JP2802575B2 - Seaweed propagation method of revetment facilities - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for growing seaweed in seawall equipment such as a breakwater facility or Tetra Pot (registered trademark).

[0002]

2. Description of the Related Art The Ministry of Agriculture, Forestry and Fisheries has elucidated the ecosystem of seaweed communities inhabiting shallow waters several meters deep in the "Marine Launching Project" (implemented in fiscal 1983 to 1988), and has developed the possibility of artificial control technology. Indicated. For the formation and development of seaweed communities, techniques to promote the adhesion, settlement and growth of seaweed are required, and these have been studied mainly as measures to improve fish reefs.

[0003] On the other hand, in the private sector, there are cases in which nutrients are mixed into special resins for seaweed cultivation to form ropes or nets, or a paint for iron-ion propagation is applied to a concrete fish reef.

[0004]

However, in recent years, as the seawall facilities in coastal areas have been expanded, beach scoring has become a problem. This is because most of the revetment facilities are made of alkaline concrete, which pollutes the water quality of the sea area,
It is considered that the adhesion, settlement and growth of seaweed decreased, and the ecosystem changed significantly. Restoring coastal ecosystems is an important technical issue.

[0005] An object of the present invention is to provide a seaweed propagation method for seawall equipment which promotes the adhesion, settlement and growth of seaweed in seawall equipment in coastal areas where the above-mentioned sea burning is a problem, and restores ecosystems. That is.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the first invention relates to a method for growing seaweed in seawall equipment for growing seaweeds utilizing iron and iron compounds. A base containing at least one is interposed with a buffer between the base and the seawall equipment, and embedded so as to be exposed on the outer surface of the seawall equipment, so that seaweeds can be propagated. It is.

According to a second aspect of the present invention, in the first aspect, the base contains an iron chelate compound.

[0008]

According to the present invention, since a base containing at least one of iron and an iron compound is embedded so as to be exposed on the outer surface of the seawall equipment, the iron or iron compound dissolves as iron ions. As a result, the amount of dissolved iron gradually increases, which is taken up by seaweed and promotes the growth of seaweed. Furthermore, by embedding the base with a buffer material interposed between the base and the seawall equipment, the electrochemical reaction between the seawall equipment and the base is eliminated, and iron contained in the base and iron or the like are contained. The iron compound is stably dissolved in seawater for a long period of time, and there is no separation due to heat or external force distortion, and the fixing of the base to the seawall equipment is stable.

Further, by containing an iron chelating compound in the substrate, the release of iron is maintained for a long time in a form easily taken up by seaweeds, and the seaweeds are taken up by seaweeds and adhere to seawalls and settle thereon. , Growth is promoted.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment in which a substrate for growing seaweed according to the present invention is embedded in a seawall, and FIG.
(B) is a cross-sectional view taken along the line II of (A), FIG. 2 is another embodiment corresponding to FIG. 1, (A) is a plan view, (B) is I (I) of FIG.
FIG. 2 is a sectional view taken along line I-II.

In the first embodiment shown in FIG. 1, the base 2 is exposed so that the outer surface 6 of the base is exposed on the outer surface 5 of the revetment facility 1.
Is embedded with the buffer material 4 interposed. In the figure, reference numeral 7 denotes a concave portion. The revetment facility 1 includes a breakwater facility, a tetrapod, a block, a quay or a floating structure, and the material is made of concrete, gypsum, iron, an aluminum alloy, carbon, or the like. The base 2 contains iron or an iron compound or both iron and an iron compound, and the iron compound is an oxide, hydroxide or sulfide of iron, and is formed by molding powder of the iron or iron compound. It was done. The particle size of the powder is preferably from 1 μm to 1 mm, particularly preferably from 100 μm to 500 μm. Mixing is sufficiently possible with a usual kneader within this particle size range. When the particle size of the powder is less than 1 μm, the dispersibility when kneading with a kneading machine for molding is poor, and a good kneading state is not obtained. If the particle size of the powder exceeds 1 mm, the particles are too large, and the particles tend to be unbalanced, failing to achieve a good kneading state. The cushioning material 4
Rubber, plastic, and the like.

The cross-sectional shape of the base 2 may be circular, polygonal, or any other shape. In short, it suffices that the base 2 is easily embedded in the revetment facility 1 and is exposed on the outer surface 5 of the revetment facility. The substrate according to the first embodiment is cylindrical, and has a concave portion 7 at the center to increase the surface area of the outer surface 6 of the substrate. Therefore, a plurality of recesses 7 may be provided. When the size of the base 2 is cylindrical, the diameter is 1 mm to 5 mm.
It is preferable that the thickness is 00 mm and the thickness is 5 mm to 100 mm in terms of moldability and workability for embedding in seawall equipment, and other points.
mm is preferable. In the present invention, a plurality of such bases 2 are uniformly dispersed and embedded in the outer surface 5 of the seawall equipment.

In another embodiment shown in FIG. 2, the recess 7 in FIG. 1 is embedded so that the outer surface 8 of the iron chelate compound is exposed to the outside. Iron chelate compound 3
It contains the above-mentioned iron in the form of an iron chelate compound. Further, the iron chelate compound is contained in a capsule using a polymer such as calcium alginate or polyvinyl acetate and encapsulated. As the form of the iron chelate compound, a compound obtained by chelate-bonding divalent iron with EDTA or BPDS (vasophenanthroline) is used. The particle size of the capsule is in the range of 10 μm to 1 mm, as in the case of limiting the particle size range of the iron and iron compound of the base 2 described above.
A range of 500 μm is good. Other configurations are the same as those of the first embodiment of FIG. 1, and therefore, the same portions are denoted by the same reference numerals and description thereof will be omitted.

