JP3349433B2 - Organic chlorine compound decomposition treatment method and decomposition treatment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for decomposing organic chlorine compounds such as dioxins.

[0002]

2. Description of the Related Art Recently, a technique called bioremediation, in which contaminants are decomposed and rendered harmless by microorganisms, has attracted attention.

[0003] Bioremediation is a method of decomposing and detoxifying contaminants by utilizing the decomposing ability of microorganisms such as bacteria and fungi. -By improving the activity of microorganisms by adjusting the environment such as nutrition and ventilation, it is possible to decompose pollutants more efficiently than in the natural state.

[0004] Since such bioremediation does not use any chemical agent unlike physical treatment or chemical treatment, it is expected to be low in cost and high in safety, and its application range will be further expanded in the future.

[0005]

By the way, dioxin, which is a kind of organochlorine compound, is produced as a by-product in a chemical substance production process or a chlorination process,
Alternatively, it is a chemical substance generated in the process of burning waste, but it is extremely toxic and, when released into the environment, is unlikely to be naturally degraded in the environment. And may have a significant impact on ecosystems.

For this reason, in order to prevent the generation of dioxin itself, for example, in a combustion furnace, a high combustion temperature and a sufficient residence time at a high temperature are maintained, and the gas and air are sufficiently mixed in a turbulent manner. Measures have been taken to control the occurrence of such species.

[0007] However, at present, there is no way to safely separate and remove dioxin from the soil once it has been released into the environment in the form of being mixed into the soil.

The present invention has been made in view of the above circumstances, and provides a method and apparatus for decomposing an organochlorine compound capable of decomposing organic chlorine compounds such as dioxin released into the environment. The purpose is to provide.

[0009]

Means for Solving the Problems To achieve the above object, the method for decomposing an organochlorine compound according to the present invention comprises, among the enzymes generated during the growth of white rot fungi, A method for decomposing an organic chlorine compound in which an active enzyme capable of decomposing an organic chlorine compound such as dioxins is brought into contact with an organic chlorine compound or a contaminant contaminated with the active enzyme, wherein the active enzyme is contained in a fungal bed for mushroom growth. In contact with the organochlorine compound or contaminants contaminated by it.

[0010]

In the method for decomposing an organochlorine compound according to the present invention, the active enzyme is brought into contact with the contaminant in a form contained in the mushroom-growing bacterial bed, and then the mushroom-growing bacterial bed is brought into contact with the contaminant. Cured for a predetermined period under conditions suitable for the growth of the white rot fungus contained in the above.

Further, in the method for decomposing an organic chlorine compound according to the present invention, the nutrient to be replenished during the curing is a nitrogen-poor compound.

Further, in the method for decomposing an organochlorine compound according to the present invention, the mushroom-growing bacterial bed is a waste bacterial bed after removing the grown mushroom.

The apparatus for decomposing organic chlorine compounds according to the present invention is capable of decomposing organic chlorine compounds such as dioxins among enzymes generated during the growth of white rot fungi. A sealed container for allowing the active enzyme and the organochlorine compound or the contaminants contaminated by the active enzyme to come into contact with each other in a hollow internal space, wherein the active enzyme is contained in a mushroom growth bacterial bed and is shielded from light in the sealed container. The sealed container is provided with oxygen supply means, nutrient supply means and wetting means.

[0015]

In the method for decomposing an organochlorine compound according to the first aspect of the present invention, an enzyme capable of decomposing an organochlorine compound such as dioxins among the enzymes generated in the process of growing white rot fungi is used. Or contact with contaminants contaminated by it.

In this manner, organic chlorine compounds such as dioxins are decomposed into water, carbon dioxide, oxygen and other harmless substances by the action of active enzymes. The organic chlorine compound may be in a single state or in a state of a pollutant mixed in soil, water, air, or the like.

The organic chlorine compounds include dioxins, ie, polychlorinated dibenzoparadioxin (PCDD).
s) and polychlorinated dibenzofurans (PCDFs) or their isomers and homologues, but here, coplanar-PCB (Co
-PCBs) are also included.

