JPH05192693A - Simple water purifying device for rivers - Google Patents

Abstract

PURPOSE:To efficiently purify water with ease of execution and to save the labor of maintenance and administration by successively vertically providing water purifying layer bodies consisting of zeolite layers, partially cut cocoon ball layers and charcoal layers into a cage body constituted of wire nets, grids or perforated plates. CONSTITUTION:This water purifying device 10 is constituted by successively providing the water purifying layer bodies 11 consisting of at least the zeolite layers 5, the partially cut cocoon ball layers 6 and the charcoal layers 7 vertically in the cage body 1 constituted of the wire nets 2 or the grids or the perforated plates. The suspended matter, heavy metals, nitrogen and phosphorus are adsorbed by the zeolite and the charcoal when such water purifying device is fixed and installed into the river bed by digging the river bed. In addition, many bacteria are propagated and vigorously activated by the water-soluble amino acids contained in the cocoon balls, by which the harmful materials in the water are rapidly adsorbed and decomposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification apparatus which is installed at the bottom of a river to easily improve the water quality of a contaminated river caused by the inflow of household wastewater, factory wastewater and agricultural wastewater.

[0002]

2. Description of the Related Art In recent years, deterioration of water quality in rivers has become a social problem, and the main cause of water pollution is the prevention of inflow of sewage such as household wastewater, factory effluent, and agricultural sewage, as well as small and medium-sized pollution. There is an urgent need for research and development on water purification in rivers.

In order to improve the quality of water in rivers, it is necessary to first decompose and remove organic substances that are the causative substances of dirt in water, and to adsorb and hold nitrogen, phosphorus and other heavy metals.
Up to now, the use of cobblestone, charcoal, and zeolite has been tried for purification of small and medium rivers and irrigation canals. However, these conventional ones have a limit in adsorption and cause clogging, so that they need to be washed out regularly, and maintenance is relatively troublesome.

[0004]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention It is desirable that a water purification method for small rivers flowing through agricultural and mountain villages, small and medium-sized urban areas, etc. can be simply implemented. In other words, it is suitable to have not only excellent purifying ability, but also inexpensive equipment, which is extremely easy to lay, and which has a long life and is free from clogging and maintenance. It is also important that the facility does not interfere with the habitation of aquatic animals in consideration of the conservation of the river ecosystem.

In view of the above, the present inventor has paid attention to the fact that bacteria that adsorb and decompose harmful substances in water to purify them are propagated in porous objects such as charcoal, and that silkworm cocoons are The present invention has been completed by recognizing the bacterial growth effect of the bacteria and carrying out experiments to improve the water quality.

That is, the present invention can be carried out easily (anytime, anywhere) by anyone (extremely easy to lay and does not require expensive construction cost), and moreover, heavy metals, nitrogen and phosphorus are adsorbed by zeolite, and cocoon balls are also added. It is an object of the present invention to provide a novel water purification apparatus that can efficiently purify water by multiplying a large number of bacteria, does not require maintenance and maintenance, and has a fish path that does not prevent fish from going up.

[0007]

In order to achieve the above-mentioned object, the water purification apparatus of the present invention has at least a zeolite layer and a partially cut cocoon ball inside a cage composed of a wire mesh, a lattice or a perforated plate. The main body of the purification layer consisting of the bed and the charcoal layer is sequentially provided in the vertical direction. When installing this water purification device in a river, a combination of a zeolite layer, a partially cut cocoon ball layer, and a charcoal layer is used as one unit inside the cage composed of the wire mesh or lattice or perforated plate. A plurality of water purification devices each having a purification layer main body provided in two or more stages in the vertical direction are fixedly laid on the riverbed at appropriate intervals in the river width direction and in the direction perpendicular to the river width direction, and each cage Are connected to each other by a connecting member to provide a fishway between the cages on either the front, back, left or right.

[0008]

When the purifying device of the present invention is fixedly installed by digging a riverbed, zeolite, charcoal, suspended matter in water or heavy metals,
Adsorbs nitrogen and phosphorus, and in addition, water-soluble amino acids contained in cocoon balls cause many bacteria to proliferate and become active.
As a result, harmful substances in water are quickly adsorbed and decomposed.
In addition, the fishways provided in front, back, left and right between the cages provide an environment in which fish and shellfish can suitably live.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be specifically described with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a water purification device 10 according to the present invention, and FIG. 2 is a perspective view of a purification layer main body 11.
As shown in FIG. 1, the device 10 has a gabion-like appearance, and as an example, a length of 70 cm, a width of 1 m, and a height of 70 cm.
The metal mesh 2 is attached to the 6 surfaces of the cm stainless steel frame through the reinforcing rods 1a, and the lid 3 that can be opened and closed with a hinge or the like is attached to the upper surface.
Further, a fixed leg (base) 4 having a sharp tip is attached to the bottom for fixing to the riverbed.

