JPH0356199A - Improving method for water quality - Google Patents

Abstract

PURPOSE:To contrive an improvement of water quality through prevention of oxygen deficiency by arranging diffuser pipes in an underwater construction, wherein underwater inhabitants live, installing a blower and a solar power generation equipment at a site above the water and sending air to the diffuser pipes so as to aerate the inside of underwater construction. CONSTITUTION:A porous underwater construction 80, wherein underwater inhabitants live, is arranged under the water and quipped with diffuser pipes 10 in it. Furthermore, a solar power generation equipment consisting of solar panels 30 is installed as a power source of a blower 20, which is connected to the diffuser pipes 10 by an air hose 40. The air, which is ejected from the diffuser pipes 10 by driving the blower 20, passes through clearances of the porous underwater construction 80 and makes a surrounding environment aerobic. An environment of good water quality is, therefore, formed through promoted decomposition of egesta by air bubbles, promoted rate of organic substance incorporation by living things adhering to the underwater construction 80 and food chains.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention can be applied to water quality improvement in lakes and sea areas where red tide phenomena and blue tide phenomena are likely to occur, and in various aquaculture facilities that require water quality improvement. Regarding improvement methods.

<Prior art> In general, red tide phenomenon occurs due to abnormal proliferation of plankton, and green tide phenomenon occurs when a clear thermocline forms near the water surface of a stagnant water area and vertical mixing of water disappears, resulting in no water at low levels. (Poor) Oxygen is known to occur when an ice mass develops and this ice mass upwells.

When a red tide phenomenon or a blue tide phenomenon occurs, it causes great harm to the ecosystem, such as the death of underwater organisms due to lack of oxygen.

Currently, the following two methods are known as methods for improving water quality.

(1) An aeration method that forcibly sends air into the water to increase the amount of dissolved oxygen and improve water quality.

(2) A method of installing habitat facilities underwater and using the food chain of aquatic organisms to improve water quality.

<Problems to be Solved by the Present Invention> The conventional water quality improvement methods described above have the following problems.

<B> Regarding the aeration method, maintenance costs are enormous due to the large size of onshore oxygen supply equipment and high wiring and equipment costs, and the use of onshore electricity to continuously operate the aeration equipment. Become something.

Furthermore, since the equipment is fixed, it can be applied to specific limited water areas, but it is not suitable for improving water quality in arbitrary water areas or wide areas.

<Mouth> The improvement method using the food chain of aquatic organisms is
When a large amount of aquatic organisms adheres to an area and the area becomes overcrowded, the relationship in the food chain is disrupted due to the death of the aquatic organisms and large amounts of excrement, so that little improvement in water quality can be expected.

Furthermore, it is difficult to maintain and manage a good environment (aerobic environment) for a normal food chain over a long period of time.

Furthermore, it takes a long time before water quality improvement effects are seen.
Lack of immediate effect.

Furthermore, the water area where red tide or blue tide phenomena occur becomes an environment in which it is difficult for aquatic organisms to live (anaerobic environment), so there is the problem that the water quality improvement effect decreases significantly during the period when such phenomena occur. be.

<Objective of the present invention> The present invention was made to solve the above-mentioned problems, and an object of the present invention is to provide the following method for improving water quality.

<A> Water quality improvement method that is effective in resolving sudden water quality deterioration such as red tide and blue tide phenomena.

<Mouth> A water quality improvement method that can be applied to any water body or wide area.

<C> Water quality can be improved in a short period of time and economically.
How to improve water quality.

<2> A water quality improvement method that improves water quality improvement efficiency during the summer when water quality is most likely to deteriorate.

<E> A water quality improvement method that can maintain the water quality improvement function for a long period of time.

The purpose is to provide a method for improving water quality.

<Means for Solving the Problems> That is, the present invention provides a porous underwater structure that is a habitat for underwater creatures, and also arranges an air diffuser pipe with air permeability inside the underwater structure. The present invention also relates to a method for improving water quality, in which a blower for supplying air to an aeration pipe and solar power generation equipment for powering the blower are installed on the water side, and the water quality is improved by continuous aeration within an underwater structure.

<Configuration of the present invention> The present invention will be explained below.

<B> Basic equipment for improving water quality Figure 1 shows a conceptual diagram of the system for improving water quality.

In the present invention, an air diffuser 10 having ventilation properties, a blower 20 for supplying air to the air diffuser 10, and a solar panel 30 serving as a power supply means for the blower 20 are used.

The air diffuser 10 is a perforated pipe that releases air underwater, and can be moved to any position for use.

