KR100552349B1 - Framework type biopile for the remediation of oil-contaminated soil - Google Patents

Abstract

The present invention relates to a prefabricated biopile for restoring oil-contaminated soil, and more particularly, to a prefabricated biopile for restoring oil-contaminated soil, which can be produced in various forms prefabricated using plastic bumps in a short time in a variety of contaminated soils. It is about.

The prefabricated biopile for restoring the oil-contaminated soil of the present invention includes a plastic bump made to be used as a road partition or a barrier; A film supported on the plastic sheet and serving as a cover; A water supply device for supplying water to the biopile; The moisture is supplied to the contaminated soil containing the microbial agent, a mixed layer of gravel and coarse sand provided to prevent the clogging phenomenon of drainage under the contaminated soil; An order membrane provided under the mixed layer of the gravel and coarse sand to prevent the leachate from flowing out; And it is characterized in that it comprises a sand provided to be inclined at a predetermined angle in the direction of the leachate storage tank in order to smooth the drainage to the lower portion of the order film.

Therefore, the prefabricated biopile for restoring the oil-contaminated soil of the present invention can be easily connected to a few simple peripherals of contaminated soils of various volumes by using a plastic bumper manufactured to be used as a road partition or a barrier, in a short time in the field. There is an advantage that can be manufactured in various forms as a prefabricated, it is easy to move and install because it is a prefabricated, there is an effect that can reuse the plastic bum after restoration.

Bio piles, prefabricated plastics, oil pollution.

Description

Framework type biopile for the remediation of oil-contaminated soil}             

1 is a cross-sectional view of the prefabricated biopile for oil pollution soil restoration according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: plastic pan 2: film

3: moisture supply device 4: mixed layer

5: order curtain 6: sand layer

7: air supply pipe 8: discharge pipe

9: leachate storage tank 10: exhaust pipe

The present invention relates to a prefabricated biopile for restoring oil-contaminated soil, and more particularly, to a prefabricated biopile for restoring oil-contaminated soil, which can be produced in various forms prefabricated using plastic bumps in a short time in a variety of contaminated soils. It is about.

The plastic berm is made of a plastic material of any shape and may be used as a central separator of a highway.

Conventional techniques for the purification of contaminated soils include land farming, bioventing, oil vapor extraction, biological growth, and vacuum-enhanced free product recovery. ), A bioreactor, a bioopile, and the like. Cultivation is a method of removing contaminants by digging up contaminated soil, spreading it over large sites, injecting moisture and nutrients, and periodically mixing the soil to promote biodegradation. Bioventing is a method of injecting air and nutrients into a contaminated site to promote the activity of aerobic microorganisms in soil to decompose contaminants. In addition, the SVE method utilizes the volatility of contaminants, and installs pipes in contaminated soil and extracts the contaminants by forced vacuum suction. Bioaugmentation is a method in which microbiological purification takes place by introducing microorganisms that have been cultured externally when oil degradation microorganisms do not live in contaminated soil. Vacuum injection free contaminant recovery is a technology that extracts the waste gas from the soil by pressure gradient by connecting the air intake pipe in the soil to create a vacuum. Biological reactors are used to purify contaminated soils after they have been extracted to the ground and are particularly suitable for the treatment of groundwater, wastewater and waste gases. Excavated contaminated soil is mixed with water with appropriate additives and introduced into the reactor and stirred to activate microorganisms to promote oil degradation. When the area of the biopile used as a pollutant treatment plant is small, the polluted soil is excavated and treated in the ground to be treated by injecting nutrients and microorganisms through a soil purification device that can be injected with air.

However, the conventional methods described above have various problems, respectively. For example, the tillage method requires a large site and causes air pollution when the pollutants are volatile. The law and the SVE method are not easy to control the operation for the optimum conditions, there is a disadvantage that the operation instability occurs depending on the soil conditions and the long-term operation is low because the treatment efficiency is low. Therefore, most of the soils contaminated with oil and volatile organic compounds are classified as waste and are processed by expensive landfill methods.

