JPH06126265A - Waste treatment and water permeation layer, sewage detector and water shielding sheet to be used in this treatment - Google Patents

Abstract

PURPOSE:To prevent the contamination of the ground by subjecting a throwing hole to a surface treatment, providing lower water shielding sheets, water permeation layers and upper water shielding sheets from the surface side to the surface of the treated hole, providing traps to the lower side of the lower water shielding sheets to collect sewage and discharging the sewage to the outside. CONSTITUTION:The surface of the excavated throwing hole 11 is smoothed and the proper points of the bottom thereof are provided with the traps 12 which are connected by drain pipes 13 to a sewage treatment plant. The lower water shielding sheets 15 consisting of polyethylene, etc., are extended on the surface of the throwing hole 11 by superposing the respective edges thereof on each other and thermally welding the superposed parts 15a. The water permeation layers 16 constituted of lower nonwoven fabrics 16a, nets 16d and upper nonwoven fabrics 16c are provided thereon. Further, the upper water shielding sheets 15b are extended on the upper nonwoven fabrics 16c by forming the superposed parts 15 and thermally welding these parts in the same manner as for the lower water shielding sheets 15. The traps 12 are provided with sensors 14 for detecting the sewage to detect the volume and quality of the sewage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waste treatment method, a water permeable layer and a sewage detection device used in the method, and a water shield sheet. In particular, sewage is discharged from a hole in which waste is buried in the surrounding ground. The present invention relates to waste treatment so that it does not infiltrate into the environment and pollute the environment.

[0002]

2. Description of the Related Art A conventional waste disposal method of this kind will be described with reference to FIG. In the figure, 1 is a hole excavated for discarding waste materials 2, 2. The surface of the hole 1 is treated so as to have a substantially smooth surface, and water-impervious sheets 3, 3, ... Then, the edges of the water-impermeable sheets 3, 3 ... Are overlapped with each other, and the overlapped portions 3a, 3
Each of a ... Is heat-welded and integrally attached.

In this way, sand particles 4, 4 ... Are spread over the upper surface of the stretched water-impervious sheets 3, 3 ... to a predetermined thickness to form a landfill 5 for wastes 2, 2. Therefore, when the wastes 2, 2 ... Are sequentially dumped on the sand grains 4, 4 ... and the dumping hole 1 is almost completely filled, the water blocking sheets 3b, 3b. Is stretched, and the overlapping portions of the edges are heat-welded, and the water-blocking sheets 3b, 3
The soil is treated by embedding soil 5a, 5a, etc. on b.

[0004]

In the above-mentioned conventional waste treatment method, a water-impermeable sheet is stretched on the surface of an excavated hole and sand is sprinkled on the upper surface thereof, but various types of waste are disposed from this upper surface. Since the material is thrown away, the welded portion of the water shield sheet may be peeled off or a tear portion may be formed in the water shield sheet. In such a case, it is conceivable that the sewage permeated into the waste from the peeled portion or the breakage portion will seep to the surrounding ground and cause well water or other ground contamination.

Therefore, there arises a technical problem to be solved in order to prevent the sewage polluted by the waste from leaching from the landfill of the waste to leak to the surrounding ground and become a factor of ground pollution. Therefore, the present invention aims to solve the problems.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and after excavating a waste dumping site to provide a dumping hole, surface treating the dumping hole, A lower water-impervious sheet is stretched on the surface of the dump hole, a water-permeable layer is further provided on the lower water-impermeable sheet, and an upper water-impermeable sheet is stretched on the upper surface of the water-permeable layer. A trap is provided at an appropriate place under the aqueous sheet, and the waste treatment method is configured to discharge wastewater accumulated in the trap to the outside, and the water-permeable layer is provided on the lower water-blocking sheet. A lower nonwoven fabric (protective material) is stretched, a net is stretched on the upper surface of the lower nonwoven fabric, an upper nonwoven fabric is stretched on the net, and an upper water-blocking sheet is stretched on the upper nonwoven fabric. A permeable layer used for the waste treatment method,
Also, the sewage detection device and the water blocking sheet used in the waste treatment method, which are configured to insert a sensor into the trap and detect sewage accumulated in the trap, are at least the surface on the slope side. The present invention provides a water-blocking sheet used in the waste treatment method, which is formed in a grain shape.

