JPH084097A - Drain path purifying structure - Google Patents

Abstract

PURPOSE:To purify a drain path by disposing a waterproof foundation at the wall surface of the drain path, and disseminating microorganisms thereon. CONSTITUTION:Artificial grass 16 is formed by planting resin grass leaves 24 on a foundation, formed of a urethane sheet or the like with rubber chips put therein, by bonding, concrete nails or machine screw fastening, or the like. Microorganisms 29 along with sand grains 27 are disseminated in the grass leaf cavities 26 of the artificial grass 16. The microorganisms 29 show active movement in the sand grain cavities so as to decompose and digest pollutant in flowing water. The artificial grass 16 disposed at the side wall of a drain path enables the inhabitation of the microorganisms 29. The microorganisms 29 are nitrate reduced bacteria, denatured bacteria, oxidation-decompose organic substance so as to change it into inorganic substance, and decompose and digest various pollutant in the flowing water so as to maintain the surface of the artificial grass 16 always in the sanitary state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to wastewater purification technology for various drainage channels and water distribution pipes, and more particularly to a water purification structure utilizing microorganisms in a general flow path.

[0002]

2. Description of the Related Art Various concrete secondary products or resin products are used for flowing domestic wastewater and irrigation water. There are various types such as a trough (groove) having a U-shaped cross section, a U-shaped cross section, a rectangular pipe such as a snow melting ditch, or a circular pipe such as a sewer pipe or an agricultural underdrain.

Wastewater flowing through such concrete grooves may flow into the river or the sea as it is. In this case, a water purification facility may be provided to treat the collected water, but most of the domestic wastewater, some factory wastewater, or agricultural channels also discharge the wastewater to rivers or the sea.

The conventional drainage route is intended to discharge unnecessary water as quickly as possible, and therefore the running water surface of the concrete trough, FRP pipe, etc. is finished smooth. For the treatment of contaminated water, in the case of domestic wastewater flowing into a river or factory wastewater, the wastewater may be introduced into a treatment facility before being discharged into the sea, and aeration or coagulation treatment may be performed.

[0005]

By the way, the facility cost of the wastewater treatment plant is high. For this reason, it is very difficult to individually arrange water purification facilities for all rivers and drainage facilities. In the case of the national and local governments, the budget is limited, and efforts are being made to gradually develop the rivers from highly polluted rivers, but it is not easy to carry out sufficient water treatment within the limited budget.

On the other hand, if the various drainage routes are left as they are, the pollution of the river and the sea becomes more serious. Since factory wastewater is required to be purified, it is in the direction of improvement in recent years, but domestic wastewater and agricultural wastewater have not been sufficiently regulated, and problems have already become apparent in Tokyo Bay, the Seto Inland Sea, Kasumigaura, and Lake Biwa. ing.

[0007] These problems simply go beyond the stage where the water should be clean. For example, alkaline components eluted from concrete grooves, toxic substances used for pesticides and herbicides, or human fecal virus cannot be resolved by water purification treatment by chlorine disinfection or coagulation in conventional systems, and toxic substances contained in wastewater. However, there is a risk that it will become clean water and be returned to the human body again.

In order to solve such a problem, it is necessary to purify the domestic wastewater and various wastewater itself, while promoting the water purification action in the drainage system to further improve the efficiency of the water purification treatment in the river. Therefore, an object of the present invention is to make it possible to purify the wastewater (wastewater) flowing through the drainage path as much as possible.

[0009]

In order to achieve the above-mentioned objects and achieve the above-mentioned object, a purification structure for a drainage route according to the present invention has a waterproof base cloth having unevenness on at least the lower surface of the wall surface of the drainage route. Set up. In addition, microorganisms may be sprayed on the base cloth.

[0010]

The drainage route according to the present invention is provided with the waterproof base cloth at least on the lower surface. By arranging a waterproof base cloth, alkali elution in concrete grooves is prevented. Further, since the base cloth has an uneven surface, the flowing soil, sand grains, and mud form a sedimentary layer to form a natural environment suitable for habitation of microorganisms. In addition, this soil particle deposition layer is protected from alkali of the concrete by the disposed surface base cloth, and therefore has a favorable pH environment for microorganisms.