The white rot fungi decompose cellulose and lignin among the wood rot fungi and mainly belong to basidiomycetes. Any white rot fungus can be used,
The use of edible mushroom fungi such as shiitake, maitake, nameko, enokitake, bunashimeji, mushroom, etc. and medicinal mushrooms such as kawatake mushroom, suehirotake mushroom, mannentake mushroom, etc., is advantageous because they can double as edible mushrooms and medicinal mushrooms.

The form in which the active enzyme is used is arbitrary, and a method of extracting only the active enzyme can be considered. However, the active enzyme is contained in the fungal bed for mushroom growth in the form of an organochlorine compound or an organic chlorine compound. By contacting the contaminants with the contaminated contaminants, the active enzymes can be easily brought into contact with the organochlorine compound or the contaminants without the labor and cost of extracting only the active enzymes.

Here, after contacting the fungus bed for growing mushrooms with the contaminant, the organic chloride compound is decomposed by the active enzyme. Although it may be made to wait, conditions suitable for the growth of the white rot fungus contained in the mushroom growth fungus bed, for example, a state where appropriate humidity and light-shielded state are maintained while performing nutritional supplementation and oxygen supplementation as needed If you try to cure for a predetermined period,
Not only the active enzyme present at the beginning, but also the active enzyme newly generated during the growth process of the white rot fungi is added to the decomposition action, and the decomposition efficiency can be improved.

[0022] In particular, if the nutrients supplied during such curing are poor in nitrogen, white rot fungi are likely to contribute to the decomposition of organochlorine compounds, such as active enzymes such as lignin degradation. Since more enzyme is produced, the decomposition efficiency is further improved.

When the active enzyme is brought into contact with the contaminant in a form contained in the mushroom growth fungal bed, as long as the active enzyme is produced from white-rot fungi, the mushroom culture substrate, culture conditions, or growth stage are as follows. Any mushroom-growing bacterial bed that is irrelevant may be used. For example, it may be used in a state where the hyphae of the white-rot fungi have been sufficiently grown and the active enzyme has been sufficiently expressed, or may be in a stage where the mushrooms have grown to some extent, but the waste bacteria after collecting the grown mushrooms may be used. If the bed is the above-mentioned mushroom-growing bacterial bed, it is possible to reuse the waste bacterial bed, which is a waste medium conventionally discarded, for the purpose of decomposing and removing organic chlorine compounds.

The method of bringing the active enzyme into contact with the organochlorine compound or a contaminant contaminated with it is optional. For example, a fungus bed for growing mushrooms containing the active enzyme is pulverized and this is contaminated with the organochlorine compound. A method of spraying and stirring and mixing solid contaminants, a method of adding and mixing with liquid contaminants, or a method of filling crushed materials in a container and distributing the liquid or gaseous contaminants in the container. Is possible. Further, a method of adding an extract containing an active enzyme to a solid or liquid contaminant contaminated with an organochlorine compound, a method of passing a gaseous contaminant through the extract, and the like are conceivable.

In the apparatus for decomposing an organochlorine compound according to the fifth aspect of the present invention, an active enzyme capable of decomposing an organochlorine compound such as dioxins and an organochlorine compound among enzymes generated during the growth of white rot fungi. Alternatively, the contaminants contaminated with the contaminants are placed in a sealed container and brought into contact with each other in a hollow space in the container.

In this way, the organic chlorine compounds such as dioxins are decomposed into water, carbon dioxide, oxygen and other harmless substances by the action of the active enzyme.

