JPH09327247A - Water-treating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-treating system, capable of readily carrying out recovery of organisms or withered bodies of aquatic plants as a water treating system of a type carrying out purification by aquatic plant vegetated in shallow water area. SOLUTION: An anchor body 1 is buried in water bottom and an engaging receiving body 4 is provided in a state brought into contact with the soil of water bottom by mooring to the anchor bodies and a vegetating mat 5 is engaged with the engaging receiving body and the aquatic plant 6 is vegetated through the vegetating mat 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification technique, and more particularly to a technique for vegetating an aqueous plant in a water area and purifying the water with the aqueous plant.

[0002]

2. Description of the Related Art A water treatment system that uses water-based plants to purify water is a promising water treatment because, in addition to the effect of water purification, it also has the effect of softening the landscape of the water area to be purified. It has received widespread attention as one of the systems.

In a water treatment system utilizing an aqueous plant, for example, a type in which extracted plants such as reeds and cattails are grown on the shore to purify by a so-called shore effect, or a raft-like structure is used to water the aqueous plant. A type that purifies by cultivated cultivated (for example, JP-A-57-48390 and JP-B-5).
No. 9-4178), and further, there are various types such as a type having a shallow water reservoir such as a reservoir having a shallow water depth of about 10 to 20 cm in which water plants are planted for purification. Among them, the type that uses shallow water makes it easy to form high-density communities in aquatic plants, and it is possible to significantly increase the contact efficiency of the water to be treated with respect to this plant community. Can be expected.

However, this type has a problem in recovering living bodies and dead bodies of aqueous plants on which nitrogen and phosphorus are fixed. That is, in the type that uses shallow water, it is most effective to use a semi-extracted plant such as Cresson (Western Pepper) or Oofusamo, which is an intermediate existence of a drawn plant and a floating plant. Under normal conditions, the plant becomes deeply rooted in the bottom soil. Therefore, the living body or dead body needs to be mowed or pulled out to collect the living body or dead body, which imposes a heavy burden on the work, and also deteriorates the collection efficiency and reduces the purification efficiency.

[0005]

The present invention has been made in the background of such circumstances, and as a water treatment system of the type in which purification is carried out by an aqueous plant vegetated in a shallow water area, a living body or death of an aqueous plant is obtained. The purpose is to provide a water treatment system that facilitates body recovery.

[0006]

The water treatment system according to the present invention is based on the principle that an aqueous plant is vegetated in a shallow water area and the water purification is performed by this aqueous plant, and an anchor body is embedded in the bottom of the water. By mooring the anchor body, a lock receiving body is provided so as to be in contact with the soil on the bottom of the water, a vegetation mat is locked on the lock receiving body, and an aqueous plant is vegetated through the vegetation mat. It is characterized by that.

According to such a water treatment system of the present invention, since the vegetation mat is interposed, when the above semi-water-extracted plants are vegetated, they are cultivated on the bottom of the water in a range sufficient for active growth. Although it also takes root in the soil, its extent can be suppressed considerably compared with the case of vegetation directly on the bottom of the water. Further, in the water treatment system of the present invention,
The vegetation mat is locked to the lock receiving body by a simple locking means such as a stapler so that the vegetation mat can be easily removed from the lock receiving body by applying a slight external force when necessary. Is possible. Therefore, by peeling the vegetation mat from the lock receiving body, it is possible to easily and efficiently collect the living organisms and dead bodies of the aqueous plant, including the roots, without leakage.

In the water treatment system as described above, it is preferable that the vegetation mat using, for example, a non-woven fabric is spread on the water bottom in a stable state without floating in the water. , A material that allows the vegetation mat to be locked to the lock receiving body on the bottom of the water, and the vegetation mat can be locked by a simple locking means such as a stapler as described above, for example, a material such as wood. Desirably, for this reason, the specific gravity is generally smaller than 1, and the locking receiving body is stabilized on the water bottom by the anchor body.

The anchor body in the water treatment system is preferably formed of a plastic pipe typified by, for example, a vinyl chloride pipe. The reason is that a wide variety of types are standardized for various applications, that they are mass-produced as industrial products, are easily available, are relatively low cost, and have excellent durability. This is because it is easy to use.

Further, in the water treatment system as described above, it is more preferable to provide a microorganism immobilization layer obtained by immobilizing microorganisms by, for example, the entrapping immobilization method on an immobilizing agent using, for example, a synthetic resin. Such a microorganism-immobilized layer enables the microorganisms immobilized there to exert an effective purification action under the filter effect of the roots of an aqueous plant, thereby enabling more effective purification. In addition to functioning, it also aids the growth of aquatic plants and thereby inhibits aquatic plants from rooting in subsoil. As a result, more efficient purification can be achieved, and furthermore, it is possible to facilitate the recovery of the aqueous plant by removing the vegetation mat as described above.

