KR101202676B1 - A purifying apparatus and method of contaminated ground water - Google Patents

Abstract

The present invention provides a treatment tank including an diffuser in a predetermined region of an inner space; An air blower for supplying air to the diffuser; And a pump for pumping groundwater into the treatment tank, wherein the diffuser includes a plurality of fine pores, and the method of purifying contaminated groundwater and pumping the contaminated groundwater simultaneously. Afterwards, the purified wastewater is introduced back into the basement, thereby continuing to purify.

Description

{A purifying apparatus and method of contaminated ground water}

The present invention relates to a system for purification of contaminated groundwater, and more particularly, groundwater contaminated with volatile organic compounds is pumped into a treatment tank and air is supplied to the treatment tank to evaporate volatile organic compounds dissolved in groundwater. The present invention relates to a contaminated groundwater purification device and a purification method using a pumping aeration method to remove volatile organic compounds, which are groundwater contamination sources.

Groundwater refers to all the water in the ground that fills or runs through the gaps between underground strata or rocks, and the surface water is formed by seeping through the gaps in the ground. At this time, the components of various indicators may also penetrate together, and contaminants may be introduced together.

In particular, recently, due to industrial pollution, unauthorized discharge of pollutants, destruction of groundwater wells, and the like, domestic wastewater and industrial water are seeping into the groundwater, and the pollution cases are increasing.

The problem is that this groundwater contamination not only stops in the area, but also flows along the water veins into the aquifers that act as clean surrounding groundwater and underground reservoirs, resulting in extensive water pollution. Once contaminated aquifers are almost impossible to restore to a non-contaminated state, they also have a vicious cycle of spilling over to the surface and polluting the surface water.

Particularly, it is a kind of volatile organic compound, which has high volatility, incombustibility, and high solubility in oil. It is used in various fields such as cleaning solvents for the manufacture of electronic components such as metal-related industries and semiconductor industries, solvents for paints and adhesives, and dry cleaning. Groundwater contamination by TCE (Trichloroethylene), a kind of highly volatile and low flammable organic solvent component, is increasing year by year, and the problem is serious as its use is impossible because it exceeds the proper water quality standard of groundwater. .

Groundwater contamination by TCE (Trichloroethylene) is caused by improper handling during treatment, illegal landfill disposal of sludge including this, illegal dumping of liquid waste solvents, and because of low viscosity and high specific gravity than water permeability It is easy to penetrate into the high strata and cause contamination by reaching the groundwater level, and when the TCE is dissolved in the groundwater above the drinking water quality standard of 0.03mg / L, it is fatal to humans such as cancer or Stevens Jones syndrome when drinking continuously. May cause disease.

If the groundwater, which is a clean water resource, is contaminated with TCE, the amount of groundwater resources is continuously reduced due to the diffusion and movement of these pollutants, which leads to the advent of a water shortage, which requires urgent restoration and recycling of contaminated groundwater through water quality improvement. Was done.

In addition, waste air treatment is another contaminant of groundwater in the process of excessive abuse due to lack of water in the surface water or low cost. Contaminants are introduced into the closed groundwater, which is likely to contaminate the entire groundwater, so it is desirable to purify the groundwater.

In addition, since the contaminated groundwater was pumped and purified, and then discharged to rivers, the utilization of the groundwater is lowered, so an improvement is required.

The problem to be solved by the present invention is to solve the contamination of the above-mentioned groundwater, and to purify the contaminated groundwater at the same time as the amniotic fluid and then to purify the discharged effluent back into the basement so that the purification can be continued.

In addition, another object of the present invention is to remove the pollutant source of contaminated groundwater by a physical method to enable more efficient groundwater pollution purification.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to solve the above-mentioned problems, the present invention provides a treatment tank including a diffuser in a predetermined region of the internal space; An air blower for supplying air to the diffuser; And a pumping pump for introducing groundwater into the treatment tank, wherein the diffuser provides a contaminated groundwater purification apparatus comprising a plurality of fine pores.

In addition, the present invention is the diffuser is an air collecting unit for collecting the air supplied from the air blower, an air bubble discharge unit for converting the air collected from the air collection unit into a bubble form and discharged and the air collection unit It comprises a connecting pipe for delivering air to the air bubble discharge portion, and provides a contaminated groundwater purification apparatus comprising the plurality of fine pores on the top, side or bottom of the air bubble discharge portion.