The base fabric according to the present invention can be arranged on an existing trough or pipe. Wastewater is purified by activating the microorganisms on the base cloth surface, but the microorganisms may be spontaneously inhabited. Of course, preferably, the microorganisms are sprayed together with the base cloth construction. Microbial activities require their homes, which can be left to the natural sedimentary layers formed exclusively by the soil, mud, sand, etc. that flow with the drainage. As a matter of course, sand grains or soil may be arranged on the surface of the base fabric from the beginning of construction.

The microorganisms applied to the base cloth are basically natural aerobic microorganisms which are usually present in nature. Although anaerobic microorganisms are generated in the basin where the pollutant concentration of wastewater (wastewater) is high, the activity of aerobic microorganisms is suppressed from the beginning to suppress the activity of anaerobic microorganisms, and sulfate contained in wastewater (sewage, etc.) It becomes possible to reduce the reducing action of converting (particularly sulfur content) to hydrogen sulfide. Conventionally, excessive corrosion of concrete drainage facilities has progressed due to the conversion action of anaerobic microorganisms, but by promoting the habitation of aerobic microorganisms from the beginning, the activity of anaerobic microorganisms is suppressed and corrosion of concrete pipes is suppressed. It is possible to suppress it. Of course, in the present invention, since the waterproof base cloth is arranged on the concrete surface, corrosion of concrete pipes (including trough) can be minimized even if anaerobic microorganisms act.

Aerobic microorganisms act in a sedimentary layer (sand grain voids) similar to natural soil, decomposing various pollutants and purifying running water. Since the base cloth has irregularities, a minute aeration action is constantly performed on the running water surface. When the base cloth is placed not only on the bottom surface but also on the side wall surface, the aeration effect is further enhanced, and the microorganisms are protected from the eluted alkali.

Further, when the enzyme is arranged on the base cloth surface (or the deposited layer), the decomposition performance of the pollutant components in the initial stage of the laying work can be enhanced. Although the microorganisms according to the present invention include enzyme-producing microorganisms, the decomposition efficiency is markedly improved in the initial stage by filling a certain amount or more of the enzyme.

When soil or sand is arranged at the beginning of construction of the base cloth, it is possible to mix water-purifying ceramic particles at the same time. Water-purifying ceramics release odorous gas trapped in water molecules due to electromagnetic wave effects, etc.
Operates a unique water purification function not found in natural earth and sand.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a drainage path according to the present invention. The drainage trough 10 is made of concrete and has a substantially U-shaped cross section, and its lower surface 11 and both side surfaces 14 are covered with artificial grass 16. The concrete molding part is the same as the conventional concrete secondary product, and it does not matter whether it is new or existing. Further, instead of the artificial grass, a mat, cloth or other sheet formed of a waterproof material may be arranged. This is because the habitat environment for microorganisms is the same as artificial turf. In that case, the unevenness formed on the surface of the base cloth may have a shape that can reliably form a deposited layer of soil, mud, sand, or the like, and does not need to have grass-leaf-like protrusions like artificial grass. Absent.

The artificial turf 16 is arranged by an appropriate method such as adhesion, concrete nailing, or screw fixing. The arrangement method does not matter. Therefore, for example, as shown in FIG. 2, the projection 22 provided on the lower surface of the base cloth 21 is attached to the concrete wall surface 1
It may be fitted (adhered) in the fitting recessed portion 23 formed in 9 (11, 14).

The artificial turf 16 is, for example, as shown in FIG.
Resin turf leaves 24 are planted on an underpad (base cloth) 21 made of a urethane sheet containing rubber chips, etc.
6 is filled with sand grains 27 at an appropriate density. In the prior art, in order to prevent the sand grains 27 from being compacted, the roots of the turf blades 24 are filled with organic grains such as olefin resin having a rubber-like elasticity and having a grain size of 2 mm or less, and the sand grains 27 are filled thereover.
Was sprayed to form a surface layer material (Japanese Patent Application Laid-Open No. 03-1257).
No. 04 gazette) In the artificial turf 16 according to the present invention, elasticity during movement is not relevant, and therefore it is not necessary to dispose such organic particles. Further, when the grass leaves 24 are straight, the sand grains 27 are likely to be solidified at the root of the grass leaves 24, and thus the grass leaves 24 may be three-dimensionally planted in a zigzag manner (Japanese Patent Laid-Open No. 04-297604).

