JP2003001213A - Reclamation structure of waste and reclamation method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reclamation structure of waste and a reclamation method thereof which excludes to the utmost, such a danger that the seepage water generated from the waste which is buried in a controlled final disposal site contaminates the surrounding environment. SOLUTION: This reclamation structure of waste and reclamation method thereof is used for burying the waste by one step or successively over a plurality of steps in the upper direction at every partition formed by parting a hollow part for charging the waste with a partitioning dam. Therein, further, a drainage path is disposed on the normal surface of the hollow path and receives the rain water which falls on a temporary impervious sheet with which the waste in the partition which is already completed in reclamation is covered and flows thereinto and the rain water which falls on the partition which is not yet reclaimed and discharges the same into a disaster preventing adjustment pond, etc. Further, the seepage water which is generated by that the rain water which falls within the partition in reclamation is brought into contact with the waste is collected and is sent to waste collecting equipment. The treated water which is generated by the treatment with water treating equipment is sent to solar evaporating equipment, therein, the water content is evaporated and, at the same time, a nonvolatile content in the treated water is adsorbed onto a filter medium such as sand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a landfill structure and a landfill construction method for waste, more specifically, a product obtained by treating leachate generated in a managed final disposal site for landfilling waste, that is, suppressing the discharge of treated water as much as possible. The present invention relates to a waste landfill structure and a landfill construction method that are devised so as to reduce the load on the surrounding environment.

[0002]

2. Description of the Related Art Industrial waste, incinerator ash generated in an incinerator for incinerating combustible waste, or other waste (collectively referred to as "waste" hereinafter) is filled up in a conventional manner. In a managed final disposal site, contact between wastewater and rainwater produces water containing various harmful substances, that is, leachate, which is treated by a water treatment facility to perform coagulation-sedimentation treatment, biological treatment and activated carbon. Adsorption treatment or sharpening
After being sequentially subjected to adsorption treatment, etc., it becomes treated water of a quality that satisfies the discharge standards, and then discharged to rivers, etc. outside the area of the final disposal site.

[0003]

When the waste is treated in this way at the final disposal site of the waste, since the treated water contains trace amounts of harmful substances below the discharge standard concentration, However, there is a problem in that it cannot be said that there is no risk of pollution of the environment around the disposal site due to residual and accumulated hazardous substances. As consciousness becomes more and more sharp,
With regard to this landfill, more thorough measures are required to prevent harmful substances from landfill waste from contaminating the surrounding area.

[0004]

The present invention has been devised in view of the above-described situation, and it is possible to reduce the amount of treated water discharged from a managed final disposal site as much as possible, thereby landfilling. The purpose of the present invention is to provide a landfill structure and a landfill method that reduce the load of harmful substances caused by wastes on the surrounding environment as much as possible. The waste is filled up by one step or upward for each landfill section created by dividing the inside of the recessed part for waste input of the managed type final disposal site with a partition weir covered with a water blocking sheet. In the landfill structure for sequentially landfilling over a plurality of steps, in the slope of the recess, a drainage channel having a water guiding gradient for receiving rainwater in the recess and flowing down laterally on the slope. It is formed at a height commensurate with the landfill height of landfill waste determined according to the height of the partition dam,
On top of the landfill waste in the landfill area where landfill has been completed, a cover soil and a temporary impermeable sheet are laid for each landfill waste.
When waste is further landfilled on the laid temporary water-impervious sheet, the laid temporary water-impervious sheet is removed prior to the landfill, and the recessed portion is shielded. On the ground that has been water-worked, there are provided water collection pipes for separating leachate produced by contact between waste and rainwater and rainwater that does not come into contact with waste to drainage facilities, respectively. Outside the recess, a water treatment facility for treating the collected leachate, a sun evaporation facility and a forced evaporation facility for evaporating the treated water treated by this water treatment facility are provided, 1. The above-mentioned landfill structure, wherein the waste after the landfill is completed is covered with a capillary barrier. Waste is filled up at a controlled landfill site.Waste is thrown into each landfill section separated by a partition dam covered with a water-blocking sheet in the recess where the waste is thrown in. A method of landfilling waste in multiple steps in each landfill section from the lowest step to the top step, starting from the bottom step to the top step. 1) In the case of landfilling one or more steps Put the waste in a certain landfill section of the lowest stage,
Laying a cover soil and a temporary water-blocking sheet on the landfill waste in the landfill section where the landfill was completed to complete the landfill in this landfill section, and 2) and then the other one in the first step or the lowest step. Landfill of the landfill section of 1) is completed in the same manner as 1) above, and 3) Then, the same operation as 1) or 2) is repeated until the last landfill section of the above-mentioned steps, and the one or the lowest 4) When the landfill is completed, and 4) further landfilling is carried out over a plurality of stages, the temporary water shield sheet laid on the landfill section that has already been landfilled.
While sequentially peeling off the tortoises, the landfilling from the second and subsequent stages to the topmost stage is completed in the same manner as in steps 1) to 3) above, and 5) the landfill of all landfill sections is completed. A capillary-barrier is provided on the landfill waste at the upper part, and the water collecting pipe provided on the ground where the recessed portion is water-blocked is used, and the waste put in the landfill section being landfilled is The leachate produced by the contacted rainwater and the wastewater respectively receives the rainwater that flows down from the landfill that is not yet landfilled, and guides these leachate and rainwater to the drainage system in a state where they are isolated from each other. The leachate is treated with water treatment equipment to obtain treated water, and then this treated water is subjected to solar evaporation or forced evaporation, and at the drainage channel having a water guiding gradient for laterally flowing down rainwater on the slope. Temporary interruption It relates to the landfill method, characterized in that the rainwater received on the sheet, the rainwater flowing down along the slope and the rainwater guided to the collecting and drainage facility are discharged to the outside of the final disposal site. is there.

