JP2000202479A - Water cleaning water channel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To utilize the microorganism in the soil to sewage treatment and also to treat water by effectively utilizing the oyster shell abandoned, particularly to prevent the eutrophication due to domestic waste water. SOLUTION: The water channel is constituted with the porous concrete 10 in which the mixture of the ground matter of the oyster shell and zeolite is incorporated, and the microorganism in the soil is adhered to the voids to decompose dirt, moreover, the phosphorus being the cause of the eutrophication is adsorbed to the mixture of the ground oyster shell and the zeolite. And the sewage decomposing capacity is improved by combining the U-shaped groove 1 consisting of porous water quality purifying body and the storage decomposition accelerating tank provided with an aerating means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification channel for purifying water in drainage channels for domestic use, irrigation channels, rivers, and the like.

[0002]

2. Description of the Related Art In order to prevent environmental pollution and water pollution due to sewage, a purifying device including a oyster shell filling tank is installed in a drainage channel or a water channel (Japanese Patent Laid-Open No. 4-200696), and a porous concrete block is adsorbed with phosphorus. Blocks (burned mixture of volcanic ash and ferrous sulfate) are installed in waterways (Japanese Patent Laid-Open No. Hei 10-263530).

[0003]

The above-mentioned water purification device is to be added to a water channel. The water channel main body and the water purification device are separately manufactured, and the water purification device is installed in the water channel. Therefore, it is good to add to existing waterways, but it is troublesome to construct a new waterway, and only microorganisms existing in the water can contribute to the decomposition of filth, making effective use of microorganisms innumerable in the soil I couldn't. The present invention aims to make it possible to use microorganisms in soil for sewage purification, and to effectively use oyster husks discarded as undesired substances to purify water, especially to prevent nutrient enrichment by domestic wastewater. It is.

[0004]

Means for Solving the Problems By forming a water channel with porous concrete mixed with a mixture of ground oyster shell and zeolite, microorganisms in soil are used for decomposing soil, and further, ground oyster shell and zeolite are used. This adsorbs and removes phosphorus and nitrogen which cause eutrophication. In addition, a decomposition accelerating tank made of porous concrete mixed with a mixture of crushed oyster hulls and zeolite is provided in the middle of the waterway, so that when water flows into the decomposition accelerating tank, air is caught in the water to make it aerobic. It promotes the decomposition of filth and improves the decomposition ability.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The void portion of porous concrete functions as a microorganism carrier, and sewage is decomposed and purified.
Nitrogen and phosphorus, which are nutrient-rich substances, are adsorbed and removed by a mixture of crushed oyster shell and zeolite. In addition, since porous concrete has irregularities on the surface,
Water flow resistance increases, turbulence is generated, and air is drawn into the water from the surface of the water, whereby natural aeration is performed, aerobic microorganisms are activated, and the purification ability of the water channel is improved. In addition, a decrease in the speed of the water flow makes it easier for the biofilm to adhere to the surface of the uneven portion of the porous concrete, and also increases the surface area, thereby promoting the decomposition of contaminants.

[0006] As shown in Fig. 2, porous concrete is a porous concrete produced by mixing a large ratio of coarse aggregate 20 with fine aggregate as compared with ordinary concrete. And zeolite 22 are mixed to obtain a porous water purification body. Crushed oyster shell
About 5 mm, 10 to 35% (% by weight) is mixed with concrete. The zeolite is mixed with concrete at 8 to 18% (% by weight).

FIG. 1 shows an embodiment in which a U-shaped groove 10 is manufactured from porous concrete 1 mixed with oyster shells. The water purification channel is made of porous concrete 1
0. As shown in FIG. 3, a porous purifying body 11 made of porous concrete may be provided in a part of the U-shaped groove channel 1. When the porous water purifier 11 is scattered in a water channel,
Install on the outer surface of the waterway, on the inner surface, or at an appropriate position.

FIG. 4 shows various installation locations of the porous water purifier 11. Inside and outside of the side wall of the channel,
And an example in which a porous water purifier 11 is provided on the bottom surface. The porous water purifier 11 is provided only on the surface layer side of the water channel bottom surface, so that flowing water does not penetrate outside the water channel. The flow velocity of the flowing water is reduced by the resistance of the surface irregularities of the porous water purification body. Microorganisms in the soil adhere to the voids of the porous water purification body 11 made of porous concrete on the outer surface together with the soil, thereby contributing to the decomposition of filth. The water channel shown in FIG. 5 is provided with a porous water purifier 11 made of porous concrete over the entire thickness of the bottom surface, in which flowing water penetrates outside the water channel through the gap, and filth is decomposed by microorganisms in the ground. .

Further, a porous water purifier 11 is provided for the water channel.
If is made detachable, it can be replaced when it becomes clogged by using it for a long time, so that its effect can be maintained. There is no restriction on the size and shape of the waterway, and the size and shape that can be easily handled can be freely selected. In addition to the U-shaped groove, the shape may be circular, square, elliptical, horseshoe, inverted horseshoe, or the like.
FIG. 6 shows a case in which a core 15 of ordinary concrete is provided at the center of the cross section of the porous concrete 10 of the U-shaped groove, and strength is required. In addition, since the core 15 has a water blocking effect, water permeates only from the upper part of the U-shaped groove.

