JP2004337675A - Method for quickly stabilizing waste in waste disposal site - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stabilization promotor for waste in a waste disposal site by which waste can be stabilized at an early stage. <P>SOLUTION: In the method of stabilizing waste 20 in a waste disposal site 10, a stabilization promotor 30 comprising at least one selected from hydrogen peroxide, ozone, potassium permanganate, ferric chloride, ferric sulfate and chlorine is fed into the waste 20, and the waste 20 is subjected to oxidation or decomposition or both of them. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for stabilizing waste at an early stage, and particularly to a method for reducing waste at a final disposal site for general waste and industrial waste, a waste storage facility, a soil contamination site, an inappropriate disposal site, and an illegal dumping site. It relates to an early stabilization method.
[0002]
[Prior art]
2. Description of the Related Art In recent years, with the development of industry and the expansion of a high consumption economy, the types and amounts of industrial waste and waste generated from general households have been increasing.
For this reason, waste disposal methods have become a social problem.
Today, it is common practice to collect and reclaim waste at one location, but the increasing amount of waste has little impact on the earth, However, the role of landfills at present is not only a role as a landfill for wastes, but also a function to stabilize wastes and also to fulfill a function of actively treating them. For this reason, in landfill sites, the biodegradation of microorganisms is promoted by supplying moisture through waste, such as rainfall or water sprinkling, and supplying air through leachate collection and drainage pipes and vent pipes. Stabilization of organic matter in waste has been performed.
In addition, harmful substances such as heavy metals are washed out with leachate to stabilize them.
[0003]
[Problems to be solved by the invention]
The above-mentioned conventional method for stabilizing waste in a waste disposal site has the following problems.
<B> It takes a long time for the dumped waste to stabilize.
For this reason, there are many problems such as a delay in the use of the site, an increase in the burden on the seepage control and an increase in the management cost of the disposal site, and an increase in anxiety given to the local residents.
<B> Further, in such a stabilization method, it is difficult to predict the time until the waste is stabilized, and this is a factor that further anxifies the residents in the vicinity of the treatment plant.
[0004]
[Object of the invention]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a method for stabilizing waste in a waste disposal site, which can stabilize waste early. And
It is another object of the present invention to provide a method for stabilizing waste in a waste disposal site, in which the time until the waste is stabilized can be predicted.
The present invention achieves at least one of these objects.
[0005]
[Means for Solving the Problems]
In order to achieve the object as described above, the method for stabilizing waste in a waste disposal site of the present invention in an early stage is a method for stabilizing waste in a waste disposal site at an early stage. Hydrogen peroxide, ozone, potassium permanganate, ferric chloride, ferric sulfate, supplying a stabilizing accelerator containing at least one of chlorine, for the waste, oxidation or decomposition, or It is characterized by performing both of these processes. As a result, the elution of harmful substances such as heavy metals present in the waste is promoted, and the stabilization of the waste can be promoted by performing the stabilization treatment on the water treatment side.
Here, the waste disposal site includes a final disposal site for general waste and industrial waste, a waste storage facility, a soil contamination site, an inappropriate disposal site, an illegal dumping site, and the like.
[0006]
In addition, the method for early stabilization of waste in a waste disposal site according to the present invention is the method for early stabilization of waste in a waste disposal site described above, wherein the stabilizing agent is supplied into the waste. A supply pipe is provided, and the stabilization accelerator is supplied through the supply pipe.
[0007]
In addition, the method for early stabilization of waste in a waste disposal site according to the present invention is the method for early stabilization of waste in a waste disposal site described above, wherein the stabilizing agent is supplied into the waste. A supply pipe and an extraction pipe for extracting the treated stabilization accelerator are arranged, and after passing the stabilization accelerator supplied from the supply pipe through the waste, the treated stabilization accelerator is treated. It is characterized in that it is extracted with the extraction tube as an agent.
Here, the treated stabilization accelerator refers to a stabilization accelerator after waste is subjected to oxidation or decomposition or both treatments. It also extracts the stabilization accelerator for the treatment and also the leachate.
[0008]
Further, the method for early stabilization of waste in a waste disposal site according to the present invention is the method for early stabilization of waste in a waste disposal site described above, wherein the amount of the stabilization promoter is contained inside the waste. A plurality of sensors to be detected are installed, and based on data detected by each of the sensors, one or both of the supply amount of the stabilization promoter and the extraction amount, or both are controlled. Things.