The present invention relates to a landfill structure and a landfill construction method of a final disposal site for landfilling waste that belongs to a management type, and according to the present invention, it is derived from contact between landfilled waste and rainwater. Since the amount of treated water generated by treating leachate to the outside of the final disposal site can be made as close to zero as possible, the treated water, and thus the landfilled waste, can be used around land and rivers. The risk of polluting the environment is thoroughly eliminated.

According to the conventional general management type final disposal site structure, in the landfill structure and the landfill method of the present invention,
First, in order to prevent seepage water from penetrating into the surrounding ground from the bottom and sides of the recessed part of the final disposal site, for example, laying a synthetic rubber or synthetic resin impervious sheet or asphalt or Water barriers using impermeable cohesive soil are applied to these bottoms and sides.

The landfill construction method of the present invention is as described in the above item 1. The procedure of this construction method will be more specifically described as follows, for example.

Regarding the first lowest step in the recess, a landfill section 1a, a landfill section 1b laterally adjacent to the landfill section 1a, and a landfill section 1c further laterally adjacent to the landfill section 1b are arranged in this order. In a landfill section consisting of one step up to the last landfill section 1n formed adjacently, or in the case of landfilling over a plurality of steps, it is then located above the first landfill section consisting of these landfill sections 1a to 1n. Regarding the second step, the final landfill section 2n is formed so as to be adjacent to the landfill section 2a, the landfill section 2b adjacent to the landfill section 2a in the lateral direction, and the landfill section 2c further adjacent to the landfill section 2b in the horizontal direction. And the landfill sections Na to Nn at the uppermost Nth stage in the order above
(However, N is an integer of 1 or 2 or more, and n is an integer of 2 or more.) When landfilling waste in each landfill in this order, 1) The landfill 1a and the landfill After the waste is put into the landfill section 1a divided by the partition dam 1a-1b covered with the water-blocking sheet at the boundary with the section 1b, a soil cover and a temporary construction are provided on the put waste. A water impervious sheet is laid to complete land reclamation of the landfill section 1a, 2) and then a partition dam 1b-covered with the water impervious sheet at the boundary between the landfill section 1b and the landfill section 1c. After the waste is put into the landfill section 1b divided by 1c,
A temporary water-blocking sheet is laid on the input waste to complete the landfill of the landfill section 1b, and 3) and then the same work as 1) or 2) is performed on the landfill section 1n. Repeat the above to complete the first-stage landfill, and 4) when further landfilling in multiple stages, while sequentially peeling off the temporary water-blocking sheet laid on the landfilled section, The landfill from the second and subsequent stages to the uppermost stage is completed in the same manner as 1) to 3) above, and 5) a capillary barrier is placed on the uppermost landfill waste after completion of the landfill. Set up.

According to the present invention, of the rainwater falling in the final disposal site, the amount of rainwater that comes into contact with the waste, and hence the amount of leachate, is reduced as much as possible, and the rainwater that did not come into contact with the wastewater and the leachate are mutually separated. It is intended not to mix at all, and this is the landfill structure and construction method in which waste is landfilled in each landfill section divided by the partition dam by the embankment covered with the water-blocking sheet. Form a drainage canal with a height corresponding to the height, lay and remove a temporary water-blocking sheet on landfill waste, and collect water by collecting water and leachate separately from rainwater and rainwater. Effectively achieved by a combination of water collection facilities, etc. that separately receive the extracted leachate and rainwater in an isolated state, and cover the soil and the temporary seepage shield on the waste in the landfilled area. When the landfill was laid and the landfill waste after landfilling was completed and landfilled with another layer of waste, this temporary water-impervious sheet was previously removed and landfilled on that level. The leachate generated from the waste permeates the already disposed landfill waste in the lower stage and reaches the water collection pipe for leachate.

