JP2001145872A - Method and apparatus for cleaning polluted ground or waste landfill ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the cleaning capacity of the polluted ground to a large extent by intermittently injecting a cleaning accelerating component in the polluted ground (including even waste landfill ground) at a short-time interval in a pulse-like manner under ultrahigh pressure to explosively blow the same in the polluted ground to allow the cleaning accelerating component to reach over a remoter and wider range. SOLUTION: A cleaning accelerating component is intermittently supplied to the injection well 14 inserted in the polluted ground 12 under ultrahigh pressure at a short-time interval in a pulse-like manner and injected in the polluted ground 12 from the jet orifices 14a of the injection well 14 under ultrahigh pressure in predetermined intermittent timing. By this constitution, the cleaning accelerating component is explosively blown in the polluted ground 12 by labyrinth effect to be allowed to reach over a remoter and wider range.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contaminated ground or a waste landfill (hereinafter referred to simply as "contaminated ground").
In particular, a method and apparatus for purifying wastewater, in particular, by injecting ultra-high pressure air from an injection well inserted into a contaminated ground or a waste landfill into a pulsed manner at short intervals to intermittently blow the air into the contaminated ground. The present invention relates to a method for purifying a ground or a waste landfill and a purification device therefor.

[0002]

2. Description of the Related Art Pollutants include various substances such as organochlorine compounds, oils, and other heavy metals.
Grounds and waste landfills contaminated with contaminants including organic decomposition components other than these contaminants have become a major problem. Here, in this specification, the term "contaminated ground" includes the landfill of waste.

In recent years, various methods and apparatuses for purifying the above pollutants have been proposed, and in-situ purification, which is particularly advantageous in terms of equipment and space, is often found. In this in situ purification, there is a method (bioremediation) that utilizes indigenous decomposed microorganisms. In order to activate these decomposed microorganisms, nutrients such as air (oxygen) and nutrients are injected into the ground, In some cases, it has been proposed to replenish degrading microorganisms. For example, JP
JP-A-216696 discloses an apparatus for supplying oxygen to contaminated soil. This is to set up an injection well that reaches the groundwater under the contaminated soil, supply supersaturated water containing excess oxygen into the groundwater from this injection well, and make the groundwater oxygen supersaturated,
Micro bubbles are generated from this oxygen supersaturated groundwater to supply oxygen to the contaminated soil on the surface.

[0004]

However, when oxygen is supplied to contaminated soil from such conventional groundwater, indigenous decomposing microorganisms are activated by the natural infiltration of oxygen into the soil. However, it requires a very long purification period, and the soil has cracks and soft spots, which are not uniform. Can not be purified.

It is also considered that an injection well is inserted into contaminated soil, and oxygen (air) or other decomposing promoting substances and purification promoting components such as decomposing microorganisms are directly injected into the soil. In this case, the purification-promoting component is injected into the soil as an aqueous solution or a gas. However, even in this case, the purification becomes uneven due to the unevenness of the soil. In addition, at the time of injection, the injection pressure is maintained at a constant level. However, since the injection is performed continuously, the injection pressure cannot be made very high. However, it is not possible to secure a wide purification area per injection well. Therefore, in order to purify the contaminated ground in a wide range of desired areas, the number of injection wells must be increased, and there has been a problem that the cost of ground purification is increased.

[0006] The present invention has been made in view of the above-mentioned conventional problems, and is intended to improve the purification ability of the contaminated ground by allowing the purification-promoting component to reach farther and more widely. It is an object to provide a purification method and a purification device therefor.

[0007]

According to the present invention, there is provided a method for purifying a contaminated ground, comprising the steps of: And an intermittent supply in the form of a pulse, and an ultrahigh-pressure purification promoting component is blown into the contaminated ground and the waste landfill from the injection port of the injection well (claim 1).