[0009]
Embodiment 1 of the present invention
In the present embodiment, a method for stabilizing the waste 20 will be described below for the waste 20 buried in the waste disposal site 10.
[0010]
<A> Overall Configuration The present invention is a method for stabilizing a waste 20 at an early stage by supplying a stabilization accelerator 30 to the waste 20.
As shown in FIG. 1, the stabilization accelerator 30 is supplied into the waste 20 via a supply pipe 40 arranged vertically to the waste 20, and passes through the waste 20 to stabilize the waste 20. After the treatment, the leachate is extracted from the waste 20 using the existing leachate collection and distribution pipe 51 and discharged to the outside.
Hereinafter, each part will be described in detail.
[0011]
<B> Stabilization accelerator The stabilization accelerator 30 stabilizes the waste 20 at an early stage, and a specific method is performed by oxidizing or decomposing the waste 20, or both.
The stabilization accelerator 30 contains at least one of hydrogen peroxide, ozone, potassium permanganate, ferric chloride, ferric sulfate, and chlorine. Indicates a liquid, ozone indicates a gas, and potassium permanganate indicates a liquid, which are configured to be able to pass through the gap of the waste 20.
[0012]
The stabilization accelerator 30 oxidizes and decomposes organic substances, and also has the effect of promoting the decomposition of humic acid and the like, which is difficult to decompose biologically.
Hydrogen peroxide also has the effect of oxidizing and decomposing hydrogen sulfide gas, ammonia, methyl mercaptan, methylamine and the like, and suppressing the generation of malodorous substances.
[0013]
<C> Supply pipe The supply pipe 40 is a pipe for supplying the stabilization accelerator 30 into the waste 20.
As the supply pipe 40, for example, a pipe body having a part of the peripheral surface having a perforated structure can be used, and the stabilization accelerator 30 is supplied from each of the holes 41, 41. In such a case, the direction in which the holes 41 are formed may be provided perpendicular to the axial direction of the supply pipe 40, or may be formed at other angles.
The supply pipe 40 can be made of, for example, a material made of steel, stainless steel, vinyl chloride, polyethylene, or the like, and is preferably one that is hardly corroded by the influence of microorganisms or the like.
In addition, the supply pipe 40 does not necessarily need to be newly provided, and the existing leachate collection / drainage pipe 51 or a degassing pipe (not shown) may be used instead or in combination.
[0014]
<D> Extraction tube The extraction tube 50a is a pipe for extracting the treated stabilization accelerator 31 obtained by stabilizing the waste 20 and discharging the same to the ground.
The extraction tube 50a has, for example, a part of the peripheral surface formed in a perforated structure so that the treated stabilization accelerator 31 in the waste 20 can be extracted. In such a case, the waste 20 is prevented from entering the inside of the extraction tube 50a through the hole.
The extraction tube 50a can be made of, for example, steel, stainless steel, vinyl chloride, polyethylene, or the like. When the inside of the tube is set to a negative pressure, it can be cut off, and is affected by external factors such as bacteria. Difficult ones are preferred.
It is not always necessary to newly provide the extraction pipe 50a, and the existing leachate collection / drainage pipe 51 or an unillustrated degassing pipe may be used instead or in combination.
The target object extracted by the extraction pipe 50a includes, in addition to the treated stabilization accelerator 31, an untreated stabilization accelerator 30 and leachate such as rainwater.
[0015]
【Example】
Next, a method for stabilizing the waste 20 in the waste disposal site 10 will be described.
[0016]
<A> Installation of supply pipe In this embodiment, a stabilization method for the waste 20 is implemented in a waste disposal site 10 in which a water shield 11 is provided on the ground and a leachate collection / drainage pipe 51 is laid at the bottom. .
The waste 20 to be accommodated in the seepage control 11 is a mixture of the waste 20 and a cover soil, and the leachate collection / drainage pipe has one end penetrating through the seepage control 11 and disposed outside. 51 are installed. Then, the leachate collection / drainage pipe 51 is used as an extraction pipe 50a for discharging the treated stabilization accelerator 31, the other stabilization accelerator 30, the leachate such as rainwater, etc. in the waste 20 to the outside.