[0007]

When a dumping hole for waste is excavated, a trap is provided at an appropriate place in the dumping hole, a drain pipe is connected to the trap, and the drain pipe is connected to a predetermined wastewater treatment plant or the like. To be done. At this time, a sensor is inserted in the trap. In this way, the surface of the excavated dump hole is processed into a substantially smooth surface by an appropriate means. Therefore, a lower water-impervious sheet made of, for example, polyethylene, vinyl chloride or a rubber material is stretched on the smooth surface.

Next, a water-permeable layer is provided on the lower water-blocking sheet. A protective material made of a non-woven fabric or the like is attached to a lower portion of the water-permeable layer, a net made of a plastic material or the like is attached to the protective material, the non-woven fabric is attached to the net, and the non-woven fabric is again attached to the non-woven fabric. The upper water-blocking sheet is stretched. Therefore, it is natural that the water-impermeable sheets have their edges overlapped with each other, and the overlapped portions are heat-welded and integrally stretched. Further, by using the water-blocking sheet whose surface is grained, the friction coefficient becomes large even when stretched at a steep angle of the excavation hole, so that the adhesion becomes good and the steep slope Appropriately suitable for drilling holes.

Further, by using the water permeable layer, even if the impact force of various forms of waste dumped in the dump hole is applied to the upper water-impervious sheet, the upper water-impervious sheet does not move the lower water permeable layer. Since the direct hitting force is alleviated by the buffering action of the constituent non-woven fabric (protective material), the phenomenon such as tearing of the upper water-impervious sheet can be almost prevented. Furthermore, even if the upper water-impervious sheet is cracked or the like, and sewage contaminated with the waste accumulated on the upper water-impermeable sheet oozes downward from the tear portion. The sewage flows in the permeable layer and stays in the trap. Therefore, the quality, quantity, etc. of the wastewater accumulated in the trap are detected by the sensor, and the wastewater is discharged to the outside through the drain pipe. Thus, wastewater contaminated with waste does not seep to the ground around the waste disposal hole.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. For convenience of explanation, the conventional technique will be described at the same time. FIG. 1 is a vertical cross-sectional view of a dump hole 11 excavated for dumping wastes 10, 10. In the figure, the trap 12 is placed at an appropriate position on the bottom of the dump hole 11.
Is provided. Further, a drain pipe 13 is connected to the trap 12, and the drain pipe 13 is connected to a predetermined sewage treatment plant (not shown) or the like. Further, a sensor 14 is inserted in the trap 12, and the sensor 14 is configured so as to be able to detect the amount of wastewater flowing into the trap 12 or the quality of PH or the like.

In FIG. 2, after the surface of the dump hole 11 is treated to be a substantially smooth surface, the lower water-blocking sheets 15, 15 ... Made of polyethylene, vinyl chloride, rubber material, etc. are formed on the surface of the dump hole 11.
Is stretched. The water-impermeable sheets 15, 15 ... Have their edges overlapped with each other, and the overlapped portions 15a, 15a. Next, the water permeable layer 16 is provided on the upper surface of the lower water-blocking sheet 15. Thus, in the embodiment of FIG. 3, the water-permeable layer 16 is a nonwoven fabric 16a, 16a having a considerable thickness on the lower water-blocking sheet 15.
... are attached and joined to each other, and further, the lower nonwoven fabric 1
The nets 16b, 16b made of a plastic material or the like are placed on the upper surfaces of the 6a, 16a, ...
Upper non-woven fabrics 16c, 16 on the nets 16b, 16b ...
Attach c ... and join each other. Then, the upper non-woven fabrics 16c, 16c ...
Are stretched and the mutual overlapping portions 15c, 15c are heat-welded.

[0012] Thus, both of the water-blocking sheets 15 and 1
5b is excellent in tensile strength, tear strength, burst strength, elongation, etc.,
As a matter of course, a material having good durability and weather resistance and having strong mutual heat-bonded portions is selected. Further, as shown in FIGS. 6 and 7, the surfaces of the water-impermeable sheets 15 and 15b are formed in a grain shape P, P ... And have a large friction coefficient.
Further, both of the non-woven fabrics 16a and 16c serve to buffer the impact applied to the water blocking sheets 15 and 15b and the net 16b interposed between the upper and lower non-woven fabrics 16a and 16c. Thus, the direct impact force of the wastes 10, 10 ... Of various forms dumped in the dump hole 11 is the non-woven fabric 16
Since it is alleviated by the buffering action of a and 16c, damage and tear of the water blocking sheets 15 and 15b and the net 16b are prevented. Therefore, the contaminated water contaminated with the wastes 10, 10 ... And accumulated in the dump hole 11 is blocked by the upper water-blocking sheets 15b, 15b ... And outside the dump hole 11. It does not seep into the surrounding ground.