[0008] Further, a purification apparatus for achieving this purification method comprises an injection well inserted into a contaminated ground or a waste landfill, and an ultrahigh-pressure compressed air attached to the upper end of the injection well for a short time. A high-pressure intermittent injection device that supplies pulses to the injection well intermittently at intervals of, and a purification-promoting component supply facility that is connected to the supply path of the compressed air and adds a purification-promoting component to the compressed air, Purification promoting components are blown into the contaminated ground and waste landfill along with compressed air from the injection well outlet.

In this purification method and its purification apparatus, the purification promoting component is pulsed into the injection well at an extremely high pressure (for example, 2 to 10 atm) at short intervals, and intermittently (for example, 1/30 to 1/1). (5HZ cycle), the purification-promoting component is explosively blown from the injection port of the injection well into the contaminated ground or the waste landfill at an extremely high pressure at a predetermined intermittent timing. As a result, the purification-promoting components injected from the injection well into the contaminated ground or waste landfill will diffuse and reach a farther and wider area, and the contaminants in the contaminated ground or waste landfill will be contaminated. And the purification area per injection well can be greatly expanded. In addition, since the explosive injection of the purification-promoting component is intermittently repeated in the form of a pulse, the path of the purification-promoting component is likely to be random at each injection, and the path of the purification-promoting component is likely to be random. The whole can be purified as uniformly as possible. Further, by intermittently injecting a purification promoting component suitable for mixed contaminants and the like, the concentration of the injected component can be easily controlled and waste can be eliminated.

Further, in the above-mentioned purification method, gaseous substances in the ground are recovered from a suction well inserted into a contaminated ground or a waste landfill, and the recovered gaseous substances are made harmless by a purification treatment and discharged. It is desirable (claim 2).

[0011] Further, a purifying apparatus for achieving this purifying method includes an injection well inserted into a contaminated ground or a waste landfill, and an ultrahigh-pressure compressed air attached to the upper end of the injection well for a short time. A high-pressure intermittent injection device that supplies pulses to the injection well intermittently at intervals of: a purification-promoting-component supply facility that is connected to the compressed-air supply path and adds a purification-promoting component to the compressed air; A suction well inserted at a predetermined interval into a contaminated ground or a waste landfill, and an exhaust gas purification facility for purifying and detoxifying gaseous substances in the ground collected by the suction well. (Claim 6).

According to the purification method and the purification apparatus, since the purification promoting component is injected from the injection well into the contaminated ground and the waste landfill, while the gaseous substance is sucked from the absorption well, the purification promotion component is more easily diffused. In addition, harmful gaseous substances such as decomposed gas and surplus gas can be released from the ground naturally after being collected and purified by a suction well before being released into the atmosphere, thus preventing air pollution. can do.

Here, as the above-mentioned purification-promoting component, a component which promotes purification of contaminants such as oxygen-containing substances such as air, hydrogen peroxide and ozone, decomposing microorganisms, and nutrient sources for activating the decomposing microorganisms is used. Thus, purification can be appropriately performed in accordance with various pollutants (claim 3).

[0014] Further, as a purification device, an injection well inserted into a contaminated ground or a waste landfill and an ultrahigh-pressure compressed air attached to the upper end of the injection well are pulsed at short intervals. A high-pressure intermittent injection device that intermittently supplies the injection well, a purification-promoting component supply device that is connected to the compressed-air supply path, and that adds a purification-promoting component to the compressed air; A sheet member provided to cover the ground surface to prevent the substance from diffusing; a suction pipe provided between the sheet member and the ground surface to suction and collect the ejected gaseous substance; An exhaust gas purifying facility for purifying and detoxifying gaseous substances collected by a pipe may be provided (claim 7).

[0015] In this purification device, by providing a sheet member covering the surface of the contaminated ground or the landfill of waste, the gaseous substance spouting from the ground to the surface is prevented from diffusing into the atmosphere. In addition to the above, since the gaseous substances ejected to the ground surface are suctioned and collected by the suction pipe provided between the sheet member and the ground surface, the ground can be purified while preventing air pollution as described above. Compared with the case where a well is inserted into the ground, construction is easier and cost can be reduced.