[0017]
Further, a supply pipe 40 is provided for the waste 20 in a substantially vertical direction from the ground. In this embodiment, a supply pipe 40 in which a supply unit branches into two for one supply port is used.
A plurality of holes 41, 41,... Are formed in the peripheral surface of the supply pipe 40 disposed in the waste 20 toward the depth direction, and the stabilizing agent 30 is formed from the holes 41, 41,. Discharged.
[0018]
<B> Supply of stabilization accelerator Next, the stabilization accelerator 30 is supplied into the waste 20. In this example, hydrogen peroxide is used as the stabilization accelerator 30.
When the stabilization accelerator 30 is supplied to the supply pipe 40, the stabilization accelerator 30 is supplied in all directions from the holes 41, 41,... Of the supply pipe 40 provided in the depth direction toward the waste 20.
At this time, by feeding the stabilization accelerator 30 into the supply pipe 40 while pressurizing, the stabilization accelerator 30 is forcibly discharged into the waste 20, and the permeation into the waste 20 is reduced. The stabilization can be carried out earlier, and thus in a shorter time.
The stabilization accelerator 30 supplied into the waste 20 permeates into the waste 20 while spreading in a substantially cylindrical shape through the gap between the wastes 20.
[0019]
<C> Stabilization of waste The stabilization accelerator 30 gradually spreads out and leaches into the waste 20, and eventually spreads throughout the waste 20.
The stabilization accelerator 30 promotes the oxidation of the organic matter in the waste 20, decomposes the organic matter into a stable substance, and further oxidizes and decomposes a substance causing a bad smell and spreads.
In addition, the hydrogen sulfide gas in the waste 20 is decomposed, and further promotes the decomposition of humic acid and the like, which is considered to be biologically difficult to decompose.
The stabilization accelerator 30 that has processed the waste 20 becomes a treated stabilization accelerator 31 and moves or stops inside the waste 20.
[0020]
<D> Extraction of the treated stabilization accelerator Next, the treated stabilization accelerator 31 in the waste 20 is discharged.
Simultaneously with the supply of the stabilization accelerator 30, or before or after, the inside of the leachate collection / drainage pipe 51 is sucked to make a negative pressure. At this time, the pressure in the leachate collection / drainage pipe 51 is adjusted to be lower than the pressure in the waste 20 and the supply pipe 40. Then, a convection toward the leachate collection drainage pipe 51 occurs in the waste 20, and the treated stabilization promoter 31 and the stabilization promoter 30 in the waste 20 are transferred to the leachate collection drainage pipe 51 together with the leachate. Move toward. That is, the treated stabilization accelerator 31 in the waste 20 has the lateral kinetic energy received during supply into the waste 20 and the oblique downward attractive force received from the leachate collection / drainage pipe 51, The treated stabilization accelerator 31 moves in the direction shown by the arrow in FIG.
In this way, the stabilization accelerator 30 that has spread to every corner of the waste 20 is collected as a treated stabilization accelerator 31. Further, since the arrangement relationship between the extraction pipe 50a and the supply pipe 40 is three-dimensionally intersected, the stabilization accelerator 30 is more easily distributed throughout.
Then, the treated stabilization accelerator 31 and the leachate that have reached the leachate collection / drainage pipe 51 are leached into the pipe through the respective holes, discharged to the ground, and subjected to detoxification treatment by a treatment facility (not shown). And process.
[0021]
As described above, in the present invention, the stabilization of the waste 20 is performed by the supply of the stabilization accelerator 30, so that the period until the waste 20 is stabilized can be artificially adjusted. Further, by changing the components of the stabilizing agent 30 depending on the type of the waste 20, stabilization can be achieved more efficiently.
As a result, the waste disposal site 10 can be used as a former land use at an early stage, and the time required for the site to be completely closed is shortened, so that the management cost can be reduced, and furthermore, the treatment for stabilizing the waste 20 If the capacity is increased, it is possible to cope with the increased amount of waste 20 and, consequently, to reduce the storage space of the waste disposal site 10.
[0022]
Embodiment 2 of the present invention
In the above description, the extraction of the stabilization accelerator 30 supplied into the waste 20 is performed using the existing leachate collection / drainage pipe 51. In the present embodiment, the means for extracting the stabilization accelerator 30 is used. In this embodiment, the extraction tube 50b is provided separately (FIG. 2).
