KR101699049B1 - Air stripping devices for using a jet nozzle and VOCs contaminated groundwater purification system using thereof - Google Patents

Abstract

The present invention relates to a VOCs contaminated groundwater purification system with an air stripping device using a jet nozzle. More specifically, the present invention relates to a VOCs contaminated groundwater purification system with an air stripping device using a jet nozzle which pumps groundwater contaminated with VOCs, harmful pollutant of groundwater, on the ground, and purifies the same through physical stripping.

Description

Technical Field [0001] The present invention relates to a VOCs contaminated groundwater purification system using an air stripping apparatus using a jet nozzle,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a VOC-contaminated groundwater purification system using an air stripping apparatus using jet nozzles, and more particularly, The present invention relates to a VOCs contaminated groundwater purification system using an air stripping apparatus using an improved jet nozzle capable of pumping ground water contaminated with VOCs to the ground and purifying the same through physical stripping.

Underground is polluted by various factors such as industrial wastes buried in the ground, oil leaking into the ground, and organic solvents.

Various methods have been attempted to block or purge contaminants from underground pollutants in order to prevent contamination of groundwater by contaminants discharged from underground pollutants generated in the ground due to such a cause.

In-situ method and ex-situ method are used to purify polluted ground water. In particular, ex-situ method is a method of purifying contaminated ground water by using in-situ method and ground- It is necessary to take measures such as leakage problem, depletion of ground water and subsidence problem, but it is easy to measure and control the treatment process because it is treated on the ground.

These groundwater treatment methods are based on the pumping and treatment method. The methods of purging and purifying groundwater contaminated with volatile organic compounds (VOCs: PCE, TCE, etc.) include biological, chemical and physical treatment methods .

Among them, the physical treatment of volatile organic compounds (VOCs) in the contaminated ground water is largely based on the degassing method. The degassing method includes a method using a packed column air stripper, a method using a porous plate type air degassing apparatus A method using a Tray Air Stripper, and a method using a diffused aeration stripper.

Here, the Sieve Tray Air Stripper is well illustrated in the Technical Guide (Design Guide No. 1110-1-1) of the United States Engineers, and the flow of water and air during the treatment is shown in FIGS. 1 and 2 As an example.

For example, groundwater purification technology based on the pumping and treatment technique is used to install a well in a groundwater aquifer, to pump the contaminated groundwater by a water pump, to store the groundwater in the storage tank, and to transfer the stored groundwater to the air- do.

At this time, it is possible to install a heat exchanger if necessary, such as during the winter season.

In the air degassing apparatus, a plurality of perforated plates are provided, and water is supplied to the uppermost tray, and the water flows sequentially to the lower end through a drop tube, (VOCs) are deaerated into air from the groundwater, and the contaminants (VOCs) are removed from the groundwater. In addition, the air is supplied through a diffuser at the lowermost end, VOCs) is deaerated through a desiccator installed at the top of the air degassing apparatus, purified through an exhaust gas processor, and then discharged to the atmosphere.

The purified groundwater passing through the air degassing apparatus is discharged after treatment using a re-degassing treatment or an additional treatment apparatus according to the residual concentration.

However, the effluent removal efficiency was 96% (TCE: 0.898 ~ 1.009mg / L after treatment, 0.037 ~ 0.039mg / L after treatment) But the groundwater purification standard (TCE: 0.03 mg / L) is not met.

Therefore, there is a disadvantage that cost and time are increased due to the necessity of recycling or performing an additional apparatus or process.

In addition, the depletion of water in the aquifer occurs due to the discharge after the treatment, which causes groundwater depletion and the problem of subsidence due to lowering of the water level.

Korea Patent Registration No. 10-1307927 (2013.09.06.) 'Optimization System for Groundwater Contaminated with Volatile Organic Substances'

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems of the prior art, and it is an object of the present invention to provide a method and apparatus for removing groundwater contaminated with volatile organic compounds (VOCs) The present invention provides a groundwater purification system for contaminated VOCs using an air stripping apparatus using an improved jet nozzle.