Furthermore, in the above-mentioned purification method, it is desirable that the injection port of the injection well be made movable up and down in a contaminated ground or a waste landfill, and the injection position of the purification promoting component is adjusted vertically. Claim 4).

Further, in the purification apparatus for achieving this purification method, the injection well surrounds the outer periphery of a portion disposed in the contaminated ground or the waste landfill with a guide pipe communicating inward and outward. The injection port of the injection well is disposed in the guide pipe so as to be able to move up and down, and the vertical position of the injection port is configured to be adjustable.

In this purification method and purification device, the injection position of the purification promoting component can be changed up and down in one injection well, so that even when the depth of the contaminated area of the contaminated ground or the waste landfill is large, the purification is performed. The cleansing of the ground can be equalized in the vertical direction by blowing the accelerating component evenly in the vertical direction.

[0019]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a first embodiment of a method for purifying contaminated ground according to the present invention, and FIG. 1 is a sectional view schematically showing a main part of a purification apparatus.

The basis of the method for purifying a contaminated ground (including a waste landfill) according to the present invention is based on the fact that an injection well 14 inserted into a contaminated ground 12 is supplied with an ultrahigh pressure to purify a purification promoting component at short intervals. It is supplied intermittently in the form of a pulse, and an ultra-high pressure purification promoting component is supplied from the injection port 14a of the injection well 14 at a predetermined intermittent timing.
To blow into it explosively.

That is, the method for purifying contaminated ground of the present invention is shown in FIG.
Can be achieved by the purifying apparatus 10 shown in FIG. This purification apparatus 10 shows one embodiment for achieving the purification method of the present invention, and an injection well 14 inserted into a contaminated ground 12, and an ultrahigh-pressure compressed air attached to the upper end of the injection well 14 A high-pressure intermittent injecting device 16 which supplies pulses to the injection well 14 intermittently at short intervals, and a purification-promoting component supply device connected to the compressed air supply path 18 for adding the purification-promoting component to the compressed air 20.

The above-mentioned contaminated ground 12 is a case of a waste landfill site, in which decomposable organic trash is buried and decomposed over a long period of time. Gases and odors are emitted. In addition, the decomposition also generates leachate containing a large amount of pollutants. Then, the injection well 14 is inserted into the contaminated ground 12 by boring vertically. The injection well 14 is formed of a pipe of a predetermined length, and a jet port 1 provided at a lower end thereof.
4a is located at a predetermined depth of the contaminated ground 12, and the upper end of the injection well 14 is protruding above the ground.

The high-pressure intermittent injection device 16 is connected to the injection well 1
4 and is connected to the high-pressure intermittent injection device 16 with an ultra-high pressure (for example, 2 to 1) generated by the air compressor 22.
(0 atm) of compressed air is introduced via the supply pipe 18a. The high-pressure intermittent injection device 16 includes a tank (not shown) for storing compressed air, and an intermittent valve for intermittently discharging the compressed air in the tank. Are instantaneously opened to discharge high-pressure air, and when the pressure in the tank is reduced by this discharge, the intermittent valve is immediately closed.

Therefore, while the compressed air is supplied from the air compressor 22, the high-pressure intermittent injection device 16 intermittently makes the high-pressure air in the tank pulsed at short intervals (for example, 1/30 to 1/30). The compressed air is supplied to the injection well 14. Then, the ultra-high pressure compressed air is instantaneously injected into the contaminated ground 12 from the jet port 14 a at the lower end of the injection well 14 at a predetermined intermittent timing. At the time of this injection, the cavitation effect is exerted, and the compressed air is explosively blown out from the jet port 14a, and the blowout energy at this time becomes extremely large.