According to such means, the rainwater falling in the section in which the landfill work is performed becomes leachate by contacting with the waste, and then, by the water collecting pipe provided under the section. Collected in a drainage system. On the other hand, rainwater that falls into a section of the recess that has not yet been landfilled is collected in a drainage facility by a water collection pipe provided below the section.

Rainwater falling within the area of land where landfill has already been completed has the partition dam on the slope of the recess on the temporary impermeable sheet laid on the landfill waste in the area. The drainage channel on the slope provided at a height corresponding to the height of the drainage channel, for example, flowed laterally toward the small gutter, and the rainwater collected in this drainage channel flowed laterally along the drainage channel. After that, it is released to a disaster prevention pond.

During landfilling of waste, a minimum amount of leachate is separated from rainwater containing no harmful substances and collected in a drainage facility. The collected leachate is treated by coagulation sedimentation and biological treatment. Also, the treated water is treated by a water treatment facility that performs an adsorption treatment with an adsorbent such as activated carbon or a chelate to obtain treated water in which harmful substances are removed as much as possible.

This treated water is sent to a solar evaporation facility or a forced evaporation facility, and most of the water contained therein is naturally evaporated by the heat energy of sunlight, or further based on electric power or thermal power. It is removed by forced evaporation by artificially generated heat energy, and as a result, the treated water becomes a residue containing a high concentration of components that were not removed by the water treatment equipment.

The solar evaporation equipment is provided for the purpose of economically evaporating the moisture by utilizing the thermal energy of the sun, in which the evaporation bed for evaporating the treated water is constructed. Since the sprinkling pipe for sprinkling the treated water in the filter medium and the ventilation ventilation pipe for promoting the evaporation of the sprinkled water are embedded in the filter medium, the water content in the treated water is While evaporating efficiently, components other than water are captured by this filter medium.

As the forced evaporation equipment, for example, equipment such as a hot air heater or a drying furnace in which various energy sources are used is used, and this forced evaporation equipment is used for a large amount of leachate due to sudden rainfall. Therefore, the sun's evaporation equipment alone cannot sufficiently cope with the evaporation of the treated water due to the fact that the treated water is generated within a short time, or the solar energy is not sufficiently supplied due to the circumstances such as the season and the weather. In this case, since it is used as a supplement in order to supplement the capacity of the solar evaporation equipment, according to the present invention, the amount of purchased energy such as electric power can be saved.

In the case where a large amount of rainwater increases the amount of leached water, and thus the amount of treated water in a short time due to the rapid rainfall as described above, these leached water are treated by the water treatment equipment or the evaporation equipment. Or because the treated water cannot be received, the leachate and treated water are temporarily stored respectively, and the leachate adjustment for adjusting the amount of discharge to the water treatment facility and the evaporation facility, respectively. A tank and a treated water adjusting tank are provided.

In the landfill structure and the landfill construction method according to the present invention, the landfill waste after the entire landfill is completed is processed from the bottom to the top as disclosed in Japanese Patent Laid-Open No. 2001-17933. As a result of sequentially laying a capillary barrier (rainfall seepage control type cover soil) composed of three layers having different hydraulic conductivities such as a gravel layer, a sand layer and a cohesive soil layer, the waste disposal site after landfill is completed. Rainwater that has flowed laterally flows over the capillary barrier and can suppress the amount of rainwater that permeates into the waste.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Next, with reference to the drawings, specific embodiments of the landfill structure and the landfill method according to the present invention will be described in detail.

1 and 2 of the accompanying drawings illustrate waste
3 and FIG. 3 are a perspective view and a vertical cross-sectional view schematically showing a landfill disposal site in a case where the landfill plan line L extends vertically to three levels and three landfill sections are provided for each level. 4 is a perspective view and a vertical side view showing a state in which waste is landfilled in the first landfill section of the first stage of this landfill site, that is, section 1a, and FIGS. 5 and 6 are the landfill disposal. FIG. 7 is a perspective view and a vertical side view showing a state in which the waste is landfilled in the second landfill section of the first stage of the site, that is, the first b section, and FIGS. 7 and 8 are the first stage of the landfill disposal site. FIG. 9 is a perspective view and a vertical side view showing a state in which the waste is landfilled in the third landfill section, that is, the first c section, respectively, and FIGS. 9 and 10 show the second landfill disposal site.
It is a perspective view and a longitudinal side view which show the state at the time of burying waste in a 1st landfill division of a step, ie, a 2a division, respectively.

