JPH0663542A - Floating container for water purification - Google Patents

Abstract

PURPOSE:To provide a purifying mechanism in which a purifying agent can easily be changed.receivered and also whose purifying capacity is excellent and the bottom sludge is effectively utilized. CONSTITUTION:The floating container for water purification is constituted of a container 1 capable of floating on water, and plural holes capable of passing water are provided on a wall surface under the surface of water, and a container 3 is formed of a net made of stainless, and the water purifying agent is housed in the net.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification floating container which can float on the surface of water such as rivers, ponds, swamps and lakes and which contains a water purification agent inside.

[0002]

2. Description of the Related Art Recently, due to an increase in domestic wastewater,
Water pollution of river beds, sea, ponds, lakes, swamps, etc. has become a serious problem. Conventionally, measures against such problems have been implemented mainly by tightening regulations on the discharge of substances such as phosphorus, which causes eutrophication, and by spraying a purifying agent.

[0003]

The latter of these measures is intended to positively improve the current water pollution and prevent water pollution even if the pollutants are excreted. It is considered to be effective in. However, if the purifying agent is thrown into water, the purifying agent whose purifying performance is deteriorated cannot be exchanged, and the purifying agent cannot be collected and reused, and further, the purifying agent may be accumulated on the bottom of the water.

Further, as the applicant of the present application has previously pointed out,
The bottom of river beds, the sea, ponds, lakes, swamps, etc. has sediments that cause the destruction of the natural environment, and although such sediments are regularly dredged, they emit a foul odor. There is also a problem that it is not suitable as a late landfill material, and that this must be effectively utilized.

Therefore, the present invention makes it easy to replace the purifying agent.
It is an object of the present invention to provide a purifying mechanism that can be recovered and has excellent purifying ability. In addition to this purpose, another object is to provide a purification mechanism that effectively utilizes bottom mud.

[0006]

In order to achieve this object, the present invention comprises a container capable of floating in water, and a plurality of holes through which water can pass through the wall surface of a portion below the water surface. And a water purification agent is stored in the portion. As this purifying agent,
Pellets on which the purified microorganisms are fixed can be used by firing the dried bottom mud to make it porous. In addition, it is preferable to provide a fin on the water surface of the container that swings the container under the resistance of wind. Further, it is desirable to have a mechanism for connecting adjacent containers to each other.

[0007]

According to the present invention, since the purifying agent is contained in the container that can float on water, the purifying agent can be easily exchanged and recovered. Then, a plurality of holes are formed in the portion below the water surface of the container, water flows into the container through the holes, and water flows out of the container through the holes, so that water that contacts the purifying agent is always present. It can be circulated to improve the water purification capacity. In particular, by providing fins that rock the container on the water surface of the container that receives wind resistance, the water quality is improved by forcibly circulating the water even when the water flow is small. be able to. In the present invention, a portion below the water surface of the container may be formed into a net-like member, or a plurality of holes may be formed to form a porous structure.

As the above-mentioned purifying agent, known purifying agents such as activated carbon can be widely used. Particularly, it is possible to effectively use the bottom mud by using pellets composed of the bottom mud, which will be described later. Is preferable because it exhibits excellent purifying ability. The bottom mud pellets have a structure in which dried bottom mud is fired to make it porous, and purification microorganisms are immobilized. When the bottom mud is fired, the plant fibers contained in the bottom mud are carbonized, and this carbon surface is exposed on the inner wall of the porous body. Then, since the purification microorganisms are fixed in the pores, when the treated water flows into the pores, contaminants in the treated water are adsorbed on the carbon surface and are decomposed and purified by the purification microorganisms. . Further, since the present pellet is porous, it has a large adsorption area and can fix a large amount of purification microorganisms. Further, the inside of the pores is an optimum environment for purification microorganisms.
Therefore, the adsorption performance and purification performance of the pollutant can be further improved.

Since the bottom mud pellets float in water, there is no particular problem even if a relatively large amount is stored in the floating container. Since such bottom mud pellets can take oil such as crude oil floating on the water surface into the pores, they can also be used as an oil adsorbent. Further, by fixing the oil-purifying microorganism in the pores, it can be used as an oil decomposing material.
The bottom mud can be made porous by introducing air into the bottom mud and forcibly stirring it while drying and firing the bottom mud. Then, the bottom mud contains plant fibers, and the bottom mud becomes porous by carbonizing it in the process of firing.