The purification promoting component supply equipment 20 includes
A storage tank 24 for storing the purification promoting component is provided, and this storage tank 24 is connected to a pipe 24 through a flow control valve 26.
At a, it is connected to the supply path 18 on the discharge side of the high-pressure intermittent injection device 16. Here, the supply path 18 is a path for supplying compressed air from the air compressor 22 into the contaminated ground 12, and the supply pipe 18a connecting the air compressor 22 and the high-pressure intermittent injection device 16, and the high-pressure intermittent injection device. 1
6 itself further includes an injection well 14. And
By opening the flow control valve 26, the purification promoting component in the storage tank 24 is added to the compressed air, and the amount of addition is controlled by adjusting the opening of the flow control valve 26.

The purification accelerating components stored in the storage tank 24 include air, hydrogen peroxide (H ₂ O ₂ ) and ozone (O ₃ ).
And other components that promote the purification of contaminants such as oxygen-containing substances such as oxygen-decomposed microorganisms M, nutrients that activate the decomposed microorganisms M, and the like. Pollutants are particularly representative of organochlorines, oils, solvents, volatiles, pesticides, other degradable organics, and cyanide.

Air promotes the activation of aerobic microorganisms M by oxygen contained therein, and H ₂ O ₂ has an effect of separating oil from soil particles of oil-contaminated soil by bubbles when generating oxygen, After decomposing into water and oxygen, no extra substances remain,
And it can be easily injected as a mist. O ₃ has better oxidation efficiency. As the nutrient source, nutrients suitable for growing the degrading microorganism M and components suitable for activating the degrading microorganism M are used. Examples of the nutrient include phosphorus, nitrogen, potash, silicon, and the like of living organisms. There are some major elements required to maintain the above and trace elements such as manganese which are mainly taken as salts other than carbon, hydrogen and oxygen.

As the decomposing microorganism M, a methane-utilizing bacterium that aerobically decomposes (oxidizes) TCE (trichloroethylene) is known. In this methane-utilizing bacterium, methane is used as a nutrient source. Other decomposing microorganisms M used for TCE decomposition include toluene-utilizing bacteria, phenol-utilizing bacteria, nitrifying bacteria, propane-oxidizing bacteria, and isopropylene-oxidizing bacteria. Used. It goes without saying that a nutrient source suitable for the decomposing microorganism M that purifies the contaminant is used for other contaminants in the contaminated ground 12 without being limited to the TCE.

Therefore, in the method of purifying contaminated ground according to the present embodiment, the compressed air is supplied to the high-pressure intermittent injection device 16 by driving the air compressor 22 of the purification device 10 so that the ultra-high-pressure compressed air is supplied to the injection well. 14 is injected into the contaminated ground 12 from the spout 14a. At this time, by opening the flow control valve 26 of the purification promoting component supply facility 20, the purification promoting component in the storage tank 26 is injected into the contaminated ground 12 together with the compressed air. Here, compressed air containing oxygen is one of the purification promoting components.
Expressed as a purification promoting component including the compressed air.

The purification-promoting component injected into the contaminated ground 12 is pulsed at a short interval at an ultra-high pressure by the high-pressure intermittent injection device 16 and supplied at a predetermined intermittent timing. Explosively blown into the contaminated ground 12 from 14a, it will reach farther and more widely. Further, since the explosive injection of the purification promoting component is intermittently repeated, the path of the purification promoting component tends to become random at every injection, which changes the accumulation state of the contaminated ground 12, and the entire contaminated ground 12 is almost completely removed. Purified uniformly. Further, the flow rate of the purification promoting component can be controlled by adjusting the opening degree of the flow control valve 26. However, by performing the injection of the purification promoting component suitable for the mixed pollutants by intermittent injection, the intermittent injection component can be controlled. The concentration can be easily managed and waste can be eliminated.

As described above, the purification-promoting component injected into the contaminated ground 12 is diffused over a wider area, so that the purification area per injection well 14 per unit can be expanded, and the contaminated ground in a certain area can be reduced. To perform purification, the number of injection wells 14 in the entire purification apparatus 10 can be reduced. In other words, the purification promoting component activates the decomposing microorganisms M contained in the contaminated ground 12 in a wide range by oxygen and nutrients contained in the air,
Promotes decomposition of pollutants. In addition, in the case of oil, solvent, and volatile substances, the purification period of which is prolonged in the decomposing microorganisms M, when pollutants are used, by selecting a purification promoting component suitable for each purification, these contaminants can be reduced in a short time. It can be properly purified in a while. Furthermore, when the amount of indigenous decomposed microorganisms M is small, it is desirable to include replenished decomposed microorganisms M as a purification promoting component.

