetermined period, and the aged incinerated ash waste Since it has a landfill process that performs landfill disposal and a stabilization process that stabilizes the incinerated ash waste that has been disposed of in landfill, it is possible to suppress the increase in the size of leachate treatment equipment and reduce equipment costs and management costs. The absolute amount of elution of substances and the like can be suppressed, and early stabilization is promoted.

  When toxic substances are washed out from incineration ash by rain or watering between the ripening process and the landfill process, the amount of leachate in the leachate at the initial washing stage is small, and the incineration ash waste disposed at landfill is stable. The amount of elution into the leachate at the crystallization treatment stage can be further reduced.

  When the moisture content and accumulation state of the incinerated ash waste in the aging process are set to predetermined conditions, the improvement effect on stabilization of the incinerated ash waste and elution of harmful substances in the leachate is further enhanced.

  Incineration by incineration of the incineration ash waste stabilization treatment plant by dividing it into an aging area that performs the aging process and initial washing process, and a landfill area that performs the landfill process and stabilization process The stabilization treatment of ash waste can be performed efficiently.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic plan view showing an example of the incineration ash waste stabilization treatment plant of the present invention. FIG. 2 is a schematic diagram showing a side cross-sectional view in which the cross-sectional portion is a cross-sectional portion corresponding to the cross section XX in FIG. The waste landfill site shown in this example is a model of a covered-type waste landfill site that has a roof, etc., and prevents direct rainwater from hitting the incineration ash waste. It may be an open type (outdoor type) waste landfill without a roof.

  The incineration ash waste carried out from the incinerator is carried into the aging area (A1) by a truck or the like. The incinerated ash waste carried into the aging area (A1) is piled up with a shovel car or a bulldozer, leveled (normalized), and stored at rest for more than two weeks before entering the aging process.

  The next incineration ash waste cannot be carried into the aging area (A1) that has entered the aging process. Therefore, the next incineration ash waste is carried into the aging area (A2). Thereafter, the incinerated ash waste in the aging area (A2) is stored at least for two weeks in the same manner as in the aging area (A1) and enters the aging process.

  When the aging area (A2) enters the aging process, the aging area (A1) must be vacant. That is, since the aging areas (A1) and (A2) are used alternately, the capacity of the aging area must be determined based on the amount of incinerated ash to be carried. Note that the aging area may be expanded on the assumption that the amount of incinerated ash waste increases and the aging area is not available.

  After completion of the aging process, if necessary, the initial washing process is entered, and the incinerated ash is continuously stored in the aging area (A1) and exposed to precipitation such as rainfall and watering. As a result, substances such as harmful substances in the incinerated ash waste are efficiently eluted into the leachate, and effective washing out is performed. However, the absolute amount of the contained material is less than that by the conventional method which does not mature.

  The incinerated ash waste that has completed the initial washing process is moved from the aging area (A1) to the landfill area (B) by a shovel car or a bulldozer, and enters a landfill process in which it is stacked while rolling.

  The incinerated ash waste landfilled in the landfill area (B) enters the stabilization process, and the incinerated ash waste is washed out by rain or watering. As a result, the contained substances are removed and eluted from the incinerated ash waste into the leachate, and the incinerated ash waste is stabilized. Hereinafter, each step will be described in more detail.

(Aging process)
In the stabilization method of incineration ash waste of this example, the aging step is to carry the incineration ash waste into the provided aging areas (A1) and (A2) before the landfill treatment of the incineration ash waste, Stack, level, and store for at least two weeks. The longer the aging period is, the more effective it is, and at least two weeks or more in which a change in the amount of elution of harmful substances is confirmed is necessary. Furthermore, one month or more in which the reduction of the elution amount becomes clear is preferable. However, the longer the ripening period is, the more the area is secured or the management cost increases, so the aging period is limited to 12 months when the increase in the effect cannot be expected so much.

  In the aging process, ripening measures against incineration ash waste, such as by installing the aging area (A1), (A2) indoors, or covering the incineration ash waste with a cover such as a sheet, etc. even outdoors It is preferable to take measures against scattering. It is preferable to store the product after taking such measures.

  In order to maintain an effective aging process, it is preferable to maintain and manage an appropriate temperature, an appropriate water content, and an appropriate air permeability for the incinerated ash waste during stationary storage. That is, the target aging effect can be obtained by causing a chemical reaction and solidifying calcium (content is preferably 5 to 15% by mass) in the incinerated ash waste in the aging step.