[0027] Types of organochlorine compounds and white-rot fungi, utilization forms of active enzymes, improvement of decomposition efficiency due to growth of white-rot fungi, types of microbial beds, interaction between active enzymes and organochlorine compounds or contaminants contaminated by them. With respect to the contact form and the like, the same as the contents described above also apply to the invention of claim 6, for example, while arranging the active enzyme in a sealed vessel in a light-shielded state in a form contained in a mushroom growth bacterial bed. If oxygen-supplying means, nutrient-supplying means and wetting means are provided in the sealed container, conditions suitable for the growth of white rot fungi contained in the mushroom-growing fungal bed, such as nutrient replenishment and oxygen replenishment, may be provided at any time. While performing, it is possible to cure for a predetermined period while maintaining appropriate humidity and light-shielded state. Therefore, not only the active enzyme present at the beginning but also the active enzyme generated in the growth process of the white rot fungus is added, and the decomposition efficiency can be improved. The description of the other components is omitted to avoid duplication.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a method and an apparatus for decomposing an organic chlorine compound according to the present invention will be described with reference to the accompanying drawings. It is to be noted that the same reference numerals are given to components and the like that are substantially the same as those in the conventional technology, and description thereof will be omitted.

(First Embodiment) The method for decomposing an organic chlorine compound according to the present embodiment is applied to the case where soil contaminated with dioxins is decomposed on site, and FIG. FIG. In the decomposition treatment method according to the present embodiment, first, as shown in FIG. 1A, a bacterial bed for mushroom growth is pulverized in advance to produce a pulverized material 1.

Here, as a fungus bed for mushroom growth necessary for the production of the pulverized material 1, an active enzyme capable of decomposing dioxins, which are organic chlorine compounds, in the growth process of white rot fungi is generated in the fungus bed. It is necessary that
According to the method used for cultivation and cultivation of normal edible mushrooms, for example, the mycelium of white-rot fungi is grown on a substrate thereof, for example, a medium mainly composed of a mixture of nutrient additives such as sawdust and bran. Then, the white rot fungus grows in the bed, and an active enzyme having a decomposing activity for dioxins is secreted out of the cells. As such an active enzyme, for example, lignin-degrading enzyme is considered to be involved.

It is sufficient that the active enzyme is sufficiently produced from the white rot fungus as such a fungus bed for growing mushrooms.
It has nothing to do with the degree of mushroom growth. Therefore, it can be used at various stages, such as those that have not grown as mushrooms but have grown to some extent, and those that have grown to some extent as mushrooms.However, consider recycling. For example, it is preferable to use a so-called waste bacteria bed after mushrooms have sufficiently grown and picked up for shipping.

Dioxins include polychlorinated dibenzoparadioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs).
s) or their isomers and homologs.

Next, the pulverized material 1 is sprayed on the surface of the contaminated soil 2 which is a contaminant contaminated with dioxins as shown in FIG. 3B, and then, as shown in FIG. The surface of the contaminated soil 2 is plowed using a tractor or the like. Then, the crushed material 1 of the mushroom-growing bacterial bed is stirred into the contaminated soil 2, and the active enzyme in the crushed material 1 and the dioxins in the contaminated soil 2 are brought into contact with each other.

Next, this is allowed to stand for a certain period. Note that a series of procedures such as spraying the crushed material 1 of the mushroom-growing bacterial bed onto the contaminated soil 2, stirring the cultivated soil by tillage, and then allowing it to stand still may be repeated as necessary.

In this way, the dioxins in the contaminated soil 2 are decomposed into water, carbon dioxide, oxygen and other harmless substances by the action of the active enzyme in the crushed material 1 that comes into contact therewith.

As described above, according to the method for decomposing organochlorine compounds according to the present embodiment, dioxins are decomposed into harmless substances by utilizing active enzymes generated during the growth of white rot fungi. With this configuration, the dioxin can be decomposed in a low-cost and highly safe manner.

Further, according to the method for decomposing an organic chlorine compound according to the present embodiment, an active enzyme having a decomposing activity for dioxins is contained in a contaminated soil in a form contained in the crushed material 1 of a fungal bed for mushroom growth. Because I contacted 2
The decomposition can be promoted by easily bringing the active enzyme and the dioxins into contact with each other without the trouble and cost of extracting only the active enzyme.

According to the method for decomposing organochlorine compounds according to the present embodiment, the waste bacterial bed after picking up the grown mushroom is used as a bacterial bed for mushroom growth. It becomes possible to reuse the waste bacteria bed for the purpose of decomposing dioxins.

