JP2002018422A - Formed body for treating pollutant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a formed body for treating a pollutant in such a state that a bacterial bed having a treating capacity of the pollutant is handy and does not flow out of the surface of soil by a rainfall or the like and does not lose a shape. SOLUTION: A bacterial bed 2 such as both a bacterial bed of eatable bacteria having a treating capacity of the pollutant and a waste bacterial bed is disentangled and inserted into the gap of a labyrinthian structure 1 which is formed of a synthetic resin and a metal having flexibility and has a suitable shape and size. The whole is formed into a mat shape, a bar shape or a block shape or the like. The surface of this formed body is covered with nonwoven fabric. Thereby, the effect preventing an outflow of the bacteria bed may be raised moreover.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pollutant-treated molded article and a pollutant-treating material for decomposing and treating hard-to-decompose substances contained in waste or contaminated soil and adversely affecting the environment.

[0002]

2. Description of the Related Art In recent years, soil near a waste incineration plant has become a major social problem because it is contaminated with organochlorine compounds such as dioxin, trichloroethylene and tetrachloroethylene contained in incineration ash. In addition to organic chlorine compounds, solvents for cleaning substrates, aromatic carbohydrates such as benzopyrene, and other substances that are contaminated with contaminants that are hardly decomposable substances, such as mercury substances, have also caused problems. is there.

[0003] In addressing this problem, the present inventors have developed a bacterial bed containing a mixture of sawdust, medium additives and water in order to inoculate mushrooms, for example, white-rot fungi, and to grow their hyphae. It has been found that when mixed with contaminated soil containing substances or contaminants, the contaminants are decomposed by the synergistic effect of the growing mycelium and the decomposing enzyme generated by the fungi. In this specification, a bacterial bed for inoculating and growing edible mushrooms is particularly referred to as an edible bacterial bed. In addition, the present inventors have collected used mushrooms grown on the above-mentioned fungus bed, and used the fungus bed, which was conventionally discarded when the waste fungus bed was mixed with the contaminants or contaminated soil. Also found that pollutants were similarly degraded.

[0004] Therefore, bacterial beds such as edible bacterial beds and waste bacterial beds, crushed materials obtained by crushing them, or slurries obtained by dissolving the crushed materials in water are mixed, stirred or injected into contaminated soil. This has been added to decompose contaminants.

[0005]

However, when a bacterial bed is added to contaminated soil by the method described above, it is necessary to mix a large amount of the bacterial bed into the soil using a soil improvement or leveling machine. This required a lot of work. In addition, according to the above method of merely mixing the bacterial bed with the contaminated soil, the bacterial bed may flow out of the soil surface due to rainfall and the like, particularly on a slope such as a slope, and the pollutant is sufficiently decomposed. Could not.

Accordingly, an object of the present invention is to provide a fungal bed having a contaminant treating ability in a form that is easy to handle and does not flow out of the soil surface or lose its shape due to rainfall or the like.

[0007]

In order to achieve the above-mentioned object, the present invention provides a method of forming a bacterial bed having a capability of treating contaminants into a mat, bar, block or spherical shape. A material-treated molded article is provided. The contaminated material-treated molded body may be provided on the outside or inside thereof, and may use shape keeping means for keeping the shape of the molded body.
Further, it is preferable that the bacterial bed is an edible bacterial bed or a waste bacterial bed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The contaminated substance-treated molded article of the present invention will be described below with reference to examples. For example, bacterial beds such as an edible bacterial bed and a waste bacterial bed capable of treating contaminants are pulverized, and the powdered bacterial bed is dissolved in water to form a slurry suspension. This suspension is kneaded with reinforcing long fibers such as waste plant fibers (for example, straw) as a shape-retaining means for maintaining the shape of the bacterial bed, and the resulting mixture is matted in a mold having an appropriate shape and size. ,
It is shaped into a bar, block, or sphere to form a contaminated material-treated molded body.

On the other hand, FIG. 1 shows a labyrinth structure 1 of an appropriate shape and size made of a synthetic resin, a flexible metal or the like.
2 shows an example in which the loosened bacterial bed 2 is put into the gap and is entirely formed into a mat shape. Furthermore, the surface of the molded body thus formed may be covered with a nonwoven fabric to further enhance the effect of preventing the outflow of the bacterial bed. Alternatively, the loosened bacterial bed 2 may be inserted into the gap of the labyrinth structure 1 and formed into a bar shape, a block shape, a spherical shape, or the like.

