KR101697522B1 - Structure and method for purificating groundwater contaminated by leachate from livestock burial area using phytobarrier - Google Patents

Abstract

The present invention relates to a facility for purifying contaminated soil in a burial site, including livestock and organic materials, by using a phyto-barrier in an environment-friendly manner. The facility for purifying contaminated soil in a burial site, including livestock and organic materials, by using a phyto-barrier in an environment-friendly manner, which purifies leachate leaked from the burial site by initial rain water, wherein the facility comprises: a burial site under which leachate flows as a undercurrent; and at least one phyto-barrier which is constructed in a direction in which the leachate is leaked, which removes contaminants from the leachate, and which discharges the leachate from which the contaminants have been removed. The phyto-barrier is configured such that soil and biochar are mixed together, plants having self-configurability adapted to move contaminants into an inside are planted, the biochar adsorbs the contaminants, and the plants move the contaminants, adsorbed by the biochar, into the inside.

Description

FIELD OF THE INVENTION The present invention relates to a method and apparatus for purifying groundwater contaminated soil, and more particularly, to a method for purifying groundwater contaminated soil from a livestock buried area using phytobarrier,

The present invention relates to an eco-friendly purification facility for buried soil contaminated soil containing livestock and organic matter using plant reaction walls. More particularly, the present invention relates to an environmentally friendly purification treatment facility and purification method for soil-contaminated soil containing livestock and organic matter using a plant reaction wall (phyto barrier) combining a permeable reactive barrier process and a phytoremediation process .

The risks that can occur in livestock littering are largely divided into outbreaks of disease viruses, groundwater and soil pollution caused by leachate organic substances, and the health hazards of various pathogenic microorganisms that may be present in leachate. Since the buried body itself is a perishable organic material containing about 70% of water, leachate may be generated as the corruption of the livestock body progresses.

This risk is not only economical loss such as crop damage but also it is a risk factor to humans. Therefore, it is very effective to prevent the leachate from leaking out earlier. Therefore, measures to minimize the damage caused by leaking leachate need.

As a method to prevent the initial outflow of leachate due to groundwater pollution, there is a well known method of installing a water wall. However, the installation of the water wall has a disadvantage that not only the expensive construction cost is large, but also it is impossible to guarantee that the water level becomes perfect even after the installation is completed, and the effect of the pollutant movement below the installation depth is small. Many researches have been carried out in order to overcome the disadvantages of these existing car lumber materials and to consider economical efficiency. Particularly, the order and purification method using the permeable reactive barrier (PRB) is attracting attention due to its advantages such as low cost and convenience of construction It is a trend.

If you want to purify contaminated soil using civil engineering technology, it usually takes between $ 50 and $ 500 to process one ton of soil, and if you use special techniques such as vacuum cleaning technology, do.

Phytoremed contaminated soil restoration technology, so-called phytoremediation, uses plants to remove, stabilize and detoxify harmful pollutants from the soil, and has the advantage of minimizing environmental disturbances in the process of inexpensive treatment and purification have.

The definition of phytoremediation is based on the fact that the expression of the phytoremediation is somewhat different depending on the scholar, but the plant is used to purify soil, sediments and water polluted with various pollutants such as heavy metals and organic pollutants such as crude oil, solvent, and hydrocarbons As well.

The greatest advantage of the plant purification method is that the polluted soil has no secondary pollution compared with the existing physical and chemical methods, and is environmentally friendly and economically superior.

Recently, as the awareness of the seriousness of environmental problems has increased, the concept of minimizing adverse effects on the environment has been emphasized in all specialties of society and this perception is becoming a paradigm.

As an example of such a plant purification method, cadmium is absorbed into the body and removed by using a curled dock as disclosed in Korean Patent Laid-Open No. 10-2004-0029540, or it is disclosed in Korean Patent No. 10-0476113 Abutilon theophrasti as (China jute) or Aeschynomene indica (Aeschynomene indica ) to restore the contaminated soil, or the tail of a ladder rope ( Pteris vittata ) is known to restore the soil.

However, these treatment methods are still available only on surface soils, and no specific results have been reported on the pollutants present in the deep part. The burial of the animal carcass or the like is contaminated to the soil of the deep part due to the leachate thereof. In order to remove such a contamination source, special measures are required.

Korean Patent Publication No. 2004-0029540 Korean Patent No. 0476113 Korean Patent No. 1226103 Korea Patent No. 1085171 Korean Patent No. 1324274 Korea Patent Publication No. 2012-009683

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for removing pollutants such as livestock and organic matter using a plant reaction wall And an object of the present invention is to provide an environmentally friendly purification treatment facility and a purification method of buried soil contaminated soil.

In addition, according to one embodiment of the present invention, a plant reaction wall can be installed in a direction in which leachate that has been submerged in a buried land is drained to effectively reduce an initial pollutant load, The present invention provides an environmentally friendly purification treatment facility and a purification method for soil contaminated soil.