  The moisture content in the incinerated ash waste in the aging step is preferably maintained at 10 to 30% by mass. When the water content is less than 10% by mass, the scattering of the incinerated ash waste on the surface increases. Moreover, when a moisture content exceeds 30 mass%, washing out from incineration ash waste will arise in an aging process, and an aging effect will fall. If the moisture content falls below 10% by mass, the amount of water sprayed to the extent that washing is not performed to increase the moisture content, the moisture content is increased, and the incinerated ash waste is scattered. It is preferable to prevent this.

  The temperature of the incinerated ash waste during the aging period is preferably 10 ° C or higher, more preferably 20 to 50 ° C. When the temperature of the incinerated ash waste is less than 10 ° C, the stabilization of the incinerated ash is difficult to proceed, and when it exceeds 50 ° C, the working environment is deteriorated.

  Regarding the maintenance of air permeability in the incineration ash waste accumulation layer for effective aging, the incineration ash waste is deposited, piled up and leveled without being compressed by heavy machinery, etc. It is preferable.

  For this air permeability, in the aging step, the layer thickness of the incinerated ash waste is preferably 2 m or less, more preferably 0.2 m to 2 m. If the layer thickness is less than 0.2 m, it is difficult to secure an aging area. If the layer thickness exceeds 2 m, the air permeability due to natural ventilation is poor and the flooring is difficult. However, if the air permeability in the incinerated ash waste accumulation layer can be ensured by some means by forced ventilation or the like, there is no problem even if the layer thickness exceeds 2 m.

  Effective aging is performed by the following process. Incinerated ash contains a lot of calcium such as quicklime and slaked lime. These calciums are known to undergo a chemical reaction due to the presence of moisture and carbon dioxide (existing in the atmosphere) and become solidified as calcium carbonate.

  Therefore, in the aging process, by maintaining moisture in the incineration ash and ensuring ventilation, a mild chemical reaction of calcium occurs and calcium carbonate is generated. As the calcium carbonate solidifies, harmful substances and the like are taken into the calcium carbonate and immobilized. For this reason, it is considered that the elution of harmful substances and the like into the leachate of the incinerated ash leached by watering or the like is suppressed.

(Initial washing process)
As described above, the incineration ash waste is subjected to an aging process, so that elution of calcium and harmful substances is suppressed. That is, through the aging step, the maximum elution amount in the initial washing step from the incinerated ash is suppressed, and the total elution amount is also suppressed. However, even incinerated ash after aging, components that are easily eluted due to precipitation remain.

  Therefore, after completion of the aging process, if necessary, the initial washing process is entered, and the incinerated ash waste that has been carried, stacked and spread in the aging areas (A1) and (A2) is continuously stored, Exposure to rain such as watering.

  By this initial washing step, the contained substances in the incineration ash are efficiently eluted in the leachate, and effective washing can be performed. That is, in order to stabilize the incineration ash waste at an earlier stage, it is preferable to elute harmful substances and the like in a shorter period of time.

  Specifically, in the initial washing process, the incinerated ash waste in the aging areas (A1) and (A2) is stored without being compressed as necessary in the aging process of the previous process. The material contained in the incineration ash is easily deposited.

  Further, the incinerated ash waste in the ripening areas (A1) and (A2) is thinner than the incinerated ash waste buried in the landfill area (B). Therefore, due to the uniform contact between the incinerated ash and water, not only easily soluble salts such as sodium salt and potassium salt due to a small amount of rainfall or water spray, It is washed out earlier.

  As described above, it is effective to perform initial washing by watering or raining in the aging areas (A1) and (A2) in a state where the contained substances in the incinerated ash after the aging process are easily eluted. Also, the incineration ash waste after the ripening process is more harmful than the incineration ash waste landfilled in the landfill area (B) in the next landfill process, with a smaller amount of rainfall or water spray. Etc. can be eluted.

  The leachate generated in the initial washing process is treated at a water treatment facility. This water treatment facility may also be used in the stabilization process after the landfill process, or may be provided alone. Water treated in a water treatment facility can be used as circulating water for watering in an initial washing process, a stabilization process, or the like. For this sprinkling, fresh water from other water sources may be used, but a stable and inexpensive water source can be secured by using the treated water of the water treatment facility.

  By introducing an initial washing process between the ripening process and the landfill process, the incineration was washed out on the incineration ash waste already stabilized in the landfill area (B). Even if ash waste is stacked, the pollution of harmful substances from this new incineration ash waste is kept to a minimum. Thereby, stabilization of the incinerated ash waste in the landfill area (B) can be further promoted.

  In addition, a heavy metal stabilizer such as a chelating agent may be sprayed on the incinerated ash by watering or the like before reaching the landfill process through the aging process. Stabilization can be further promoted by bringing the heavy metal stabilizer into contact with the incinerated ash.

