JPH0335996B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a waste dumping facility structure for treating organic matter in waste, a method of using the same, and a ventilation pipe for decomposing organic matter used therein.

<Conventional technology> Conventionally, in order to dispose of industrial waste,
A water-blocking sheet is laid on the landfill, and a filter layer is placed from the top edge of the water-blocking sheet to the bottom of the landfill.
Dumping facility structures have been proposed that allow waste and other filter layers to be alternately dumped and laid on top of this filter layer.

According to this dumping facility structure, muddy water containing heavy metals and organic matter in the waste is leached into each filter layer, and the sewage that has leached into the filter layer is guided to the filter layer on the water-shielding sheet, and finally The waste is collected at the bottom of the landfill on a water-shielding sheet and discharged outside the landfill through perforated water collection pipes, where it can finally be subjected to chemical treatment. In addition,
The filter layer is made of sand, gravel, etc. that filters solid matter, or is used by wrapping it in a screen material.

<Problems to be solved by the invention> In such a conventional dumping facility structure, it is not possible for aerobic bacteria to decompose the organic matter that accumulates due to the dumping of waste; It is necessary to pump air into the waste for this purpose. Further, when sewage leached from waste due to rainwater flows into each of the filter layers, the organic matter flowing out together with the sewage clogs the filter layers, which impedes the effectiveness of draining the sewage.

Furthermore, in conventional dumping facility structures, ground subsidence and natural subsidence of piled up waste can cause the ventilation pipes to buckle, crack or become damaged, and eventually decompose the organic matter. There was a problem with it disappearing.

This invention was made by focusing on such conventional problems, and in addition to making it possible for organic matter in waste to be decomposed by aerobic bacteria, the ventilation pipe for pumping air is connected to a plurality of unit pipes. Each joint is temporarily fixed with a stopper, and the waste is thrown into the ground to bury it underground. When the ground subsides, the stopper is destroyed, and this acts on the connected ventilation pipes. It is an object of the present invention to provide a structure for a waste dumping facility, a method for using the same, and a ventilation pipe for decomposing organic matter that eliminates stress and prevents the buckling of the ventilation pipe and damage caused by this. do.

<Means for Solving the Problems> The gist of the structure of the waste dumping facility according to the present invention is that a water-blocking sheet is laid over the entire inner surface of the waste landfill, and on top of this water-blocking sheet, In a waste dumping facility structure in which a filter layer is provided from the edge to the bottom of the landfill, and a waste layer and another filter layer are alternately laminated on the filter layer to dump waste, the filter layer on the water-shielding sheet is The waste is characterized by being provided with a ventilation pipe which stands upright from the layer and intersects each of the filter layers, and has a ventilation hole whose upper end is opened above the ground so that air can be pumped to each filter layer. Located in a dumping facility structure. In addition, in order to use this dumping facility structure, air is forced into the required locations of the filter layer from the ventilation pipe.
This is done by breeding aerobic bacteria to decompose organic matter in the filter layer. Furthermore, the structure of the above-mentioned ventilation pipe is composed of a plurality of unit pipes with different large and small diameters, and a stopper member that joins them upward. When faced with the pressure of
By breaking the stopper member, one of the small-diameter unit tube and the large-diameter unit tube falls inside or outside the other, thereby preventing breakage.

<Function> In this invention, unit tubes of the ventilation tube provided with ventilation holes are made to face the filter layer, waste is dumped around this, and the unit tubes are connected while being connected upward to connect the filter layer and the waste layer. Through communication, pressurized air is applied to the filter layer, allowing aerobic bacteria to grow and decompose organic matter. In addition, since the ventilation pipe used in this invention has large-diameter and small-diameter unit pipes connected by a stopper member, this ventilation pipe is subject to downward stress due to ground subsidence or subsidence of laminated industrial waste. , the above-mentioned stopper member will immediately break, preventing the downward stress transmission from one (upper) unit pipe to the other (lower) unit pipe, and each unit pipe will be able to maintain its structure without causing any mutual strain. Promotes the growth of aerobic bacteria and enables the decomposition of organic matter in the filter layer.

<Embodiment of the Invention> An embodiment of the invention will be described below with reference to the drawings. In FIG. 2, 1 is a landfill, and the entire inner surface of this landfill 1 has been torn with a water-blocking sheet 2.
3 is a filter layer made of coral material or the like provided from the upper edge of the water-blocking sheet 2 to the bottom of the landfill. At the bottom of the filter layer 3 at the bottom of the landfill, there is a corrosion-resistant water collection pipe 4 with many small holes. is buried.
5 is the waste dumped on this filter layer 3,
Another filter layer 6 is interposed for each predetermined amount of accumulated waste 5, and the waste 5 and other filter layer 6 form a multi-layered structure as a whole. Reference numeral 7 denotes a ventilation pipe having a large number of ventilation holes 8, and a plurality of these ventilation pipes 7 are buried in the landfill 1. The ventilation pipe 7 for burying is erected at the same time as the waste 5 is put in, but it can also be done at any time after the waste 5 is put in. At this time, the upper end of the ventilation pipe 7 is opened to the atmosphere, the lower end is made to face into the filter layer 3, and the ventilation hole 8 is made to face the filter layer 6 having a layered structure. Note that the ventilation pipe 7 is vertically installed.