According to an embodiment of the present invention, the biochar (BC) of the plant reaction wall adsorbs contaminants of infiltration water discharged by the initial storm, and the contaminants adsorbed by the biochar It is an object of the present invention to provide an environmentally friendly purification treatment facility and purification method for contaminated soil containing livestock and organic matter using a plant reaction wall which can be used semi-permanently by moving the plant by planting planted reaction walls.

In addition, it is possible to use a plant reaction wall capable of producing a bio-car by harvesting and carbonizing a plant in which pollutants according to an embodiment of the present invention are transferred into the plant, and applying the produced bio-car to another polluted area for recycling An object of the present invention is to provide an environmentally friendly purification treatment facility and a purification method of soil contaminated soil containing livestock and organic matter.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

An object of the present invention is to provide a facility for purifying infiltration leachate discharged by an initial storm, comprising: an infiltration site in which leachate is submerged at a lower side; And at least one plant reaction wall which is installed in the direction of the leach water to remove contaminants from the leachate and discharges the leachate from which pollutants have been removed. And can be achieved as an environmentally friendly purification treatment facility containing buried soil.

In addition, the plant reaction wall is installed between the base arm and the ground, the bottom surface is spaced apart from the base arm by a specific distance, and the soil and the bio-tea are mixed.

In addition, the plant reaction wall is characterized in that a common plant having a mechanism capable of moving pollutants into the plant is planted.

In addition, the bio-car absorbs the pollutants, and the plant moves the pollutants adsorbed on the bio-car by self-constituting force.

The pollutants may be nitrogen, antibiotics or pathogens.

In addition, the plant reaction wall may further include a non-reactive filter medium for controlling the permeability, for example, a geolite.

In addition, the plant having the pollutants transferred therein may be harvested and then carbonized to produce and recycle the bio-tea.

As another category, an object of the present invention is to provide a method for purifying infiltration leachate discharged by an initial storm, comprising the steps of: burrowing a livestock carcass in a burrow; The leached water is generated in the buried carcass and is submerged on the lower side of the buried bed; The leachate is drained by the initial storm; And removing the pollutants of the leachate by a plant reaction wall installed in the leachate outflow direction. The method of claim 1, .

In addition, the step of removing the pollutants may include: a step in which the bio-catalyst constituting the plant reaction wall adsorbs contaminants of the leachate; And moving the pollutant adsorbed on the bio-car by the self-constituting force of plants planted in the plant reaction wall.

The method may further include a step of carbonizing the plant after the pollutant is transferred to produce the bio-tea, and recycling the bio-tea.

According to an embodiment of the present invention, a plant reaction wall is combined with a permeable reaction wall method and a plant purification method in a direction in which leachate that has been submerged in a buried land is applied to effectively reduce an initial pollutant load.

According to an embodiment of the present invention, the bio-car of the plant reaction wall adsorbs the pollutant of the infiltration water discharged by the initial storm, and the pollutant adsorbed on the bio-car is introduced into the plant reaction wall, And is moved to the inside by phytoremediation, so that it can be used semi-permanently.

In addition, it is an advantage of the present invention that a plant in which pollutants according to an embodiment of the present invention are moved to the inside by self-constituting force is harvested and carbonized to produce a bio-tea, and the produced bio-car is applied to another polluted area for recycling have.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
FIG. 1 is a cross-sectional view showing the flow of initial leachate outflow in an environmentally friendly purification facility for buried soil contaminated with livestock and organic matter using a plant reaction wall according to an embodiment of the present invention;
FIG. 2A is a sectional view of a drilling hole according to an embodiment of the present invention,
FIG. 2B and FIG. 2C are cross-sectional views of a drilling hole filled with soil mixed with bio-car according to an embodiment of the present invention;
FIG. 2d is a sectional view of a plant reaction wall in which vegetation water is planted according to an embodiment of the present invention;
FIGS. 3A through 3D illustrate an example of a plurality of plant reaction walls constructed in a single type, a wall type, a block type, and a grid type according to an embodiment of the present invention. FIG.
FIG. 4 is a flow chart of a purification method using an environmentally-friendly purification facility containing soil-contaminated soil containing livestock and organic matter using a plant reaction wall according to an embodiment of the present invention;
FIG. 5A is a cross-sectional view showing solid matter and leachate generated by burying a livestock carcass in buried land according to an embodiment of the present invention, FIG.
FIG. 5B is a cross-sectional view illustrating a state in which leachate flows out due to an initial storm according to an embodiment of the present invention. FIG.
FIG. 5c is a cross-sectional view showing a state where a bio-disc of a plant reaction wall adsorbs contaminants in leachate according to an embodiment of the present invention,
FIG. 5d is a cross-sectional view illustrating a state where contaminants adsorbed on a bio-car by plants planted on a plant reaction wall are moved into a plant according to an embodiment of the present invention;
FIG. 6A is a cross-sectional view of a plant reaction wall planted on a topsoil according to an embodiment of the present invention, FIG.
FIG. 6B is a sectional view of a plant reaction wall in which plants are planted at the lower end of a guard tube according to an embodiment of the present invention;
Figure 6c is a cross-sectional view of a plant reaction wall planted at the lower end of the guard tube longer than Figure 6b,
FIG. 7 is a schematic view showing a process of carbonizing a contaminated plant to produce a bio-tea according to an embodiment of the present invention, and recycling it to the plant reaction wall construction using the produced bio-car,
FIG. 8 shows data (top) obtained by measuring the degree of development of roots at 1.2 m and 1.5 m by inserting an endoscope camera into a root observation tube when planting poplar trees on a surface soil according to the experimental example of the present invention, When the roots of the trees were planted, data of the development of roots at 1.2m and 1.5m by inserting an endoscopic camera into the roots observation tube (data discontinuity), and when the root of the willow was planted at the bottom of the guard tube, Data of the development of roots at 1.2m and 1.5m by inserting an endoscopic camera (bottom)
Figs. 9 and 10 are photographs of plant reaction walls cut to confirm the root development of woody plants 2 years after planting,
Fig. 11 is a graph showing the distribution of poplar in the topsoil from April 2013 to September 2014, when the poplar was planted using a guard tube, and when the willow was planted using a guard tube, 1.5m) EC (μS / cm) change data,
FIG. 12 is a graph showing the distribution of poplar in the surface soil from April 2013 to September 2014, when the poplar was planted using a guard tube, and when the willow was planted using a guard tube, 1.5 m) TN (nitrogen concentration) (g / kg)
Fig. 13 is a graph showing the distribution of poplar in a surface soil from April 2013 to September 2014, when a poplar was planted using a guard tube, and when a willow was planted using a guard tube, 1.5 m) TP (phosphorus concentration) (g / kg).

