JP4580077B2 - Contaminant decomposition promotion equipment and promotion method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to the decomposition of pollutants in a pollutant disposal site or treatment plant and the purification of contaminated groundwater containing the same.
[0002]
[Prior art]
Conventionally, only the installation of water-impervious sheets, etc. has been obligatory at pollutant disposal sites or treatment plants, and no measures have been taken regarding the decomposition and treatment of pollutants themselves. If a site or a treatment plant is full, a new site is repeatedly opened, and therefore a former disposal site or a treatment plant that cannot be used in the future occupies a vast area. As a countermeasure against this, a method of embedding a permeation wall in the soil (Japanese Patent Laid-Open No. 5-317850) has been proposed, but an effect on a pollutant dissolved in water cannot be expected, and a measure for maintaining the initial effect is not found. Moreover, even if certainty is expected, pumping up and treating groundwater (JP-A-9-253688) is not practical because it costs more than water supply.
[0003]
[Problems to be solved by the invention]
The purpose is to propose a method that can safely and reliably maintain the effects of pollutants in pollutant disposal or treatment plants.
[0004]
[Means for Solving the Problems]
Install the required number of contaminated soil decomposition promotion devices downstream of the groundwater of the pollutant disposal site or treatment plant partitioned by the water barrier, and approach the relatively large volume of contaminated soil decomposition promotion devices in the downstream of the groundwater. It is a wastewater treatment device at a pollutant disposal site or treatment plant that has been installed. A wastewater treatment device for a pollutant disposal site or a treatment plant provided with a relatively large capacity contaminated soil decomposition promoting device in the section, wherein the contaminated soil decomposition promoting device downstream of the groundwater It is configured to be inserted in a vertical hole so that the upper edge of the equipment slightly protrudes from the ground surface, and is provided in the soil, and a chemical decomposition catalyst or a microorganism is added to, contained in, or contained in the contaminant decomposition promotion equipment. In the soil after holding Excess water is removed and the decomposition of pollutants is promoted. The pollutant decomposition promoting equipment is a water permeable carrier for holding a chemical decomposition catalyst or microorganisms and a wall material for supporting them. , Hydrophilic, water-permeable and formed into a thin-walled cylinder with a large opening at least at the top, while the relatively large-capacity contaminated soil decomposition promoting device at the most downstream of the groundwater It is configured to be inserted in a vertical hole so that the upper edge of the material decomposition promotion equipment slightly protrudes from the ground surface, and is provided in the soil, and a chemical decomposition catalyst or microorganism is added to the contaminant decomposition promotion equipment , After containing or holding, excess water in the soil is eliminated and the decomposition of the pollutant is promoted, and the pollutant decomposition promoting equipment is a water-permeable carrier for holding a chemical decomposition catalyst or microorganisms And wall material to support them It has water retention, hydrophilicity, and water permeability, and has a large opening at the top for charging neutralizing agents, bactericides, activators and other treatment chemicals. A wastewater treatment apparatus for a pollutant disposal site or treatment plant characterized by having a siphon drainage device for discharging treated water into groundwater outside the pollutant disposal site or treatment plant , which has been developed one after another. and the catalyst and chemicals and microorganisms for pollutant decomposition are proposes a equipment for use in the actual contaminants landfills or treatment plants.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Although embodiments of the present invention will be described, the embodiments of the present invention are extremely diverse, and the disclosure herein is only some representative examples, and as a matter of course, it will be described later. It is not limited to the embodiment shown.
[0006]
The pollutant decomposition promoting device, which is a basic device of the present invention, is embedded in the soil, and therefore needs to be strong enough not to be deformed by water pressure or earth pressure, and constitutes the thin-walled cylindrical device body. It is good when the water-retaining material itself has the necessary strength, but otherwise it is formed by a perforated plate made of a corrosion-resistant material with moderate strength or a combination of a cylindrical frame and a netting material. A structure in which a water-retaining material is arranged inside or outside of the cylindrical body, or a cylindrical body having a similar structure is used as a double wall, and a water-retaining material or a mixture of a water-retaining material and a carrier is filled therebetween. The filling may be powdery, granular or massive.
[0007]
The water-permeable carrier for holding the chemical decomposition catalyst or the microorganisms may be formed in a plate shape along the water retention material, or may be mixed with the water retention material. Alternatively, it may be formed into a plug shape and inserted into a hole provided in a water retaining material or other wall material. Further, it is better if the chemical decomposition catalyst itself can be used as a microorganism carrier.
[0008]
In short, it must be a thin-walled cylindrical pollutant degradation promoting device formed of a wall material consisting of a chemical decomposition catalyst supported by a water-retaining material or a water-permeable carrier for holding microorganisms. It ’s fine. Here, the cylindrical shape is not limited to a cylinder or a tube, and any cross-sectional shape may be used, and any shape such as a rectangle, a triangle, or a rhombus may be used. There may be. Furthermore, the side shape may be a conical shape or an elongated trapezoidal shape that tapers downward, or a combination thereof. When there is no bottom, it is desirable that the lower end of the thin cylindrical body extends to the vicinity of the water blocking wall. This is because it is necessary that only the moisture is held at the inner lower portion of the cylindrical body.