The present invention further includes a blower pipe for supplying air supplied from the air blower to the diffuser, wherein the blower pipe includes a first blower pipe, a second blower pipe, and a third blower pipe. One side of the first blower pipe is connected to an air blower, and the first blower pipe extends to an upper height outside the treatment tank in a direction perpendicular to the ground, and the other side of the first blower pipe is one side of the second blower pipe. And the other side of the second blower pipe is connected to one side of the third blower pipe in a direction perpendicular to the ground, and the other side of the third blower pipe is through the air pipe insertion hole in the upper portion of the treatment tank. Inserted in, it provides a contaminated groundwater purification device, characterized in that connected to the air collector of the diffuser.

In addition, the present invention is the treatment tank includes a first treatment tank or a second treatment tank, depending on the degree of contamination of the groundwater, the first treatment tank or the second treatment tank is selected or applied alone or more It provides a contaminated groundwater purification device, characterized in that installed in the polluted area.

In addition, the treatment tank further comprises a contaminated groundwater inlet installed above the treatment tank and a groundwater outlet located below the contaminated groundwater inlet, wherein the groundwater outlet is located at two-thirds from the top of the treatment tank. It provides a contaminated groundwater purification device, characterized in that located at a height of three quarters.

In addition, the present invention, the treatment tank includes a first treatment tank and a second treatment tank, the first treatment tank includes a first groundwater outlet and a second groundwater outlet, the second treatment tank is a third And a groundwater discharge port and a fourth groundwater discharge port, wherein the first treatment tank uses either the first groundwater discharge port or the second groundwater discharge port as the groundwater discharge port, and the second treatment tank uses the second treatment tank. One of the third groundwater outlet or the fourth groundwater outlet is connected to the groundwater outlet of the first treatment tank and used as the groundwater inlet, and the second treatment tank is the first groundwater outlet or the second groundwater outlet of the secondary treatment tank. Provides a contaminated groundwater purification device using the other of the groundwater outlet of the secondary treatment tank.

In addition, the present invention comprises the steps of pumping the contaminated ground water from the first well flows into the treatment tank including the diffuser: introducing air into the diffuser through an air blower; Purifying the contaminated ground water through air bubbles generated from the diffuser; And it provides a method of purifying contaminated ground water comprising the step of introducing the purified ground water into a second well.

In addition, the present invention is the diffuser is an air collecting unit for collecting the air supplied from the air blower, an air bubble discharge unit for converting the air collected from the air collection unit into a bubble form and discharged and the air collection unit It comprises a connecting pipe for delivering air to the air bubble discharge portion, and provides a method for purifying contaminated ground water, characterized in that it comprises a plurality of fine pores on the top, side or bottom of the air bubble discharge portion.

The present invention also includes a treatment tank including a first treatment tank including a first acid engine and a second treatment tank including a second acid engine, and purifying contaminated groundwater through air bubbles generated from the acid engine. And introducing the purified contaminated water into the second well includes: purifying the contaminated ground water through air bubbles generated from the first acid pipe; Introducing the groundwater purified by the first acid engine into a second treatment tank including the second acid engine; Introducing air into the second diffuser through an air blower; Purifying the ground water purified by the first acid engine through air bubbles generated from the second acid engine; And introducing the groundwater purified by the second acid engine into the second well.

The contaminated groundwater purification apparatus and purification method according to the present invention as described above has the effect of continuously purifying by contaminating the contaminated groundwater at the same time as amniotic fluid and then flowing the purified wastewater back into the ground.

In addition, it is possible to divide the treatment device into a primary and a secondary device so that an appropriate purification device can be installed according to the pollution degree of the groundwater contaminated area more efficiently.

In addition, the present invention is to install a diffuser (Membrane disc type diffuser) as a fine air generating device in the lower portion of the treatment tank and the air generated from the air blower outside the treatment tank through the air pipe (Air pipe) (Membrane disc type air diffuser, and the air pipe is disposed from the air blower to the height of the treatment tank perpendicular to the ground, piped through the letter 'C' at the top of the treatment tank, and penetrated perpendicularly to the ground into the treatment tank again. By connecting the diffuser (Membrane disc type diffuser), the air pipe is arranged long, and the air pressure can be adjusted.

In addition, in the treatment tank for pumping and treating the contaminated ground water, the present invention has an effect that can maintain the outflow amount of the ground water to clean the contaminated ground water by having a discharge port at the top of the treatment tank.