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Also in the figures, the thickness of the components is exaggerated for an effective description of the technical content.

Embodiments described herein will be described with reference to cross-sectional views and / or plan views that are ideal illustrations of the present invention. In the drawings, the thicknesses of the films and regions are exaggerated for an effective description of the technical content. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are produced according to the manufacturing process. For example, the area shown at a right angle may be a curved surface or a shape having a predetermined curvature. Thus, the regions illustrated in the figures have attributes, and the shapes of the regions illustrated in the figures are intended to illustrate particular forms and are not intended to limit the scope of the invention. Although the terms first, second, etc. have been used in various embodiments of the present disclosure to describe various components, these components should not be limited by these terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprises" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

In describing the specific embodiments below, various characterizing features have been set forth in order to provide a more detailed description and understanding of the invention. However, it is to be appreciated that a reader having knowledge in this field may understand that the present invention can be used without any of these various characteristics. In some instances, it should be noted that portions of the invention that are not commonly known in the description of the invention and are not significantly related to the invention do not describe confusing reasons to explain the present invention.

Hereinafter, the structure, function, and purification method of the burnt-on-soil contaminated soil eco-friendly purification facility 100 including the livestock and organic materials using the plant reaction wall according to an embodiment of the present invention will be described. FIG. 1 is a cross-sectional view showing the flow of initial leachate outflow in an environmentally friendly purification facility 100 for soil-contaminated soil containing livestock and organic matter using a plant reaction wall according to an embodiment of the present invention.

The present invention relates to a facility for purifying submerged leachate 11 flowing out by an initial storm, and is characterized in that the submerged land 10 in which the leachate 11 is submerged at the lower side and the submerged land 10 in which the leachate 11 And at least one plant reaction wall 20 installed in the outflow direction to remove contaminants in the leachate 11.

The plant reaction wall 20 according to an embodiment of the present invention is installed between the base arm 2 and the ground and the bottom surface is positioned to be spaced apart from the base arm 2 by a specific distance. The plant reaction wall 20 is composed of a mixture of the soil 3 and the biochar 21 and is planted with a plant 22 having a self-constituting power capable of moving the pollutants into the interior .

Therefore, the biocide 21 of the plant reaction wall 20 adsorbs contaminants of the leached leachate 11, and the plant 22 planted in the plant reaction wall 20 is biocide 21 To move the contaminants that are adsorbed to the inside thereof.

These pollutants are nitrogen (N), antibiotic, pathogen, and the like. As will be described in detail later, the biocide 21 adsorbs nitrogen, antibiotics, pathogens and the like in the leachate 11, and adsorbs nitrogen, antibiotics, pathogens and the like adsorbed by the biocide 21 to planted woody plants (22) to be environmentally cleaned by the self-constituting force.

In addition, the plant reaction wall 20 according to an embodiment of the present invention may further include a geolite.

Then, the plant 22 in which the pollutants are transferred to the inside can be harvested and carbonized to produce and reuse the bio-car 21. In other words, the purification of the soil (3) is generally carried out by purging the contaminated soil (3) and purifying it by the soil washing method, the solidification / stabilization method, and the copper electrophoresis method. Not only is it costly, but it also has an element of soil dysfunction. However, the purification method using the plant reaction wall 20 according to an embodiment of the present invention can be said to be semi-permanent because the contaminants are moved into the plant 22 by the self-constituting force of the plant 22 simultaneously with the adsorption of the pollutants And only the woody plants 22 absorbing the pollutants are harvested and carbonized without removing the plant reaction walls 20 themselves, so that the biocides 21 can be recycled.