[0023]
In the present embodiment, ozone is used as the stabilization accelerator 30. When a gas such as ozone is used as the stabilization accelerator 30, the waste 20 can be stabilized without increasing the amount of leachate in the waste 20.
The extraction pipe 50b is disposed vertically downward with respect to the waste 20, extracts the treated stabilization accelerator 31 from a plurality of holes formed in the peripheral surface, and discharges the same to the ground.
By providing the holes from the surface layer of the waste 20 to the deep layer in this way, the treated stabilization accelerator 31 can be extracted mainly over the entire area in the depth direction. This is because the stabilization accelerator 30 supplied from the supply pipe 40 is extracted from the hole of the extraction pipe 50 located at substantially the same height or above each depth, that is, the stabilization accelerator 30 is contained in the waste 20. Is extracted in a substantially horizontal direction or its upper part due to its floating property. Particularly, by using gas for the stabilization accelerator 30, the portion near the surface layer of the waste 20 can be more reliably stabilized. Can be.
The number of the extraction tubes 50 can be set arbitrarily as needed. Further, an existing degassing pipe may be used as the extraction pipe 50.
[0024]
Third Embodiment of the Invention
Further, the method of supplying the stabilizing agent 30 may be a method of spraying from the upper part of the waste 20 toward the surface layer of the waste 20 as shown in FIG. 3 without using the supply pipe 40.
As a means for spraying, a known sprinkler or the like can be used.
[0025]
Embodiment 4 of the present invention
Hereinafter, other embodiments will be described. In the description, the same portions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0026]
As shown in FIG. 4, sensors 60, 60,... For detecting the amount of the stabilizing agent 30 are disposed at a plurality of locations in the waste 20.
The sensor 60 is a device for measuring the amount of the stabilization accelerator 30 contained in the waste 20, and for example, a stabilization for extracting the stabilization accelerator 30 into a tube having a plurality of holes 61 provided on a peripheral surface thereof. Anything that measures the amount of accelerator 30 can be used.
This sensor 60 is provided at a plurality of locations of the waste 20 to detect the amount of the stabilizing agent 30 at each point, and by changing the positions of the holes 61 provided in the sensor 60, stabilization at each depth is achieved. The penetration of accelerator 30 is measured.
By using the measured value as a guide and adjusting the supply amount and / or the discharge amount of the stabilization accelerator 30, the stabilization accelerator 30 can be distributed to the details of the waste 20, And the whole waste 20 can be reliably stabilized.
[0027]
As a method of adjusting the supply amount of the stabilization accelerator 30, for example, an open / close valve or a pressurizing pump 43 is provided in the middle of the supply pipe 40, or the storage tank 42 of the stabilization accelerator 30 is set at a high position. In this case, a method of increasing the supply pressure of the stabilization accelerator 30 can be adopted.
[0028]
In addition, the data obtained by each of the sensors 60, 60,..., The supply pipe 40, and the extraction pipe 50 are linked and managed collectively, so that the circulation amount of the stabilization accelerator 30 in the waste 20 can be automatically adjusted. It may be.
Note that the sensor 60 does not need to be permanently provided in the waste 20, and the measurement point may be changed by moving the location as needed.
In addition, a mode in which the sensor 60 is installed in the waste 20 and measured only when necessary may be adopted.
[0029]
Embodiment 5 of the present invention
Further, as shown in FIG. 5, the supply pipe 40 may be arranged along the bottom surface of the water shield 11, and the extraction pipe 50 may be provided in parallel above the supply pipe 40.
Around the supply pipe 40 and the extraction pipe 50, gas permeable layers 401 and 501 that allow the stabilization accelerator 30 to pass therethrough are provided, respectively.
[0030]
The stabilization accelerator 30 supplied from the supply pipe 40 moves from the bottom to the top of the waste 20. Since the supply pipe 40 is disposed substantially at the bottom of the water shield 11, the waste 20 that tends to be maintained in an anaerobic atmosphere can be reliably stabilized.
In such a form, the stabilization accelerator 30 can be selected and used regardless of liquid or gas.
In addition, the role of the supply pipe 40 and the extraction pipe 50 of this embodiment may be changed, and the stabilization promoter 30 may be supplied from the upper extraction pipe 50 and extracted by the supply pipe 40 located below.