1 and 3 show details of the vent pipe 7. FIG.
This ventilation pipe 7 is made up of a plurality of short unit pipes 7 of large diameter and small diameter.
For example, by fitting the outer circumference of the upper end of the unit tube 7b into the inner circumference of the lower end of the unit tube 7a, as shown in FIG.
In one or some of the vent holes 8a, 8b of the unit pipes 7a, 7b, a stop member 10 made of hard rubber or the like that easily breaks when a downward pressure exceeding a predetermined pressure is applied to either the unit pipes 7a, 7b is installed. It's embedded.

Next, the operation will be explained.

In the structure of the waste disposal facility for waste 5, sewage leached from the waste 5 in each layer is led to the filter layer 6 of each layer, and the filter layer on the water-blocking sheet 2 continuous to the periphery of each filter layer 6 is introduced. The water is transmitted to the layer 3, flows down from the top to the bottom, and is finally discharged to a predetermined location outside the ground through the water collection pipe 4 at the bottom of the landfill, where it is subjected to necessary treatment. In this case, since the vent holes 8 of the vent pipe 7 also face each filter layer 6, a part of the wastewater contained in these filter layers 6 flows out into the filter layer 3 through the vent pipe 7. can be done.

On the other hand, since the upper end of the ventilation pipe 7 communicates with the atmosphere, it is possible to forcefully supply air through the ventilation hole 8 to the filter materials of the filter layers 3 and 6 that have become clogged with organic matter in the wastewater. can. Therefore, the growth of aerobic bacteria is promoted, the decomposition of the organic matter is promoted, and the clogging of the filter material with organic matter can be effectively eliminated, and the intended passage of sewage through each filter layer 3, 6 is improved. Sewage treatment can be carried out.

In order to make the decomposition of organic matter by the aerobic bacteria more efficient, it is desirable to forcibly inject air from the upper end of the ventilation pipe 7 using a pump or the like. In this case, the forcibly fed air may blow through the ventilation pipe 7 and leak into the waste 5, and may not be sufficiently supplied to the desired filter layer. If a gas stopper such as a packer is placed in the ventilation pipe 7 across the area where the air is to be removed, and air is sent through a tube with one end open between the air stopper, the decomposition of organic matter within the filter layer at the above-mentioned required locations can be prevented. Can be implemented efficiently. Further, the vent pipe 7 can also be used as a pipe for recovering gas from decomposition of organic matter.

By the way, it is extremely difficult to install a long piece of the ventilation pipe 7 on the filter layer 3 on the water-blocking sheet 2 from the beginning, and it is also difficult to install a long one on the filter layer 3 on the water-blocking sheet 2. Therefore, it is conceivable that the ventilation pipe 7 may buckle and be damaged. However, ventilation pipe 7
Apply a slipping material such as asphalt to the outer periphery of the
Although it is possible to prevent the force associated with ground subsidence from directly acting on the ventilation pipe 7, it is not possible to provide small holes in the ventilation pipe itself, resulting in poor drainage and ventilation.

Since the present invention is configured as shown in FIGS. 1 and 3 and as described above, it is possible to prevent the buckling described above and the damage and cracks that occur in connection therewith.

That is, when the ground subsidence or the subsidence of the waste 5 occurs, when the unit pipe 7a receives a circumferential force of a predetermined pressure or more (a downward force acts on the pipe due to the subsidence of the waste layer), The stop member 10 is the unit pipe 7
The unit pipes 7a and 7b are cut by the shear force applied thereto, and the frictional force on the circumferential surface of the pipes due to the compressive force exerted by each unit pipe 7a and 7b on the other is released. As a result, damage to the ventilation pipe 7 made up of the unit pipes 7a and 7b can be effectively prevented. The stopper member 10 may be a pin-shaped member that communicates with both the ventilation holes 8a, 8b, or a member that protrudes from the inner periphery of the larger diameter unit tube or the outer periphery of the smaller diameter unit pipe 7a, 7b. Projecting members are used, and their material may be plastic, cork, or the like in addition to the above-mentioned hard rubber. And such unit pipe 7
a, 7b are added via the stopper member 10 before and after the waste material 5 is dumped, making it possible to install the ventilation pipe 7 as desired.