In FIG. 1 and FIG. 2, reference numeral 1 is a recess for waste disposal at a managed final disposal site, and 3 and 3 ′ are small steps which serve as drainage channels provided on the slope 2 of the recess 1. This gutter is a gutter for collecting rainwater that has fallen on the temporary impermeable sheet covered on the landfill waste in the recess, especially on the slope and during landfill work, and to guide it to the disaster prevention regulating pond. In addition, there is a water guiding gradient that allows this rainwater to flow down laterally on the slope, and two rainwater gradients are provided above and below according to the height corresponding to the height of the partition dam.

A water collecting facility 4 for separately receiving leachate and rainwater is arranged outside the concave portion 1, and a broken line A in FIG. 2 indicates a landfill planning line.

FIGS. 3 to 10 show, in order, a work procedure when landfilling waste according to the present invention in the landfill disposal site as shown in FIGS. 1 and 2.

As shown in FIGS. 3 and 4, in the landfill of the lowest step of the recessed portion 1, the partition dam 1a-1b and the partition dam 1b-1c are made by embankment, and the three landfill areas 1
a, 1b and 1c are formed.

First, in the landfill of the first landfill section 1a of the lowest stage, as shown in FIG. 4, the broken line x1 of the landfill plan line
The leachate generated in the landfill section 1a as a result of being thrown into the landfill section 1a is discharged from the perforated portion (shown in solid black) of the water collection tube 5 provided under the landfill section 1a.
The rain that enters inside and collects in the water collection facility 4 through the non-perforated portion (shown in hollow white) of the water collection pipe 5 and falls on the unfilled landfill sections 1b and 1c, From the perforated portions of the water collection pipes 5'and 5 "provided under these landfill sections, enter the water collection pipes 5'and 5", respectively, and collect them in the water collection equipment 4 through their non-perforated portions. To be

Under these water collection pipes 5, 5'and 5 ",
In addition, in order to prevent the seepage of the leachate from the respective landfill sections into the surrounding ground during the landfill, side walls of the recessed portion 1 are laid with synthetic rubber or synthetic resin waterproof sheet. ,
Alternatively, a water shield (not shown) using asphalt or impermeable cohesive soil is applied in advance before the start of landfill.

After landfill in the landfill section 1a is completed, as shown in FIG. 5 and FIG. 6, a temporary impermeable sheet 6 is laid on the waste in the landfill section 1a, and then the landfill section 1a. Landfill planning line x2 in the landfill section 1b in the same manner as the landfill of No.
The waste is landfilled up to this time, and the leachate generated in the landfill section 1b at the time of this landfill enters the water collection tube 5'from the perforated portion of the water collection tube 5'provided under the landfill section 1b, Rain that passes through the non-perforated portion and is collected in the water collection facility 4 and falls into the landfill section 1c that has not yet been landfilled is collected from the perforated portion of the water collection pipe 5 ″ that is also provided under the landfill section 1c. It enters the water pipe 5 ″, and is collected in the water collection equipment 4 through the non-perforated portion.

Rainwater that has fallen on the temporary water-impervious sheet 6 laid on the waste in the landfill section 1a, which has been completely landfilled, has a small gutter 3 along the water transfer gradient of the temporary water-impermeable sheet 6. The rainwater flowing toward the small step side groove 3 is guided to the small step side groove 3 and discharged to a disaster prevention regulating pond or the like (not shown).

After the landfill in the landfill section 1b is completed, as shown in FIGS. 7 and 8, the temporary water-impervious sheet 6 is laid on the waste in the landfill section 1b, and the landfill section 1a. Similarly to the landfills 1 and 1b, the landfill 1c is filled with waste up to the landfill plan line x3, and the leachate generated in the landfill 1c at the time of this landfill is the water collection pipe 5 provided under the landfill 1c. "From the perforated part to the water collection pipe 5"
It enters the inside and is collected in the water collection equipment 4 through the non-perforated part.

Rainwater that has fallen on the temporary water-blocking sheet 6 laid on the waste in the landfill sections 1a and 1b where landfilling has been completed has a small step along the water transfer gradient of the temporary water-blocking sheet 6. The rainwater flowing toward the gutters 3 and collected in the small gutters 3 is guided to the small gutters 3 and discharged to a disaster prevention regulating pond or the like (not shown).

After the landfill of the last landfill section 1c of the first stage is completed and the landfill of all the sections of the first stage is completed as described above, as shown in FIG. 9 and FIG. Temporary water-blocking shields are also placed on the waste that has been put into compartment 1c.
6 is laid, and the temporary water-impervious sheet 6 on the waste in the landfill section 1a is peeled off, so that the second landfill section 2a above the landfill section 1a is removed as shown in FIG. Move to landfill.