Further, as shown in FIG. 2, in this cage 1, as an example, there is a purification layer main body comprising a combination of a zeolite layer 5, a head cut cocoon ball layer 6 and a charcoal layer 7 from the top.
It is spread over the steps. The thickness of each layer is 10 cm,
Cover with a thickness of 60 cm as a whole, and cover 3
There was a gap of 10 cm inside and outside between.

The head cut cocoon layer means the cocoon shell of the silkworm from which the head has been cut and the pupae and the like inside have been taken out. As a guide, use about 100 cocoons per basket. As the zeolite, a calcined zeolite mass having a diameter of 80 to 160 mm is used. In addition, charcoal is laid in a cross shape or a grid shape.

The water purification apparatus 10 according to the present invention having the above-described structure has the following features when it is installed in a river:
As shown in FIG. 3 and FIG. 4, the riverbed is dug up by about 50 cm, and a plurality of pieces are fixedly laid on the riverbed at appropriate intervals of 10 to 30 cm in the river width direction and in the direction perpendicular to the river width direction. FIG. 3 shows an example in which 10 pieces in one row are connected to each other in two rows. The cages 1 and 1 are connected to each other by a connecting member 12 using bolts and nuts, and a fishway 13 is provided between the cages on the front, rear, left and right. Code 1
Reference numeral 4 is a weight that connects the cage 1 and the riverbed. With these, durability is improved and it can endure even without being washed away by heavy water.

In the above-mentioned embodiment, an example in which a stainless steel wire net is used is given, but a cage made of a lattice or a perforated plate may be used, and in some cases, a cage made of reinforced plastic is used. You may use.

Next, the effect of water quality improvement by the device of the present invention will be described.
It is as follows if it shows concretely by experimental data.
First, the present inventors dug a flow path of 5 m wide, 120 m long, and 1 m deep along the flow of the river in the Hirosegawara River in Ryokawa Town, Fukushima Prefecture. Then, ten experimental devices according to the present invention were installed as shown in FIGS. 3 and 4, respectively. After the installation, the surrounding water quality was measured to obtain the measurement data as shown in Tables 1 and 2.

[0015]

[Table 1]

[0016]

[Table 2]

As described above, according to this experiment, the apparatus of the present invention significantly reduced the values of COD and BOD in water, effectively removed nearly 99% of the suspended suspension in water, and was able to remove nitrogen and phosphorus. Was also adsorbed, and it was confirmed that the effect of water purification was remarkable.

[0018]

As is apparent from the above-mentioned experimental results, according to the present invention, since it is a water-soluble amino acid that adsorbs suspended solids in water, heavy metals, nitrogen and phosphorus, and is contained in cocoon balls, Bacteria grows actively and actively decomposes organic substances in water, so clogging is less likely to occur and water purification speed is faster. Conventionally, clogging occurs unless stones and charcoal are washed once every 1 to 3 months, but in the present invention, it is almost unnecessary to wash away the material once it is laid.

In the water purification apparatus of the present invention, a purification layer main body comprising at least a zeolite layer, a partially cut cocoon ball layer and a charcoal layer is vertically arranged inside a basket having six faces formed of a wire net, a lattice or a perforated plate. Since they are provided in sequence, they can be easily implemented by anyone at any time, anywhere, that is, they are extremely easy to lay and do not require expensive construction costs.

Further, the fishways provided in the front, rear, left and right between the cages provide an environment in which fish and shellfish can suitably live, so that it is possible to easily purify the quality of river sewage while preserving the river ecosystem. is there.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a water purification device according to the present invention.

FIG. 2 is a perspective view of the purification layer main body in the present invention.

FIG. 3 is a vertical cross-sectional explanatory view showing a method of laying a water purification device of the present invention in a river.

FIG. 4 is a plan view of the same.

[Explanation of symbols]

 1 Basket 2 Wire Mesh 3 Lid 4 Fixed Leg 5 Zeolite Layer 6 Partially Cut Cocoon Layer 7 Charcoal Layer 10 Purification Device 11 Purification Layer Main Body 12 Connecting Member 13 Fishway 14 Weights

Claims (2)

[Claims] 1. At least a zeolite layer inside a cage composed of a wire mesh, a lattice, or a perforated plate,
A water purification device in which a purification layer body consisting of a partially cut cocoon layer and a charcoal layer is sequentially provided in the vertical direction. 2. A main body of a purification layer having a combination of a zeolite layer, a partially-cut cocoon ball layer and a charcoal layer as a unit in two or more stages in the vertical direction inside a cage composed of a wire net, a lattice or a perforated plate. A plurality of water purification devices to be provided are fixedly laid on the bottom of the river at appropriate intervals in the river width direction and in the direction perpendicular to the river width direction, and the cages are connected to each other by connecting members to the front and back. A water purification system for rivers that has a fish path between the cages on either side.