The microorganisms inhabiting the sand grains are usually aerobic microorganisms, so-called natural beneficial microorganisms, and not a single microorganism but a plurality of soil microorganisms and certain enzyme-producing microorganisms. Mix and coexist. This microorganism 29 may be sprayed together with the sand grains 27,
Later, only the microorganisms may be sprayed alone. Regarding the spraying of the sand grains 27, for example, the devices described in JP-A-04-293802 and JP-B-03-24646 are known. When spraying the microorganisms 29 with the sand grains 27,
Microbes may be sprayed by mixing with the sand grains. Microorganism 29
When spraying only, a small spraying device such as a spraying device may be used.

Microorganisms 29 which are sprayed and lived in the turf space 26
Specifically, for example, hyclin Σ (Bio 24; trade name; Sankai Kasei Co., Ltd.) is used. This is a soil microbe inoculated and fixed on porous inorganic fine particles,
It is composed of pasteurized macrococcus and nitrobacteria, which are nitrogen-fixing bacteria. A typical microorganism has a scientific name of "Speroterius Nautau", which is a nitrate-reducing bacterium which is a kind of nitrobacterium (denaturing bacterium), and has an action of oxidizing and decomposing organic substances into inorganic substances. Other microorganisms that can be used include, for example, Aspirisca, Oxytrica, Euprotes, Peranema, Amoeba, Tecameba, Arsera, Centropissikis, Euglifa, Rotaria, Correlera, Liquein, Monostila, Caenototas, Macrobiotas, Cholepus,
Fluorodon, amphireptus, lithonotas, kilodonera, akineta, tocophilia, bolticera, calcesium, zoosumnium, epistilis, opelclaria, pixicora, brepharisma, and spirostomam are used selectively.

When such microorganisms 29 are made to inhabit the lawn leaf voids 26 of the artificial grass 16 containing the sand grains 27, the microorganisms 29 actively move in the sand grain voids and the running water (drainage)
Decomposes and digests various pollutants inside, and keeps the artificial grass surface always hygienic.

The sand grains 27 and the microorganisms 29 are mainly arranged on the lower surface 11 part. Even with microbial activity on the lower surface 11, the water purification effect is certainly improved. Desirably the side wall portion 14
Also, it is desired to seal the sand particles 27 and the microorganisms 29, but since they fall by gravity, a water-permeable thin film (including a panel material provided with micropores) is provided on the side wall 14 to keep the sand particles 27 from falling. It is preferable to prevent it. However, even if the artificial grass 16 arranged on the side wall 14 does not have the fine sand grains 27, microorganisms can live in it, and since the artificial grass irregularities arranged on the side wall 14 aerate and aerate the flowing water, Provide a favorable environment (oxygen). Further, by arranging the artificial turf 16 on the trough surface exposed to the outside, the appearance of the drainage trough such as the underdrain can be improved, and an unprecedented environmental appearance can be provided.

The microorganism 29 contains a sludge degrading enzyme. This is because the initial decomposition efficiency of running water (wastewater) is improved by including the enzyme. The enzyme used in this case is, for example, a proteolytic enzyme (protease), a lipolytic enzyme (lipase), a cellulolytic enzyme (cellulase),
Such as starch degrading enzyme (amylase). Enzyme is pH
For example, in the case of protease, if an exo type or endo type obtained from a microorganism of the genus Bacillus is used, the activity is not lost even in a strongly alkaline environment.
In the case of lipase, the lipase-producing gene DNA derived from Humicola lanuginosa is used as Aspergius oryza DN.
Lipase recovered by transferring to A can be used, and this lipase does not lose its activity even at around pH 10. The lipase-producing microorganisms include, for example, Humicola lanuginosa. In addition, it is desirable that such an enzyme is granulated with a stabilizer or enclosed in a fine capsule before use.

