JP2000343073A - Stain-proofing and algae-proofing agent and treatment of submarine installation appliance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a stain-proofing and algae-proofing agent of a natural system which eliminates the worry on ocean contamination relating to stain-proofing and algae-proofing methods for fishing nets, ropes, floats, etc. SOLUTION: This stain-proofing and algae-proofing agent prevents the adhesion of microorganisms and alga to fishing gear by the effect of the enzyme of thermophilic bacteria living in the high-temperature seawater of >=80 deg.C. The thermophilic bacteria are subjected to a high-temperature fermentation treatment and are further selectively propagated while the desired bacterium groups are intensified in functions in the environment including the animals and plants for pest control. Porous materials in the form of fine powder which are carriers for the thermophilic bacteria to be propagated are added as side materials to the agent described above and if necessary, a binder or glue to impart adhesive power to the fishing gear, etc., are added thereto. The fishing nets, etc., to be subjected to the stain-proofing and algae-proofing treatment are immersed into a dispersion of the selectively propagated thermophilic bacteria and the carriers and are dried. The use of the stain-proofing and algae-proofing agent by incorpolating the agent into a coating material is possible as well.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to antifouling for preventing microorganisms, algae, and shellfish in seawater from adhering to equipment used in the sea or on the sea, such as fixed nets, aquaculture nets, ropes, floating balls, and ships. The present invention relates to an anti-algae agent and an anti-fouling / algae treatment method, and relates to an environmentally-friendly anti-fouling / algae preventive agent and an anti-fouling / algae treatment method containing microbial enzymes.

[0002]

2. Description of the Related Art Fixed nets and aquaculture nets that have been immersed in seawater for a long period of time, floating balls (floats) and ropes used in these nets, and the bottom of fishing boats, etc., have submerged microorganisms, algae and small shellfish. Animals and plants attach and proliferate or die,
As a result, fishing gear and the bottom of the ship are soiled. In order to prevent this, fishing nets and ropes are impregnated with antifouling and anti-algae agents before use to prevent the landing of microorganisms and algae. It is painted with paint containing the agent.

Conventionally, chemicals which have been impregnated for the purpose of preventing algae in fixed nets and aquaculture nets in fisheries are mainly composed of organic nitrogen sulfur-based chemicals. Although the toxicity is lower than that of organotin-based drugs used before that, concerns about marine pollution by these antifouling and antialgal agents have not been solved.
However, at present, there is no antifouling / algaeproofing agent that has been confirmed to be safe in all aspects, and it is currently being used unavoidably despite the desire for its appearance and concern over marine pollution.

[0004]

SUMMARY OF THE INVENTION In order to prevent seawater from being contaminated by an antifouling / algaeproofing agent, the present invention is a natural antifouling and antifouling agent which is mainly used for the treatment of fishing gear and is free from marine pollution. An object of the present invention is to provide an anti-algal treatment method and an antifouling / algae preventive agent used for the treatment.

[0005]

SUMMARY OF THE INVENTION The present invention is characterized in that adhesion of microorganisms and algae to fishing gear is prevented by the action of an enzyme of a thermophilic bacterium that lives in high-temperature seawater at 80 degrees Celsius or higher. Thermophilic bacteria live on the sea floor where hydrothermal deposits erupt,
Shrimp and small fish are homes, and nutrients are obtained from these homes. In the present invention, this kind of thermophilic bacterium is subjected to high-temperature fermentation treatment by a compost reactor or the like to selectively grow,
Further, in an environment containing a large amount of animals and plants to be controlled, a fungal group having excellent antifouling and antialgal functions is selectively grown while enhancing its function.

In such a treatment, a fine powdery porous material serving as a carrier for the thermophilic bacteria to be proliferated is added as an auxiliary material, and if necessary, a binder for imparting adhesive force to fishing gear and the like. Or glue is added.

[0007] Fishing nets to be used for antifouling and antialgal treatment
It is immersed in a dispersion of the thermophilic bacterium selectively grown by the above method and a carrier and dried. At this time, a sizing agent or an adhesive according to the material of the fishing gear is added as necessary, so that the carrier on which the thermophilic bacteria are implanted is firmly attached to the surface of the fishing gear.

[0008] The inoculum is extracted at a high temperature of about 100 degrees Celsius from crab, shrimp, small fish and the like collected in the deep sea. Further, contaminants such as algae and plankton attached to the fishing net are introduced into the inoculum, and cultured at a high temperature again. As a result, it is possible to selectively proliferate and extract the target bacterium having the antibody (a bacterium having antifouling and antialgal functions), and the extracted thermophilic bacterium group (microorganisms that undergo high-temperature fermentation) has antioxidant properties. Inevitably, it has a heat-resistant enzyme and chitin. Further, a natural binder or adhesive is mixed with the target bacterium at a certain ratio to prevent the target bacterium from being eluted into the sea. It is thought that the effect of the antioxidant complex component of the thermophilic bacterium group prepares the priority environment of the ecosystem around the fishing gear put into the sea, thereby exerting the antifouling and antialgal action.