In order to achieve the above-mentioned object, the present invention provides a water purifier comprising: a water purifier (9) installed in a contaminated groundwater area and including an underwater pump (6) capable of collecting groundwater; A gas-liquid separator (5) connected to the pumping cell (9) and performing primary degassing while separating the collected groundwater by gas-liquid separation; A reservoir 8 connected to the gas-liquid separator 5 to store only the separated liquid; An air stripper (1) through which liquid stored through a feed pump (4) provided at a discharge end of the reservoir (8) is supplied; An infusion hopper (10) for returning groundwater, which is finally deaerated liquid through the air stripper (1), to the aquifer; And an air filter (2) for trapping and purifying the separated gas by connecting the upper end of the gas-liquid separator (5) and the upper end of the air stripper (1) The first air nozzle 5-1 is further provided with an air suction / recognition first jet nozzle 5-1; A second jet nozzle 4-1 having the same shape as that of the first jet nozzle 5-1 is further provided at the inlet end of the air stripper 1; A ring blower 3 is further provided at the lower part of the air stripper 1 to supply air from the lower side to the upper side and air stripping is performed using a jet nozzle for deaerating the remaining contaminants in the groundwater, ≪ RTI ID = 0.0 > VOCs < / RTI > contaminated groundwater purification system using apparatus;
The air stripper 1 further includes a sieve tray 1-2 composed of three columns and six stages, and the groundwater is supplied to the groundwater inlet 1-1 and flows along the sieve tray 1-2 The movement from the upper sieve tray 1-2 to the lower sieve tray 1-2 is made through the drop tube 1-3 and the lower sieve tray 1-2 is de- The groundwater flows along the drop tube 1-3 and is supplied to the bottom of the aeration tank 1-5 and then flows to the upper end of the discharge tank 1-5. And the air that has passed through all of the sieve trays 1-2 is sent to a demister (not shown) through the ground water outlet 1-6, 1-9), and moisture is removed. The air is passed through the air outlet (1-10) and supplied to the air filter (2). VOCs are removed and cleaned ≪ / RTI >
Air supplied to the air stripper 1 is supplied through an air inlet 1-7 and air passing through the air stiffener 1 passes through the air diffuser 1-8 to a plurality of And the air baffle inlet 1-7 is configured to have a U-shape to prevent groundwater from flowing back to the ring blower 3, so that the air in the aeration basin 1-4 ) Above sea level;
A number of working windows 1-11 are provided corresponding to the number of heat of the sheave tray 1-2;
The air diffusers 1-8 are arranged in three rows in the flow direction of the treated water in consideration of the route in which the ground water reaches the discharge tank 1-5 and the air vent hole size of the diffuser 1-8 is 3 / 16 inch, the outlet tank 1-5 is composed of three chambers by two diaphragms, the first diaphragm being configured to overflow the diaphragm when the groundwater passes through the aeration tank 1-4, The second diaphragm is configured to pass downward so that the water head up to the ground water outlet (1-6) is acted upon by pressure so that the air in the aeration tank (1-4) is not released through the ground water outlet (1-6) So as to flow in the direction of the sheave tray 1-2;
The air filter 2 is composed of two compartments in the upper and lower compartments. The lower compartment is a space through which the contaminated air of VOCs introduced into the air inlet 2-1 is dispersed equally in the upper compartment, Is connected to the cleaning port (2-5) and is configured to clean some dropped activated carbon; The upper compartment is composed of a space for storing activated carbon and a clearance space, and is connected to the manhole (2-4). A VOCs contaminated groundwater purification system using the air striping apparatus using the jet nozzle is provided.

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According to the present invention, the removal efficiency of the volatile organic compounds contaminated with groundwater is increased. In addition, since deaerating air is supplied without any additional power unit, cost reduction and efficient control are possible, and there is no need of reprocessing, and the effect of simplifying the processing process due to reduction of reprocessing rate can be obtained.

In addition, by injecting the extracted and purified reprocess water into the aquifer again, it is possible to maintain the quantity of the aquifer and to prevent the depletion of the groundwater.

Furthermore, the groundwater flow is controlled hydraulically through proper injection arrangement to prevent groundwater contamination and diffusion, thereby minimizing the contamination range of the groundwater, thereby reducing the purification period as a result.

In addition, it is possible to purify groundwater contaminated with volatile organic compounds only by physical treatment, thereby facilitating water quality management and economically beneficial effects.