(Second Embodiment) Next, a second embodiment will be described. In addition, the same reference numerals are given to components and the like that are substantially the same as those in the above-described embodiment, and description thereof is omitted.

As can be seen from the process chart shown in FIG. 2, the method for decomposing an organic chlorine compound according to the present embodiment is applicable to the case where soil contaminated with dioxins is decomposed on site similarly to the above-described embodiment. Although applied, in the decomposition treatment method according to the present embodiment, the crushed material 1 of the mushroom-growing bacterial bed manufactured in the same manner as in the above-described embodiment,
As shown in FIG. 3A, the soil and the water are sprayed on the surface of the contaminated soil 2 which is a pollutant contaminated with dioxins, and then, as shown in FIG. The surface of 2 is tilled and stirred, and the active enzyme in the crushed material 1 and the dioxins in the contaminated soil 2 are brought into contact with each other.

Next, the contaminated soil 2 is covered with a light-shielding sheet 11 which also serves to prevent drying. In addition, a series of procedures, such as spraying the crushed material 1 of the mushroom-growing bacterial bed on the contaminated soil 2 together with nutrients and water, stirring the cultivated soil, and then covering with the light-shielding sheet 11, may be repeated as necessary. It may be.

In this way, the dioxins in the contaminated soil 2 are decomposed into water, carbon dioxide, oxygen and other harmless substances by the action of the active enzyme that comes into contact therewith.
The active enzyme is newly generated during the growth process of the white rot fungus contained in the pulverized material 1 even during the curing period, so that the decomposition is performed with high efficiency.

As described above, according to the method for decomposing organochlorine compounds according to the present embodiment, dioxins can be converted by utilizing active enzymes generated during the growth of white rot fungi, as in the first embodiment. As it is configured to decompose into harmless substances, it is possible to decompose dioxin in a low-cost and highly safe manner, and to use an active enzyme that has decomposing activity on dioxins for mushroom growth. Since the soil contained in the ground material 1 of the floor is brought into contact with the contaminated soil 2, the active enzyme and the dioxins are easily brought into contact with each other to promote the decomposition without the labor and cost of extracting only the active enzyme. It is possible to make
In addition, the waste bacteria bed after picking up the grown mushrooms is used as a mushroom growth bacterial bed, so that waste bacteria beds that had been disposed of in the past can be reused for the purpose of decomposing dioxins. Becomes

According to the method for decomposing an organochlorine compound according to the present embodiment, the crushed material 1 of the mushroom-growing bacterial bed is added to the contaminated soil 2 together with nutrients and water. Since the soil is covered and cured, under the light-shielding sheet 11, appropriate humidity and light-shielding state are maintained, and conditions suitable for the growth of white rot bacteria in the crushed material 1 are determined. Become. Therefore, during the curing period,
Not only the active enzyme that originally existed, but also the active enzyme generated during the growth process of the white-rot fungi was added,
The decomposition efficiency of dioxins can be further improved.

Although not particularly mentioned in the present embodiment, if the nutrient added to the pulverized material 1 during curing is a poor nitrogen content, the white rot fungi may contribute to decomposing dioxins. Since the active enzyme which is considered to be high, for example, lignin-degrading enzyme is produced in a large amount, the degradation efficiency is further improved.

In the first and second embodiments,
In each case, the crushed material 1 made by crushing the fungus bed for mushroom growth was sprayed on the contaminated soil 2 at the site. Instead, the contaminated soil 2 at the site was peeled off with a bulldozer or the like, and the crushed material was added thereto. 1 may be mixed and stacked in a pile, or the contaminated soil 2 peeled off with a bulldozer or the like may be mixed with the nutrients and water while mixing the crushed material 1 with the nutrients or water, and the light-shielding sheet may be placed thereon. You may make it cover 11 and cure.

(Third Embodiment) Next, an apparatus for decomposing an organic chlorine compound according to a third embodiment will be described. Note that the same components and the like as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 3 is an overall schematic diagram of the decomposition processing apparatus according to this embodiment. As can be seen from the figure, an organic chlorine compound decomposition treatment apparatus 21 according to the present embodiment includes a sealed container 24 in which an input port 23 into which contaminated soil 2 contaminated with dioxins, which is an organic chlorine compound, is input is formed. With
The sealed container is provided with an inlet 25 into which a crushed product 1 obtained by crushing a mushroom-growing bacterial bed containing an active enzyme having a decomposing activity for dioxins is introduced.

