JPS6261357B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] Algae that float like green powder in eutrophic lakes and marshes are generally called blue-green algae. When this algal bloom occurs in large quantities, there are various problems such as significantly deteriorating water quality and clogging water treatment equipment. The present invention relates to a device for collecting and removing this algal bloom.

[Conventional technology]

Conventional methods for removing blue-green algae have been attempted, such as adding flocculants to precipitate the water, or passing it through special filters, but these methods are too expensive to treat large amounts of water. There were economic problems.

[Technical background of the invention and its problems]

In view of the above-mentioned problems, the present invention attempts to collect and remove algae using a simple device without using a flocculant or a filter.

[Means for solving problems]

The present invention consists of a floating body whose axial direction is the vertical direction, a large number of upper and lower support rods protruding radially from above and below the circumferential surface of the floating body, and countless annular fluffs stretched between the upper and lower support rods and surrounding the floating body. The dense cord material becomes twisted,
The attached bed, which is made up of numerous cords with countless ring-like fluffs, stretched between the upper and lower support rods supported by a floating body, is constantly swaying and floating in the water due to waves and water currents. This material is designed to frequently come into contact with algal blooms, which are adherent algae, and efficiently collect the blue-green blooms on the string material. The algal blooms are then removed because the protozoa and rotifers that prey on the blue-green algae settle on the bed where a large number of cord materials are stretched, and the algae are attached to the algae. The protozoa and rotifers that preyed on the blue-green algae become food for migrating fish, and the fish are captured by humans.The food chain occurs naturally, and the blue-green algae can be removed as part of the natural food chain. This is what I did.

[Effect]

A large number of string members, which are held in the water by a floating body and stretched vertically by upper and lower support rods, are constantly rotating or moving up and down due to the waves and sway in the water. In addition, blue-green algae are originally sessile algae, and have the characteristic of floating and sinking, surfacing on the surface of the water during the day to carry out photosynthesis, and sinking to the bottom of the water at night to absorb nutrients.
There is a greater chance of contact with the adhering bed made up of a large number of cord strips, and the cord is reliably captured by the numerous annular fluffs that grow densely around the cord strips. In this way, the adhesion bed consisting of a group of string materials to which algae has adhered,
Protozoa and rotifers settle there and feed on algal blooms to reproduce. Furthermore, the protozoa and rotifers that breed in the string group become food for migrating fish, and when the fish are captured, a food chain is established naturally and algal blooms are removed.

〔Example〕

Embodiments of the invention will be described with reference to the accompanying drawings.

1 is an elongated cylindrical floating body, the inside of which is hollow or filled with foamed polystyrene, etc., and in order to maintain the axial direction vertically, a weight material is stored at the bottom, or a ventilation hole with a hole 2 at the top end; In some cases, a water hole 8 is formed at the lower end and water is poured therein so that the buoyancy can be adjusted so that the whole body floats on the water surface. Further, a large number of support rods 3, 4 are provided radially projecting from the upper and lower sides of the circumferential surface of the floating body 1, and are arranged so that the positions of the upper and lower support rods 3, 4 are different from each other. The tips of the upper and lower support rod groups 3 and 4 are wires 9 and 10, respectively.
are connected in a ring. Further upper support rod 3
The tips of several of these are suspended from the upper end of the floating body 1 with wires 11. Further, a string strip 5 is stretched between the upper and lower support rods 3 and 4 so as to form a V-shaped wave in the vertical direction, and this string strip material 5 is stretched in the length direction of each support rod 3 and 4. are placed at appropriate intervals. Strap material 5
is a knitted fabric made of synthetic fibers, and numerous annular fluffs 6 made of protruding fibers formed into an integral ring are densely grown on the circumferential surface.

The adhesion bed 7, which is constructed around floating bodies as described above, is floated on a lake or marsh by connecting one or more of them with ropes, and the ropes are moored to fixed objects.

Next, the operation of the above embodiment will be explained.

An attached floor 7 floating in the water of a lake and marshes connected by ropes etc. swings vertically and horizontally due to the waves, and the blue-green algae floating in the water is attached to a large number of string members 5 stretched in a V-shaped wave shape in the vertical direction. contact and is captured by the annular fluff 6. The blue-green algae captured by the string material 5 is removed by protozoa and rotifers that prey on it, and furthermore, the protozoa and rotifers become food for the fish family, and the fish family are used by humans. They become part of the food chain and undergo natural selection.

〔Effect of the invention〕

According to the present invention, there is a floating body whose axial direction is the vertical direction, a large number of vertical support rods protruding radially from the top and bottom of the circumferential surface of the floating body, and numerous vertical support rods extending between the vertical support rods. Because it is made up of cord material with dense annular fuzz, when the attached bed is suspended in water, the attached bed, which is made up of a large group of string materials strung vertically, sways vertically and horizontally due to waves and water currents. It can efficiently come into contact with blue-green algae, which have a life characteristic of floating and sinking, and can be efficiently captured by the ring-shaped fuzz that grows around them. The blue-green algae trapped in the string material are then preyed upon by protozoa and rotifers, and these protozoa and rotifers feed on fish, so the algae are removed through the natural food chain. This method is economically very advantageous and requires less effort than the methods of adding a flocculant or using a special filter.

[Brief explanation of the drawing]

FIG. 1 is a front view of the algal bloom removing device of the present invention, FIG. 2 is a longitudinal sectional front view of the same, FIG. 3 is a cross-sectional plan view, and FIG. 4 is an enlarged front view of a part of the cord material. 1... Floating body, 3, 4... Support rod, 5... Strap material, 6... Annular fluff.

Claims (1)

[Claims] 1. A floating body whose axial direction is the vertical direction, a large number of upper and lower support rods that protrude radially from above and below the circumferential surface of this floating body, and countless ring-shaped fluffs that are stretched between the upper and lower support rods and densely grow around the circumference. A blue-green algae removal device characterized by comprising a string material.