1 is a schematic configuration diagram of a purification apparatus for removing groundwater contaminated with volatile organic compounds using air by a general air stripping apparatus.
Figure 2a is a schematic diagram showing a contaminated groundwater purification apparatus including an air stripping device according to the first embodiment of the present invention.
Figure 2b is a cross-sectional view showing the diffuser of the contaminated groundwater purification self-government comprising an air stripper device according to the present invention.
Figure 2c is a plan view showing the diffuser of the contaminated groundwater purification apparatus including the air stripper device according to the present invention.
3 is a schematic diagram illustrating a contaminated groundwater purification apparatus according to a second embodiment of the present invention.
4A is a schematic cross-sectional view illustrating a process of purifying contaminated groundwater according to a second embodiment of the present invention.
4B is a schematic flowchart illustrating a process of purifying contaminated groundwater.
5 is a table showing the concentration change and the treatment efficiency of the discharged water to the source of pollution after installing the groundwater pollution purification apparatus according to the first embodiment of the present invention in a particular pollution area.
Figure 6 is a table showing the change in concentration and treatment efficiency of the discharged water to the polluted water after installing the groundwater pollution purification apparatus according to the second embodiment of the present invention in a specific pollution area.
FIG. 7 is a graph showing concentration changes and treatment efficiencies of primary and secondary treatments of effluent water for pollutant water according to a second embodiment of the present invention.

Advantages and features of the present invention, and methods of achieving the same will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. &Quot; and / or "include each and every combination of one or more of the mentioned items. ≪ RTI ID = 0.0 >

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic configuration diagram of a purification apparatus for removing groundwater contaminated with volatile organic compounds using air by a general air stripping apparatus.

This device is a device that supplies volatile organic compounds by removing the volatile organic compounds by evaporating pollutants dissolved in groundwater from the air by supplying air while the contaminated water flows down to the bottom of the air stripper treatment tank. Packed towers or other water purification tanks and aeration tanks supplying air.

In general, the air stripping device is equipped with a spray nozzle to spray contaminated water on a packed tower, and a fan to direct air back in the direction of water flow, so that the purified water can be collected. Install the pump at the bottom of the tower. Auxiliary equipment includes air preheater, automatic control device and exhaust gas treatment device.

Referring to Figure 1, first contaminated ground water 101 is moved along the groundwater inlet pipe 103 to the upper treatment tank 104 of the air stripping 100 by the pump pump 102, the treatment tank 104 It is injected by the injection device 105 located in the upper portion and flows down the treatment tank 104.

At this time, the air stripping treatment tank is filled with internal packing material 106 such as plastic, steel, ceramic, etc., so that the contaminated ground water sprayed from the upper portion of the treatment tank flows through the space between the fillers 106, and at the same time, Air is blown by the air blower 107 installed in the lower part of the treatment tank 104, and the volatile organic compound, which is a contaminated source of water, is evaporated with the air.

The evaporated air and volatile organic compounds are then passed through the space of the internal filler 106 to the top of the treatment tank 104 and the air and volatile organic compounds 108 collected on the top of the treatment tank are aired along the pipe 109. It is moved to the processing apparatus 111 and discharged to the atmosphere after the treatment.

In addition, the pollutant discharged water 101 ′ may be collected under the treatment tank 104, discharged to the outside of the treatment tank along the groundwater discharge pipe 110, and discharged to a river or the like.

Groundwater purification device contaminated by general air stripping as described above can remove groundwater pollutants relatively easily when volatile organic compounds that can be easily evaporated, but the amount that can be introduced because the inside of the stripper treatment tank needs to be filled with filler. There is a problem that the purification efficiency of the contaminated groundwater can be reduced so that the treatment period is high, and the costs for the operation and maintenance are continuously required.

Hereinafter, the contaminated groundwater purification apparatus and purification method according to the present invention will be described. On the other hand, the contaminated groundwater purification apparatus and purification method according to the present invention is designed by applying and modifying a part of the above-described general air sprinkling method, can be referred to collectively as "positive pore method" for contrast with the general method. have.

Figure 2a is a schematic diagram showing a contaminated groundwater purification apparatus including an air stripping device according to the first embodiment of the present invention.

Referring to FIG. 2A, the contaminated groundwater purification apparatus to which the air stripping device according to the first embodiment of the present invention is applied includes a treatment tank 205 for purifying contaminated groundwater by inflow and air for supplying air to the treatment tank. A blower 107 and a pump pump 102 for introducing the ground water into the treatment tank.