Referring to Fig. 1, an initial outflow flow and timing of the livestock burial leachate 11 will be described. The frequency and timing of foot-and-mouth disease outbreaks are most frequent between December and January, and the number of livestock landfill leachate (11) also increases with foot-and-mouth disease.

As shown in part (1) of FIG. 1, the livestock is buried between December and January. Through various monitoring experiments, the leachate (11) generated from the buried carcass (1) leaks, And is discharged by groundwater flow.

That is, as shown in the section (2) of FIG. 1, the leachate (11) leaks out due to the infiltration of the early storm of falling rain between February and March of the early spring, .

In the embodiment of the present invention, the main mechanism that the plant reaction wall 20 intends to achieve is the adsorption by the bio-tea 21 and the removal of pollutants by the plant purification method by the planted woody plants 22. [ That is, the target contaminant of the leachate 11 may be nitrogen and phosphorus, and trace contaminants such as antibiotics and disinfectants may also be targeted. The object to be removed in the present invention is to reduce the load of the initial underground runoff which can reach the surface water in the wet season. Therefore, the pollutants to be removed at this time are subject to the basal runoff. Groundwater below a certain depth is not subject to treatment because the flow is slow and the pollution level is low.

That is, the organic matter adsorbed and removed from the initial groundwater outflow is absorbed by the plant reaction wall 20, and is diluted in the year and flows downstream. However, since the load increase due to the pollutant reaching the surface water during the period other than the seawater is insignificant, Is not. Therefore, as described above, since the outflowed leachate 11 due to the initial storm is to be removed, the plurality of plant reaction walls 20 do not need to be installed close to the base arm 2, The plant reaction wall 20 is installed so as to be spaced apart from the base arm 2 by a specific distance so as to be brought into contact with a position where the main body 11 flows. Therefore, it is not necessary to apply the plant reaction wall 20 to the base arm 2, so that the construction cost and time can be reduced. That is, the plant reaction wall 20 according to an embodiment of the present invention is aimed at stabilizing pollutant outflow concentration through pollution degree of the soil 3 and initial outflow. It is reasonable to understand that stabilization refers to managing the risk rather than the concept of elimination.

As shown in part (3) of FIG. 1, the outflowed leachate 11 is purified by the plant reaction walls 20 in the form of a plant reaction wall group 30 in the outflow direction. That is, contaminants such as high concentration organic substances, antibiotics, trace organic substances, pathogenic bacteria, etc. in the leached leachate 11 pass through the plant reaction wall 20 along with the initial outflow, and these pollutants are introduced into the biocide 21 Adsorbed to reduce the concentration of pollutants, and the adsorbed pollutants are transferred to planted woody plants 22 through the plant purification process. Then, the leachate 11 from which contaminants have been removed by the plant reaction wall 20 is discharged to the river or the like as shown in the section ④ of FIG.

Hereinafter, a method of constructing an environmentally friendly purification treatment facility 100 for buried soil contaminated with livestock and organic materials using plant reaction walls according to an embodiment of the present invention will be described. First, groundwater is polluted by the leachate (11), and the landfill (10) having a high influence on the surface water quality is selected. (10), which has a high water quality load due to non-point source, a low stream / low water ratio stream, and a lot of buried water. The groundwater level is determined by using the observations and the usable data, the groundwater flow direction and flow rate are determined, and the depth of the base arm 2 is determined.

Based on this data, a plurality of plant reaction walls 20 are installed in the downstream direction of the buried pile 10 to select a point at which the pile wall is to be formed, and the base runout depth is determined. Then, the input amount of the bio-car 21 to be mixed into the soil of the plant reaction wall 20 is determined. This is a value in consideration of the amount of leachate generated in consideration of the amount of the buried carcass 1 and the area of the buried paper 10, The appropriate mixing ratio is determined by the experiment, and the dosage is determined not by the mixing ratio but by the total volume of the mixed soil.

Then, the plants planted in the plant reaction walls 20 are selected. Plants can consider both herbaceous and woody matter and induce the effect of annual removal of adsorbed and accumulated pollutants through rainfall.

Among the purification functions of plants, there are generally five known methods for removing contaminants.

First, phytodegration is a method in which organic contaminants absorbed into the plant 22 are decomposed by the physiological mechanism of the plant 22, and phytoextraction absorbs contaminants, Rhizodegration / phytostimulation is a method of isolating and removing contaminants from the soil and water environment by storing in the plant 22 tissue, wherein the rhizodegration / phytostimulation is carried out in the root region of the plant 22 and in the root region Phytostabilization is a method in which organic contaminants that are highly toxic by the action of roots and microorganisms in the rhizosphere of plant (22) are non-toxic substances And the pollutant absorbed by the plant (22) is contained in the inside of the plant It is a method of volatilization through the leaves through the stabilization process. In addition, there is a rhizofiltration method using the adsorption of plant roots.