FIG. 7 shows an arrangement in which a decomposition accelerating tank 50 made of porous concrete having a depth greater than the depth of the water channel is provided in the middle of the U-shaped groove. At the entrance of the decomposition accelerating tank 3, a shielding plate 31 is provided in a direction perpendicular to the water flow, a throttle device 32 for narrowing the water flow to increase the flow velocity, and an air intake port 33 are provided. This is an example in which an aeration device is installed at the bottom of the decomposition promoting tank, and the decomposition promoting tank 3 becomes aerobic by the aeration, thereby promoting the decomposition of waste. The pump P of the aerator is driven by a solar cell so that it can be operated even without a power source. The expansion device and the aeration device may be installed independently, and the device to be adopted is determined in consideration of the water quality of the water channel and the conditions of the installation location.

FIG. 8 shows natural minerals such as fine sand, coarse sand, gravel, amphibole and zeolite, and organic substances such as charcoal, bamboo charcoal and activated carbon around the outside of a water channel of porous concrete or outside the above-mentioned decomposition promoting tank. , Shellfish such as oyster shells, various slags,
A water treatment substrate 4 (including soil itself) in which plastics, ceramics, or the like are used alone or in combination is provided. If the water treatment base material 4 is selected in accordance with the contaminants in the waterway, it is possible to remove substances causing eutrophication such as nitrogen and phosphorus, and also to reduce the BOD to 5 ppm or less in terms of water quality. It is possible to lower.

FIG. 9 shows that the bottom of the U-shaped groove and the inner surface of the side wall are made of porous concrete mixed with the mixture of the oyster hull powder and zeolite of the present invention, and the lower part thereof is made of porous concrete. 5 are installed. The infiltration basin 5 may be either ordinary porous concrete or porous concrete mixed with oyster hull powder and zeolite. The outside of the infiltration basin 5 is filled with the water treatment base material 4 as in the example of FIG. The water treatment substrate 4 may be filled in the infiltration basin 5. The water flow in the U-shaped groove flows down from the bottom to the permeation tub 5 and flows out further from the permeation tub 5. The contaminants are purified in the infiltration basin 5 and the water treatment substrate.

[0013]

According to the porous water purifier of the present invention, microorganisms in the soil adhere to the pores of the porous concrete to decompose dirt and purify the water, and furthermore, oyster shells and zeolite are used to remove eutrophic substances. Since phosphorus and nitrogen are adsorbed and removed, environmental pollution due to domestic wastewater is prevented. By using this as a water channel, the BOD of the water channel is reduced, and organic matter is decomposed, so that the amount of sludge reaching the final treatment plant can be reduced by 50% or more, and rich nutrients can also be removed. It can realize water purification of lakes and rivers at low cost.

[Brief description of the drawings]

FIG. 1 is a perspective view in which a porous water purifier is a U-shaped groove.

FIG. 2 is a conceptual diagram of porous concrete obtained by mixing oyster shell and zeolite.

FIG. 3 is a perspective view of an embodiment in which a porous water purifier is provided in a part of a U-shaped groove.

FIG. 4 is a cross-sectional view illustrating an arrangement of water purification bodies.

FIG. 5 is a sectional view of a U-shaped groove having a water-permeable bottom surface.

[Fig. 6] U with a core provided in the center of porous concrete
Sectional drawing of a character groove.

FIG. 7 is a side sectional view of a water purification water channel provided with a decomposition promoting tank.

FIG. 8 is a cross-sectional view of a water purification water channel provided with a water treatment base material outside a U-shaped groove.

FIG. 9 is a cross-sectional view of a water purification channel in which the bottom of the U-shaped groove is made permeable and a permeation basin is provided at the bottom.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 U-shaped groove 10 Porous concrete 11 Water purification body 15 Core 2 Coarse aggregate 21 Crushed oyster hull 22 Zeolite 3 Decomposition accelerating tank 31 Shielding plate 32 Squeezing device 33 Air intake

Claims (7)

[Claims] 1. A water purification channel made of porous concrete mixed with a mixture of crushed oyster shell and zeolite. 2. A water purification channel in which a water purification body made of porous concrete mixed with a mixture of ground oyster shell and zeolite is detachable. 3. The method according to claim 1, wherein
A water purification channel equipped with a turbulence generator. 4. The water purification channel according to claim 3, wherein the turbulence generator has a narrow channel width and a high flow velocity. 5. The method according to claim 1, wherein
A water purification water channel equipped with an aeration device. 6. A water purification water channel according to claim 1, wherein a water purification body is provided around the outside of the water channel. 7. A water purification water channel wherein at least the bottom of the water channel is made of porous concrete mixed with a mixture of crushed oyster hulls and zeolite and has permeability, and an infiltration basin is provided below the water channel.