In the landfill of this landfill section 2a, partition dams 2a-1b are provided by embankment, wastes are thrown into the landfill section 2a up to the landfill plan line y1, and rainwater falling in this landfill section 2a The leachate that passes through the wastes buried in the landfill section 1a also collects in the water collection pipe 5. On the other hand, the rainwater that has fallen onto the temporary water-blocking sheets 6 of the landfill sections 1b and 1c that have already been landfilled and collected in the small gutters 3 is discharged to the disaster prevention regulating pond or the like as described above.

11, 12 and 13 of the accompanying drawings.
Illustrates how the water collection pipes 5'and 5 "are switched from rainwater collection pipes to leachate collection pipes as landfills in the landfill sections 1a, 1b and 1c to be landfilled as described above progress. FIG.

FIG. 11 shows the water collecting pipes 5, 5'and 5 "when the first landfill section 1a is landfilled as shown in FIG. 4 and the pit 7 provided in the water collecting and drainage facility. Leachate pit 7a and rainwater pit 7b
In this case, the leachate generated from the landfill section 1a passes through the water collection pipe 5 and the leachate pit 7a.
Rainwater that flows inward while falling into the landfill sections 1b and 1c flows into the rainwater pit 7b through the water collection pipes 5 ′ and 5 ″, respectively.

The leachate collected in the leachate pit 7a is sent to a water treatment facility to be treated water purified to a predetermined degree, while the rainwater collected in the rainwater pit 7b is sent to a disaster prevention regulating pond or the like and discharged. It

FIG. 12 shows the water collecting pipes 5 and 5'when the landfill section 1b is landfilled as shown in FIG.
And 5 "and the pit 7 are connected to each other. In the case of this landfill, the portion 5'a of the water collection pipe 5'in the leachate pit 7a shown in FIG. 11 was cut off. After removal, the opening 5'b through which the water collection pipe 5'communicates with the rainwater pit 7b is closed (stopped).

By such construction of the water collecting pipe 5 ', the water collecting pipe 5'is switched from rainwater to leachate, so that the leachate produced in the landfill section 1b is collected in the leachate pit 7a.

FIG. 13 shows the water collecting pipes 5 and 5'when the landfill section 1c is landfilled as shown in FIG.
And 5 "and the pit 7 are connected to each other. In the case of this landfill, the portion 5" a of the water collecting pipe 5 "in the leachate pit 7a shown in Figs. 11 and 12 is After being cut off and removed, this catchment pipe 5 "is located in the rainwater pit 7.
The opening 5 ″ b leading to b is closed (stopped).

As a result of such construction of the water collection pipe 5 ", the water collection pipe 5" is switched from rainwater to leachate, so that leachate produced in the landfill section 1c is collected in the leachate pit 7a.

As described above, after the water collecting pipes 5'and 5 "are switched from rainwater to leachate and landfilling of the landfill sections 1a, 1b and 1c is completed, that is, in the landfill after the second stage. , 5'and 5 "are all used as leachate collection tubes.

The treated water produced by treating the leachate produced during the landfill operation as described above with a water treatment facility for subjecting it to a treatment such as coagulation sedimentation treatment, biological treatment or adsorption treatment is then evaporated by a sun evaporation facility. After the treatment, the water content therein is removed by evaporation.

This solar evaporation facility has, for example, a structure as shown in the perspective view illustrated in FIG.
In the solar evaporation equipment 8 shown here, a perforated ventilation pipe 10 and a perforated sprinkler pipe 11 are also provided, for example, in an evaporation bed 9 made of a filter material such as sand or soil. It is embedded in upper and lower two stages, and below the sprinkling pipe 11, there is provided a dispersing auxiliary sheet 12 for laterally dispersing the treated water to disperse the treated water uniformly in the filter medium. An openable and closable roof 13 made of a translucent material such as a synthetic resin covering the evaporation floor 9 is provided on the roof 9.

A sprinkling pipe 11 sprinkles the treated water into the evaporating bed 9, and a ventilation vent pipe 10 is provided to send ventilation air into the filter medium to promote the evaporation of water. Depending on the weather, the translucent roof 13 allows the sunlight to be poured directly onto the evaporation floor 9 in the case of fine weather, and the rain does not wet the evaporation floor 9 in the case of rain. It is configured to open and close.

When the treated water cannot be completely treated within a predetermined time by the above-mentioned solar evaporation equipment depending on the condition of the weather or the season, various energy sources are used, for example, a hot air heater or a drying furnace. A forced evaporation facility such as the one described above is used supplementarily as needed.