A plant 22 applied to an embodiment of the present invention is a plant 22 that exhibits at least one or more of the above five functions with respect to the source. Examples are poplar and willow. These plants (22) are woody plants and have a characteristic of showing vigorous growth even under conditions of rapid growth and adverse growth, and thus they are widely used in plant reaction methods. A disadvantage of the botanical purification method is that the amount of pollutant removal is not so high because the biomass of the hyperaccumulator is not large. In order to overcome such disadvantages, it is a current trend to apply timber plants such as poplar and willow (22), which are fast growing and have high biomass, to the site for restoration of soil pollution. In addition, these woody plants (22) are also effective in removing plumes from the soil at high elevation and can reduce the extent of contamination spread to the soil by removing pollution sources. These woody plants (22) have high biomass production capacity for the production of new and renewable energy as well as the application of plant purification technology.

When a plant reaction wall 20 is to be constructed and a mixed amount of the bio-tea 21 and a planted plant 22 are selected, a plurality of plant reaction walls 20 are installed. As for the construction method, unlike the existing water permeable reaction walls (PRB), it is possible to maximize the convenience of field application by installing virtual walls through drilling instead of a cartridge type.

2A shows a cross-sectional view of a drilling hole 5 according to an embodiment of the present invention. As shown in Fig. 2A, a perforation 5 is formed by using a drill-type drilling means 4 or the like, and as shown in Figs. 2B and 2C, a mixture of the bio- The material is filled. That is, by mixing the bio-tea 21 and the soil to create an environment in which the plant 22 can grow, and by arranging the woody plant 22 along the supply line as shown in FIG. 2d So that the pollutant adsorbed on the bio-tea 21 can be transferred to the woody plant 22. [

The form of forming the plant reaction wall group 30 by forming a plurality of plant reaction walls 20 may be various forms. As shown in FIG. 3A, the plant reaction walls 20 may be of a single type separated from each other, and the plant reaction walls 20 may extend in the lateral direction May be constructed as a wall type having a plurality of connected columns or may be constructed as a block type as shown in FIG. 3C, a grid type as shown in FIG. 3D, or the like .

Hereinafter, a purification method using an environmentally-friendly purification treatment facility 100 with soil-contaminated soil containing livestock and organic matter using the plant reaction wall 20 according to an embodiment of the present invention will be described. FIG. 4 is a flowchart illustrating a purification method using an environmentally-friendly purification treatment facility 100 with soil-contaminated soil containing livestock and organic matter using the plant reaction wall 20 according to an embodiment of the present invention.

The livestock carcass 1 is buried in the buried ground 10 due to the occurrence of foot-and-mouth disease and AI in winter and about 30% of the carcass 1 buried at the time of burial remains as a solid matter and about 70% (11). The outflow process is performed within about 3 months, and the leached water 11 leaks under the buried paper 10 (S2). 5A is a cross-sectional view showing the solid material and the leachate 11 generated by embedding the livestock body 1 in the land burial 10 according to an embodiment of the present invention.

The leachate 11 which has been submerged in the buried pile 10 is discharged with a high pollutant load due to the initial rainfall (S3). FIG. 5B is a cross-sectional view illustrating a state in which leachate 11 flows out due to an initial storm according to an embodiment of the present invention. As described above, the outflowed leachate 11 passes through the plant reaction wall 20 according to an embodiment of the present invention, and the initial pollutant load is reduced.

That is, nitrogen (N), antibiotic, pathogen, etc., which are pollutants, are adsorbed and removed through the plant reaction wall 20 (S4). 5C is a sectional view showing a state in which the bio-disc 21 of the plant reaction wall 20 adsorbs pollutants in the leachate 11 according to an embodiment of the present invention. The adsorbed pollutants are nitrogen (N), antibiotic (pollutant) existing in the plant reaction wall 20 by the woody plant 22 planted along the construction line where the bio car 21 and the soil are mixed, Pathogen and the like are moved to the inside by the self constituting force of the plant 22 to induce them to be environmentally cleaned (S5). 5D is a cross-sectional view of a state in which contaminants adsorbed to the biocide 21 by the plant 22 planted in the plant reaction wall 20 are moved into the plant 22 according to an embodiment of the present invention. It is.

In addition, the plant reaction wall 20 according to an embodiment of the present invention may further include a guard tube 23 installed therein. That is, when plants are planted on the topsoil of the plant reaction wall, the roots of the plant 22 are not brought into contact with the pollutants adsorbed on the bio-disc 21, so that the pollutants can not be transferred to the inside of the plant 22.

For this purpose, in order to efficiently move the contaminants absorbed in the biocide 21 to the inside without contacting the plant reaction wall 20 with the plant stem, in one embodiment of the present invention, the guard tube 23 ).

6a is a cross-sectional view of a plant reaction wall planted with topsoil according to an embodiment of the present invention. 6B is a cross-sectional view of a plant reaction wall in which plants are planted at the lower end of a guard tube according to an embodiment of the present invention. FIG. 6C is a cross-sectional view of a plant reaction wall in which plants are planted at the lower end of the guard tube longer than FIG. 6B.

