JP2982533B2 - Waste disposal site - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a managed waste disposal site, and more particularly, to dumping and reclaiming waste above a seepage control sheet laid on a bottom surface to discharge sewage leached from the waste. The present invention relates to a waste disposal site that treats waste while preventing leakage.

[0002]

2. Description of the Related Art For example, in a landfill type waste disposal site that dumps industrial waste and general waste, it is necessary to prevent wastewater leaking from the disposal site from penetrating underground and causing environmental pollution. It is obliged to implement a seepage control on the bottom of the building. Conventionally, a method of laying a soft synthetic resin-based or rubber-based water-impervious sheet has been adopted as such a water-impervious work from the viewpoints of reliability, safety, workability, economy, and the like.

That is, such a soft water-impervious sheet has characteristics that it is excellent in water-impermeability in comparison with other materials because it hardly permeates water, and that it is easy to lay and excellent in economy. Therefore, it is considered to be an optimal member as a water-blocking sheet for the landfill type waste disposal site.

[0004] In a waste disposal site where such a water-impervious sheet is laid on the bottom surface, sewage leached from the waste is
Leakage to the outside of the site is blocked by the impermeable sheet and accumulates deep in the disposal site, so it is necessary to eliminate this. And as a method of eliminating such accumulated sewage,
2. Description of the Related Art Conventionally, a method has been adopted in which a drainage pipe is provided at a predetermined position on the bottom of a disposal site, and wastewater is discharged through the drainage pipe.

[0005]

However, according to the above-mentioned conventional method of providing a drainage pipe at a predetermined position on the bottom of a disposal site, the drainage pipe is provided within a filter layer having water permeability and is divided into predetermined parts by design. Since only a small number are arranged in a line or mesh pattern at a certain rate per area of the drainage area, it takes time for the leached sewage to reach the drainage pipe through the filter layer. However, because the drainage capacity of such a small number of drainage pipes is not so high,
For example, when a large amount of sewage leaches out in a short period of time in rainy weather, etc., the sewage cannot be discharged instantaneously, and thus the sewage accumulates at the bottom of the disposal site and forms a head, thereby causing the water from the seepage control sheet. There was a problem that leakage was likely to occur.

Accordingly, the present invention has been made in view of the above-mentioned problems, and it is intended to easily collect and drain sewage leached from waste, thereby easily preventing the sewage from leaking out from the impermeable sheet. It is an object of the present invention to provide a waste disposal site having a leachate collection and drainage facility capable of collecting wastewater.

[0007]

DISCLOSURE OF THE INVENTION The present invention has been made to achieve the above object, and the gist of the invention is to dispose of and discard the waste above the impermeable sheet laid on the bottom surface. In a waste disposal site that treats waste while preventing leakage of sewage leached from a substance to the outside of the site, a large number of the disposal sites are disposed adjacent to the upper surface of the water-blocking sheet so as to cover substantially the entire deepest portion of the bottom surface. And a percolation pipe, and a leachate collection and drainage facility comprising a planar filter material laid over the upper surfaces of the plurality of perforated pipes.

[0008]

According to the waste disposal site of the present invention having the above-described structure, since a large number of perforated pipes are arranged adjacent to the top surface of the impermeable sheet almost all over the deepest portion of the bottom surface of the disposal site, The sewage leached from the material is immediately collected in the perforated pipe immediately below it through the sheet filter material, and is quickly discharged through each water collection pipe without collecting at the bottom of the disposal site.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic sectional view showing a waste disposal site 10 according to one embodiment of the present invention. The waste disposal site 10 is formed by excavating a large site in a mountain area or the like in a concave shape, for example, and a soft synthetic resin or rubber-based sheet member is provided on the bottom surface of the concave portion into which the waste H is charged. In addition to laying the produced water-impervious sheet 11, a leachate collection / drainage facility 12 is provided to cover the water-impervious sheet 11 almost all over the deepest part of the waste disposal site 10.

As shown in FIG. 2, the leachate collection / drainage facility 12 has the deepest portion of the water-blocking sheet 11 laid on the bottom of the concave portion.
That is, a plurality of perforated pipes 13 which are arranged adjacently in a row along the lower side portion of the trapezoidal cross section to cover substantially the entire deepest portion and are densely disposed, and cover the plurality of perforated pipes 13. It is constituted by the planar filter material 14 to be laid,
Further, if necessary, a protective soil 15 for protecting the leachate collecting and draining facility 12 from being damaged by the waste H is spread over the upper surface of the planar filter material 14.