When the purification promoting component is injected into the contaminated ground 12 through the high-pressure intermittent injection device 16, generated gas, landfills and leachate are discharged from the contaminated ground 12 of the waste landfill site at regular intervals. Sampling and analysis are performed, the degree of purification is monitored, and when it is determined that the result is stabilized, the operation of the purification device 10 is stopped to complete the purification process.

In the present embodiment, the case where the contaminated ground 12 is a waste landfill site is disclosed. However, as shown in FIG. 2, the contaminated ground is located on the natural ground 12a where the contaminants have diffused into the soil. Can be similarly purified using the purification device 10 described above. In this case, of course, the injection port 14a of the injection well 14 is located in the contaminant diffusion layer S.
In this case, monitoring of the degree of pollution involves sampling and analyzing groundwater, generated gas, and soil.

FIG. 3 shows a second embodiment of the present invention, in which the same components as those in the above-described embodiment are denoted by the same reference numerals, and a duplicate description will be omitted. FIG. 3 is a cross-sectional view schematically showing a main part of the purification device.

In the method of purifying contaminated ground according to this embodiment,
A gaseous substance is collected from the suction well 30 inserted into the contaminated ground 12, and the collected gaseous substance is rendered harmless by a purification treatment and discharged. Examples of the gaseous substance include a decomposition gas generated by purifying a pollutant and an excess gas supplied from the injection well 14.

That is, the purifying apparatus 10a for achieving the purifying method of this embodiment is different from the purifying apparatus 10 of the above embodiment.
Suction well 30 for sucking gaseous substances in ground 12
Is provided. The suction well 30 is formed of a pipe in the same manner as the injection well 14, and a plurality of suction wells 30 are arranged at a predetermined distance from one injection well 14 so as to surround the injection well 14. The lower end of each suction well 30 is inserted into the contaminant diffusion layer S in the contaminated ground 12, and the lower end thereof has a slit or a porous opening for sucking gaseous substances over an appropriate length. A part is formed.

A suction pump 34 for gas suction is connected to the upper end of the suction well 30 protruding above the ground via a gas-liquid separator 32. By operating the suction pump 34, the decomposition gas generated at the time of soil purification from the opening of the suction well 30 and the purification promoting component from the injection well 14 in the form of gas (mist) are injected. Surplus gas,
In addition, moisture and the like in the soil are sucked. The gaseous substance mixed with water sucked in the suction well 30 is separated only by the gas-liquid separation device 32 and then only the gas is removed by the suction pump 34.
Is sucked. Then, the gas sucked by the suction pump 34 is sent to the exhaust gas purifying device 36, where the gas is purified and rendered harmless.
8 to the atmosphere.

Accordingly, in this embodiment, while the purification promoting component is injected into the contaminated ground 12 from the injection well 14 and is sucked from the absorption well 30, the purification promoting component supplied from the injection well 14 is further diffused by this suction. Easier to do. For this reason, coupled with the fact that the purification promoting component is explosively blown from the injection well 14 through the high-pressure intermittent injection device 16,
The purifiable area can be significantly expanded.

Further, since the decomposition gas and surplus gas in the contaminated ground 12 can be collected by the suction well 30 before being naturally released into the atmosphere, air pollution can be prevented. Therefore, in this embodiment, purification of the contaminated ground 12
Since the stabilization is performed within a short period of time, it is particularly useful for early use of the site and environmental conservation, and the surrounding environment can be considered. It goes without saying that this embodiment is also effective in any of the waste landfill and the natural ground where the pollutants are diffused.

FIG. 4 shows a third embodiment of the present invention, in which the same components as those in the above embodiment are denoted by the same reference numerals, and a duplicate description will be omitted. FIG. 3 is a cross-sectional view showing a main part of the purification device.