[0010] In the case of a mat-shaped contaminated substance-treated molded article, the mat-shaped molded article may be laid on the surface of contaminated soil containing the contaminant, or the mat-shaped contaminated soil may be placed in the contaminated soil containing the contaminant. Throwing the pollutant-treated molded body of
The contaminated soil and the compact may be in a laminated state.
In the case of a bar-shaped, block-shaped or spherical contaminated material-treated compact, the compact must be supplied by pushing it into the contaminated soil containing the pollutant, or by throwing the compact into the contaminated soil as appropriate. I just need.

As described above, the bacterial bed is formed into a mat-like, bar-like, block-like, or spherical shape to obtain a contaminated material-treated molded body, which facilitates handling of the bacterial bed when supplying the bacterial bed. The floor can be evenly distributed over the contaminated soil. In addition, since the microbial bed is formed, the microbial bed hardly flows out due to rainfall and the like even on a slope such as a slope, the bulk specific gravity can be reduced, and the transportation cost can be reduced. Particularly, the mat-shaped contaminant-treated molded article is excellent in the effect of suppressing the outflow of the bacterial bed.

After several weeks, hyphae grow from the bacterial bed mixed with the contaminated soil, and decomposing enzymes are generated during this growth process. The contaminants in the waste are decomposed and made harmless by the synergistic effect of the grown hypha and the decomposing enzyme. For example, in the case of anthracene, pyrene and phenanthrene, 200 ppm is reduced by 90% in one month, and in case of benzpyrene, it is reduced by 60%. About dioxin 2
0000pg TEQ / g decreases by about 60% in 2 months.

[0013] The germ beds, such as edible bacterial beds and waste bacterial beds, capable of treating contaminants, and powdered bacterial beds obtained by pulverizing the same, have been made to be able to flow water and air and have grown. A contaminant treatment material is prepared by enclosing in a bag of an appropriate size through which mycelium can pass, or a solution obtained by dissolving a crushed bacterial bed in a solution such as water in a container of an appropriate shape such as an ampule. It can also be sealed and used as a contaminant treatment material.

By burying such a contaminant-treating material together with the bag in the contaminated soil, taking out the bacterial bed from the bag, or cutting the ampoule to take out the solution of the bacterial bed and spraying it on the soil. The contaminants in the contaminated soil can be decomposed by the synergistic effect of the hypha and the decomposing enzyme grown from the bacterial bed.

[0015]

According to the contaminant-treated molded article and the contaminant-treated material of the present invention, the bacterial bed having the contaminant-treating ability is formed into an appropriate mat, bar, block or spherical shape. Or it is kept in a shape such as labyrinth structure, reinforcing fiber or non-woven fabric, or enclosed in a bag or container. It can be prevented from flowing out of the soil surface due to rainfall and the like, and from being out of shape. Further, since the contaminant-treated molded article of the present invention is formed by forming a bacterial bed, the bulk specific gravity can be reduced, and the transportation cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a contaminant-treated molded article of the present invention.

[Explanation of symbols]

 1 Labyrinth structure 2 Bacteria bed

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C12R 1: 645) C12R 1: 645) (C12N 1/00 B09B 3/00 E C12R 1: 645) ZABA ( 72) Inventor Toshiya Okada 4-640 Shimoseito, Kiyose-shi, Tokyo Inside the Obayashi-Gumi Technical Research Institute (72) Inventor Eiko Oide 4-640 Shimoseito, Kiyose-shi, Tokyo In the Obayashi-Gumi Technical Research Institute (72) Inventor Tsuji Hirowa 4-640 Shimoseito, Kiyose-shi, Tokyo F-term in Obayashi Corporation Technical Research Institute Co., Ltd. (reference)

Claims (3)

[Claims] 1. A contaminant-treated molded article obtained by molding a bacterial bed capable of treating contaminants into an appropriate shape such as a mat, a bar, a block, or a sphere. 2. The contaminated substance-treated molded article according to claim 1, further comprising a shape-retaining means provided outside or inside the contaminated substance-treated molded article to retain the shape of the molded article. 3. The contaminant-treated molded article according to claim 1, wherein the bacterial bed is an edible bacterial bed or a waste bacterial bed.