(Landfill process)
In the landfill process, the incineration ash waste is landfilled as in the past, and the incineration ash waste is moved to the landfill area and spread with a thick layer of about 3m to several meters with a shovel car or bulldozer. , Stack while rolling. As an environmental measure to prevent odors from diffusing from the surface, laying and covering with earth and sand with a thickness of 0.3m to 0.5m as necessary, or aging area (A1), (A2), landfill area (B), etc. are closed disposal sites that are covered with structures.

(Stabilization process)
In the stabilization process, the incineration ash waste is washed out by rain or watering, as is conventionally done, and harmful substances contained in the incineration ash are eluted in the leachate and removed from the incineration ash. Furthermore, harmful substances contained in the leachate are removed using a treatment facility and stabilized.

  The aging area can be one section, but considering the aging period, it is preferable to divide into a plurality of areas as in the above embodiment. Although the initial washing step can be omitted, it is preferable to carry out the initial washing step because the washing out effect of harmful substances such as salts is remarkable.

  As in the covered-type waste landfill site shown in FIGS. 1 and 2, an aging area may be provided in the covered-type waste landfill site. It is possible to stabilize the above incineration ash waste at an early stage by providing a space for the maturation area that is not exposed to rain water separately from the covered waste landfill site, and even if the covered waste landfill site is only the landfill area. It is.

  In other words, an aging area is set up in a place different from the covered-type waste landfill site, the aging process and the initial washing process are performed in the aging area, and then it is carried into the covered-type waste landfill site for landfilling and stabilization. A chemical conversion treatment step may be performed.

  It is also possible to introduce the stabilization method for incineration ash waste by providing an aging period for incineration ash by providing an aging area that is not exposed to rainwater even in an open-type waste landfill site. .

  Hereinafter, the present invention will be specifically described by way of examples.

(Test Examples 1-8 and Comparative Test Examples 1-2)
In order to examine the degree of aging of the incinerated ash, the plastic bottle tests of Test Examples 1 to 8 and Comparative Test Examples 1 and 2 shown below were performed.

  Test method: Incineration ash discharged from the incinerator of the incineration ash waste generation facility is filled into a 300 ml plastic container so that the specific gravity is 1.5, and the inner lid and outer lid are closed and sealed. Table 1 It was stored under the conditions of temperature, moisture and moisture shown in.

  Evaluation method: The contents of the plastic bottle after a predetermined period of time were taken out, and a dissolution test was conducted in accordance with Notification No. 13 of the Environment Agency. The properties of the obtained eluate were investigated and the effect of reducing the elution amount was evaluated. Table 1 shows the measurement values of the evaluation items: Ca, Pb, and conductivity.

  Ca: Calcium is an item that serves as an index of elution reduction by aging. The decrease in the amount of calcium elution suggests that various eluates (especially heavy metals) have changed to a state in which elution is difficult to elute due to solidification of the landfill, etc., suggesting that stabilization has progressed. In Test Examples 1 to 8 and Comparative Test Examples 1 and 2, the measurement was performed as an index of stabilization from the change in the elution state of the readily soluble salt.

  Pb: Lead is one of the heavy metals most likely to exceed the drainage standard value among the heavy metals contained in the leachate. In the plastic bottle test conducted separately, the elution tendency of lead was the same as the elution tendency of other heavy metals, and in Test Examples 1 to 8 and Comparative Test Examples 1 and 2, it was measured as an index for reducing heavy metal elution.

  Conductivity: The conductivity is a value that increases almost in proportion to the mass% of dissolved ions, and generally indicates 4 to 5 S / m for seawater. In Test Examples 1 to 8 and Comparative Test Examples 1 and 2, the measurement was performed as an index of stabilization from a change in dissolved state related to ions.

表１より以下のことがわかった。
(１)温度が２０℃より３０℃と高い方が熟成の進みが早い。
(２)Ｃａ及びＰｂは一時的に増加するが、３０日目以降低下する。
(３)導電率は日数と共に低下していく。
以上より熟成は日数と共に進んでいくことがわかった。

Table 1 shows the following.
(1) Maturation progresses faster when the temperature is higher than 30C.
(2) Ca and Pb increase temporarily, but decrease after the 30th day.
(3) The conductivity decreases with the number of days.
From the above, it was found that aging progressed with the number of days.

(Example 1)
The incineration ash discharged in the incinerator of the incineration ash waste generation facility, which is the incineration ash used in the plastic bottle test of Test Examples 1 to 8 and Comparative Test Examples 1 to 2, is divided into one section of the landfill area shown in FIGS. (B) The product was transported to a covered-type waste landfill site that was divided into three sections of ripening area 2 sections (A1, A2).