The filter medium mainly adsorbing salts and other harmful non-evaporative components by such an evaporation facility is subjected to a re-elution preventing treatment for preventing the components from being re-eluted, and then, for example, is landfilled. It

After the planned landfill of all landfill sections is completed and the waste is thrown up to the entire landfill plan line L, the above-mentioned capillary barrier is laid on the waste. As a result, the amount of rainwater that has fallen after landfill permeates into the waste is suppressed, and even if the final disposal site is exposed to rainwater after completion of landfill, leachate that pollutes the surrounding environment may still be generated. Will be eliminated.

FIG. 15 is a flow system diagram showing how the landfill structure and the landfill method of the present invention described above function against rainfall.

The present invention will be described with reference to FIG. 15. Rainwater that has fallen into the landfill site of the landfill disposal site due to rainfall is stored in the bottom plate of the landfill depression and is provided in the switchable leachate collection pipe. It flows down and is guided to the leachate pit of the drainage system by this water collection pipe.

The amount of leachate discharged from the leachate pit is adjusted by a leachate adjusting tank and sent to a water treatment facility. The treated water produced by the treatment in this water treatment facility is treated with water. After adjusting the amount of discharge in the adjusting tank, a part of it is used to prevent the scattering of landfill waste in the landfill section, and the remaining treated water is sent to the solar evaporation facility. The water in the water evaporates, and the non-evaporated components are adsorbed and fixed on the filter material of this solar evaporation equipment. The non-evaporated component that has adsorbed the non-evaporated component or the non-evaporated component that remains as the evaporation residue has been subjected to re-elution prevention measures such as cement solidification and packing with water-blocking material to prevent the component from re-eluting. Later, it is landfilled.

In case of an emergency such as an amount of treated water that cannot be treated by the solar evaporation equipment alone or when the solar evaporation equipment cannot be used due to repairs or the like, the treated water should be forcibly evaporated. It is sent to be subjected to evaporation treatment, and the residue is subjected to re-elution prevention treatment in the same manner as the filter medium having the non-evaporated components adsorbed thereon.

On the other hand, among the landfill areas other than the landfill area at the landfill disposal site, the rainwater that has fallen in the area where landfilling has not yet started is for the switchable rainwater provided in the bottom plate of the landfill depression. After flowing down into the water collection pipe and being led to the rainwater pit of the water collection and drainage facility by this water collection pipe, it is sent to the disaster prevention regulation pond and discharged.

Of the landfill sections other than the landfill section at the landfill disposal site, the rainwater that has landed on the temporary impervious sheet that has already been landfilled and covers the landfill waste is
It flows down on the temporary water-blocking sheet into a drainage channel such as a small step gutter, and flows down to the disaster prevention regulating pond along the small step gutter and is discharged.

Further, rainwater that has fallen on a slope other than these landfill areas, for example, on the slope of the landfill recess, is also guided to the small gutter to reach the disaster prevention control pond and falls on the sun evaporation equipment. Rainwater is also discharged from the roof to the disaster prevention regulation pond.

In a managed landfill site where the structure and construction method described above are adopted, leachate and simple rainwater are thoroughly separated and treated separately at any landfill stage during landfill. In addition, the possibility that the amount of leachate generated during landfill is suppressed to the smallest possible and the treated water is discharged to the outside is thoroughly eliminated, and finally, the salts and other substances remaining in the filter medium are eliminated. Harmful non-evaporable components are treated together with the filter media to prevent re-elution, and are landfilled.Therefore, the risk of leachate derived from landfilled waste contaminating the surrounding environment is reduced to conventional managed final disposal sites. It will be eliminated more thoroughly than in comparison.

The above-described embodiment shows only one example for carrying out the present invention.
Without being limited to the embodiments shown here, various changes can be made to the individual requirements constituting the invention within the scope of the invention described in the claims, for example, how to divide landfill sections, landfill It goes without saying that many aspects configured by appropriately changing the number of sections, the number of landfill sections for each step, the number and arrangement of water collection pipes, the order of landfill sections for landfill, etc. can be included in the art. It will be obvious to those who are familiar with it.

[0055]

As is apparent from the above description,
According to the present invention, leachate generated from the landfill waste when landfilling the waste for each landfill section in a managed final disposal site for landfilling industrial waste, incineration ash discharged from an incinerator or other waste Therefore, the risk that the treated water is released to the outside of the final disposal site can be eliminated effectively and procedurally, and as much as possible, and the costly purchase energy consumption can be suppressed as much as possible.

[Brief description of drawings]

FIG. 1 is a perspective view schematically showing a final disposal site according to the present invention.

FIG. 2 is a vertical sectional side view showing the final disposal site of FIG.