[0009]
The thin wall here means that the wall thickness of the cylinder wall is relatively thin compared to the opening area of the upper large opening, and conversely the large opening is relative to the opening area compared to the wall thickness of the cylinder wall. Means big.
[0010]
It is advisable to provide an appropriate mesh wire mesh or lattice in the upper large opening in order to prevent foreign matter from dropping or being buried. Also, if a lid is provided on the upper large opening, rainwater does not enter the equipment body directly, so that the decomposition effect in the body can be maintained, and the lid can be made transparent or translucent, or further collected. If it is set as the structure which has a light effect, the temperature in this apparatus main body will rise and the decomposition effect will improve. Hereinafter, typical embodiments will be described with reference to the drawings.
[0011]
FIG. 1 shows one embodiment of a contaminated soil decomposition promoting device. A pollutant decomposition promoting device composed of the water retaining wall material 1 is inserted into a vertical hole provided on the ground surface 61. Although the standing hole may be bare digging, it is desirable to provide a frame or the like so that the water retaining wall material 1 can be easily put in and out.
[0012]
Although the carrier 2 is enclosed in the water retaining wall material 1 in the figure, it has a function of holding the chemical decomposition catalyst or the microorganism as described above, and the water absorption is such that moisture is always supplied and held in that place. Any structure having water retention, hydrophilicity and the like may be used. If the contaminated soil decomposition promoting device is installed in a contaminated area, the water that penetrates the water retaining wall material 1 and enters the device main body keeps the entire water retaining wall material 1 moist. The water evaporates from both the water retaining wall material 1 and the contaminants are concentrated inside the device main body, and the decomposition of the contaminants in the carrier 2 is promoted. At the same time, since there is an effect of removing moisture in the contaminated area, the risk of contaminated water overflowing from the water blocking wall 7 is reduced. Microorganisms in the natural world are aerobic and anaerobic, but the effect is limited to A near the ground surface 61 in FIG. 2 and the anaerobic one limited to B near the groundwater level 62. After all, the decomposition of the pollutant hardly progresses, but in the present invention, the range of C by the carrier 2 functions as an aerobic activity range, so the decomposition of the pollutant is promoted. A catalyst can also be used effectively.
[0013]
FIG. 3 shows an arrangement example in a pollutant disposal site or treatment plant. A necessary number of contaminated soil decomposition promoting devices (water retaining wall materials 1) are arranged at appropriate intervals in the disposal site or the treatment site. A contaminated soil decomposition promoting device (water retaining wall material 11) equipped with the drainage device 3 is disposed on the downstream side of the groundwater in the disposal site or the treatment site. 3 and 4, a siphon drainage device 3 including a siphon pipe 31, a water injection / air venting device 32, and a flow rate adjustment device 33 is employed as the drainage device. According to this drainage device, no special power is required, and if the siphon effect is established after confirming the water quality in the vessel, the drainage device is automatically drained. When the internal water quality does not reach the desired value, a neutralizer, disinfectant, activator, or other necessary chemicals are added as necessary water treatment agents, and the water quality reaches a predetermined value. After confirming that the drainage operation has been performed, the drainage operation is performed. Since it is discharged into groundwater outside the site after sufficient water treatment, it is possible to prevent pollution water from overflowing from the disposal site or treatment site and causing pollution due to the effect of positive evaporation.
[0014]
FIG. 5 shows various shapes other than the cylindrical water retaining wall material (1, 11). 12 is a conical shape, 13 is a trapezoidal shape, and 15 is a composite shape, both of which have a large area at the top large opening and are easy to enter sunlight, so it is effective when using microorganisms that require photocatalysts or light rays. It is. Further, 14 is a combined cylindrical and conical shape, and is effective when the length of the water retaining wall material needs to be increased as in the case of 15.
[0015]
FIG. 6 is an embodiment in which a lid is provided on the large opening of the water retaining wall material, both of which are formed of a transparent or translucent material, which raises the internal temperature and promotes evaporation and decomposition. is there. 41 is a convex lens, 42 is a fish-eye lens, and is more effective due to its light condensing effect. 43 further introduces a light beam to the lower part where the light beam is difficult to reach by combining it with a glass fiber 44. It is more effective for those that need light. FIG. 7 effectively utilizes the internal temperature rise to promote natural circulation of air and promote evaporation. Inside the water retaining wall material 1, an inner cylinder 16 having a large number of ventilation holes is inserted. In the upper part, a transparent lid 41 is provided. According to this apparatus, the air temperature decreases due to the evaporation of moisture in the gap between the water retaining wall material 1 and the inner cylinder 16, so that a downward flow of air is generated. Since an upward flow is generated, the natural circulation of air is strengthened and the evaporation of moisture is promoted.