That is, according to the purification method of this embodiment, the injection port 14 a of the injection well 14 can be moved up and down in the contaminated ground 12.
The pouring position of the purification promoting component is adjusted in the vertical direction. The pouring well 14 surrounds the outer periphery of a portion arranged in the contaminated ground 12 with a guide tube 40 communicating inward and outward, The injection port 14a of the injection well 14 is arranged in the guide tube 40 so as to be able to move up and down, and the vertical position of the injection port 14a is adjustable.

The structure communicating with the inside and outside of the guide tube 40 is formed by forming a plurality of slits formed in the vertical direction over the entire length of the guide tube 40 in the circumferential direction. In this case, the pipes divided by the slits are connected to each other at appropriate positions. It is also achieved by forming the guide tube 40 with a perforated plate.

The injection well 14 is formed to be longer than the guide tube 40, and the upper end of the injection well 30 is projected above the ground with the ejection port 14a positioned at the deepest portion of the guide tube 40. High-pressure intermittent injection device 1
6 is attached. A packer 42 is attached to the outer periphery of the injection well 14 above the jet port 14a, and the packer 42 is slidably tightly contacted with the inner circumference of the guide tube 40, so that the injection from the jet port 14a is performed. The purification promotion component is prevented from escaping upward, and is concentrated and blown into the contaminated ground 12. More preferably, although not shown, the injection well 1 is located below the jet port 14a.
By providing a packer that ascends and descends integrally with 4 and slidably seals the inside of the guide tube 40, the concentration of the injected purification promoting component can be further improved.

Therefore, in this embodiment, the injection port 14a can be moved up and down by moving up and down the injection well 14, so that the injection position of the purification promoting component can be changed up and down in one injection well 14. Therefore, even when the depth of the contaminated area of the contaminated ground 12 is large, the purification promoting component is blown evenly in the vertical direction, so that the purification of the ground 12 can be equalized in the vertical direction. Therefore, since the purification area in one injection well 14 is further expanded, the number of injection wells 14 in the entire purification apparatus 10b can be further reduced. Further, in this embodiment, it is desirable to change the position of the suction well 30 depending on the position of the jet port 14a.

FIG. 5 shows a fourth embodiment of the present invention, in which the same components as those in the above-described embodiment are denoted by the same reference numerals, and a description thereof will be omitted. FIG. 3 is a cross-sectional view showing a main part of the purification device. As shown, in the fourth embodiment, the contaminated ground 1 is replaced with the suction well 30 in the above-described embodiment.
The suction pipe 42 is laid vertically and horizontally on the ground surface portion 2 above, and the ground surface portion is covered with a sheet member 44. The suction pipe 42 is interposed between the ground surface portion and the sheet member 44. Further, the peripheral portion 44a of the sheet member 44 is buried under the ground surface with a predetermined width.

Therefore, in the purification apparatus of the fourth embodiment having the above-described configuration, the sheet member 44 is provided so as to cover the ground surface above the contaminated ground 12, so that the gas ejected from inside the ground 12 to the ground surface is provided. It is possible to prevent the gaseous substance from being diffused into the atmosphere and to collect the gaseous substance ejected to the ground surface by suction with the suction pipe 42 provided between the sheet member 44 and the ground surface. The ground 12 can be purified while preventing air pollution, and the construction is easier and the cost can be significantly reduced as compared with the case where the suction well is inserted into the ground as in the above-described embodiment.

Although not shown in FIG. 5,
In this embodiment, as in the case of FIG.
4 surrounds an outer periphery of a portion arranged in the contaminated ground 12 with a guide pipe communicating inward and outward, and arranges an ejection port 14a of the injection well 14 in the guide pipe so as to be able to move up and down.
The injection port 14a may be configured so that the vertical position of the injection port 14a is adjustable, the injection port 14a of the injection well 14 is vertically movable in the contaminated ground 12, and the injection position of the purification promoting component is adjustable in the vertical direction. Of course.