  The transported incineration ash was piled up on one aging area (A1) and spread. When the incineration ash is carried in, stacked, and leveled, rolling by heavy machinery is not performed. When the layer thickness of the incinerated ash accumulation layer reached 0.3 m, the carrying-in to the aging area (A1) was stopped and switched to the carrying-in to the other aging area (A2). The incinerated ash that reached the predetermined layer thickness in the aging area (A1) was kept for 20 to 25% by mass and aged for 60 days. The temperature of the incinerated ash during this aging period was 15 to 25 ° C.

  After the expiration of the aging period, initial washing was performed to wash out harmful substances in the incinerated ash. In this initial washing step, 27 liters / day of water per ton of incinerated ash was sprinkled with a watering facility provided in the aging area (A1). This sprinkling used circulating water from the covered waste landfill site. FIG. 3 shows the measurement results of Pb of leachate from the bottom of the incinerated ash accumulation layer after the start of the initial washing.

  The incinerated ash carried into the other aging area (A2) was also carried in, ripened and sprinkled in the same manner as in the aging area (A1). Thus, carrying in, aging, and watering were repeated alternately in the two aging areas (A1, A2).

(Comparative Example 1)
The incineration ash discharged in the incinerator of the incineration ash waste generation facility, which is the incineration ash used in the plastic bottle test of Test Examples 1 to 8 and Comparative Test Examples 1 to 2, is divided into one section of the landfill area shown in FIGS. (B) The product was transported to a covered-type waste landfill site that was divided into three sections of ripening area 2 sections (A1, A2).

  The incinerated ash was landfilled in the same manner as in Example 1 except that the incinerated ash transported to the covered-type waste landfill was subjected to the initial washing process directly without going through the aging process and moved to the landfill area (B). Stabilized. FIG. 3 shows the Pb concentration measurement result of the leachate from the bottom of the incinerated ash accumulation layer after the start of washing.

From FIG. 3, the following was found.
In Example 1, (1) the Pb concentration temporarily increases, but decreases after 30 days.
(2) The Pb concentration becomes stable after 70 days. Therefore, the initial washing period is preferably 30 days or longer, and more preferably 70 days or longer.
(3) In Comparative Example 1, the Pb concentration at the initial stage of watering is low. This seems to be insufficient moisture penetration. However, the Pb concentration increases rapidly after 50 days.
(4) About 100 days after watering, the Pb concentration of Example 1 is stable at a low concentration of 0.8 mg / L. The Pb concentration in Comparative Example 1 remained as high as 2 mg / L.

It is a schematic plan view which shows an example in the incineration ash waste stabilization treatment plant of this invention. It is the schematic which shows the side surface sectional drawing whose cross-sectional part is a cross-sectional part equivalent to the XX cross section in FIG. It is a graph which shows Pb density | concentration change from the washing | cleaning start in the leachate from the bottom of the incinerated ash accumulation layer of Example 1 and Comparative Example 1.

Explanation of symbols

A1, A2 Aging area B Landfill area

Claims (5)

Aging process for incineration ash waste discharged from the incineration ash waste generation facility in an open type waste landfill site or a covered type waste landfill site, and aged incineration for two weeks or more Landfilling process for landfill disposal of ash waste, and stabilization of incineration ash waste that removes by removing rainwater or sprinkling the landfilled incineration ash waste and leaching harmful substances in the waste into leachate A method for stabilizing incinerated ash waste having a process. The incineration ash waste stabilization method according to claim 1, further comprising an initial washing step in which the incineration ash waste is washed by rain or watering during the aging step to the landfill step. . The incineration ash waste stabilization method according to claim 1 or 2, wherein the incineration ash waste is aged while maintaining a moisture content of 10 to 30% by mass in the aging step. The incinerated ash waste according to any one of claims 1 to 3, wherein the accumulated state of the incinerated ash waste in the aging process is accumulated without being compressed by a heavy machine or the like when the incinerated ash waste is carried in. Stabilization method of things. Aging process for incineration ash waste discharged from the incineration ash waste generation facility in an open type waste landfill site or a covered type waste landfill site, and aged incineration for two weeks or more Landfilling process for landfill disposal of ash waste, and stabilization of incineration ash waste that removes by removing rainwater or sprinkling the landfilled incineration ash waste and leaching harmful substances in the waste into leachate The incineration ash waste is stabilized, including the initial washing process, in which the incineration ash waste is washed by rain or watering during the aging process and the landfill process. A treatment area, an aging area for performing an aging process and an initial washing process in an open-type waste landfill or a covered-type waste landfill, and a landfill area for performing a landfill process and a stabilization process Divided into Stabilization treatment plant of 却灰 waste.

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