In addition, by any chance, the upper water-blocking sheets 15b, 1
Even if a rupture portion is formed in a part of 5b ... and the sewage flows out from the rupture portion, the sewage flows into the water permeable layer 16 and then flows into the trap 12 from the water permeable layer 16.
The trap 12 is discharged to a sewage treatment plant or the like through a drain pipe 13. Thus, the sewage never leaks into the surrounding ground. Also, the trap 12
Since the amount of sewage leaked out, the mass, or the like is detected by the sensor 14 installed inside, appropriate measures can be taken.

Further, when the dump hole 11 is almost filled with the wastes 10, 10, ..., As shown in FIG.
0, 10 ... Re-extend the water-impervious sheet 17 and spread soil 18 etc. on it to form a landfill site 19 for the waste products 10, 10 ..., and the landfill site 19 is a park. , Can be used in green areas, etc. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified version.

[0015]

According to the present invention, as described in detail in the above-mentioned one embodiment, the water-impermeable sheets stretched over the surface of the waste dumping hole are doubled, and the space between the water-impermeable sheets is Since the water permeable layer is provided in the above, since the direct impact force of various wastes thrown into the dump hole is buffered by the water permeable layer, the water impervious sheet does not break. Therefore, the sewage polluted by the disposal will not leak to the surrounding ground and cause pollution. Further, in the unlikely event that breakage or the like occurs in a part of the water-permeable sheet, even if the sewage is about to flow out from the breakage part, it flows into the lower water-permeable layer, flows out from the water-permeable layer into the trap, and, Since it is discharged from the trap through a drain pipe to a sewage treatment plant or the like, in this case as well, it does not exude to the ground around the sewage. Furthermore, the quantity and quality of wastewater can be detected by a sensor installed in the trap.

Further, since the surface of the water-impervious sheet is formed in a grain shape, the coefficient of friction becomes large, and therefore,
It is possible to use it for steep slopes of dump holes.
It is an invention that produces various effects.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a state in which a waste dumping hole is excavated.

FIG. 2 is a vertical cross-sectional view showing a state in which a water blocking sheet is stretched over the dump hole of FIG.

FIG. 3 provides a water-permeable layer on the water-blocking sheet of FIG.
FIG. 3 is a vertical cross-sectional view showing a state in which a water blocking sheet is stretched on the upper surface thereof.

FIG. 4 is a vertical cross-sectional view showing a state in which waste is dumped in the dump hole of FIG.

FIG. 5 is a vertical cross-sectional view showing a state in which a water-blocking sheet is stretched on the waste shown in FIG. 4 and soil is placed on the upper surface thereof.

FIG. 6 is a partially cutaway plan view of the water shield sheet.

7 is a cross-sectional view taken along the line AA of FIG.

FIG. 8 is a vertical sectional view of a conventional example.

[Explanation of symbols]

 10 Waste 11 Disposal Hole 12 Trap 13 Drain Pipe 14 Sensor 15 Lower Water-Impermeable Sheet 15b Upper Water-Impermeable Sheet 16 Water-permeable Layer 16a Lower Nonwoven Fabric 16b Net 16c Upper Nonwoven Fabric

Claims (4)

[Claims] 1. A waste dumping site is excavated to form a dumping hole, the dumping hole is surface-treated, and a lower water-impervious sheet is stretched on the surface of the dumping hole. A water-permeable layer is provided on the sheet, an upper water-impervious sheet is stretched on the upper surface of the water-permeable layer, and a trap is provided at an appropriate place below the lower water-impermeable sheet, and sewage accumulated in the trap. A waste treatment method characterized in that the waste is discharged to the outside. 2. The water-permeable layer comprises a lower non-woven fabric (protective material) stretched on a lower water-blocking sheet, a net stretched on the upper surface of the lower non-woven fabric, and an upper non-woven fabric placed on the net. 2. The water-permeable layer used in the waste treatment method according to claim 1, wherein the upper non-woven fabric is stretched, and an upper water-impervious sheet is stretched on the upper non-woven fabric. 3. The sewage detection apparatus used in the waste treatment method according to claim 1, wherein a sensor is inserted into the trap so that sewage accumulated in the trap can be detected. . 4. The water impervious sheet used in the waste treatment method according to claim 1, wherein the water impervious sheet has a grain-like surface at least on the slope side.