The firing temperature is 400-1500.
C. is preferable. The firing is preferably performed twice.
And, as the purification microorganisms, Japanese Patent Application Laid-Open No. 2-153
Anaerobic and aerobic microorganisms such as bacteria, bacterial amoeba, photosynthetic bacteria, and bacteria described in 889 can be used. As these microorganisms, as described in JP-A-2-153889, those obtained by culturing in a medium in which water is adjusted by adding fallen leaves to decomposed fiber of alkaline plant fiber (such as grape skin) are used. can do.

The microorganisms have a low temperature (about 25 to 30 ° C.), a medium temperature (about 35 to 40 ° C.), and a high temperature (45 to 60 ° C.).
Culture may be carried out under any temperature condition of
It is preferable to use microorganisms cultivated at medium temperature. Since the microorganisms are present inside the pores of the pellet, they are not washed away when the water temperature is low or when the water flow increases.
Since this bottom mud pellet is inorganic porous, it is suitable for culturing microorganisms and is preferable as a water purification agent.

[0012]

An embodiment of the present invention will be described with reference to the drawings. 1 is a side view showing an entire floating container for water purification according to an embodiment of the present invention, FIG. 2 is a front view of this floating container, FIG. 3 is its plan view, FIG. 4 is its bottom view, and FIG. FIG. 6 is a top perspective view of a water purification floating container in which bottom mud pellets are charged, and FIG. 6 is a bottom perspective view thereof.

The floating container 1 is composed of a so-called reverse ship type upper container 2 and a so-called ship type lower container 3.
The upper container 2 is formed in a hollow shape to form an air chamber that is a reservoir of air when placed on the water surface, and gives the floating container necessary buoyancy.

The upper container 2 is preferably made of a member having a lower specific gravity than water, for example, wood or resin, and in the case of resin, it is preferably made of resin having light resistance. Fins 4 are provided at the front and rear ends of both side surfaces of the upper container 2 so as to project obliquely upward. The fins also project vertically from the top of the container. And inside the container,
In particular, as shown in FIG. 5, a plurality of chambers 6 are divided by partition walls 5 installed in the vertical direction (vertical direction).

The lower container 3 is composed of a stainless net. Then, as shown in FIG. 6 in particular, the inside thereof is divided into a plurality of rooms 8 by partition walls 7 installed in the vertical direction (vertical direction).

The lower end of the upper container 2 and the upper end of the lower container 3 can be connected to each other via a detachable engagement mechanism (not shown). This engagement mechanism is arbitrarily selected from a hook mechanism and a bolt tightening mechanism. When the floating container 1 is poured into water, the upper container 2 serves as an air chamber and is located above the water surface, and the lower container 3 is located below the water surface.

In the lower container 3, bottom mud pellets, on which dried bottom mud is fired to be porous and fixed with purification microorganisms, are stored. Since the bottom mud pellets are dispersed and stored in the plurality of chambers of the lower container 3, it is possible to prevent the bottom mud pellets from being offset. This bottom mud pellet is manufactured by the following method. As mud, riverbeds, ponds,
Use the bottom mud of marshes, lakes, etc., collected by a dredger. The collected bottom mud having a water content of about 95% is dehydrated with a forced dehydrator to a water content of about 50%. Then, the bottom mud naturally dried in the previous step (having a water content of about 20%) was crushed, and the dehydrated bottom mud (having a water content of about 50%) was crushed.
To mix. The mixing ratio was forced dehydrated bottom mud: naturally dried bottom mud = 6: 4. From this, bottom mud having a water content of about 28 to 30% was obtained.

Next, this bottom mud is crushed by a roller crusher and mixed to form a clay. This is pushed out by an air pump, and high speed stirring is carried out by a stirrer while pressurizing bubbles in the clay. A flocculant and a deodorant (microorganism) for deodorizing the bottom mud are put into the bottom mud during high-speed stirring to completely remove the bad odor, and then the bottom mud is sent to a pellet molding machine. In this way, the completed pellets are fired in a rotary kiln (rotary kiln). The temperature at this time is 400-
The temperature was 600 ° C., and the second time was 700 to 1000 ° C. When manufacturing the oil adsorbent, the second temperature is set to 15
Set to 00 ° C. As a result, the organic fibers inside the bottom mud are carbonized in the first firing step, and the whole is made porous in the second firing step. The size of the pellet was set so that it could be accommodated in the divided chamber of the lower container 3.

Next, after cooling the pellets, 100 kg of pellets, 8 liters of water, 300 g of purification microorganisms
The mixture at a ratio of 1 is stirred at room temperature for 30 minutes to immobilize the purification microorganisms in the pores of the pellet.

Next, the pellets on which the purification microorganisms are immobilized are stored in the divided chambers of the lower container 3,
The upper container is attached to the lower container 3. In this way, the floating container was completed.