FIG. 3 is a perspective view showing a state of landfill when the waste is landfilled in the first landfill section 1a of the first stage in the final disposal site of FIG.

FIG. 4 is a vertical sectional side view showing a state of landfill in FIG.

5 is a perspective view showing a state of landfill when waste is landfilled in the second landfill section 1b of the first stage in the final disposal site of FIG. 1. FIG.

6 is a vertical cross-sectional side view showing the state of landfill in FIG.

FIG. 7 is a perspective view showing a state of landfill when waste is landfilled in the third landfill section 1c of the first stage in the final disposal site of FIG.

FIG. 8 is a vertical cross-sectional side view showing the state of landfill of FIG.

FIG. 9 is a perspective view showing a state of landfill when waste is landfilled in the first landfill section 2a of the second stage in the final disposal site of FIG.

10 is a vertical cross-sectional side view showing the state of landfill in FIG.

FIG. 11 is a cross-sectional plan view schematically showing a connection state between the leachate water collection pipe and the rainwater water collection pipe and the leachate pit and the rainwater pit in the water collection and drainage facility in the landfill stage as shown in FIG. 4.

FIG. 12 is a cross-sectional plan view schematically showing how the water collection pipe 5 ′ is switched from the leachate water collection pipe to the rainwater collection pipe in the water collection and drainage facility in the landfill stage as shown in FIG. 6.

13 is a cross-sectional plan view schematically showing how the water collection pipe 5 ″ is switched from the leachate water collection pipe to the rainwater collection pipe in the water collection and drainage facility in the landfill stage as shown in FIG. 8. FIG.

FIG. 14 is a perspective view schematically illustrating a solar evaporation facility.

FIG. 15 In the landfill structure and landfill method of the present invention,
It is a block diagram which shows the state of the flow in which the rainwater which encounters the rainfall in landfill is processed.

[Explanation of symbols]

1 ... 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Slope 3, 3 '... 4 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Collection and drainage facilities 5, 5 ', 5 "... Water collection pipe 6 ... Temporary water-blocking sheet 7 ................... Pit 8: Solar evaporation equipment 9: Evaporating bed Ventilation pipe for ventilation 11 ・ ・ ・ ・ ・ ・ ・ ・ ・ Sprinkling pipe 12 ................... Auxiliary sheet for dispersion 13 ......... Translucent roof L, x1, x2, x3, y1 ... Landfill planning line

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takashi Kajimoto             4-9-9 Akasaka, Minato-ku, Tokyo Japan             Development Co., Ltd. (72) Inventor Takashi Yokoyama             1-23-1 Nagasu, Chuo-ku, Chiba-shi, Chiba             Within Ecotec Co., Ltd. F term (reference) 4D004 AA46 BB04 BB05 BB07                 4D034 AA11 BA01 CA18 DA01

Claims (8)