6 (b) and 6 (c), the plant 22 is placed in a desired depth of the plant reaction wall 20 with the root of the plant 22 and the stem 22 of the plant 22, It can be understood that the plant 22 can be planted so that it does not come into contact with the plant reaction walls 20.

In addition, soil remediation is generally carried out by reclaiming contaminated soil, cleansing it by soil washing, solidification / stabilization, and copper electrophoresis. However, the above methods are costly in terms of economy, It has elements of function inhibition.

However, the plant reaction wall method according to an embodiment of the present invention is semi-permanent because the pollutant moves to the inside of the plant 22 due to the self-constituting force of the plant 22 at the same time as the pollutant is adsorbed. Accordingly, the woody plant 22 in which the pollution factor is absorbed can be harvested and recycled without removing the entire plant reaction wall 20 (S6).

FIG. 7 is a view illustrating a method of producing a bio-tea 21 by carbonizing a polluted plant 22 according to an embodiment of the present invention and recycling it to the plant reaction wall 20 using the produced bio-tea 21 Fig. As shown in FIG. 7, the contaminated plant 22 is carbonized after harvesting to produce the bio-tea 21, and the produced bio-car 21 is applied to the other polluted area by the above-described method.

<Experimental data>

Hereinafter, experimental data of the plant reaction wall according to an embodiment of the present invention will be described. The experimental data on the removal efficiency of nitrogen and phosphorus from plant reaction walls mixed with BC in soil are explained.

The soil inside the buried land is collected by a large amount of organic pollutants generated from the decomposition of the livestock. When the buried soil is excavated, the soil is reused or the plant is used for purification, It is highly likely that a large amount of organic pollutants will flow into the groundwater through the effluent to cause secondary pollution. Therefore, the experiment was conducted to investigate the removal rates of ammonia nitrogen and phosphorus released to the external environment through rainfall and so on, by treating BC with ammonia nitrogen and phosphorus adsorption.

Soil used in this study was soil contaminated with high concentration of ammonia nitrogen (10,000 mg / L) and phosphorus (5,330 mg / L). In this soil, rice hull BC and ginkgo BC were treated with 0, 1, 2 , And 5% (w / w), respectively. In this experiment, distilled water was used as the leach solution, and the pH was adjusted to 5, 7, and 9 to observe the difference by pH. The leachate was continuously leached for 200 minutes at a flow rate of 2 mL / min and leachate was collected every 20 minutes for analysis.

Table 1 below shows the results of synthesizing the respective experimental results. Overall, ginkgo BC showed higher ammonia nitrogen and phosphorus removal than rice bran BC. However, 1% Ginkgo BC treatment showed lower efficiency in leaching solutions with pH 5 and 9.

process pH 5 pH 7 pH 9 NH ₄ -N
Removal rate (%) P
Removal rate (%) NH ₄ -N
Removal rate (%) P
Removal rate (%) NH ₄ -N
Removal rate (%) P
Removal rate (%) Rice bran 1% 13.1 15.0 10.0 0.9 27.5 14.5 Rice bran 2% 12.3 14.5 18.1 10.4 25.1 17.0 Rice bran 5% 19.4 12.8 37.4 25.9 32.6 22.5 Ginkgo BC 1% -16.3 4.8 28.1 19.0 10.6 11.2 Ginkgo BC 2% 34.5 31.3 26.1 24.8 32.3 27.5 Ginkgo BC 5% 31.4 37.9 40.6 39.5 35.1 36.6

The removal efficiency of ammonia nitrogen and phosphorus according to the pH of the leachate showed the highest removal efficiency at pH 7, and the treatment with pH 5 showed the lowest removal rate. The pH of the soil used in this experiment was 6.97, which was lower than that of soils contaminated with buried soil containing mainly alkaline livestock and organic materials.

Therefore, the effect is lower than other pH at pH 5, which is considered to be the main cause of leachate. However, considering the pH of contaminated soil containing livestock and organic matter It is expected to be higher than the removal rate.

Therefore, ginkgo bacterium BC effectively adsorbs ammonia nitrogen and phosphorus in the soil, and is expected to have a great effect on the reduction of these concentrations.

Studies have shown that BC has an excellent effect on the removal of ammonia nitrogen and phosphorus, which are contaminated with buried soil contaminated with livestock and organic matter. BC Ginkgo BC was more effective than BC. However, unlike commercial rice bran BC, Ginkgo BC is not commercialized, and it is much more economical to use rice bran BC as it takes time and cost to supply the desired amount at the desired time of supply.

In the following, the result of observing the growth of the rhizosphere by depth using the guard tube and the result of measuring the nitrogen removal rate by the depth of phosphorus are explained. As mentioned above, in order to demonstrate the ability to purify the soil contaminated with the soil, which is intended for the plants planted in the ground using the guard tube, it is necessary that the root growth is well developed in the target soil and the growth is normally performed.