[0009] The antifouling and antialgal action is due to the action of the enzyme of the thermophilic bacterium. Whether the thermophilic bacterium is alive or dead on the carrier attached to the fishing gear depends on the antifouling and antialgal function. is not a problem.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION As a porous auxiliary material serving as a carrier for microorganisms, a shell of coffee, wheat, tea, or the like is preferably mixed with shells of shrimp or crab, and washed with hot water at 85 ° C. or more for about 60 minutes, and this is washed for 2 days or more. Dry by sun drying or use of far infrared rays. This treatment removes impurities, and also serves as sterilization and sterilization. After drying, pulverization is performed to obtain a porous fine powder that can be uniformly dispersed in water. 2. Marine products such as shrimp, crabs, and small fish that live in the deep sea are subjected to high-temperature fermentation using a thermophilic compost reactor.
The processing conditions are 85 to 115 degrees Celsius for 24 hours or more. The normal temperature bacteria are killed by the high temperature load, and the thermophilic bacteria are selectively grown to obtain the seed bacteria. 3.2 mixing the inoculum obtained in 2 with the porous fine powder obtained in 1
Implant on the auxiliary material by heating culture (about 6 hours at 60 degrees Celsius), and then add seawater containing zooplankton or phytoplankton to be removed, and add the water at a temperature of about 60 degrees Celsius. After holding for 24 hours, a microorganism containing an antibody against seawater microorganisms, algae, and shellfish is selectively proliferated to obtain a treatment solution containing a thermophilic target bacterium exhibiting stable and safe physiological activity. 4.3 Add an auxiliary material to the treatment solution to strengthen the chitinous component having a binder property, and add an alkali-resistant sizing agent to give stronger adhesion to fishing nets. For more than 5 days at 40-50 degrees Celsius. As the sizing agent, it is necessary that the dry film is insoluble, and natural or synthetic substances such as starch paste are used.
The mixing ratio between the fine powder of the auxiliary material and the adhesive is, for example, about 8: 1, and the two are stirred and uniformly mixed.

The following are examples of additives for imparting binder properties. (1) Chitin chitosan (ultrafine powder) 5 to 10% (2) Sodas 5 to 10% (3) Alcohols added or not added (4) Water 90 to 80% (5) Starch added or not added 5 . A prescribed amount of the treatment liquid obtained by the above treatment is introduced into a container, and a fishing net and a rope are introduced. Padding for more than 10 minutes for impregnation, squeezing and spreading, and drying in the sun for 4-5 days.

[0012] The nets treated by the above method were actually installed in the sea, and the state of adhesion of algae over time was determined. Table 1 shows a comparison with a net treated with an alga. The test location is about 5 m below the sea level along the coast of the Japan Sea, and the test period is from the beginning of June to the end of November. The evaluation was performed by visually observing the adhesion state of algae, and ◎, ○, △, ×, ×
X was evaluated on a 5-point scale. The evaluation points in parentheses indicate that the higher the score, the smaller the adhesion of algae.

[Table 1]

Further, the inoculum obtained in 2 and the porous fine powder obtained in 1 are mixed, and the resulting mixture is heated and cultivated (at about 60 ° C. for about 6 hours) to be implanted on the auxiliary material to obtain a fine powder obtained by mixing 2 times. It was added to the liquid paint and applied to the surface of a plastic float (floating ball) and floated on the sea surface. The results are shown in Table 2 in comparison with floats that were not treated with algae. The test location is about 0 to 0.5 m below the sea level along the coast of the Japan Sea and the test period is about 2 years. The evaluation method is the same as in Table 1.

[Table 2]

The processing conditions of the test float are as follows. Coating liquid composition: urethane resin + curing agent + dried seed (thermophilic target bacteria + porous fine powder) Coating: spray application (approximately 200 per square meter)
g) Curing and aging: leave for about 24 hours and dry naturally (fixation of thermophilic target bacteria) Curing: 60 degrees Celsius for 20 minutes

[0015]

According to the present invention, the adhesion of algae and shells to the fishing net is prevented by the action of microorganisms using natural products as raw materials. An environment resistant to microorganisms is created, and a stable and safe antifouling and antialgal effect against algae and shellfish can be exhibited over a long period of time.

Continuation of the front page F term (reference) 4B033 NA01 NA12 NB49 NB56 NB68 NC04 ND15 ND20 4H011 AD01 BA01 BB21 BC19 BC22 DA14 DH10

Claims (4)

[Claims] 1. An antifouling / algaeproofing agent for instruments for installation in the sea, which is mainly composed of an enzyme of a thermophilic bacterium that lives in high-temperature seawater at 80 ° C. or higher. 2. An antifouling / algaeproofing agent for underwater equipment, wherein thermophilic bacteria collected from seawater are fixed and dried on a carrier made of a porous material in the form of fine powder. 3. The antifouling / algae preventive agent for undersea equipment according to claim 1, which comprises chitin. 4. A crab, a shrimp or a small fish collected from the sea is subjected to high-temperature fermentation treatment, and then selectively propagated in an environment containing a large amount of flora and fauna to be controlled while enhancing the function of the target bacterial group. The target bacteria group is implanted on a carrier made of a porous material in the form of fine powder, and a binder or sizing agent is added to impregnate or impregnate the underwater installation device. Algae treatment method.