The perforated pipe 13 has a strength capable of withstanding the weight of the waste H and is not corroded by sewage, and is a cylindrical member made of, for example, vinyl chloride or stainless steel. Many holes of a predetermined size are formed. The diameter of the perforated pipe 13 is appropriately designed in consideration of the expected amount of wastewater to be discharged, the scale of the waste disposal site 10, the amount of rainfall in the area, and the like. It is preferable that the size is such that it can flow down in the perforated pipe 13.

The planar filter material 14 is provided to allow only sewage to pass from the peripheral surface of the perforated tube 13 in order to prevent clogging of the perforated tube 13 with waste H, and is made of, for example, synthetic fiber. Non-woven fabrics and woven fabrics can be used.

Then, the wastes H are sequentially dumped above the leachate collecting and draining facility 12 covered with the protective soil 15,
According to the waste disposal site 10 of this embodiment, the waste H is discharged during the landfill operation or after the landfill is completed.
The sewage leached from the wastewater is discharged quickly and easily to the outside without collecting at the bottom of the disposal site 10. That is, since a large number of perforated pipes 13 are densely arranged in the deepest part of the waste disposal site 10 so as to cover almost the entire area thereof, the sewage leached downward from the bottom surface of the waste H is protected soil. After flowing into any one of the perforated pipes 13 located immediately below via the filter material 15 and the filter material 14, it flows down into any one of the perforated pipes 13 toward a treatment facility such as a raw water pit. Therefore,
The sewage leached from the waste H is collected and drained almost in real time without staying above the impermeable sheet 11, and the sewage can flow down the diameter of the perforated pipe 13 while maintaining the free water surface. By selecting the size,
Sewage can be collected and drained without generating a water head above the water shielding sheet 11.

The sewage flowing down in each perforated pipe 13 is:
For example, the waste water is accumulated at a predetermined location at the end of the waste disposal site 10, and is fed to a treatment facility such as a raw water pit through a drain pipe 16 penetrating the seepage control sheet 11 as shown in FIG. Is done.

The leachate collecting and draining facility 12 can be installed not only at the deepest part of the waste disposal site 10, but also at an inclined part in communication with the deepest part disposed at the deepest part.

Further, if necessary, air is supplied to the perforated pipe 13 to ventilate the entire surface of the waste H from the bottom, so that aerobic decomposition of the waste can be promoted and the perforated pipe 13 can be promoted. Perforated exhaust pipe 1 at a predetermined location in communication with pipe 13
By standing 7, the aerobic decomposition can be further promoted.

[0017]

As described in detail above, the waste disposal site according to the present invention covers a substantially entire deepest portion of the bottom surface, and a large number of perforated pipes and a sheet filter material are provided on the upper surface of the impermeable sheet. Leaching water from the waste is immediately collected in the perforated pipe immediately below it and quickly discharged without accumulating at the bottom of the disposal site. A large head due to sewage does not occur upward, and therefore, leakage of sewage from the impermeable sheet can be easily prevented.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view showing one embodiment of a waste disposal site according to the present invention.

FIG. 2 is an enlarged cutaway perspective view showing a main part of a waste disposal site according to the present invention.

FIG. 3 is a schematic vertical sectional view showing one embodiment of a waste disposal site according to the present invention.

[Explanation of symbols]

 Reference Signs List 10 Waste disposal site 11 Waterproof sheet 12 Leachate collection and drainage facility 13 Perforated pipe 14 Planar filter material 15 Protective soil

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-101288 (JP, A) JP-A-4-35780 (JP, A) JP-A-1-210093 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) B09B 1/00 E02B 3/12 E02D 3/00

Claims (1)

(57) [Claims] 1. A waste disposal site that treats waste while dumping and reclaiming waste above the impermeable sheet laid on the bottom surface, thereby preventing wastewater leached from waste from leaking out of the site. A plurality of perforated pipes, wherein the disposal site covers substantially the entire deepest portion of the bottom surface and is disposed adjacent to the upper surface of the water-impervious sheet; and a planar filter material laid over the plurality of perforated pipes. A waste disposal site comprising a leachate collection and drainage facility comprising: