JPH0220210B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention efficiently captures suspended matter of phytoplankton such as blue-green algae and red tide that cause pollution of lakes, sea surfaces, and rivers, or transfers them to lake shores and rivers. The invention relates to a fence-like net that prevents the spread of odor and the generation of unpleasant odors due to decomposition.

[Prior art]

In recent years, due to water pollution in lakes, seas, and rivers, large amounts of suspended phytoplankton such as blue-green algae, green algae, and diatoms have been generated, causing foul odors and damage to fisheries due to their decomposition, and more recently, they have been causing damage to drinking water. The effects of this phenomenon are beginning to appear, and it has become a major environmental problem, and countermeasures are strongly required.

In response to these demands, conventional methods have been to use oil fences to prevent the spread of plankton, vessels equipped with vacuum equipment to suck up and dispose of floating plankton, and more recently, methods such as suction, dehydration, and drying have been used. Although integrated equipment has been developed, it is expensive and requires a large amount of management costs, and the current situation is that it has not improved the environment of lakes, marshes, seas, and rivers even though it is vast.

In addition, oil fences do not have water permeability, so
The problem was that it obstructed the flow of water beneath the water surface, could have an impact on fish, and was not weather resistant.

[Purpose of the invention]

Therefore, the present invention was made to solve the above-mentioned conventional problems, and is a fence-like net mainly made of natural coconut shell fibers, which has good weather resistance and corrosion resistance, and also has water permeability. By towing lakes, sea surfaces, and rivers to more efficiently capture floating phytoplankton, and by placing the fence-like net underwater, it is possible to block the flow into rivers and approach the lake shore, thereby reducing environmental pollution. The purpose is to prevent

[Structure of the invention]

That is, in the fence-like net of the present invention, twisted threads of coconut shell fibers are formed into a fence-like net having a fine mesh structure, and the fence-like net can capture plankton suspended matter in water or prevent its diffusion. It is constructed by attaching a floating body and a weight to this.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. First, a fence-like net 1 shown in a perspective view in FIG. 1 and a side sectional view in FIG.
and a weight 3 is attached to the bottom.

This floating body 2 is made of polystyrene, polypropylene or polyethylene foam of any length (from 30 to
50 times foaming) using a square or cylindrical column, etc., and
In order to prevent floating objects such as phytoplankton from climbing over the floating body 2 due to wind waves and traction, it is desirable that the floating body 2 protrude above the water surface W by a height of about 25 cm to 30 cm above the water surface W.

In addition, in order to prevent collision damage and to enable easy installation and removal of the fence-like net 1, which is a mesh structure made of coconut shell fibers, the floating body 2 is surrounded by a resin net 5, and both ends are covered with a PVC sheet 6. It is fixed with a clip 4 made of stainless steel or resin.

The above-mentioned mesh structure is a fence-like net 1 made of twisted threads of coconut shell fibers, and a rope 7 is stretched in the axial direction of the surface of the floating body 2. Tie it to a net or secure it with a clip. A shackle 8 is attached to the tip of the rope 7, and the floating body 2 is connected by this shackle 8, so that the length can be freely set.

In addition, a fence-like net 1 made of a network structure of coconut shell fibers is attached to the resin net 5 portion of the floating body 2 having the set length with clips 9, etc., weights 3 are hung from the bottom surface, and weights 3 are hung at both ends for traction. Or set up a rope to fix the position.

Furthermore, the length of the fence-like net 1 of coconut shell fibers below the water surface W can be set arbitrarily depending on the water depth and the condition of suspended plankton, and can be used very suitably.

〔Effect of the invention〕

Therefore, by employing the fence-like net of the present invention, it is possible to efficiently capture floating matter such as phytoplankton in lakes, seas, rivers, etc., or prevent its dispersion, thereby preventing environmental pollution. It is extremely effective for water treatment, has water permeability, has little impact on fish and shellfish, and has the advantage of being relatively cheap.

In particular, the fence-like net of the present invention can be effectively applied to trapping phytoplankton such as blue-green algae or red tide.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view of one embodiment of the fence-like net of the present invention, and FIG. 2 is a side sectional view of FIG. 1. 1...Fence-like net, 2...Floating body, 3...
Weight, W...water surface.

Claims (1)

[Claims] 1. A fence-like net made of twisted threads of coconut shell fibers formed into a fence-like net with a fine mesh structure, a floating body attached above the fence-like net, and a weight attached below the floating body.