At this time, the present invention is characterized in that it comprises a diffuser (Membrane disc type diffuser) 209 located in a predetermined region of the lower portion of the treatment tank 205, wherein the diffuser is a micro-pores as will be described later Characterized in that it comprises a.

On the other hand, the contaminated groundwater purification apparatus to which the air stripping device according to the first embodiment of the present invention is applied is a groundwater inflow pipe 103 for introducing the groundwater into the treatment tank through the pump pump to discharge the groundwater purified from the treatment tank. It may further include a blower pipe 208 for supplying the ground water discharge pipe 110 and the air supplied from the air blower to the treatment tank.

In addition, a contaminated groundwater inlet 201 may be installed at an upper portion of the treatment tank 205, and purified groundwater outlets 211 and 211 ′ may be installed at a lower side of the contaminated groundwater inlet 201. 202 to 204) may be further included to increase drainage efficiency.

In this case, the ground water outlets 211 and 211 ′ may be installed at a height of 2/3 to 3/4 of the sides from the upper portion of the treatment tank, thereby maintaining a constant amount of contaminated groundwater introduced into the treatment tank. have.

However, the position of the groundwater inlet 201 and the groundwater outlets 211 and 211 ′ is not limited to the first embodiment, which is purified by making the height of the groundwater inlet 201 higher than the groundwater outlets 211 and 211 ′. It is understood that it is for facilitating drainage after the treatment.

In addition, an air pipe insertion port 210 for introducing air blown from the air blower may be installed above the treatment tank 205.

Meanwhile, a control box 206 for power supply and driving control of the air blower 107 may be mounted, and the air blower 107 and the control box 206 are exposed or exposed to the ground through the protection facility 207. It may be installed in a buried form.

Looking at the purification process of the contaminated groundwater according to the first embodiment of the present invention, first, the wells are drilled in two places of water veins where contaminated groundwater is collected. In this case, the first well is installed in a high pollution concentration, and the second well is installed in a non-polluted vein with a relatively low pollution concentration compared to the first well, and the veins of the second well are connected in the first well. And the distance l between the wells is generally greater than 100 m. Next, the contaminated groundwater 101 of the first well is pumped by the pump 102 and flows into the treatment tank along the groundwater inlet pipe 103 to the groundwater inlet 201 of the treatment tank. At the same time, the air blown by the air blower 107 is introduced through a diffuser (Membrane disc type diffuser) 209 installed in the lower portion of the treatment tank along the air blowing pipe 208 to generate air.

In this case, as described above, in the present invention, a diffuser (Membrane disc type diffuser) 209 for generating the air blown from the air blower 107 as fine air is included in the lower portion of the treatment tank 205. It is done.

FIG. 2B is a cross sectional view of a diffuser 209 of a contaminated groundwater purification apparatus including an air stripper device according to the present invention, and FIG. 2C is a diffuser of a contaminated groundwater purification apparatus including an air stripper device according to the present invention. 209 is a plan view.

Referring to Figures 2a, 2b and 2c, the air generation principle of the diffuser (Membrane disc type diffuser) 209 according to the present invention is as follows.

First, referring to FIGS. 2A to 2C, the diffuser 209 according to the present invention includes an air collecting unit 209b for collecting air supplied from an air blowing pipe, and foamed air collected from the air collecting unit. And an air bubble discharge portion 209a for converting the air bubbles into the air bubble discharge portion, and a connection pipe 209c for delivering air to the air bubble discharge portion.

In this case, the air bubble discharge portion 209a includes a plurality of micropores 209d for converting air into a bubble shape.

More specifically, the air supplied from the air blowing pipe 208 is collected to the air collecting unit 209b, the collected air moves along the connecting pipe 209c, so that the micro voids of the air bubble discharge unit 209a Fine air bubbles are generated through 209d. In the process of moving the air bubbles above the treatment tank 205, volatile organic compounds dissolved in the contaminated groundwater 101 introduced into the treatment tank 205 evaporate with the air, thereby reducing the concentration of the pollutant. Meanwhile, the pollutant with reduced concentration is discharged to the air outlet 212 above the treatment tank 205 together with air in the form of gas.

At this time, the air bubble discharge portion 209a preferably includes a plurality of micropores 209d on the upper surface of the air bubble discharge portion, so that air can be injected in the upper direction of the treatment tank 205, but the drawings Although not shown, a plurality of micropores may also be included on the side or bottom of the air bubble emitter.