In the case of woody plants, if the stem is buried in the soil, it will fail to breathe and will fail. In order to prevent this, in one embodiment of the present invention, the stem is prevented from being buried in the soil by using the guard tube, and the rhizosphere can be developed at a desired position.

In the second year, the endoscopic camera was inserted into the root observation tube installed on the plant reaction wall, and the degree of root development was measured.

FIG. 8 is a graph showing the results of measurement of the degree of development of roots at the depths of 1.2 m and 1.5 m by inserting an endoscope camera into the root observation tube when the poplar trees were planted on the top soil according to the experimental example of the present invention, When the roots of poplar trees were planted, data of the degree of development of the roots at 1.2m 1.5m was inserted into the roots observation tube, and when the roots of the willow trees were planted at the bottom of the guard tube, (Bottom) data of the developmental extent of root at 1.2m 1.5m by inserting an endoscopic camera. 9 and 10 are photographs of a plant reaction wall cut to confirm the root development of woody plants 2 years after planting.

At first, the development of roots was not observed at depths of 1.2 m or less in the case of the soil cultivated in the topsoil, whereas in the case of poplar and willow trees planted in the ground using the guard tube, the photographs were taken at depths of 1.2 m and 1.5 m The development of root was observed clearly.

This means that the rhizosphere of the planted woody plants grows in the subterranean target soil, and a situation is formed where the ability to purify the pollutants can be demonstrated. However, when the plants were cultivated in the pot, the roots developed at the wall of the root observation tube at a somewhat lower density than at the high density at the interface between the soil and the port wall.

This is due to the fact that about 10 cm of the upper part of the root observation tube was exposed to the air due to the settlement of the soil during the course of filling the soil in the planting column of 2 m depth and the light entered from the pail.

As shown in Figs. 9 and 10, in the year, a planting tube was cut and photographed in order to directly ascertain the root development degree of woody plants 2 years after planting. Most of the roots of Poplar trees developed at a depth of 0.5 m from the surface in the test plot which was planted on the surface soil d without the guard column as already confirmed by the endoscope camera in the previous year.

Of course, roots extending to more than 1 m were observed, but this was the roots that developed along the inner wall of the experimental plastic tube rather than the roots that developed through the soil. Therefore, when applied to the actual field, It can be expected that root development will not be developed to a depth.

On the other hand, most of the roots of poplar trees planted at depths of 1 m from the ground were distributed up to 2 m below the planting depth. Although it can be accepted as a natural result because of the developed roots in the restricted space (plastic pipe for planting), it is important to protect the poplar stem by using the guard column despite the underground planting, And it is distributed in the ground.

Also, it seems that there is no difference between the present and the present in the growth of the topsoil planting test. The same results were obtained in the test plants planted with willow. Based on these results, it can be shown that when using the guard column, it can absorb and remove contaminated plume and contaminants (including nitrogen and phosphorus) in the ground due to the roots developed in the ground without hindrance to growth.

Hereinafter, the measurement results of EC, nitrogen, and phosphorus concentration changes by depth will be described. Fig. 11 is a graph showing the distribution of poplar in the topsoil from April 2013 to September 2014, when the poplar was planted using a guard tube, and when the willow was planted using a guard tube, 1.5m) EC (μS / cm). Fig. 12 is a graph showing the distribution of Poplar in the case of planting poplar in topsoil from April 2013 to September 2014, the case of planting poplar in a guard tube, the case of planting a willow in a guard tube, 1 m, 1.5 m) TN (nitrogen concentration) (g / kg). Fig. 13 is a graph showing the results of the case where the poplar was planted in the topsoil from April 2013 to September 2014, the poplar was planted using the guard tube, the seedlings were planted using the guard tube, 1m, 1.5m) TP (phosphorus concentration) (g / kg).

In the experiment, the juice was supplied twice in July 2013 and April 2014. Since the liquid treatment was carried out from the bottom, EC rise by the liquid was expected from the bottom of the soil, and when the growth period of 2014 was over, it was expected that the EC that rose in the soil would decrease again due to the absorption of the electrolyte by the root.

As shown in Fig. 11, in the test plot where poplar and willow were planted in the ground using a guard tube, 137 mS / cm was observed at a depth of 1.5 m from the ground in September 2013, , And 108 μS / cm, respectively. Then, in April 2014 (immediately after the application of 2 cold liquor), the poplar decreased slightly and the willow increased. This is due to the fact that the amount of EC increased after the first liquor disposal by the poplar and willow trees in 2013 decreased with the growth of the plants, and then the amount of EC treated in the soil decreased or increased by 2014, The difference in water uptake rate can be seen as a result.