FIG. 1 and FIG. 2 are illustrations showing a conventional example.
3 is an exemplary configuration outline showing the overall configuration of a system according to the present invention.
FIGS. 4 and 5 are views showing the structure of the air stripper in more detail in FIG.
6 is an exemplary view showing an air filter constituting the system according to the present invention in detail.
7 is a view showing an air feeder utilizing a feed pump.
8 is an exemplary view showing a gas-liquid separator.
FIG. 9 is a view showing an example of installation of an underground water purification system.
And
10 is a flow chart showing a purification processing method using the system according to the present invention.

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

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

As shown in FIG. 3, the system according to the present invention includes a pumping cell 9 installed in a groundwater contaminated area.

The pumping cell 9 is a pump well, which is installed to be able to collect groundwater by using an underwater pump 6 as a pumping well.

The pumping cell 9 is connected to the gas-liquid separator 5. The gas-liquid separator 5 is provided with a first jet nozzle 5-1 capable of performing a degassing function on the suction side.

The gas-liquid separator 5 is connected to the reservoir 8 and the reservoir 8 is configured to supply only the liquid separated from the gas-liquid to the air stripper 1 through the feed pump 4 .

At this time, a second jet nozzle 4-1 is provided at the inlet end of the air stripper 1 to increase the degassing action.

In addition, a ring blower 3 is installed on the lower part of the air stripper 1 to supply air to aeration.

The ground water discharged from the air stripper 1 is designed to be injected back into the underground aquifer through the injection well 10.

In particular, the upper end of the gas-liquid separator 5 and the upper end of the air stripper 1 are connected to the air filter 2 through a collecting pipe, In the filtered state, only the clean air is discharged to the atmosphere.

In addition, the ring blower 3 and the feed pump 4, including the pumping cylinder 9, are designed to be driven and controlled through the control panel 7.

Thus, the contaminated groundwater is pumped by the underwater pump 6 installed in the pumping cell 9 and sent to the gas-liquid separator 5, and when the contaminated groundwater is sent to the gas-liquid separator 5, the first jet nozzle 5- 1), air sucking and deaeration of VOCs proceed.

Then, the contaminated groundwater sent to the gas-liquid separator 5 is stored in the storage tank 8 after the primary degassing is proceeded. At this time, the supplied air contains VOCs, is sent to the air filter 2, .

The groundwater stored in the reservoir 8 is sent to the air stripper 1 by the operation of the feed pump 4. At this time, as in the gas-liquid separator 5, the air is sucked by the second jet nozzle 4-1, Second deaeration of VOCs proceeds.

Particularly, in the air stripper 1, the groundwater moves from the upper part to the lower part, and the air supplied by the ring blower 3 is supplied to the air diffuser 1 - 8 (see FIG. 3) To the upper portion.

Therefore, VOCs in the groundwater are degassed by contact with each other while traveling. Therefore, the concentration of VOCs in the groundwater decreases as the concentration of VOCs in the groundwater increases.

After this process, the air stripper 1 is subjected to third and fourth degassing processes.

If the concentration of VOCs in the ground water is higher than the target concentration even though the first to fourth degassing processes are repeated once, the whole or a part of the VOCs is sent to the feed pump 4 before being sent to the injection tank 10 and the reprocessing process is repeated It is possible.

In this way, groundwater that has been degassed below the target concentration of VOCs is supplied to the injection well 10 and injected into the underground aquifer.

Here, the air stripper 1 will be described in more detail with reference to FIGS.

4, a front portion of the air stripper 1 is provided with an air outlet 1-10, a demister 1-9, a ground water inlet 1-1, (1-11), a sieve tray (1-2), an aeration tank (1-4), a manhole (1-12), a diffuser (1-8), an air inlet (1-7) A drop tube 1-3 and the like, and a discharge vessel 1-5 is located at the rear of the vessel 1 and an underground water discharge port 1-6 and a drain 1-13 are formed.

And, the illustrated air stripper 1 shows that the sieve tray 1-2 consists of three rows and six columns.

Therefore, the groundwater is supplied to the groundwater inflow port 1-1 and is thirdly degassed while flowing along the sieve tray 1-2. 1-3).

The groundwater flowing through the bottom end (6th stage) of the sieve tray 1-2 flows along the drop tube 1-3 and is supplied to the bottom of the aeration tank 1-5, The air is supplied to the outside of the air stripper 1 through the ground water outlet 1-6 after it is aerated by the air supplied through the air diffusing pipe 1-8 and is fourthly degassed.

