JPH0812033A - Harmful substance leak preventing structure for refuse buried place - Google Patents

Abstract

PURPOSE:To surely prevent the environmental pollution due to the dust exudation liquid even at an already constructed dust buried place, besides a newly constructed dust place, by striking the suction cylinders each of which is constituted so that a perforated inner cylinder charged with the artificial zeolite is inserted into a perforated outer cylinder at a prescribed place around the periphery of a dust buried place which is formed by the covering with soil and sand. CONSTITUTION:A hole 12 for throwing away dust is excaveted on a base ground 11, and the peripheral wall of the hole 12 is covered with a covering member 13. Dust 14 is thrown away into the hole 12, and soil and sand 15 are applied on the dust 14. On the periphery of the dust buried ground R, suction cylinders 16 are struck. The suction cylinder 16 consists of a perforated outer cylinder 17 and a perforated inner cylinder 18 inserted into the perforated outer cylinder 17, and a number of through holes 17A are formed from the lower part on the perforated outer cylinder 17, and the inside of the perforated inner cylinder 18 is charged with a screen-shaped cylinder body 18A, and the inside of the perforated inner cylinder 18 is charged with the granular artificial zeolite 19. The exudation liquid is sucked up through the capillary phenomenon to the artificial zeolite 19 through the through holes 17A on the perforated outer cylinder 17 of the suction cylinder 16 and the screen-shaped cylinder body 18A of the perforated inner cylinder 18, and the harmful substance is suction-removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing harmful substances from leaking from landfill sites.

[0002]

2. Description of the Related Art Conventionally, in a landfill R, as shown in FIG. 4, a hole (2) for dumping waste is excavated in the ground (1),
After covering the surrounding wall with the covering material (3), dust (4) is put in the hole.
The structure in which it was dumped at (2) and covered with earth and sand (5) was applied. The coating material (3) is for preventing exudate containing harmful substances such as organic substances and heavy metals exuding from the dust (4) from mixing with groundwater flowing through the ground (1). 3) is, for example, a plastic film or a concrete layer.

[0003]

However, in the above conventional structure, when the covering material (3) is ruptured or cracked, exudate containing harmful substances such as organic substances and heavy metals exuding from the dust (4) is generated. There is a problem that the coating material (3) leaks from the landfill R through the damaged portion (3A), mixes with the groundwater, and contaminates it.

[0004]

As a means for solving the above-mentioned conventional problems, the present invention excavates the ground (11) to provide a hole (12) for dumping dust, and the peripheral wall of the hole (12) is After covering with the covering material (13), dump the dust (14) into the hole (12),
Adsorption cylinder (16) with a porous inner cylinder (18) filled with artificial zeolite (19) inside a porous outer cylinder (17) is inserted at a predetermined place around the landfill R that is landfilled with (15). Placed garbage landfill R
It provides a structure for preventing the leakage of harmful substances.

[0005]

[Operation] At the landfill R, the exudate containing harmful substances such as organic substances and heavy metals that leaks from the dust (14) leaks to the ground when the covering material (13) of the hole (12) is broken or cracked. If it does, the adsorption cylinder (16) placed around the landfill R
The harmful substance in the exudate is adsorbed and removed by the artificial zeolite (19) filled in the porous inner cylinder (18), and groundwater is reliably prevented from being contaminated by the harmful substance. When the artificial zeolite (19) reaches the adsorption saturation, the adsorption column
Remove the porous inner cylinder (18) from (16) and use a new artificial zeolite
The porous inner cylinder (18) filled with (19) is replaced, or only the artificial zeolite (19) in the porous inner cylinder (18) is replaced with a new one.

The artificial zeolite used in the present invention has been developed for the purpose of stable supply while covering non-uniformity of quality due to mixing of impurities, which is a drawback of natural zeolite depending on a specific use. Is. Here, artificial zeolite is a zeolite produced by hot water treatment of fly ash, which is discharged in large quantities from power plants using coal as an energy source, by adding alkali such as caustic soda, and its crystals are rich in phillipsite. It is Artificial zeolite has a function of easily exchanging alkali metal or alkaline earth metal ion-bonded in the zeolite with other cations such as heavy metal ions invading, and entering into the pores in the crystal structure of the zeolite. It also has a function of selectively adsorbing the gaseous substance. Further, the artificial zeolite is also excellent in the adsorption property for organic substances such as fats and oils, fatty acids and amines.

[0007]

EXAMPLE The present invention will be described with reference to an example shown in FIGS. 1 to 3. A ground (11) is provided with a hole (12) for dumping dust,
The peripheral wall of the hole (12) is covered with a covering material (13). The dressing (13)
Is a plastic film such as polyethylene, polypropylene, polyvinyl chloride, polyester, or a concrete layer. The trash (14) is dumped in the hole (12), and the earth (15) is covered on it. A suction cylinder (16) is placed around the landfill R. The adsorption cylinder (16) includes a porous outer cylinder (17) and a porous inner cylinder (1) inserted into the porous outer cylinder (17).
8) and the perforated outer cylinder (17) has a large number of through holes from the bottom.
(17A) is provided, and the perforated inner cylinder (18) is a mesh cylinder from the bottom.
(18A) is provided, and the porous inner cylinder (18) is filled with granular artificial zeolite (19). The particle size of the granular artificial zeolite (19) is usually 5 to 500 mesh.

As shown in FIG. 3, a plurality of the adsorbing cylinders (16) are mainly placed between the refuse landfill R and the groundwater flow (20). In the present invention, if desired, a suction cylinder (16) may be installed around the entire circumference of the landfill R. The landfill R may be a new landfill or an existing landfill, but it is an advantage of the present invention that it is possible to easily place the adsorption cylinder (16) around the existing landfill R. If the leachate leaks into the ground from the damaged part (13A) due to the coating material (13) being torn or cracked, the leachate will pass through the perforated outer cylinder (17) of the adsorption cylinder (16). Through the pores (17A) and the reticulated cylindrical body (18A) of the porous inner cylinder (18), the artificial zeolite (19) is sucked up by a capillary phenomenon to remove the harmful substances. When the artificial zeolite (19) reaches the adsorption saturation, the porous inner cylinder (18) is pulled out from the porous outer cylinder (17) of the adsorption cylinder (16), and the new porous inner cylinder (1) is filled with the new artificial zeolite (19).
8) or replace only the artificial zeolite (19) inside the porous inner cylinder (18) with a new one.

[0009]

Therefore, according to the present invention, environmental pollution due to the waste leachate can be surely prevented not only in the new landfill site but also in the existing landfill site.

[Brief description of drawings]

 1 to 3 show an embodiment of the present invention.

[Figure 1] Cross section of landfill

FIG. 2 is an exploded perspective view of a suction cylinder.

[Figure 3] Landfill land plan

[Figure 4] Cross section of conventional landfill

[Explanation of symbols]

 11 Ground 12 Hole 13 Covering material 14 Garbage 15 Sediment 16 Adsorption cylinder 17 Porous outer cylinder 18 Porous inner cylinder 19 Artificial zeolite R Waste landfill

Claims (1)

[Claims] 1. A landfill site where a ground is excavated to provide a hole for dumping dust, the peripheral wall of the hole is covered with a covering material, the dust is dumped into the hole, and the land is covered with earth and sand. A structure for preventing the leakage of harmful substances in a landfill of land, which is characterized by placing an adsorption cylinder with a porous inner cylinder filled with an artificial zeolite inside a porous outer cylinder at a predetermined location around the