Here, the sealed container 24 is formed entirely of a light-shielding material so as not to allow sunlight to enter therein, and has a contaminated soil 2 and a crushed material 1 in its hollow interior. A stirring screw 26 is provided as stirring means for mixing and stirring. Further, an oxygen supply pipe 27 as an oxygen supply means and a nutrition supply pipe 28 as a nutrition supply means are connected to the sealed container 24, and oxygen and nutrients are pulverized in the sealed container 24 through the respective pipes. The container 1 can be supplied with water, and a watering device 29 as a wetting means is provided above the inside of the container so that water can be supplied into the sealed container 24 at any time.

In the organic chlorine compound decomposition treatment apparatus 21 according to the present embodiment, the crushed material 1 of the mushroom-growing bacterial bed manufactured in the same manner as described in the first embodiment is sealed through the inlet 25. While being charged into the container 24, the contaminated soil 2 contaminated with dioxins is charged into the sealed container 24 via the charging port 23.

Next, the stirring screw 26 is driven to rotate, and the pulverized material 1 and the contaminated soil 2 are mixed and stirred, whereby the active enzyme in the pulverized material 1 and the dioxins in the contaminated soil 2 are brought into contact with each other. At this time, nutrients and water necessary for the growth of white rot fungi in the crushed material are supplied together with the addition of the crushed material 1.

On the other hand, after the initial supply or initial supply, nutrients and water are supplied at any time via the nutrition supply pipe 28 and the watering device 29, and oxygen is supplied at any time via the oxygen supply pipe 27.
In some cases, the pulverized material 1 is additionally supplied from the charging port 25. Then, at the time of replenishment, introduction or at any time irrespective of these, the stirring screw 26 is driven to rotate to increase the contact between the active enzyme in the pulverized material 1 and the dioxins in the contaminated soil 2 to promote the reaction. Let it.

In this manner, dioxins in the contaminated soil 2 are decomposed into water, carbon dioxide, oxygen and other harmless substances by the action of an active enzyme that comes into contact therewith.
The active enzyme is newly generated during the growth process of the white rot fungus contained in the pulverized material 1 even during the curing period, so that the decomposition is performed with high efficiency.

When the disassembly is completed, the treated soil is taken out from the discharge port 30 provided at the lower end of the sealed container 24.

As described above, according to the organic chlorine compound decomposing apparatus 21 of the present embodiment, dioxins are decomposed into harmless substances by using active enzymes generated during the growth of white rot fungi. As a result, dioxin can be decomposed in a low-cost and highly safe manner, and an active enzyme having a decomposing activity for dioxins is added to the crushed material 1 of a mushroom-growing bacterial bed. Since it is made to contact the contaminated soil 2 in a contained form, it is possible to easily contact the active enzyme with dioxins to accelerate the decomposition without the labor and cost of extracting only the active enzyme, In addition, the waste bacterial bed after picking up the grown mushrooms was used as a mushroom growth bacterial bed. It is possible to re-use in applications that process.

Further, according to the organochlorine compound decomposing apparatus 21 according to the present embodiment, the crushed material 1 of the mushroom-growing bacterial bed is added to the contaminated soil 2 together with nutrients and water, and thereafter the light-shielding property is maintained. Since the curing is performed in the sealed container 24 in the state, the appropriate humidity and the light-shielding state are maintained, and the condition is suitable for the growth of the white rot bacteria in the crushed material 1.
Therefore, during the curing period, not only the active enzyme originally present but also the active enzyme generated during the growth process of the white rot fungus is newly added, and the decomposition efficiency of dioxins can be further improved.