In addition, the air supplied to the air stripper 1 is supplied through the air inlet 1-7, passes through the air diffuser 1-8, passes through numerous holes (holes) formed in the sieve tray 1-2, Gradually moving up and volatilizing the VOCs.

The air passing through the sieve trays 1-2 passes through the demisters 1-9 to remove moisture and is supplied to the air filter 2 through the air exhaust ports 1-10 And VOCs are removed and purified by passing through activated carbon.

Particularly, the air inlet 1-7 is installed in a U-shape higher than the water surface of the aeration tank 1-4 to prevent the groundwater from flowing backward to the ring blower 3.

In addition, three work windows 1-11 are installed in accordance with the number of heat of the sieve tray 1-2, and the maintenance (disassembly, cleaning) of the drop tube 1-3 located in the sieve tray 1-2 , Assembly).

5 shows details of the diffuser 1-8 installed in the aeration tank 1-4. The groundwater supplied through the drop tube 1-3 is discharged from the bottom of the aeration tank 1-4 1-5), and is aerated and degassed by the air supplied through the air diffuser 1-8.

At this time, the air diffusers 1-8 set the direction of the flow of the treated water in consideration of the route of the ground water reaching the discharge tank 1-5, and it is preferable to arrange three columns.

In particular, it is preferable that the size of the air vent hole of the air diffuser 1-8 is 3/16 inch (about 5 mm) so that the air supply efficiency and the size of the air bubble are suitable for the degassing process.

The outlet tank 1-5 is composed of three chambers by two diaphragms. In the aeration tank 1-4, the first diaphragm passes over the diaphragm when the groundwater passes, and the second diaphragm passes downward This is because the water head up to the ground water discharge port (1-6) acts as pressure, and even if the air in the aeration tank (1-4) is pressurized, the sipe tray (1-2) Direction to flow.

On the other hand, Fig. 6 shows the air filter in detail. The air filter 2 is composed of two upper and lower compartments inside.

At this time, the lower compartment is connected to the cleaning port (2-5) and is a space in which contaminated air of VOCs introduced into the air inlet (2-1) flows into the upper compartment so as to be equally distributed and transmitted. It is a space for cleaning (removing) some dropped activated carbon.

The upper compartment is connected to the manhole (2-4), and is composed of a space and a free space for storing the activated carbon.

The space of the activated charcoal is required to be one to three times the amount of air permeated per second. When the height of the activated carbon is increased, the permeation pressure of the air is generated. If the cross-sectional area is small, the permeation speed of the air is increased, The activated carbon must be properly designed because it is scattered.

In addition, the clearance space of the upper compartment allows the activated carbon to be evenly dispersed and introduced into the air outlet (2-3) when the air is permeated.

7 is a view showing an air feeder utilizing a feed pump.

According to Fig. 7, the supply of air utilizes the second jet nozzle 4-1. The second jet nozzle 4-1 is connected to the nozzle 4-a, the suction chamber 4-b, and the diffuser 4-c). A negative pressure generated when a high-pressure fluid is injected has a function of sucking a low-pressure fluid and a function of providing an environment in which VOCs are volatilized in sucked air.

It is preferable that the second jet nozzles 4-1 are arranged in a total of six for each location of the groundwater inflow port 1-1 of the air stripper 1. The amount of ground water injected through the six second jet nozzles 4-1 is 15 to 20 ton / hr, and the additional power required for injection corresponds to a fair increase amount of about 4 to 7 m in the feed pump 4, Level.

The ground water injected through the second jet nozzle 4-1 is supplied to the uppermost sheave tray 1-2 of the air stripper 1 and the air sucked through the second jet nozzle 4-1 After degassing the VOCs, moisture is removed through a demister (1-9) located at the top of the air stripper (1) and then introduced into the air filter (2).

The air introduced into the air filter 2 contains VOCs and adsorbed on the activated carbon of the air filter 2. [

8 is a detailed view of the gas-liquid separator.

The gas-liquid separator 5 includes a first jet nozzle 5-1, a distributor 5-3, a check valve 5-5, an underground water outlet 5-4, a demister 5-6 , An air outlet (5-7), and a drain (5-8).