[Claims] 1. A waste for each landfill section created by partitioning the inside of a recess for waste input of a managed final disposal site for landfilling waste with a partition dam covered with a water-blocking sheet. Is a landfill structure for sequentially burying one step or upwards over a plurality of steps, wherein a slope of a water guiding gradient for receiving rainwater in the recess and allowing the rainwater to flow down laterally on the slope. A drainage channel having a height is formed at a height commensurate with the landfill height of landfill waste determined according to the height of the partition dam, and each landfill waste is placed on the landfill waste in the landfill section that has been landfilled. If a soil cover and a temporary impermeable sheet are laid in this area, and further waste is to be landfilled on the laid temporary impermeable sheet, the temporary impermeable sheet that has been laid before the landfill will be used. -To be removed, and
A water collecting pipe for separating the leachate produced by contact between waste and rainwater and the rainwater not contacting with the wastewater to the water collection and drainage facility, respectively, on the ground where the recessed portion is impermeable. A water treatment facility for treating the collected leachate, a sun evaporation facility for evaporating the treated water treated by the water treatment facility, and a forced evaporation are provided outside the recess. Said landfill structure, characterized in that facilities are provided, and a capillary barrier is coated on the waste after the landfill is completed. 2. The solar evaporation equipment, wherein a sprinkling pipe for sprinkling the treated water and a ventilation ventilation pipe for promoting evaporation of sprinkled water for the sprinkling pipe are embedded in the filter medium, respectively. The landfill structure according to claim 1, wherein the landfill structure has an evaporative bed, and the evaporative bed is covered with a roof of translucent material. 3. A leachate adjustment tank for adjusting the amount of leachate collected in the water collection and drainage facility and sent to the water treatment facility, and treated water discharged from the water treatment facility and sent to the evaporation facility. The landfill structure according to claim 1 or 2, wherein treated water adjusting tanks for adjusting the amount of water are provided respectively connected to the water collection and drainage facility and the water treatment facility. 4. The waste is disposed of in each of the landfill sections separated by a partition dam covered with a water-blocking sheet in the recessed portion into which the waste of the management type final disposal site is filled up. A method of landfilling waste in a single stage or in a plurality of stages for each landfill section from the first stage of the lowest stage to the uppermost stage from the lower stage to the upper stage, 1) the one or more stages Put waste into a certain landfill section of the lowest step when landfilling over steps,
Laying a cover soil and a temporary water-blocking sheet on the landfill waste in the landfill section where the landfill was completed to complete the landfill in this landfill section, and 2) and then the other one in the first step or the lowest step. Landfill of the landfill section of 1) is completed in the same manner as 1) above, and 3) Then, the same operation as 1) or 2) above is repeated until the last landfill section of the above-mentioned steps, and the one or the lowest 4) When the landfill is completed, and 4) further landfilling is carried out over a plurality of stages, the temporary water shield sheet laid on the landfill section that has already been landfilled.
While sequentially peeling off the tortoises, the landfilling from the second and subsequent stages to the topmost stage is completed in the same manner as in steps 1) to 3) above, and 5) the landfill of all landfill sections is completed. A capillary-barrier is provided on the landfill waste at the upper part, and the water collecting pipe provided on the ground where the recessed portion is water-blocked is used, and the waste put in the landfill section being landfilled is The leachate produced by the contacted rainwater and the wastewater respectively receives the rainwater that flows down from the landfill that is not yet landfilled, and guides these leachate and rainwater to the drainage system in a state where they are isolated from each other. The leachate is treated with water treatment equipment to obtain treated water, and then this treated water is subjected to solar evaporation or forced evaporation, and at the drainage channel having a water guiding gradient for laterally flowing down rainwater on the slope. Temporary interruption Sheet - rainwater received on bets, characterized in that discharge rainwater guided to rainwater and the current drainage flowing down along the slopes to the outside of the final disposal site, the landfill method. 5. The landfill procedure is the landfill section 1a for the first lowest step in the recess, and the landfill section 1a.
Of the landfill section 1b adjacent to each other in the lateral direction, the landfill section 1n further adjacent to the landfill section 1b further laterally adjacent to the landfill section 1b to the last landfill section 1n, or over a plurality of steps. In the case of landfill, the landfill section 2 for the second stage located above the first-stage landfill section consisting of these landfill sections 1a to 1n
a, a landfill section 2 adjacent to the landfill section 2a in the lateral direction
b, a section up to the last landfill section 2n which is sequentially formed adjacently to the landfill section 2c which is further adjacent to the landfill section 2b in the lateral direction, and the landfill section Na in the Nth stage which is located at the uppermost position in order. To Nn (where N is an integer of 1 or 2 and n is an integer of 2 or more) in landfilling waste in these order: 1) The landfill 1a and After the waste is put into the landfill section 1a divided by the partition dam 1a-1b covered with the water-blocking sheet at the boundary with the landfill section 1b, the soil is placed on the put waste. And a temporary water-blocking sheet is laid to complete the landfill of the landfill section 1a, and 2) the partition dam covered with the water-blocking sheet at the boundary between the landfill section 1b and the landfill section 1c. In the landfill section 1b divided by 1b-1c After throwing the waste into
A temporary water-blocking sheet is laid on the input waste to complete the landfill of the landfill section 1b, and 3) and then the same work as 1) or 2) is performed on the landfill section 1n. Repeat the above to complete the first-stage landfill, and 4) when further landfilling in multiple stages, while sequentially peeling off the temporary water-blocking sheet laid on the landfilled section, The landfill from the second and subsequent stages to the uppermost stage is completed in the same manner as 1) to 3) above, and 5) a capillary barrier is placed on the uppermost landfill waste after completion of the landfill. The landfill method according to claim 4, which comprises a procedure of providing. 6. The landfill method according to claim 5, wherein the residue remaining after the evaporation is collected and treated so as not to pollute the environment. 7. The solar evaporation equipment has a sprinkling pipe for sprinkling the treated water, and a ventilation pipe for sending drying air into the filter medium to promote ventilation in the filter medium, respectively. 7. The landfill method according to claim 5 or 6, wherein the landfill method has an evaporation bed, and the evaporation bed is covered with a translucent material roof. 8. The amount of leachate collected in the water collection and drainage facility and sent to the water treatment facility is adjusted by a leachate adjusting tank, and the amount of treated water sent from the water treatment facility to the evaporation facility is adjusted. The landfill method according to any one of claims 5 to 7, which is adjusted in a treated water adjusting tank.