In addition, the shape of the air bubble discharge portion 209a is not limited to the short cylindrical shape of the upper surface is curved as protruding toward the center, as in the embodiment of Figures 2b to 2c, thus, a long cylindrical, triangular prism Various shapes such as a mold, a square column shape, a hexagonal column shape, and the like are possible, and the number of the air bubble discharge parts 209a may be installed by varying the number of connection pipes 209c inserted into the side of the collection tank 209b. Can be.

According to the positive pumping method according to the present invention, since the air generated by the air blower 107 is converted to finer particles than the air blowing only by the general air blower only, the contact of the air in contact with the contaminated groundwater 101 As the area is increased, the volatile organic compounds dissolved in the contaminated groundwater can be evaporated in a short time with high efficiency.

In addition, in the general air stripping apparatus, the efficiency of pumping treatment can be increased by securing a space inside the treatment tank 205 without using a packing material that occupies the space inside the treatment tank 104. There is.

In addition, as a characteristic part of the present invention, the air blown from the air blower 107 without directly inserting the air blower 107 into the side surface of the treatment tank 205 is the first blow pipe 208a to the third. It is to be supplied to the diffuser 209 via the blow pipe 208c.

2A, the blower pipe 208 according to the present invention has one side of the first blower pipe 208a connected to the air blower 107, and the first blower pipe has a treatment tank in a direction perpendicular to the ground. 205 extends to an upper height outside, and the other side of the first blowing pipe 208a is connected to one side of the second blowing pipe 208b having a 'c' or 'U' shape, and the second blowing pipe ( The other side of 208b may have a structure that is connected to the third blower pipe 208c in a direction perpendicular to the ground.

In addition, the third blower pipe 208c is inserted into the treatment tank 205 through the air pipe insertion hole 210 of the upper portion of the treatment tank 205 and connected to the air collection part 209b of the diffuser 209. do.

On the other hand, the air blower 107 can control the blowing ability by operating the control box 206.

The blower pipe 208 is arranged by connecting the first blower pipe 208a to the third blower pipe 208c for a long time, so as to secure a blower space to adjust the blower pressure of the air, separate from the diffuser 209 Just by lengthening the length of the blower pipe 208 without the power supply of, it is possible to easily adjust the injection pressure of the blown air.

In addition, through the arrangement of the blower pipe 208, due to the water pressure of the groundwater introduced into the treatment tank 205, it is possible to prevent the water flow back through the air bubble discharge portion 209a of the diffuser 209. Can be.

Next, the groundwater in which the volatile organic compound is purified may be discharged through the discharge ports 211 and 211 'located at the upper side of the treatment tank 205.

The discharged water 101 'purified from the treatment tank 205 through the outlets 211 and 211' may be introduced back into the second well that was dug for initial installation.

The characteristic part of the present invention is that after purifying the contaminated groundwater 101 of the first well, the discharged water 101 'is introduced again into the basement of the second well without discharge of the stream or the like. Groundwater is introduced into the first well along the water vein to dilute the groundwater contamination concentration of the first well so that it can be continuously purified.

However, the present invention is not limited only to diluting the contaminated ground water by re-introducing the purified discharge water into the ground water, and discharges the purified ground water to the river, or separate outlets in the treatment tank 205 to secure insufficient water quality. 202 ~ 204) is also discharged as in the prior art.

According to the pumping pore method according to the present invention, the purified groundwater is discharged to the river has the advantage that the utilization of groundwater can be improved compared to the general air stripping device that could not be utilized as groundwater anymore.

On the other hand, in the region where the pollution concentration of groundwater is high, only the primary treatment tank 205 by air stripping may be difficult to remove volatile organic compounds as a source of pollution, so that a secondary treatment tank may be additionally installed.

That is, the groundwater purified by the primary treatment tank 205 of the air stripping apparatus should be discharged by checking the pollution concentration of the discharged water 101 'through water quality analysis to determine whether it meets the emission standard. In this case, after additionally installing a secondary treatment tank 305 for the secondary treatment, the primary wastewater can be transferred to the secondary treatment tank and discharged after the secondary air stripping treatment in the same manner as the primary.

3 is a schematic diagram illustrating a contaminated groundwater purification apparatus including an air stripping apparatus according to a second embodiment of the present invention.

The secondary purification apparatus 300 to which the air stripping apparatus is applied has a configuration and a treatment process of the above-described primary pollution groundwater purification apparatus 200 as described above with reference to FIG. 2, and thus the detailed description thereof will be omitted.