[0048]

As described above, in the method and apparatus for purifying a contaminated ground or a waste landfill according to the first and fifth aspects of the present invention, the purification-promoting component flows from the injection well outlet into the contaminated ground. Since it is pulsed at a short time interval and injected at an extremely high pressure at a predetermined intermittent timing and blown in explosively, the purification-promoting component can be dispersed farther and reach a wider range. Therefore,
Since the purification area of the injection well per unit can be greatly expanded, the number of injection wells in the entire purification apparatus can be reduced and the configuration can be simplified. In addition, the explosive injection of the purification-promoting component is intermittently repeated, which can change the state of soil accumulation every time the injection is performed, thereby making it possible to substantially uniformly clean the entire ground and reduce contaminants that are mixed in. By performing the injection of a suitable purification promoting component by intermittent injection, the concentration of the injected component can be easily controlled and waste can be eliminated.

Further, in the method and apparatus for purifying a contaminated ground or a waste landfill site according to the second and sixth aspects of the present invention, a purification promoting component is injected from the injection well into the contaminated ground or the waste landfill site. In addition, since the gaseous substances in the ground are sucked from the absorption well, the purification-promoting components can be more easily diffused, and the decomposition gas and surplus gas can be naturally discharged from the ground to the atmosphere by the suction well. Since it can be collected and released after being purified, air pollution can be prevented.

Further, in the method for purifying a contaminated ground or a waste landfill ground according to claim 3 of the present invention, the purification promoting component activates air, oxygen-containing substances such as hydrogen peroxide and ozone, decomposing microorganisms, and decomposing microorganisms. Since it is a component that promotes the purification of contaminants such as nutrient sources that are becoming toxic, it is effective for a wide range of types of contaminants, and it is possible to perform purification appropriately for various contaminants.

Further, in the purification apparatus according to claim 7 of the present invention, by providing a sheet member covering the surface of the contaminated ground or the landfill of the waste landfill, gaseous substances spouting from the ground to the surface can be reduced to the atmosphere. While preventing gaseous substances ejected to the ground surface by suction with a suction pipe provided between the sheet member and the ground surface while preventing it from diffusing into the inside, it is possible to prevent air pollution as described above. The ground can be purified, and the construction is easier and the cost can be reduced as compared with the case where the suction well is inserted into the ground.

Furthermore, in the method and apparatus for purifying a contaminated ground or a waste landfill ground according to claims 4 and 8 of the present invention, the injection position of the purification promoting component can be changed up and down in one injection well. Therefore, even when the depth of the contaminated area or the contaminated area of the waste landfill is large, the purification promoting component can be evenly blown up and down, and the purification of the ground can be equalized in the depth direction.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing a main part of a first embodiment of the present invention.

FIG. 2 is a sectional view schematically showing a main part of another embodiment of the first embodiment of the present invention.

FIG. 3 is a sectional view schematically showing a main part of a second embodiment of the present invention.

FIG. 4 is a sectional view schematically showing a main part of a third embodiment of the present invention.

FIG. 5 is a sectional view schematically showing a main part of a fourth embodiment of the present invention.

[Explanation of symbols]

 10, 10a, 10b Purification device 12, 12a Contaminated ground 14 Injection well 14a Spout port 16 High-pressure intermittent injection device 18 Supply path 20 Purification promoting component supply equipment 30 Suction well 36 Exhaust gas purification device 40 Guide pipe 42 Suction pipe 44 Sheet member