The EC values measured in September 2014 (after 3 months of plant growth after second liquor disposal) were significantly lower in both species than immediately after second liquor disposal. This can be attributed to the decrease in the absorption of poplar and willow roots by liquid potatoes during the summer, and the removal of various pollutants in the ground by more than 1.5 m by absorbing them in woody plants. . On the other hand, in the study area where the poplar was planted on the topsoil, the EC value was measured twice before and after the supply of the liquid, and the measured value in September 2014 was higher than the initial value. This is due to the fact that the poplar planted on the surface due to the increase of the liquid was not able to effectively absorb and remove the electrolytes in the ground, which is considered to be related to the root distribution as described above. As shown in EC, concentrations of nitrogen and phosphorus in the soil were higher when the poplar and willow were planted in the groundwater using the guard tube.

As shown in Fig. 12, in the 2013 measurement, nitrogen increased from 1.2 g / kg to 2.0 g / kg in the poplar planting test group and increased from 1.2 g / kg to 1.6 g / kg in the willow planting test group . The measured values in 2014 showed very similar trend to EC changes. However, it is difficult to judge the removal rate of nitrogen and phosphorus by poplar and willow only by simple concentration change. Therefore, we will calculate the mass balance of nitrogen and phosphorus based on the final monitoring results in November 2014.

As shown in Fig. 13, phosphorus increased from 0.46 g / kg to 0.74 g / kg in the poplar plant, decreased to 0.62 g / kg during the growth period of 2014, and decreased to 0.47 g / kg to 0.83 g / kg and decreased to 0.76 g / kg. .

As shown in Table 2 below, the concentration of nitrogen and phosphorus in the poplar planted soil was higher than that of the soil-planted poplar in comparison with the nitrogen and phosphorus concentrations accumulated in the leaves of the plant. It can be interpreted that the nitrogen and phosphorus supplied from the bottom were absorbed more by the poplar in the ground that secured the rhizosphere in the ground. The concentration of nitrogen and phosphorus in 2014 was higher than that of 2013 after one treatment of liquid fertilizer. This indicates that nitrogen and phosphorus could be actively absorbed and removed by the species in the ground do.

process
Plant leaf Plant stem TN (g / kg) TP (g / kg) TN (g / kg) TP (g / kg) 2013 2014 2013 2014 2013 2014 2013 2014 poplar
(Top soil material) 15.7 29.6 2.5 3.0 8.2 11.6 1.8 2.1 poplar
(Guard tube) 13.9 37.7 3.4 4.6 7.2 9.7 1.2 2.5 Bud tree
(Guard tube) 23.6 32.4 3.0 5.3 8.5 12.8 1.8 2.8

It should be noted that the above-described apparatus and method are not limited to the configurations and methods of the embodiments described above, but the embodiments may be modified so that all or some of the embodiments are selectively combined .

1: carcass
2: Basal cancer
3: Soil
4: Excavation means
5: Perforation
10: Investment
11: Leachate
20: Plant response wall
21: Bio-tea
22: Plants
23: Guard tube
30: plant reaction wall group
100: Soil-contaminated soil containing livestock and organic materials using plant reaction walls Environmentally friendly purification facilities

Claims (10)

In a facility for purifying infiltration leachate discharged by an initial storm,
An infiltration site in which leachate is submerged at the lower side; And
The bottom surface is spaced apart from the base arm by a predetermined distance, and the bottom surface is separated from the bottom soil by a predetermined distance, And at least one plant reaction wall in which the bio-tea is mixed,
Wherein the plant reaction wall is planted with a plant having a self-constituting power capable of transferring pollutants into the interior of the plant reaction wall, the biochain adsorbs the pollutant, and the plant is adsorbed to the pollutant To the inside,
The plant reaction wall is inserted into the plant reaction wall along the longitudinal direction of the plant reaction wall to develop a rhizosphere of the plant at the lower end and to prevent a contact between the stem and the soil, Including tubes,
Wherein the plant having the pollutants transferred therein is harvested and carbonized after harvesting to produce and recycle the bio-tea. The plant reaction wall is used for the environmentally friendly purification treatment of buried soil contaminated soil containing livestock and organic matter.
delete delete delete The method according to claim 1,
Wherein the pollutant is nitrogen, an antibiotic, and a pathogen, and wherein the plant reaction wall comprises livestock and organic matter.
The method according to claim 1,
Wherein the plant reaction wall further comprises a geolite. The plant reaction wall comprises a livestock and organic matter using a plant reaction wall.
delete A method for purifying infiltration leachate discharged by an initial storm using the purification facility according to claim 1,
Burying the livestock carcass in the land of burial;
The leached water is generated in the buried carcass and is submerged on the lower side of the buried bed;
The leachate is drained by the initial storm;
A step of adsorbing contaminants of the leachate by a bio-catalyst constituting a plant reaction wall installed in a direction of the leach water; And
Wherein the plant planted on the plant reaction wall moves the pollutant adsorbed to the bio-car by self-constituting force,
The plant reaction wall is inserted into the plant reaction wall along the longitudinal direction of the plant reaction wall to develop a rhizosphere of the plant at the lower end and to prevent a contact between the stem and the soil, Wherein the root canal of the plant is developed by the guard tube,
The method of claim 1, further comprising the step of carbonizing the plant after harvesting the polluted material to produce a bio-tea, and recycling the plant. delete delete

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