Next, a water quality purification experiment was conducted using the bottom mud pellets. This experiment is in Kasumigaura, depth 30c
m, width 20 cm for experimental use, and a plurality of bottom mud pellets were floated over the 4 m long canal so that the total weight of the pellets charged in the floating container 1 was 120 kg. , Kasumigaura source water was passed through this waterway. Then, the COD (chemical oxygen demand amount) on the downstream side of the bottom mud pellets after a lapse of a predetermined time was detected. The results are shown in Table 1.

[0022]

[Table 1]

As shown in Table 1, the bottom mud pellets according to this example clearly reduce the COD (mg / liter) of the Kasumigaura source water with time, and the bottom mud pellets have a water purification effect. It was confirmed to have.

Next, the operation of this embodiment will be described. When the floating container 1 of this embodiment is poured into water, the upper container 2 is above the water surface and the lower container 3 is submerged in water. lake,
There is a water flow in swamps, rivers, etc. Water flows into the lower container through the openings in the net that forms the lower container 3, contacts the bottom mud pellets, and purifies the water quality, and then through other openings. Spilled out of the container. By circulating the water in the container 3 in this way, the water is continuously purified, and the purification capacity can be improved. Such water circulation can be forcibly performed by the fins 4 swinging the upper container 2 in response to wind resistance. This is effective in purifying water when the water flow is small. The floating container 1 can float on the water surface, and the upper container 2 and the lower container 3 can be easily exchanged / collected by detaching the engagement mechanism (not shown) from the lower container 3. You can
In addition, since the floating container 1 does not settle on the bottom of the water,
It is also possible to prevent clogging of the holes in the net of the lower container 3 and reduce the frequency of maintenance.

As shown in FIG. 7, the front and rear end surfaces of the floating container and both side surfaces thereof may be provided with a mechanism 12 capable of connecting the floating containers adjacent to each other, for example, a connecting mechanism using a wire. As a result, a large number of floating containers can be expanded two-dimensionally, the water purification capacity can be improved, and a floating jetty composed of floating containers can be constructed. Furthermore, the floating containers can be expanded to the center of lakes, swamps, etc. by ships. It can be leaked.

Further, as shown in FIG. 8, the floating containers are connected two-dimensionally, and a net 14 having an anchor 13 is installed at the bottom of a predetermined floating container to protect the body from sharks. It is also possible to provide protective nets and fishing nets at the same time.
It is also possible to use it as an oil fence by replacing the net 14 with a sheet or the like.

Further, in this embodiment, the lower container 3 is made of a stainless net, but the present invention is not limited to this, and a resin net may be used, and a container made of metal, resin, or the like. Alternatively, a plurality of holes may be formed.

The shape of the floating container is such that it floats in water and
As long as a plurality of holes are formed at least in the portion below the water surface, the present invention is not limited to the example. In this embodiment, the inside of the upper container 2 is divided by the partition walls 5 to form a plurality of chambers 6, and the inside of the lower container 3 is divided by the partition walls 7 to form a plurality of chambers 8. However, the upper container 2 and the lower container 3 may be formed without being divided by the partition wall.

[0029]

As described above, according to the floating container of the present invention, it is possible to provide a purifying mechanism in which the purifying agent can be easily exchanged / collected and the purifying ability is excellent. It is possible to provide a purification mechanism that effectively uses bottom mud.

[Brief description of drawings]

FIG. 1 is a side view of a purification floating container according to an embodiment of the present invention.

FIG. 2 is a front view thereof.

FIG. 3 is a plan view thereof.

FIG. 4 is a bottom view thereof.

FIG. 5 is a top perspective view thereof.

FIG. 6 is a bottom perspective view thereof.

FIG. 7 is a plan view showing a state where floating containers adjacent to each other are connected.

FIG. 8 is a side view showing a second embodiment of the connection of floating containers.

[Explanation of symbols]

 1 Floating Container 2 Upper Container 3 Lower Container 4 Fin 12 Connection Mechanism

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C02F 3/08 Z 3/10 A E02B 15/00 Z 9231-2D

Claims (4)

[Claims] 1. A container that can float on water is provided, and a plurality of holes that allow water to pass through the container are formed on a wall surface of a portion below the water surface, and a water purification agent is stored in the portion. Floating container for water purification. 2. The floating container for water purification according to claim 1, wherein the water purification agent is a pellet in which dried bottom mud is fired to be porous and fixed with purification microorganisms. 3. The floating container for water purification according to claim 1, wherein a fin for oscillating the container upon receiving wind is provided on a portion of the container above the water surface. 4. The floating container for water purification according to claim 1, further comprising a mechanism for connecting adjacent containers to each other.