JPS6265802A - Waste disposal station - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] LIL top L1 dish top 1 The present invention relates to a waste disposal site which is provided with a liquid-blocking membrane and a sewage treatment device for treating contaminated water flowing out from waste. This particularly concerns waste disposal sites with rainwater protection.

1. If waste is dumped into the ground, which releases contaminated water containing decaying organic matter, harmful substances, oils, etc., the contaminated water will seep into the ground, contaminate the land, and mix with groundwater. Harmful to humans and animals. As a countermeasure, normally a liquid-shielding membrane (liquid-shielding sheet) is spread on the ground surface of a waste disposal site and waste is dumped on top of it, and contaminated water collected on the liquid-shielding membrane is is treated in sewage treatment equipment.

By the way, at waste disposal sites where rainwater mixes with dumped waste, the amount of contaminated water increases, so sewage treatment equipment must be enlarged, and its construction costs Not only was it expensive, but it also required a large amount of maintenance costs. Furthermore, since the quality of contaminated water fluctuates due to the mixing of rainwater, the quality of water after purification is not stable, making wastewater treatment difficult.

An object of the present invention is to prevent rainwater from entering waste at a waste disposal site and to reduce the amount of contaminated water to be purified.

The purpose of this is to dispose of waste with or without contact with a rainwater shield at a waste disposal site that is equipped with a liquid-blocking membrane and a contaminated water treatment system that treats contaminated water flowing out from waste. In addition to covering the object from above, the parts that come into contact with the waste have a fluid replacement function, and the parts that do not come into contact with the waste do not have a fluid replacement function. This is achieved by discharging rainwater collected by the liquid-shielding membrane attached to the surface of the liquid-shielding membrane to the outside of the waste disposal site using a rainwater discharge means.

In other words, the present invention prevents rainwater from mixing with waste, drains clean rainwater received by the liquid-blocking membrane outside the waste disposal site, and purifies only the contaminated water flowing out from the waste itself. Since the amount of contaminated water is smaller than in the past, it is possible to set the capacity of the sewage treatment equipment to the minimum depending on the amount of waste to be disposed of.

An embodiment of the present invention shown in FIGS. 1 to 6 will now be described.

FIG. 1 shows a waste disposal site 10 as a vertical cross-sectional view, and the waste accumulation section 12 of the waste disposal site 10 is on a slope, surrounded by a concrete embankment wall 14, and The entire structure is covered with a liquid-shielding flexible material 16 (e.g., rubber membrane, soft oil film). On top of the lining 16 is a liquid guiding pipe 18 made of concrete, hard resin, etc.
are attached in a tree-like distribution (see Figure 2).

This liquid guiding pipe 18 is made up of a large number of branch pipes 20 and a main pipe 22, and each branch pipe 20 is inclined toward the main pipe 22 and converges.
2 is inclined from the position of the waste 40 toward the sewage treatment equipment 32 described later, and as shown in FIGS. It is located in Furthermore, a large number of fluid replacement holes 24 are formed along the entire length of the liquid guide pipe body, and a liquid-permeable foamed polyurethane soil inflow prevention material 26 is attached to cover the entire outer periphery, and an area that does not come into contact with the waste 40 is provided. Undumped waste part 1
In 3, the water-shielding It! J28 is applied with or without adhesive (see Figure 5)
.

The sewage treatment device 32 is arranged outside the embankment wall 14, and the main pipe 22 of the liquid guide pipe 18 is introduced, and a rainwater discharge means 34 including a drainage pump P is installed along the embankment wall 14. has been done.

Furthermore, the waste 40 dumped at waste dumping position A is
Its entire upper surface is covered with a rainwater shielding membrane 30 made of vinyl chloride, polyethylene, ethylene-vinyl acetate copolymer, ethylene-propylene terpolymer, etc., and can be reinforced with embedded canvas as necessary.

The present embodiment is configured as described above, and the contaminated water flowing out from the waste 40 passes through the soil inflow prevention material 26 of each branch pipe 20 and main pipe 22 in the waste accumulation section 12, and passes through the replenishment hole. 24 into the pipe body of the conduit a pipe 18, and the debris that collects in the main pipe 22 flows down along the slope and flows down to the embankment wall 14.
The wastewater enters a sewage treatment device 32 located outside of the wastewater treatment facility 10, is purified, and is discharged outside the waste disposal site 10 as clean water.

On the other hand, during rainy weather, rainwater does not mix or enter the waste 40 covered with the rainwater shielding membrane 30, and the rainwater flows down along the rainwater shielding PA 30 toward the waste collection section 13, leaving the waste undisturbed. The rainwater received at the dumping part 13 flows along the laying 16 and is collected along the embankment wall 14 at the lower limit position of the slope (see B in FIG. 2).

During this time, in the waste non-dumping section 13 , the outer periphery of the upper half of the branch pipe 20 and the main pipe 22 is covered with a water-blocking membrane 28 , so rainwater does not enter into the liquid guide pipe 18 . The clean rainwater accumulated along the embankment wall 14 is sequentially discharged to the outside of the waste disposal site 10 by the rainwater discharge means 34.