According to Republic of Korea Utility Model No.223982, water is continuously sprayed on contaminated soil, and the oil is collected into a well-determined catchment well, pumped with a recovery pump, transferred to a flow control tank, and separated from oil-water separation tank. Through the chemical treatment tank and ozone oxidizer sequentially, the physical, chemical and biological treatment can be performed, and the purified water can be recycled and recycled. Disclosed is a technique for soil contamination purification equipment that enables the restoration of contaminated areas to quickly and completely cleaned soil.

Looking at the Republic of Korea Patent No. 301734, a reaction vessel for loading contaminated soil is provided, a plurality of nozzles are provided with a plurality of injection pipes to supply water and nutrients to the upper portion of the reaction vessel, the lower portion of the reaction vessel A vacuum suction tube and a drainage hole having a plurality of holes or slots are installed for air intake, and a water tank storing water and nutrients is connected to the spray tube of the reactor through a centrifugal pump, and the vacuum suction tube of the reactor is placed in soil. Vacuum pump for forced vacuum suction of gas is connected, and in addition, vacuum for purifying soil contaminated with oil and volatile organic compounds composed of gas-liquid separation tank, suction control valve, adsorption tower and control panel A technique for inhalation bioreactors is disclosed.

However, the prior art described by the above example is a complex component, it is inconvenient in the process of assembling and carrying a lot of complex equipment to apply in the soil pollution site, it is difficult to respond appropriately and quickly in the field There is a limit.

In addition, the restoration technology using the bio file up to now is inconvenient to move, and the contaminated soil volume has to be applied according to the size of the predetermined bio file. In this case, there is a limit to the proper and rapid response in the field when a large amount of oil-contaminated soil occurs.

Therefore, the present invention is to solve the problems of the prior art as described above, by applying a small plastic bum to the prefabricated biopile to solve the inconvenience of the conventional biopile has a convenient point of movement and installation It is an object of the present invention to provide a field applicable prefabricated biopile characterized by.

The object of the present invention is a plastic bump made to be utilized as a road partition or a barrier; A film supported on the plastic sheet and serving as a cover; A water supply device for supplying water to the biopile; The moisture is supplied to the contaminated soil containing the microbial agent, a mixed layer of gravel and coarse sand provided to prevent the clogging phenomenon of drainage under the contaminated soil; An order membrane provided under the mixed layer of the gravel and coarse sand to prevent the leachate from flowing out; And it is achieved by the prefabricated bio-pile for restoring the oil-contaminated soil consisting of the sand provided inclined at a predetermined angle in the direction of the leachate storage tank in order to facilitate the drainage to the lower portion of the water curtain.

Details of the above object and technical configuration of the present invention and the effects thereof according to the present invention will be more clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

Figure 1 shows a cross-sectional view of the prefabricated biopile for oil pollution soil restoration according to the present invention. The prefabricated biopile is largely composed of a biopile body and a biopile peripheral device.

The components of the biopile body consist of a plastic sheet (1), a water supply device (3), a water film (5), a mixed layer of sand and gravel (4) and a microbial agent. In addition, the bio pile peripheral device is composed of a water supply tank, a supply pump, a leachate storage tank (9).

The plastic bump (1) has a predetermined shape for easy movement and installation and easy on-site application, and is manufactured to be used as a road partition or a barrier, and the material is plastic, preferably 90 cm high and 120 cm It has a shape having a length of.

Moisture is stored in the water supply tank and supplied into the biopile through the feed pump. The moisture supply device 3 is provided on the upper part of the biopile body and serves to sprinkle the inside of the biopile body by receiving water from a supply pump for microbial growth.

Moisture supplied in the biopile is sprinkled for the growth of microorganisms contained in the contaminated soil and flows down the body of the biopile.