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Katsuhiko Kikuta, Inventor 2- 15-2 Konan, Minato-ku, Tokyo Obayashi Gumi Tokyo Head Office (72) Inventor Shuichi Sakamoto 2- 15-2 Konan, Minato-ku, Tokyo Stock Obayashi Corporation Tokyo headquarters (72) Inventor Yoji Ishikawa 4-640 Shimoseito, Kiyose-shi, Tokyo Co., Ltd. Inside Obayashi Corporation Technical Research Institute (72) Inventor Hirokazu Tsuji 4-640 Shimoseito, Kiyose-shi, Tokyo Co., Ltd. (72) Inventor Masayoshi Yagi 1-10-4 Minamidai, Kawagoe-shi, Saitama Prefecture Inside Obayashigumi Tokyo Machinery Factory (72) Inventor Ryota Akai 1-10-4 Minamidai, Kawagoe-shi, Saitama Prefecture Tokyo Machinery Obayashi Corporation F-term in the factory (reference) 4D004 AA41 AC07 CA18 CA34 CA36 CA50 CC02 CC11 CC20

Claims (8)

[Claims] 1. An ultrahigh-pressure pulse of a purification-promoting component is intermittently supplied at short intervals to an injection well inserted into a contaminated ground or a waste landfill. A method of purifying a contaminated ground, comprising blowing a purification promoting component into the contaminated ground or a waste landfill. 2. An ultra-high pressure, intermittently supplying a purification-promoting component in a pulsed manner at short intervals to an injection well inserted into a contaminated ground or a landfill for waste disposal. The purification promoting component is blown into the contaminated ground, and gaseous substances in the ground are collected from a suction well inserted into the contaminated ground or the waste landfill, and the collected gaseous substances are rendered harmless by purification treatment and discharged. A method for purifying contaminated ground or waste landfill. 3. The purification-promoting component is a component that promotes the purification of contaminants such as oxygen-containing substances such as air, hydrogen peroxide and ozone, decomposing microorganisms, and nutrient sources for activating decomposing microorganisms. 3. The method for purifying a contaminated ground or a waste landfill site according to claim 1 or 2. 4. The injection port of the injection well is capable of moving up and down in a contaminated ground or a waste landfill, and an injection position of the purification promoting component is adjusted in a vertical direction. Of landfills and waste landfills. 5. An injection well inserted into a contaminated ground or a waste landfill, and intermittently intermittently pulsed with ultrahigh-pressure compressed air attached to the upper end of the injection well at short intervals. A high-pressure intermittent injection device for supplying to the well, a purification-promoting component supply device connected to the compressed-air supply path for adding a purification-promoting component to the compressed air, and a purification-promoting component together with the compressed air from the injection port of the injection well. A cleaning device for polluting ground and waste landfill, characterized by injecting air into contaminated ground and waste landfill. 6. An injection well inserted into a contaminated ground or a waste landfill, and intermittently intermittently pulsed with ultrahigh-pressure compressed air attached to the upper end of the injection well at short intervals. A high-pressure intermittent injection device for supplying to the well, a purification-promoting-component supply device connected to the compressed-air supply path for adding the purification-promoting component to the compressed air, and a landfill for contaminated soil and waste at a predetermined interval from the injection well. A contaminated ground or waste landfill site, comprising: a suction well inserted into the ground; and an exhaust gas purification facility for purifying and detoxifying gaseous substances in the ground collected by the suction well. Purification equipment. 7. An injection well inserted into a contaminated ground or a waste landfill, and intermittently intermittently pulsed with ultra-high pressure compressed air attached to the upper end of the injection well at short intervals. A high-pressure intermittent injection device for supplying to the well, a purification-promoting component supply device connected to the compressed-air supply path for adding the purification-promoting component to the compressed air, A sheet member provided so as to cover the ground surface portion in order to prevent the occurrence of a gaseous substance; a suction pipe provided between the sheet member and the ground surface portion for sucking and collecting gaseous substances ejected; and a gas collected by the suction pipe. A purification device for contaminated ground and waste landfill, comprising: an exhaust gas purification facility for purifying and detoxifying particulate matter. 8. The injection well surrounds a periphery of a portion disposed in a contaminated ground or a waste landfill with a guide pipe communicating inward and outward, and moves up and down an ejection port of the injection well in the guide pipe. The apparatus for purifying a contaminated soil or a waste landfill according to any one of claims 5 to 7, wherein the apparatus is arranged so as to be capable of adjusting the vertical position of the spout.