In addition, when coral materials with different particle sizes are used as the filter materials for the filter layers 3 and 6, in order to prevent solids and particles from directly clogging them, the coral materials are covered with a screen material. It is desirable to cover or wrap the coral material and to prevent clogging of the coral material by fine particles.
If the screen material is flocked with flocks, the flocks will fall down and partially cover the eyes of the screen material. In this case, it is necessary to use flocked hair that is strong enough to not cut even when a bulldozer runs over the screen material.

In addition, since the ventilation pipe 7 is a combination of a plurality of unit pipes 7a and 7b that move relative to each other as described above, this ventilation pipe 7 is buried in the waste 5 or embankment, and the subsidence measurement is carried out therein. By installing a device, it is possible to detect the above-mentioned relative movement and measure the existence or magnitude of ground subsidence.

Furthermore, by burying the vent pipe 7 in liquefied ground, the pore water pressure of the sandy ground can be dissipated through the vent pipe, and it can also be used for purposes such as strengthening the ground.

<Effects of the Invention> As described above, according to the present invention, since the ventilation pipe is provided to intersect with the filter layer laminated together with the waste layer, the sewage seeping from each waste layer is transferred to each filter layer. When the organic matter in each filter layer is decomposed by aerobic bacteria by pumping air to each filter layer through the ventilation hole of the ventilation pipe, the organic matter in each filter layer is decomposed by aerobic bacteria. It can eliminate clogging caused by organic matter and promote wastewater discharge. Furthermore, if necessary, a gas stopper is installed in the ventilation pipe to prevent air from leaking into the waste layer or flowing into other filter layers, and by sending air only to an arbitrary layer of each filter layer. It is possible to decompose organic matter according to the degree of clogging of the filter layer and promote more efficient discharge of wastewater. In addition, since the ventilation pipe is constituted by a plurality of unit pipes of large and small diameters connected by a stop member, when any of the unit pipes is lowered due to stress due to ground subsidence, etc., the stop member The vent pipe can be protected by breaking the pipe and quickly releasing the stress.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a ventilation pipe in the structure of a waste dumping facility according to the present invention, FIG. 2 is a cross-sectional view showing the structure of the dumping facility, and FIG. 3 is a partial cross-section showing the connection structure of the ventilation pipe. It is a diagram. 7...Vent pipe, 7a, 7b...Unit pipe, 8a, 8b
...Vent hole, 10...Stopping member.

Claims (1)

[Claims] 1. A water-shielding sheet is laid over the entire inner surface of a waste landfill, a filter layer is provided on the water-shielding sheet from the upper edge of the sheet to the bottom of the landfill, and the waste is disposed of on the filter layer. In a waste dumping facility structure in which a filter layer and other filter layers are alternately stacked and waste is dumped, the filter layer is erected from the filter layer on the water-shielding sheet, intersects with each filter layer, and has an upper end. A waste dumping facility structure characterized by being equipped with a ventilation pipe having ventilation holes that opens above the ground and allows air to be pumped to each filter layer. 2 A water-blocking sheet is laid over the entire inner surface of a waste landfill, a filter layer is provided on the water-blocking sheet from the upper edge of the sheet to the bottom of the landfill, and a waste layer and other filters are placed on top of the filter layer. The layers are alternately laminated, and a ventilation hole is provided upright from the filter layer on the water-shielding sheet to intersect with each filter layer, and has an upper end opened above the ground to enable air to be pumped to each filter layer. A method of utilizing a waste dumping facility structure equipped with a ventilation pipe having a vent pipe, wherein air is forcedly fed through the ventilation pipe to an arbitrary filter layer, thereby propagating aerobic bacteria and discharging the filter layer. A method of utilizing a waste dumping facility structure characterized by decomposing organic matter inside. 3. A water-blocking sheet is laid over the entire inner surface of a waste landfill, a filter layer is provided on the water-blocking sheet from its upper edge to the bottom of the landfill, and a waste layer and other filters are placed on top of the filter layer. A ventilation pipe for decomposing organic matter, which is used in a waste dumping facility structure in which layers are alternately laminated and waste is dumped, and is equipped with ventilation holes communicating with each of the filter layers on the water-shielding sheet. If the ventilation pipe is made up of a plurality of unit pipes of different large and small diameters joined upwardly by a stopper member, and the ventilation pipe receives downward pressure equal to or higher than a predetermined pressure between any of the layers, the above-mentioned A ventilation pipe for organic matter decomposition used in a waste dumping facility structure, which prevents damage by causing one of the small-diameter unit pipe and large-diameter unit pipe to fall inside or outside the other when the stopper member is damaged. .