On the other hand, it is also possible to use purified water ceramics instead of the sand grains 27. As the purified water ceramic, for example, a sintered fine powder containing silver, copper and zinc is used. Further, divalent and trivalent iron salts (JP-A-61-272627) and platinum ceramics (JP-A-62-184088) are also effective in purifying polluted water. These water-purified ceramics have the property of being activated by receiving ultraviolet rays, so there is a concern that the water-purifying action will deteriorate with long-term use, but it is possible to maintain the desired effect if maintenance is performed at a prescribed cycle. . This is because if it is exposed to ultraviolet rays for several hours (preferably 10 hours or more), the water purification effect of about half a year can be surely exhibited. In addition, in the water purification structure according to the present invention, a simple aeration device, a filter or a trap may be provided at a predetermined position of the drainage path.

The water purification structure according to the present invention is not limited to the U-shaped trough, but may be a circular pipe 5 such as a sewer pipe as shown in FIG.
1, a dish-shaped gutter 53 as shown in FIG. 5, a three-sided water channel 55 as shown in FIG. 6, an L-shaped trough 57 as shown in FIG.
It can be similarly applied to the murmuring water channel 60 as shown in FIG. 8, a rectangular pipe (not shown) such as a snow melting groove, other drainage grooves, and drainage pipes. In these figures, the base cloth (for example, artificial grass) is indicated by reference numeral 50. The symbol W is the running water surface. Further, in FIG. 8, reference numeral 61 is a natural stone, 62 is a concrete riverbed, 63 is small gravel, and 64 is a concrete nail for fixing the base cloth 50. By arranging the base cloth 50 and the microorganisms in a flowing water path such as the murmuring water path 60, algae such as blue-green algae do not adhere, and the malodor can be eliminated.

The base cloth to be provided is not limited to artificial grass, but may be a microporous mat, a waterproof woven synthetic cloth or a non-woven cloth. These base fabrics may be arranged not only on the bottom surface but also on the side surfaces and the top surface. Although it is desirable to apply such a structure to a concrete product or a resin product, it is also possible to dispose a base cloth in a general river or a so-called babble to make microorganisms inhabit. In that case, the riverbed may be a concrete surface, or gravel may be laid to provide a base cloth.

[0027]

As described above, according to the purification structure of the drainage route according to the present invention, it is possible to reliably prevent the growth of harmful mold fungi inhabiting the drainage route and always maintain a hygienic environment. Become.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing an example of an artificial turf according to the present invention.

FIG. 2 is a cross-sectional view showing an example of a laid structure of artificial turf according to the present invention.

FIG. 3 is a diagram illustrating a conventional artificial grass.

FIG. 4 is a cross-sectional view showing an example in which the artificial turf according to the present invention is applied to a circular tube.

FIG. 5 is a cross-sectional view showing an example in which the artificial grass according to the present invention is applied to a dish-shaped gutter.

FIG. 6 is a cross-sectional view showing an example in which the artificial turf according to the present invention is applied to a three-sided waterway.

FIG. 7 is a cross-sectional view showing an example in which the artificial turf according to the present invention is applied to an L-shaped trough.

FIG. 8 is a cross-sectional view showing an example in which the artificial turf according to the present invention is applied to a murmuring waterway.

[Explanation of symbols]

 10 Drainage Trough 11 Lower Surface 14 Both Sides 16,50 Artificial Grass 19 Concrete Wall Surface 21 Base Fabric 22 Projection 23 Fitting Recess 24 Resin Grass Leaf 26 Grass Leaf Void 27 Sand Grain 29 Microorganism 60 Seseragi Channel 61 Natural Stone 62 Concrete Riverbed 63 Small Gravel 64 Concrete nails

Claims (2)

[Claims] 1. A structure for purifying a drainage path, characterized in that a waterproof base cloth is provided on at least a lower surface of a wall surface of the drainage path. 2. The purification structure for a drainage route according to claim 1, wherein microorganisms are sprayed on the base cloth.