In addition, in response to an increase in the amount of accumulated waste 40, the water-shielding film 28 of the liquid guide pipe 18 in the waste non-dumping section 13 is removed to expose the earth and sand inflow prevention material 26.
A fluid replacement function can be given to the entire liquid guide pipe 18 in contact with the rainwater shielding membrane 30, as shown in FIG.
, b), the rainwater shielding films 3OA and 30B may be sequentially joined.

In this way, in this embodiment, the waste 40 is covered with the rainwater shielding membrane 30 to prevent rainwater from getting mixed into the waste 40, and the rainwater is collected separately from contaminated water for waste disposal. 10, the amount of contaminated water to be treated by the sewage treatment device 32 is small, and the quality of the contaminated water does not change much. It is possible to set the processing capacity to an appropriate size, and the construction cost of the sewage treatment equipment 32 is reduced.
Maintenance and management costs are reduced.5 Furthermore, by covering the waste 40 with the rainwater shielding film 3o, it is possible to suppress the generation of bad odors and prevent the impact on neighboring residents as much as possible.

In the above embodiment, the lower half of the liquid guide pipe 18 is covered with the membrane 16.
However, it is not necessary to adopt such a structure, and the liquid guide pipe 18 is placed on the top surface of the flat membrane 16.
You can just attach the . However, in that case, it is necessary to cover the entire exposed portion of the earth and sand inflow prevention material 26 in the non-waste dumping section 13 with a water-blocking film 28 in the shape of Ω.

In addition, instead of the earth and sand inflow prevention material 26 in the previous embodiment, sand or pebbles 26△ in the form shown in FIG. In that case, it is preferable to cover the pebbles 26A with a liquid-permeable nonwoven fabric (or suction prevention membrane) 29, and then place the launching membrane 28A on top of that. , it is possible to prevent direct contact between the pebbles 26Δ and the water-shielding film 28A, thereby avoiding damage to the water-shielding film 28A.

Furthermore, the liquid guide pipe 1 is installed along the surface of the rainwater shield pIA30.
The influence of rainwater on the waste 40 can be more reliably prevented by installing a rainwater collection pipe based on the same principle as in 8 in the form of a tree branch and guiding the rainwater collection pipe directly to the rainwater collection position (see B in Fig. 2). is possible.

Furthermore, a structure may be adopted in which an earthen embankment is provided instead of the concrete embankment wall 14 and this is covered with pi11!116.

In the embodiment described above, the waste 40 was brought into direct contact and covered with the rainwater shielding membrane 30, but if necessary, the waste 40 may be covered with a roof supported by pillars.

Furthermore, in the above embodiment, the waste collection section 12 was installed on a slope, but being on a slope is not an essential condition.
Any structure may be used as long as it can lead contaminated water to the sewage treatment device 32 through the liquid guide pipe 18 and collect rainwater.

1. As is clear from the above explanation, in the waste disposal site of the present invention, the waste is covered with a rainwater shield from above with or without contact, and the parts that come into contact with the waste are covered with rainwater shielding bodies. In this case, the part that is not treated as waste has a fluid replacement function, but the part that is not treated as waste does not have a fluid replacement function. Since the structure is configured so that the rainwater collected by the liquid membrane is discharged outside the waste disposal site using a rainwater discharge means, rainwater does not mix with the waste, and the amount of sewage treated due to rainwater is prevented from increasing. Because the quality of contaminated water is stable, it is not only easy to treat, but there is no need to increase the size of the sewage treatment H@, reducing construction and maintenance costs. be converted into

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view of a waste disposal site according to an embodiment of the present invention, FIG. 2 is a plan view of the main part thereof, and FIG. 3 is a longitudinal sectional view of a liquid conduit in a waste accumulation part. Fig. 4 is a radial cross-sectional view of the liquid conduit, Fig. 5 is a radial cross-sectional view of the liquid conduit in the undisposed part of the waste disposal site, and Fig. 6 is a rainwater shield covering the waste. FIG. 7, a longitudinal cross-sectional view showing a connection and extension mode of the membrane, is a view similar to FIG. 5 according to the embodiment of Haku. 10...Waste disposal site, 12...Waste accumulation section, 1
3... Undumped waste area, 14... Embankment wall, 16...
Layer, 18... Liquid guide pipe, 20... Branch pipe, 22...
Main pipe, 24... Replenishment hole, 26... Sediment inflow prevention material,
28...Waterproof membrane, 29...Nonwoven fabric, 30...Rainwater shielding membrane, 32...Sewage treatment device, 34...Rainwater discharge means, 40...Waste, A... Waste dumping location.

Claims (1)

[Claims] In a waste disposal site where a liquid-shielding membrane is laid down and a sewage treatment device is installed to treat contaminated water flowing out from the waste, the waste is treated from above with or without contact. A rainwater shield is attached to the surface of the liquid-shielding membrane to cover, and has a fluid replacement function in the part that comes into contact with the waste, but does not have a fluid replacement function in the part that does not come into contact with the waste, and the part that does not come into contact with the waste does not have a fluid replacement function, so that it flows out from the waste. A waste disposal site comprising a liquid conduit pipe for guiding contaminated water to a sewage treatment device, and a rainwater discharge means for discharging rainwater collected by the liquid-shielding membrane outside the waste disposal site.