By the way, the technical problem of the substrate 2 containing iron is to optimize the shape and size of the substrate. To optimize the chemical forms of iron and iron compounds of the substrate (divalent and trivalent iron, oxides, sulfides, etc.) Object, hydroxide) Substrate embedding method (selection of buffer material) A substrate surface treatment method and the like are solved in the present invention by the configuration described above.

The substrate 2 having the above-described structure operates as follows. First, in order to prepare a growth environment for seaweed, it is necessary that the iron component be eluted by ionization or the like. Since the base 2 of the present invention exposes its outer surface 6 to the outer surface 5 of the seawall equipment so as to come into contact with seawater, iron, iron compounds, etc. contained in the base 2 easily elute as iron ions. . On the other hand, in the photosynthetic reaction of seaweed, iron is an essential element as a component of the electron transfer system and a component of various oxidoreductases, and is an important factor for the growth of seaweed. Therefore, if the environment for incorporating iron into seaweed is improved in this way, the substrate 2
The adhesion of the seaweed to the surface is stably performed, and the growth of the seaweed is increased.

Further, since the base 2 is attached to the revetment facility 1 via the cushioning material 4, the electrochemical reaction between the revetment facility and the base 2 is eliminated, and the iron contained in the lot is removed. The iron compound is stably dissolved in seawater for a long period of time, and there is no separation due to distortion due to heat or external force, and the fixing of the base 2 to the seawall equipment is stable.

Next, as shown in FIG.
Is embedded in the central concave portion 7 of the base 2 to operate as follows. That is, since the iron, the iron compound and the iron chelate compound 3 in the base 2 are all exposed to seawater, the iron and iron compounds in the base 2 elute the trivalent iron ions, and the iron chelate compound 3 or other The iron reduction promoting substances such as EDTA, sulfide compounds, tannic acid, phytoplankton, etc. reduce the ferric iron to ferrous iron and increase the dissolved iron, thereby increasing the growth of seaweed. Humic substances coprecipitated on the surface of iron oxide are also involved in the reduction reaction.

On the other hand, near neutral, iron is hardly soluble in water, but bacteria, blue seaweed, fungi, etc. produce and take in iron chelators. When various iron-type substances are added to the green seaweed Dunaliella sp., The proliferation ability becomes Fe, Fe-EDT.
A has a large effect, and FeCl ₃ has no effect. Seaweed greatly affects the form of iron or iron compounds, and chelating compounds and iron supplementation are effective for growth characteristics. Therefore, by exposing and embedding the substrate 2 containing the iron chelate compound on the outer surface 5 of the revetment facility as in the present embodiment, the reduction reaction of iron is promoted and the growth of seaweed is increased.

As an example where divalent iron is effective for growing seaweed,
An abnormal occurrence of phytoplankton was confirmed off the coast of Peru, but 40% of the dissolved iron in the marine area was dissolved as divalent iron ions. There are two possible reasons for this. One is that the lower seawater (which contains a large amount of divalent iron ions) in anaerobic conditions comes up. The second is that surface seawater exists thermodynamically as trivalent iron ions, but trivalent is reduced to divalent by a photoreduction reaction.

The present invention is not limited to the above-described embodiment. For example, particles containing at least one of the above-mentioned iron and iron compound and particles obtained by encapsulating particles of an iron chelate compound are added to a paint and dispersed. Alternatively, the paint containing the paint contained in the base 2 may be embedded in the revetment facility.

As described above, the present invention is an application of the mechanism for increasing the growth of seaweed. By applying the above technical means, it is possible to arbitrarily control the dissolved iron component in any environment. Thereby, the optimization realization of the growth increasing environment is obtained.

[0022]

As described above, according to the first aspect of the present invention, the base containing at least one of iron and an iron compound is embedded and provided so as to be exposed on the outer surface of the seawall. , Iron or an iron compound dissolves as iron ions, and the dissolved iron gradually increases, thereby increasing the growth of seaweeds and restoring the ecosystem. Further, by embedding the base with a buffer material interposed between the base and the seawall equipment, the electrochemical reaction between the seawall equipment and the base is eliminated, and the iron in the base is dissolved in seawater. Is stable for a long period of time, and there is no separation of the substrate due to distortion due to heat or external force, and the fixing of the substrate to the seawall is stabilized.

According to the second aspect of the present invention, in the first aspect of the present invention, since the substrate contains an iron chelate compound, in addition to the above-mentioned effects, a reduction reaction of iron ions is promoted and an iron form easily taken up by seaweeds. By releasing the iron component, and further encapsulating the iron chelate compound, the reduction reaction of iron ions is continued gradually over a long period of time, and the adhesion, settlement and growth of seaweed on seawall facilities are promoted.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which a substrate for growing seaweed according to the present invention is embedded in a seawall, and FIG.
(B) is a sectional view taken along line II of (A).

2A is a plan view and FIG. 2B is a cross-sectional view taken along line II-II of FIG. 1A in another embodiment corresponding to FIG.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 seawall equipment 2 substrate 3 iron chelate compound 4 buffer material 5 outer surface of seawall equipment 6 outer surface of substrate 7 recess

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) E02B 3/04-3/06 A01K 61/00 311 E02B 3/14

Claims (2)

(57) [Claims] Claims: 1. A seaweed growing method for a seawall using iron or an iron compound to grow seaweed, comprising the steps of: forming a base containing at least one of the iron and the iron compound on the base and the seawall. A seaweed propagation method for seawall equipment, characterized in that seaweed is grown by embedding and interposing a buffer material therebetween so as to be exposed on the outer surface of the seawall equipment. 2. The method according to claim 1, wherein the substrate contains an iron chelate compound.