At this time, the first jet nozzle 5-1 performs the same function as the second jet nozzle 4-1 described above. The distributor 5-3 divides the first jet nozzle 5-1 into a maximum of five .

Thus, the amount of the contaminated ground water flowing into each first jet nozzle 5-1 is about 1 to 3 ton / hr in the case of the underwater pump of 1 hp capacity, which is sent from each pumping cell 9.

The ground water and the air supplied to the gas-liquid separator 5 by the first jet nozzle 5-1 are supplied to the inside through the check valve 5-5 and the water level in the gas-liquid separator 5 is maintained at a constant level The injected air maintains sufficient contact time with the groundwater while floating up to the water surface, and the VOCs in the groundwater are deaerated into the air.

In addition, the groundwater and the air containing VOCs are separated from the gas-liquid separator 5, and the groundwater is sent to the storage tank 8 by gravity through the groundwater outlet 5-4, The moisture is removed while passing through the demisters (5-6) and is sent to the air filter (2).

In addition, the air introduced into the air filter 2 contains VOCs, and adsorbed on the activated carbon of the air filter 2.

In addition, the backflow prevention device 5-5 prevents the groundwater in the gas-liquid separator from flowing back into the pumping cell 9 when the underwater pump 6 in the pumping cell 9 stops operating, .

Also, the groundwater discharge port 5-4 is attached at a predetermined height so that the groundwater level in the gas-liquid separator 5 can be kept constant.

9 is a block diagram showing an example of installation of an underground water purification system.

9, the system according to the present invention represents a groundwater purification system, a pumping cell 9, a pumping cell 10 and a source of pollution.

The pumping cell is located in the interior of the source or downstream of the groundwater flow, and the pumping cell 10 is located upstream of the groundwater flow.

Injection ponds should take into account the location, location and pumping water volume in consideration of the capture interval to prevent the spread of groundwater contamination and the quantity required to purify the groundwater.

The water treatment capacity of the groundwater purification system should be designed to meet the daily water discharge and daily operation time required to prevent and purify the contamination of groundwater, and to estimate the water treatment capacity per hour.

The injection wells (10) are located upstream of the groundwater flow, and the number of batches should be calculated considering the amount of water injectable per hour, the treatment capacity of the water treatment facility, and the capacity of the storage reservoir (8) of deaerated groundwater.

Groundwater to be injected into the injection well (10) should be thoroughly degassed to meet the groundwater purification standard (water quality standard for living water) and then injected after confirming that it meets water quality standards.

The contaminated groundwater purification treatment method using the system according to the present invention having such a device configuration is the same as the flow chart of FIG.

That is, a pumping cell is provided on the downstream side of the contamination source, and a step (S1) of installing the infusion cell on the upstream side of the contamination source.

Then, the contaminated ground water is subjected to primary degassing (S2) with the gas-liquid separator through the pumped water and the pumped water.

Thus, when the primary degassing is completed, the step S3 of storing the primary degassed groundwater is performed.

Then, the stored groundwater is sent to the air stripper by the feed pump and secondly deaerated through the second jet nozzle (S4).

Next, a step (S5) is carried out to perform sequential degassing through degassing and aeration in a sieve tray of an air stripper.

In this way, the contaminated air generated during the degassing is collected in the air filter, and the purifying process (S6) is performed.

At this time, in order to further increase the degassing efficiency, steps S4-S6 may be repeatedly performed, which is a reprocessing step (S7).

Thereafter, the purified groundwater is supplied to the injection well and injected into the upstream region of the pollution source (S8). The step S9 is repeated until the pollution source is completely cleaned, so that the groundwater purification can be completed do.

As a result of confirming the purifying ability according to the present invention as described above, it was confirmed that the removal efficiency was excellent in the case of using the acid furnace as shown in Table 1, and it was confirmed that the deaeration efficiency was increased by using the jet nozzle.

The test examples in Table 1 show the removal efficiency of pollutants when treating groundwater contaminated with TCE by using only a sieve tray air stripper (1). The analysis time is 5 times in total, The analysis item is TCE.

The first, second and third stages of the analysis are performed before the diffuser (1-8) is mounted on the lower aeration tank of the air stripper (1), that is, the TCE removal efficiency Respectively.

The fourth and fifth analysis times show the efficiency of synthesis by mounting the diffuser (1-8) in the lower aeration tank of the air stripper (1), that is, by the six-stage sheave tray and diffuser (1-8).