Further, for the water treatment system as described above, it is possible to use a vegetation mat in which seeds of an aqueous plant have been previously sown. By doing so, it is possible to save the labor of planting the aqueous plant on the vegetation mat and improve the workability in installing the system.

[0012]

Embodiments of the present invention will be described below. First
The water treatment system according to the embodiment, as shown in FIG. 3, the retarding basin P of about 2400 m ^2, the inlet E
In the example of applying to a wide range of about 1/4 from the side, the water depth is 1
It is set to about 0 cm. The specific structure is as shown in FIGS. In order to form this, first, the water impermeable sheet S is laid on the bottom of the water, and the PVC pipe 1 having a diameter of 20 cm is installed as an anchor body on this. The PVC pipes 1 are installed in parallel with each other at intervals of about 2 m over the entire processing area. Before installation, these PVC pipes 1 are attached with mooring wires 2 at intervals of about 1 m.

Next, the soil layer 3 is formed and the PVC pipe 1 is buried. The soil layer 3 has a thickness such that the entire treatment area has a water depth of about 10 cm. Then, the cedar plate 4 used as the lock receiving body is fixed to the wire 2 so that it is anchored to the PVC pipe 1 serving as the anchor body and installed on the bottom of the water. The cedar boards 4 are arranged so as to be orthogonal to the PVC pipe 1 (FIG. 3). Next, the non-woven fabric 5 used as a vegetation mat is locked to the cedar board 4 by stapler. The non-woven fabric 5 has a width of 2 m,
The cedar board 4 should be spread in a direction orthogonal to the cedar board 4. Finally, as a water-based plant, for example, a giant sardine 6 is planted on the non-woven fabric 5.

Oofusamo 6 is a perennial plant of the family Amaranthaceae. The aerial leaf B stands upright on the water at a length of about 10 to 20 cm, while the spiral main stem K is placed in the water or the soil at the bottom of the water depending on the water depth. It takes the form of life of stretching. Therefore, in order to vegetate the giant sardine, it suffices to first place it on the non-woven fabric 5, and it can be naturally rooted as the reproductive activity becomes active.

With such a water treatment system
In order to collect the dead body and the living body, the non-woven fabric 5 is peeled off from the cedar board 4 while winding the non-woven fabric 5 together with the offal moth 6 in a date winding shape. As a result, dead bodies and living bodies can be easily and completely recovered.

The water treatment system according to the second embodiment is
As shown in FIG. In this water treatment system, the microorganism fixing layer 7 is provided between the nonwoven fabric 5 and the soil layer 3. The microbial immobilization layer 7 is formed by laying a microbial immobilization body in which microorganisms are immobilized by an entrapping immobilization method or the like on a sheet-shaped immobilizing agent using a synthetic resin or the like. Also, Cresson 8 is used as an aqueous plant. The cressons 8 are germinated and grown by seeding the seeds on the nonwoven fabric 5 in advance. To sow Cresson seeds on a non-woven fabric, it is rational to utilize the non-woven fabric manufacturing process. Since the other structural elements are basically the same as those in the first embodiment, the same reference numerals as in FIG. 1 are given and the description thereof is omitted.

[0017]

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to easily and efficiently recover living organisms and dead bodies of aqueous plants, and to more effectively purify the utilization of aqueous plants in shallow water areas. It becomes possible to do it.

[Brief description of drawings]

FIG. 1 is a sectional view schematically showing structural elements of a water treatment system according to a first embodiment.

FIG. 2 is a sectional view in a direction orthogonal to the state of FIG.

FIG. 3 is an explanatory diagram of an arrangement state of an anchor body and a lock receiving body in the water treatment system according to the first embodiment.

FIG. 4 is a sectional view schematically showing structural elements of a water treatment system according to a second embodiment.

[Explanation of symbols]

 1 PVC pipe (anchor body) 4 Cedar board (locking body) 5 Nonwoven fabric (vegetation mat) 6 Oofusamo (aqueous plant) 7 Microorganism immobilization layer 8 Cresson (aqueous plant)

Claims (5)

[Claims] 1. A water treatment system in which an aqueous plant is vegetated in a shallow water area to purify the water quality by the aqueous plant, wherein an anchor body is embedded in the bottom of the water, and the anchor body is moored to anchor the bottom of the water. A water treatment system characterized in that a lock receiving body is provided in contact with soil, a vegetation mat is locked on the lock receiving body, and an aqueous plant is vegetated through the vegetation mat. 2. The water treatment system according to claim 1, wherein a plastic pipe is used as the anchor body. 3. A wood is used as the lock receiver.
Alternatively, the water treatment system according to claim 2. 4. The water treatment system according to any one of claims 1 to 3, wherein a microorganism-immobilized layer obtained by immobilizing microorganisms on an immobilizing agent is provided between the vegetation mat and the soil at the bottom of the water. 5. The water treatment system according to claim 1, wherein a vegetation mat in which seeds of an aqueous plant have been sown in advance is used.