However, referring to FIG. 3, one of the first groundwater outlet 211 or the second groundwater outlet 211 ′ of the primary treatment tank 205 and the first groundwater outlet 311 of the secondary treatment tank 305 or One of the second ground water discharge ports 311 ′ may be inserted into the connection pipe 214 to transfer the purified water to the secondary treatment tank 305.

In this case, one of the first groundwater outlet 311 or the second groundwater outlet 311 ′ of the secondary treatment tank 305 may be used as an inlet, and the first groundwater outlet 311 or second which is not used as an inlet. The other one of the groundwater discharge ports 311 ′ may be used as a discharge pipe for discharging the purified secondary treatment purified groundwater.

In addition, the secondary purified wastewater is discharged through the first groundwater discharge port 311 of the secondary treatment tank and flows into the second well along the groundwater discharge pipe 110 in the same manner as the above-described primary pollution groundwater treatment process. Purification can be achieved by diluting the groundwater continuously.

4A is a schematic diagram illustrating a process of purifying contaminated ground water according to a second embodiment of the present invention, and FIG. 4B is a schematic flowchart illustrating a process of purifying contaminated ground water. Groundwater flow is shown by arrows.

Referring to Figures 4a to 4b, the process of purifying the contaminated ground water according to the second embodiment of the present invention will be described.

First, after hydrogeological preliminary examination considering the TCE contamination concentration value of contaminated groundwater in the groundwater contaminated area, two places of water veins where contaminated groundwater collects are designated, and first and second wells are respectively installed (S1).

Next, the contaminated groundwater 101 is pumped into the pump pump 102 and introduced into the primary treatment tank 205 through the groundwater inlet 201 located above the treatment tank along the groundwater inflow pipe 103 (S2).

Subsequently, when the air is blown by the air blower 107, the blown air flows into the diffuser 209 provided in the lower part of the primary treatment tank 205 along the blowing pipe 208 (S3).

In this way, the air introduced into the diffuser 209 is converted into fine bubbles and injected into the primary treatment tank 205 (S4), and the groundwater is evaporated into the bubbles together with the volatile organic compound that is the pollutant dissolved in the groundwater. Purified and the evaporated air is discharged to the air outlet 212 of the upper portion of the primary treatment tank is discharged in the air (S5).

Next, the contaminated groundwater in which the volatile organic compound is first purified is discharged to the groundwater outlet 211 ′ of the primary treatment tank 205, and the groundwater inlet 311 ′ of the secondary treatment tank 305 is discharged through the groundwater inlet 311 ′. It flows into the tea processing tank 305 (S6).

Subsequently, the first purified polluted groundwater introduced into the secondary treatment tank 305 is secondaryly purified in the secondary treatment tank through the same process of S1 to S5 (S7).

The secondary treated groundwater from which the pollutant is removed through the processes of S1 to S5 is introduced into the second well that was dug for initial installation through the groundwater discharge port 311 located above the secondary treatment tank 305 (S8). ).

In addition, the groundwater re-introduced into the underground wells by removing the pollutants is diluted with the existing contaminated groundwater, thereby reducing the concentration of the groundwater contamination (S9).

Next, the groundwater of the second well with reduced pollution concentration flows into the first well along the vein to dilute the polluted concentration of the first well, and the groundwater of the first well with reduced pollution concentration is pumped again and S1 to S9 The process is repeated, and in this way, the first and second wells, as well as the surrounding ground veins flowing along the veins of contaminated groundwater are extensively purified (S10).

 As described above, an advantage of the present invention is to increase the utilization of the ground water by allowing the contaminated ground water to be diluted through the purified ground water to be continuously purified by flowing the discharged water purified by the contaminated ground water back to the ground. Would have to.

5 is a result table showing the efficiency of the TCE (Trichloroethylene) concentration change of the discharge water for 5 days after the installation of the groundwater pollution purification apparatus according to the first embodiment of the present invention in a specific pollution area.

According to the regulation of industrial wastewater discharge regulated by the Water Quality Conservation Act, the TCE emission limit for river effluent is less than 0.3mg per liter of eluate, so the groundwater purification treatment system should be designed to reflect this. After the investigation, it is possible to selectively apply whether the treatment tank is composed of the primary treatment tank or the secondary treatment tank in consideration of the TCE contamination concentration value of the contaminated groundwater.