In the second analysis, it was estimated that the effect of temperature during degassing was large due to the inability to prepare for the cold of winter, so it was not considered in the analysis of TCE removal efficiency.

The TCE removal efficiency was 86.8% in the case of the treatment with only the sieve tray (1-2), that is, the one and three times water analysis.

Therefore, assuming that the TCE removal efficiency of the sieve tray (1-2) is 86.8% and the synthesis efficiency is 96%, the removal efficiency of only the acid traps (1-8) is estimated to be 70%.

1: Air stripper 2: Air filter
3: Ring blower 4: Feed pump
5: gas-liquid separator 6: submerged pump
7: Control panel 8: Storage tank
9: pumping water 10:

Claims (1)

A water pump (9) installed in a groundwater contaminated area and including an underwater pump (6) capable of collecting groundwater; A gas-liquid separator (5) connected to the pumping cell (9) and performing primary degassing while separating the collected groundwater by gas-liquid separation; A reservoir 8 connected to the gas-liquid separator 5 to store only the separated liquid; An air stripper (1) through which liquid stored through a feed pump (4) provided at a discharge end of the reservoir (8) is supplied; An infusion hopper (10) for returning groundwater, which is finally deaerated liquid through the air stripper (1), to the aquifer; And an air filter (2) for trapping and purifying the separated gas by connecting the upper end of the gas-liquid separator (5) and the upper end of the air stripper (1) The first air nozzle 5-1 is further provided with an air suction / recognition first jet nozzle 5-1; A second jet nozzle 4-1 having the same shape as that of the first jet nozzle 5-1 is further provided at the inlet end of the air stripper 1; A ring blower 3 is further provided at the lower part of the air stripper 1 to supply air from the lower side to the upper side and air stripping is performed using a jet nozzle for deaerating the remaining contaminants in the groundwater, ≪ RTI ID = 0.0 > VOCs < / RTI > contaminated groundwater purification system using apparatus;
The air stripper 1 further includes a sieve tray 1-2 composed of three columns and six stages, and the groundwater is supplied to the groundwater inlet 1-1 and flows along the sieve tray 1-2 The movement from the upper sieve tray 1-2 to the lower sieve tray 1-2 is made through the drop tube 1-3 and the lower sieve tray 1-2 is de- The groundwater flows along the drop tube 1-3 and is supplied to the bottom of the aeration tank 1-5 and then flows to the upper end of the discharge tank 1-5. And the air that has passed through all of the sieve trays 1-2 is sent to a demister (not shown) through the ground water outlet 1-6, 1-9), and moisture is removed. The air is passed through the air outlet (1-10) and supplied to the air filter (2). VOCs are removed and cleaned ≪ / RTI >
Air supplied to the air stripper 1 is supplied through an air inlet 1-7 and air passing through the air stiffener 1 passes through the air diffuser 1-8 to a plurality of The air inlet 1 - 7 is formed in the aeration tank 1-4 so as to have a U-shape to prevent the groundwater from flowing back to the ring blower 3, Higher than water;
A number of working windows 1-11 are provided corresponding to the number of heat of the sheave tray 1-2;
The air diffusers 1-8 are arranged in three rows in the flow direction of the treated water in consideration of the route in which the ground water reaches the discharge tank 1-5 and the air vent hole size of the diffuser 1-8 is 3 / 16 inch, the outlet tank 1-5 is composed of three chambers by two diaphragms, the first diaphragm being configured to overflow the diaphragm when the groundwater passes through the aeration tank 1-4, The second diaphragm is configured to pass downward so that the water head up to the ground water outlet (1-6) is acted upon by pressure so that the air in the aeration tank (1-4) is not released through the ground water outlet (1-6) So as to flow in the direction of the sheave tray 1-2;
The air filter 2 is composed of two compartments in the upper and lower compartments. The lower compartment is a space through which the contaminated air of VOCs introduced into the air inlet 2-1 is dispersed equally in the upper compartment, Is connected to the cleaning port (2-5) and is configured to clean some dropped activated carbon; Wherein the upper compartment is composed of a space capable of storing activated carbon and a clearance space, and is connected to the manhole (2-4), wherein the VOCs contaminated groundwater purification system using the air striping apparatus using the jet nozzle.

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