[0016]
FIG. 8 shows an apparatus when harmful gas is generated. In this example, the transparent lid 41 is provided close to the ground surface 61, and the upper part thereof is a double wall 45, which has a heat retaining effect. A gas pipe 51 for sucking the generated gas from the inside of the lid 41 is provided and introduced into the gas processing apparatus 5. In the figure, the gas treatment device 5 is provided with a radioactive substance 53 inside the decomposition device 52 to decompose the pollutant gas, and further, the air treated by the blower 55 is released into the atmosphere via the adsorption device 54. The gas decomposition apparatus 5 is not limited to this illustration, and it is necessary to employ an appropriate apparatus according to the type of gas generated.
[0017]
According to the present invention, microorganisms for decomposing pollutants and chemical decomposition catalysts that have been developed one after another can be effectively used to prevent the overflow of contaminated water in the contaminated area, and the treatment of contaminated water and pollutants The decomposition of the pollutant disposal site or the treatment plant can be prevented by decomposing.
[Brief description of the drawings]
[Fig. 1] Longitudinal cross-sectional view of an embodiment of equipment for promoting the degradation of pollutants [Fig. 2] Comparison of the range of activity of microorganisms [Fig. 3] Example of arrangement of equipment for promoting the degradation of pollutants [Fig. 4] Pollutants with drainage devices Fig. 5: Example of water retaining wall material [Fig. 6] Example of transparent lid [Fig. 7] Example of air circulation type pollutant decomposition promoting device [Fig. 8] Example of generated gas treatment equipment 【Explanation of symbols】
DESCRIPTION OF SYMBOLS 1 Water retaining wall material 2 Carrier 3 Siphon drainage device 4 Lid 5 Gas treatment device 7 Water stop wall 11 Water retaining wall material 12 Water retaining wall material 13 Water retaining wall material 14 Water retaining wall material 15 Water retaining wall material 16 Inner cylinder 31 Siphon pipe 32 Water injection / air Extraction device 33 Flow rate adjustment device 41 to 43 Lid 44 Glass fiber 45 Double wall 51 Gas pipe 52 Decomposition device 53 Radiation material 54 Adsorption device 55 Blower 61 Ground surface 62 Ground water level 63 Internal water level 64 Outside ground water level 65 Groundwater flow

Claims (4)

Install the required number of contaminated soil decomposition promotion devices downstream of the groundwater of the pollutant disposal site or treatment plant partitioned by the water barrier, and approach the relatively large volume of contaminated soil decomposition promotion devices in the downstream of the groundwater. A wastewater treatment device for a pollutant disposal site or a treatment plant,
  The apparatus for promoting the degradation of contaminated soil on the downstream side of the groundwater is configured to be provided in the soil by inserting it into a vertical hole so that the upper edge of the equipment for promoting the degradation of pollutants slightly protrudes from the ground surface. After adding, containing or retaining a chemical decomposition catalyst or microorganism to the material decomposition promoting equipment, excess moisture in the soil is eliminated and the decomposition of the pollutant is promoted. A water-permeable carrier for holding a chemical decomposition catalyst or microorganisms and a wall material for supporting them, which are formed into a thin-walled cylinder having water retention, hydrophilicity, and water permeability and having a large opening at least at the top. While
  The relatively large-capacity polluted soil degradation promoting device at the most downstream part of the groundwater is installed in the soil by inserting it into a vertical hole so that the upper edge of the pollutant degradation promoting equipment slightly protrudes from the ground surface. After the chemical decomposition catalyst or microorganism is added to, contained in or retained in the pollutant decomposition promotion equipment, the excess moisture in the soil is eliminated, and the decomposition of the pollutant is promoted. Material decomposition promotion equipment is a water-permeable carrier for holding a chemical decomposition catalyst or microorganisms and a wall material for supporting them, and has water retention, hydrophilicity, water permeability, neutralizing agent, disinfectant at least at the top A siphon for discharging treated water into a pollutant disposal site or groundwater outside the treatment plant when the necessary water quality is confirmed there, in order to throw in an active agent or other treatment chemical Characterized by having a drainage device Dyed material landfills or treatment plants of waste water treatment equipment. The apparatus for promoting degradation of contaminated soil on the downstream side of groundwater is provided with a lid formed of a transparent or translucent material on the large opening to increase the internal temperature and promote evaporation and decomposition. Item 1. A wastewater treatment apparatus for a pollutant disposal site or treatment plant according to item 1. In the apparatus for promoting the degradation of contaminated soil on the downstream side of the groundwater, an inner cylinder having a number of ventilation holes in the lower part and a communication port with outside air is inserted in the upper part, and a transparent lid is provided in the upper part. The wastewater treatment apparatus for a pollutant disposal site or a treatment plant according to claim 1, further comprising another communication port with outside air between the upper portion of the inner cylinder. The apparatus for promoting the degradation of contaminated soil on the downstream side of the groundwater is provided with a transparent lid close to the ground surface, and the upper part of the device is a double wall having a heat retaining effect. Configured to be introduced into the processing equipment,
  The contaminated soil decomposition according to claim 1, wherein the gas treatment device decomposes contaminated gas by providing a radioactive substance therein, and further releases air treated by a blower through an adsorption device to the atmosphere. Promotion device.

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