The design of this system corresponding to the result of FIG. 5 is to configure the groundwater treatment device in one set so that the discharge water residual pollution concentration is less than 0.3 mg / L in the case of about 100m ³ of daily pumped water, and reflects the design criteria. to a desired material in this experiment, the amount of transmission of the processing tank capacity of 2m ^3, treated 1m ³ to ^{22.8m 3 / min 2.55kw, 380V /} 3P, Max 3.2m 3 / min, the air Specifications Max 4,000mmAq Four blower and diffuser (Membrane Disc Type Diffuser) are applied.

Subsequently, referring to FIG. 5, sampling of water quality was taken 0 to 3 times in the raw water, the discharged water, and the treatment tank. As a result of TCE analysis, the detected concentration in the raw water of the contaminated groundwater was 0.479 mg at 15:30 on January 5 / L, the detection concentration increased with increasing pumping time to 1.119 mg / L at 15:00 on 9 January. The average contamination detection concentration of raw water is 0.729 mg / L (minimum 0.479 mg / L to maximum 1.199 mg / L), and the average residual contamination detection concentration of effluent after treatment is 0.091 mg / L (minimum 0.052 to 0.133 mg / L) The average efficiency of the treatment system was 87.2% (min 80.7% ~ max 90.5%).

Figure 6 is a result table showing the efficiency of the three days after the change of the TCE (Trichloroethylene) concentration of the discharge water for the contaminated water after installing the groundwater pollution purification apparatus according to the second embodiment of the present invention.

As in the design conditions of FIG. 5, when the primary treatment tank alone is operated in consideration of the TCE contamination concentration value of the contaminated groundwater after hydrogeological preliminary investigation of the groundwater contaminated area, it is expected to exceed the standard of the effluent contamination concentration. , 1 day yangsuryang was increased efficiency of about 100m ³ of the drain water when the residual contamination levels the two modifications to the installation processing system for groundwater treatment devices in series to meet the less than 0.3mg / L.

In addition, since the necessary materials of the present experiment reflecting the design criteria are applied to two sets in the same configuration as in FIG. 5, detailed descriptions thereof will be omitted.

Subsequently, referring to FIG. 6, when the contaminated groundwater was pumped with 100m3 of pumped water per day by applying the above design conditions, the mean contamination detection concentration of raw water was 1.237mg / L (min. 0.874mg / L ~ 1.469) mg / L), and the average residual contamination detection concentration of the discharged water (No. 2) after the secondary treatment is 0.018 mg / L (min. 0.12 mg / L to max. 0.021 mg / L), and the average efficiency of the treatment system (raw water -N0). .2) was 98.6% (min. 98.5% ~ max. 98%).

Referring to the results table of FIG. 5 and FIG. 6, as a result of operating one set of treatment systems, the average value of the raw water contamination detection concentration was 0.729 mg / L, and the average value of the residual water contamination detection concentration was 0.019 mg / L. However, as a result of operating two sets of treatment systems, the average value of raw water pollution detection concentration was 1.237mg / L, and the average value of residual pollution detection concentration in the secondary treatment system was 0.017mg / L, which was 98.6%. Depending on the efficiency of the system design, up to 99% of the pollutants can be removed.

As described above, depending on the pollution detection concentration of the groundwater contaminated area, one or two or more tanks can be selectively installed to remove the pollutant.

FIG. 7 is a graph for estimating the residual contamination detection concentration of the discharged water with respect to the detection concentration of the source water when the primary and secondary treatment tanks are configured at a daily pumping amount of 100 m 3, referring to the results of FIGS. 5 and 6. .

Referring to FIG. 7, when the concentration of the contaminated water is 2.46 mg / L, the residual contamination detection concentration of the primary treated effluent is 0.33 mg / L, which is a reference value of 0.3 mg / L. Exceed. Therefore, in areas where the detected concentration of contaminated water exceeds 2.46 mg / L, the contaminant cannot be sufficiently removed by a single treatment system alone, so a secondary treatment tank may be installed together to remove the contaminant.

Subsequently, referring to the graph of 'treatment concentration 2' of FIG. 7, when the detected concentration of the contaminated water is 2.46 mg / L or more and 5.51 mg / L or less, if two purification treatment systems are installed, the residual contamination of the discharged water compared to the contaminated water With a detection concentration of 0.04 mg / L or more and 0.09 mg / L, the treatment efficiency is 98.5% to 98.3%, all of which can satisfy the treatment efficiency of 98% or more.