(Fourth Embodiment) Next, an apparatus for decomposing an organic chlorine compound according to a fourth embodiment will be described. Note that the same components and the like as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 4 is an overall schematic diagram of a decomposition processing apparatus according to this embodiment. As can be seen from the figure, the apparatus 41 for decomposing an organochlorine compound according to the present embodiment is sealed and filled with a crushed product 1 of a fungal bed for growing mushrooms containing an active enzyme having a decomposing activity on dioxins. A purifying tower 42 is provided as a container, and an inflow pipe 43 is connected to a lower end of the purifying tower for inflowing polluted air which is a pollutant contaminated with dioxins which are organic chlorine compounds. The inflow pipe 43 can be used, for example, in connection with an exhaust gas pipe of an incinerator.

Here, the purification tower 42 is formed entirely of a light-shielding material so that sunlight does not enter inside. Further, the purification tower 42 has an oxygen supply pipe 27 as an oxygen supply means and a nutrition supply pipe 28 as a nutrition supply means.
Are connected so that oxygen and nutrients can be supplied to the pulverized material 1 filled in the purification tower 42 via respective pipes, and a wetting means is provided above the inside of the purification tower. A water sprinkler 29 is provided so that moisture can be supplied to the pulverized material 1 in the purification tower 42 at any time.

In the apparatus for decomposing organic chlorine compounds according to the present embodiment, the crushed material 1 of the fungal bed for mushroom growth produced in the same manner as described in the first embodiment is used in the purification tower 42.
Then, oxygen, nutrients, and water are appropriately supplied from the oxygen supply pipe 27, the nutrition supply pipe 28, and the sprinkler 29, respectively, to maintain a state in which white rot bacteria in the crushed material 1 can proliferate.

Then, in this state, the contaminated air contaminated with dioxins flows from the inflow pipe 43 into the purification tower 42 and passes through the pulverized material 1.

In this way, dioxins in the contaminated air are decomposed into water, carbon dioxide, oxygen and other harmless substances by the action of the active enzyme in the crushed material 1 that comes into contact with the dioxins. And since such active enzyme is generated more and more during the growth process of the white rot fungus in the purification tower 42,
Dioxins in contaminated air are decomposed continuously and with high efficiency.

The decomposed air is discharged to the atmosphere from a discharge port 44 provided above the purification tower 42.

As described above, according to the organic chlorine compound decomposing apparatus 41 according to the present embodiment, dioxins are decomposed into harmless substances using active enzymes generated during the growth of white rot fungi. As a result, dioxin can be decomposed in a low-cost and highly safe manner, and an active enzyme having a decomposing activity for dioxins is added to the crushed material 1 of a mushroom-growing bacterial bed. Because it was made to contact the contaminated air in the contained form, it is possible to easily contact the active enzyme and dioxins to accelerate the decomposition without the labor and cost of extracting only the active enzyme, and furthermore, The waste bacterial bed after picking up the grown mushrooms was used as a mushroom-growing bacterial bed. It is possible to re-use in applications that sense.

Further, according to the organic chlorine compound decomposing apparatus 41 according to the present embodiment, nutrients and water are replenished as needed into the light-shielding purification tower 42 filled with the crushed material 1 of the mushroom-growing bacterial bed. Therefore, in the purification tower 42, the crushed material 1
It is an environment where the white rot fungus inside can easily proliferate. And the active enzyme which decomposes dioxins is released rapidly and rapidly with the growth process, and thus the dioxins contained in the contaminated air can be continuously and efficiently decomposed in the purification tower 42. It becomes possible.

[0066]

As described above, according to the method for decomposing organochlorine compounds of the present invention according to claim 1, it is possible to decompose dioxin in a low cost and highly safe manner. At the same time, there is an effect that the active enzyme and the dioxins can be easily brought into contact with each other to accelerate the decomposition without the labor and cost of extracting only the active enzyme.

[0067]

According to the method for decomposing organochlorine compounds of the present invention according to the second aspect, during the curing period, not only the active enzyme originally present but also the active enzyme produced during the growth process of the white rot fungus. Is added, and the effect of further improving the decomposition efficiency of dioxins can be obtained.