In order to prevent clogging of the drainage, the biopile body is placed with a mixed layer 4 of gravel and sand of a predetermined size in a predetermined thickness. Install).

Hereinafter, the structure of the biopile body lower portion will be described in detail. Sand is inclined at a predetermined angle toward the leachate reservoir 9 in order to facilitate drainage. The inclined sand upper portion is provided with a water-repellent film (5) to prevent the leachate outflow. In order to prevent the clogging phenomenon of the drainage, the mixed layer 4 is formed on the top of the order layer 5 with gravel and coarse sand. The preferred size of the gravel is 1 to 3 cm.

The side of the mixed layer (4) made of gravel and coarse sand is to supply air evenly to all parts of the biopile through the air supply pipe (7) using an air compressor for the growth of microorganisms and biodegradation of various oil components. do. By supplying air as described above, the discharge of the leachate is more smoothly.

The lower side of the biopile body is formed with a discharge pipe 8 for sending the leachate to the leachate storage tank (9).

The bio pile body is provided with a film 2 supported by the plastic pan 1 and serves as a cover to maintain airtightness so that the exhaust gas generated inside the bio pile is not discharged to the upper portion of the bio pile body. . An upper end side of the biopile is provided with an exhaust pipe 10 for collecting and discharging gas generated therein. The exhaust pipe 10 may be connected to a purification device to purify the exhaust gas.

In addition, in the use of microorganisms, most of the contaminated soil is not contaminated by one type of oil, but by various types of oils, so that the ability to selectively decompose with high efficiency for each oil is increased. The microorganisms with which they are used must be used in combination. As an example of the microbial agent, a powder mixed with Acinetobacter junii / jonsonii A-1, Acinetobacter baumanii / calcoaceticus N-1, Pseudomonas aerognosa NW-6 and Acinetobacter lwoffii NB-7 is used.

Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

Therefore, the prefabricated biopile for restoring the oil-contaminated soil of the present invention can be easily connected with a few simple peripherals of contaminated soils of various volumes by using a plastic bumper manufactured to be used as a road partition or a barrier, so that a short time in the field There is an advantage that can be manufactured in various forms as a prefabricated, it is easy to move and install because it is a prefabricated, there is an effect that can reuse the plastic bum after restoration.

Claims (6)

In the biopile for oil pollution soil restoration, Plastic rims manufactured to be used as road partitions or barriers; A film supported by the plastic frame and serving as a cover; A water supply device for supplying water to contaminated soil in a space consisting of the plastic frame and the film; Mixed layer of gravel and coarse sand provided under the contaminated soil to prevent clogging of the drainage; An air supply pipe provided at a side of the mixed layer and supplying air through an air compressor for growth of microorganisms and biodegradation of oil components; An order membrane provided under the mixed layer of gravel and coarse sand to prevent leachate from leaking out; And Sand layer provided to be inclined at a predetermined angle in the direction of the leachate storage tank in order to facilitate the drainage to the lower portion of the order film Prefabricated bio-file for oil pollution soil restoration, characterized in that comprises a. The method of claim 1, The water supply device is a prefabricated bio pile for oil pollution soil restoration, characterized in that for supplying the water stored in the water supply tank through the feed pump in the bio pile. delete The method of claim 1, Prefabricated bio-file for oil pollution soil restoration, characterized in that the lower side of the bio pile is provided with a discharge pipe for sending the leachate to the leachate storage tank. The method of claim 1, Prefabricated bio-file for oil pollution soil restoration, characterized in that the upper side of the bio pile is provided with an exhaust pipe to collect and discharge the gas generated therein. The method of claim 1, The microorganism, A prefabricated biofile for restoring oil-contaminated soils using a mixture of Acinetobacter junii / jonsonii A-1, Acinetobacter baumanii / calcoaceticus N-1, Pseudomonas aerognosa NW-6, and Acinetobacter lwoffii NB-7.

Images