If the supply and discharge of the stabilization accelerator 30 are alternately switched in each of the pipes 40 and 50, the stabilization accelerator 30 can be supplied without displacing the permeation path of the stabilization accelerator 30.
It is more preferable to arrange the supply pipe 40 and the extraction pipe 50 in an intersecting positional relationship in the projection view in which the waste 20 is viewed from above from the viewpoint of stabilizing the entire waste 20.
[0031]
Embodiment 6 of the present invention
A method of supplying the stabilizing accelerator 30 of a type different from that of the first embodiment will be described with reference to FIG.
[0032]
The supply pipe 40a used in the present embodiment has a form in which a digging portion 45 such as an auger is provided at a tip portion, and a supply hole for the stabilizing agent 30 is provided near the digging portion 45 (FIG. 6A). .
If this supply pipe 40a is used, it can be supplied over a wide range by excavating the supply pipe 40a into the waste 20 while injecting the stabilization accelerator 30 at high pressure. In such a form, it is not necessary to provide a drilling hole for arranging the supply pipe 40a in advance.
[0033]
In addition, as another supply pipe 40b, an ejection hole for the stabilization accelerator 30 provided on the peripheral surface of the supply pipe 40b is drilled obliquely upward, and the stabilization accelerator 30 is injected obliquely upward. By doing so, the stabilization accelerator 30 can be supplied over the details of the waste 20 (FIG. 6B).
[0034]
Further, the distal end of the supply pipe 40c is formed in a T-shape, and the high-pressure stabilization accelerator 30 is sprayed downward from the hole provided in the bent portion 44, whereby the lower waste 20 is discharged. Excavation can be performed while stirring (FIG. 6 (c)).
[0035]
【The invention's effect】
Since the method for stabilizing waste in a waste disposal site according to the present invention at an early stage is as described above, the following effects can be obtained.
<A> The present invention forcibly adds a stabilizing agent containing at least one of hydrogen peroxide, ozone, potassium permanganate, ferric chloride, ferric sulfate and chlorine to waste. Since it can be supplied, waste can be stabilized efficiently and in a short time.
<B> In addition, since the supply of such a stabilizing agent can be artificially operated, it is possible to predict the time until the waste is stabilized.
[Brief description of the drawings]
FIG. 1 is an explanatory view of Embodiment 1 of a waste stabilization method of the present invention.
FIG. 2 is an explanatory diagram of Embodiment 2 of a waste stabilization method.
FIG. 3 is an explanatory view of Embodiment 3 of a waste stabilization method.
FIG. 4 is an explanatory view of Embodiment 4 of a waste stabilization method.
FIG. 5 is an explanatory view of Embodiment 5 of a waste stabilization method.
FIG. 6 is an explanatory view of Embodiment 6 of a waste stabilization method.
[Explanation of symbols]
10. ・ Waste treatment plant 20 ・ ・ Waste 30 ・ ・ Stabilization accelerator 40 ・ ・ Supply pipe 50 ・ ・ Extraction pipe 60 ・ ・ Sensor

Claims (4)

In the method of stabilizing the waste at the waste disposal site early,
In the waste, hydrogen peroxide, ozone, potassium permanganate, ferric chloride, ferric sulfate, supplying a stabilizing accelerator containing at least one of chlorine, for the waste A method for early stabilization of waste in a waste disposal site, wherein the method has been subjected to oxidation, decomposition, or both treatments. A method for stabilizing waste in a waste disposal site according to claim 1,
A supply pipe for supplying the stabilizing agent is arranged inside the waste,
A method for early stabilization of waste in a waste disposal site, characterized in that the stabilizing agent is supplied through the supply pipe. A method for stabilizing waste in a waste disposal site according to claim 1,
Inside the waste, a supply pipe for supplying the stabilization accelerator, and an extraction pipe for extracting the treated stabilization accelerator,
After passing the stabilization accelerator supplied from the supply pipe through the waste, extracting the treated stabilization accelerator with the extraction pipe as a treated stabilization accelerator, waste in a waste disposal site. Early stabilization method. An early stabilization method for waste in a waste disposal site according to any one of claims 1 to 3,
Inside the waste, a sensor for detecting the amount of the stabilizing agent is installed at a plurality of locations,
Based on the data detected by each of the sensors, the supply amount of the stabilization accelerator, or one of the extraction amount, characterized by controlling both, early waste in the waste disposal site Stabilization method.

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