Further, according to the method for decomposing organochlorine compounds of the present invention according to claim 3, the white rot fungus is considered to have a high possibility of contributing to decompose dioxins, such as lignin. Since a large amount of decomposing enzyme is produced, the effect of further improving the decomposition efficiency is also exerted.

Further, according to the method for decomposing organic chlorine compounds of the present invention according to claim 4, it is possible to reuse the waste bacteria bed which had been conventionally disposed of for the purpose of decomposing dioxins. It also has the effect that it becomes possible.

According to the apparatus for decomposing organochlorine compounds of the present invention according to claim 5, it is possible to decompose dioxin in a low-cost and highly safe manner, and at the same time to grow mushrooms. It is possible to cure the white rot fungus contained in the bacterial bed for a predetermined period of time while maintaining appropriate humidity and light-shielding conditions while constantly supplying nutrients and oxygen supplementation as needed. Therefore, not only the active enzyme present at the beginning but also the active enzyme generated in the growth process of the white rot fungus is added, and the effect of improving the decomposition efficiency is also achieved.

[0072]

[0073]

[Brief description of the drawings]

FIG. 1 is a process chart showing a procedure of a method for decomposing an organic chlorine compound according to a first embodiment.

FIG. 2 is a process chart showing a procedure of a method for decomposing an organic chlorine compound according to a second embodiment.

FIG. 3 is an overall sectional view of an organic chlorine compound decomposition treatment apparatus according to a third embodiment.

FIG. 4 is an overall sectional view of an organic chlorine compound decomposition treatment apparatus according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bacterial bed for mushroom growth 2 Contaminated soil (contaminant) 11 Light-shielding sheet 21, 41 Decomposition treatment apparatus for organic chlorine compounds 24 Sealed container 27 Oxygen supply pipe (oxygen supply means) 28 Nutrient supply pipe (nutrition supply means) 29 Watering Equipment (wetting means) 42 Purification tower (sealed vessel)

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Eiko Oide 4-640 Shimoseito, Kiyose-shi, Tokyo Inside Obayashi Corporation Technical Research Institute (72) Inventor Genshiro Kawai 1-2-23 Nishikugatacho, Kiryu-shi, Gunma Mori Sangyo (72) Inventor Tokuo Tanaka 1-2-23 Nishikugatacho, Kiryu-shi, Gunma Mori Sangyo Co., Ltd. (56) References JP-A-6-91290 (JP, A) JP-A-9-224657 (JP , A) JP-A-10-323646 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B01D 53/00-53/96 C02F 3/00-3/34 B09B 3/00 -5/00 B09C 1/00-1/10 A62D 3/00

Claims (5)

(57) [Claims] 1. Decomposition of an organochlorine compound by bringing an active enzyme capable of decomposing an organochlorine compound such as dioxins into contact with an organochlorine compound or a pollutant contaminated by the enzyme, among enzymes generated during the growth of white rot fungi. A method for treating an organic chlorine compound, wherein the active enzyme is brought into contact with the organic chlorine compound or a contaminant contaminated by the active chlorine compound in a form contained in a fungus bed for mushroom growth. 2. A condition suitable for the growth of the white-rot fungi contained in the mushroom-growing bacterial bed after the active enzyme is brought into contact with the contaminant in a form contained in the mushroom-growing bacterial bed. The method for decomposing an organic chlorine compound according to claim 1, wherein the curing is performed for a predetermined period. 3. The method for decomposing organochlorine compounds according to claim 2, wherein the nutrients to be replenished at the time of curing are a nitrogen-poor compound. 4. The method for decomposing an organochlorine compound according to claim 1, wherein the mushroom-growing bacterial bed is a waste bacterial bed after removing the grown mushroom. 5. Among the enzymes generated during the growth process of white rot fungi, an active enzyme capable of decomposing an organic chlorine compound such as dioxins and an organic chlorine compound or a pollutant contaminated by the organic chlorine compound are exchanged in a hollow internal space. A sealed container to be contacted is provided, and the active enzyme is arranged in the sealed container in a light-shielded state so as to be contained in a mushroom-growing fungal bed. An organic chlorine compound decomposition treatment apparatus, which is provided.