Based on the expected values as described above, the present invention can efficiently remove the pollutant by constructing and applying a purification device appropriately for the first or second order by applying the emission standard value when the pollution detection concentration of the groundwater contaminated area is high. It can be effective.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: air stripping 101: contaminated groundwater
101 ': discharge water 102: pumping pump
103: groundwater inlet pipe 104: treatment tank
105: injector 106: internal filler
107: air blower 108: air and volatile organic compounds
109: air discharge pipe 110: groundwater discharge pipe
111: air treatment device 200: primary purification device
201: Groundwater inlet 202-204: Outlet
205: primary treatment tank 206: control box
207: Shelter 208: Ventilation piping
209: diffuser 210: air piping insertion port
211, 211 ': Groundwater outlet 212: Air outlet
214: connector 300: secondary purifier
305: 311, 311 'groundwater outlet for secondary treatment tank

Claims (10)

A treatment tank including an diffuser in a predetermined region of the internal space;
An air blower for supplying air to the diffuser; And
A pump for pumping groundwater into the treatment tank;
The diffuser is characterized in that it comprises a plurality of fine pores,
The treatment tank includes a first treatment tank and a second treatment tank,
The first treatment tank includes a first groundwater outlet and a second groundwater outlet, and the second treatment tank includes a third groundwater outlet and a fourth groundwater outlet,
The first treatment tank uses any one of the first groundwater discharge port or the second groundwater discharge port as the groundwater discharge port,
The second treatment tank is used as a groundwater inlet by connecting any one of the third groundwater outlet or the fourth groundwater outlet of the second treatment tank with the groundwater outlet of the first treatment tank,
The secondary treatment tank is a contaminated groundwater purification apparatus using the other of the first groundwater outlet or the second groundwater outlet of the secondary treatment tank as the groundwater outlet of the secondary treatment tank. The method of claim 1,
The diffuser may include an air collecting unit for collecting air supplied from the air blower, an air bubble discharge unit for converting and discharging the air collected from the air collecting unit into a bubble form, and air of the air collecting unit. A connector for delivery to the discharge,
Contaminated groundwater purification apparatus comprising the plurality of fine pores on the top, side or bottom of the air bubble discharge. The method of claim 1,
Further comprising a blower pipe for supplying air supplied from the air blower to the diffuser, the blower pipe includes a first blower pipe, a second blower pipe and a third blower pipe,
One side of the first blower pipe is connected to the air blower, and the first blower pipe extends to an upper height outside the treatment tank in a direction perpendicular to the ground, and the other side of the first blower pipe is connected to the second blower pipe. Jointed with one side,
The other side of the second blower pipe is connected to one side of the third blower pipe in a direction perpendicular to the ground,
And the other side of the third blower pipe is inserted into the treatment tank through an air pipe insertion hole in the upper portion of the treatment tank, and connected to an air collection unit of the diffuser. The method of claim 1,
The treatment tank includes a first treatment tank or a second treatment tank,
According to the degree of contamination of the groundwater, the groundwater purification apparatus for polluted groundwater, characterized in that the primary treatment tank or the secondary treatment tank is selected or applied alone or more and installed in the contaminated area. The method of claim 1,
The treatment tank further includes a contaminated groundwater inlet installed above the treatment tank and a groundwater outlet located below the contaminated groundwater inlet.
The groundwater discharge port is contaminated groundwater purification apparatus, characterized in that located at a height of 2/3 to 3/4 points from the upper side of the treatment tank. delete Pumping contaminated ground water from the first well and introducing it into a first treatment tank including a first acid engine;
Introducing air into the first diffuser through a first air blower;
Purifying the contaminated ground water through air bubbles generated from the first acid engine;
Introducing groundwater purified by the first acid engine into a second treatment tank including a second acid engine;
Introducing air into the second acid engine through a second air blower;
Purifying the ground water purified by the first acid engine through air bubbles generated from the second acid engine; And
A method of purifying contaminated groundwater comprising introducing groundwater purified by the second mountain engine into a second well. The method of claim 7, wherein
The first acid engine and the second acid engine each includes an air collecting unit for collecting air supplied from the air blower, an air bubble discharge unit for converting and discharging air collected from the air collecting unit into a bubble form; It includes a connecting pipe for delivering the air of the air collector to the air bubble discharge,
And a plurality of fine pores on the top, side, or bottom of the air bubble discharge portion. delete The method of claim 7, wherein
Wherein the first well is a high pollution concentration, and the second well is polluted groundwater purification method, characterized in that the pollution concentration is lower than the first well, or a non-contaminated area.

Images