The air supply hose 40 is connected between the air diffuser pipe 10 and the above-water blower 20.

In the present invention, the solar panel 30 converts solar radiant energy into electrical energy, and the blower 20 is driven by this electrical energy.

The blower 20 may be driven via the A/D converter 50.

Therefore, unlike conventional aeration methods, there is no need to use a land-side power source.

Also, if it is necessary to operate the blower 20 at night,
It is preferable to provide power storage equipment 60 such as a battery.

Furthermore, the blower 20 may be configured to be combined with a temperature sensor 70 and a dissolved oxygen amount measurement sensor 71 so that the blower 20 automatically operates when the water temperature or dissolved oxygen amount reaches a set value.

In order to automatically operate the blower 20, it is necessary to set in advance data on the water temperature and dissolved oxygen amount when, for example, signs of red tide or blue tide appear.

In this way, if any signs of red tide or blue tide are observed, the blower 20 will automatically operate to prevent water quality from deteriorating.

Further, the air bubbles released from the air diffuser 10 and floating form an upward water flow.

This rising water flow helps eliminate the so-called "thermocline" that occurs near the water surface, which is considered to be one of the causes of water quality deterioration.

<Exposure> Combination with underwater structure FIG. 2 shows an installation example in which a diffuser pipe 10 is combined with a porous underwater structure 80 composed of a large number of porous blocks.

If the underwater structure 80 is used alone in a stagnant water area, the area around the underwater structure 80 may be damaged due to excessive attachment of aquatic organisms peculiar to contaminated water areas, lowering the amount of dissolved oxygen, and accumulation of rotten matter. An anaerobic environment is expected.

Therefore, if the flexible and pressure-resistant air diffuser 10 is installed inside the underwater structure 80, the air released from the air diffuser 10 will pass through the gaps in the porous underwater structure 80, and the underwater structure The entire area around object 80 is made into an aerobic environment.

Therefore, even in stagnant waters, the air bubbles released into the water promote the decomposition of organic matter such as excrement deposited on the bottom of the water.
Since the activity of the underwater organisms attached to the underwater structure 8o is increased and the rate of uptake of organic matter by the organisms is accelerated, a good water quality environment is formed.

If the water quality environment around the underwater structure 80 is good, the effect of attracting octopus from underwater creatures will also be promoted.

In this way, when the aeration pipe 10 and the underwater structure 80 are combined, the effect of improving water quality through the food chain of aquatic organisms,
The water quality improvement effect of aeration is synergistic.

<Example 1> FIG. 3 shows an embodiment of the present invention.

In this embodiment, a solar panel 30 is installed on the land side.

A blower 20 on the land side and a plurality of air diffuser pipes 10 installed in an underwater structure 80 are connected by an air supply hose 40.

This embodiment is suitable for improving water quality in water areas that are relatively close to land and have no power transmission lines.

By configuring the solar panel 30 of this embodiment as a roof material, it can also be used as a rest facility.

<Example 2> Fig. 4 shows an example in which a part of the water quality improvement facility is floated on water.

A floating structure 90 has a solar panel 30 and a light beacon 91 on the top exposed above the water surface, and is moored to a heavy sinker 92 dropped at an arbitrary position.

The floating structure 90 accommodates a blower (not shown) inside.

The air supply hose 40 connects between the blower and the air diffuser pipe.

According to this embodiment, even in a body of water far away from land, a power source for the blower can be secured without requiring a power source on land.

<Example 3> FIG. 5 shows an embodiment for effective use of electric power.

The fact that the blower 20 is built into the floating structure 90 is similar to the embodiment described above, but this embodiment is different from the embodiment 2 described above in that the floating structure 90 includes a water tank 93 and a water pump 94. differ.

In this embodiment, air is sent from the blower 20 to make the water in the water tank 93 rich in dissolved oxygen, and the oxygen-rich water in the water tank 93 is transferred to the water bomb 94 and the water hose 95.
This is a system in which water is discharged into the underwater structure 80 at the bottom of the water through the water.

In this embodiment, the blower 20 and the water pump 94 are powered by the solar panel 30.

In this example, power consumption is lower than in the case of aeration in water for the following reason.

That is, since the water depth in the water tank 93 is approximately several tens of centimeters, the blower 20 may have a smaller capacity than when aeration is carried out at the bottom of the water.

By reducing the capacity of the blower 20, it is possible to reduce power consumption and downsize the solar panel 30.

Furthermore, since water supply requires only piping resistance, the power consumption of the water bomb 94 can be reduced.

The oxygen-rich water in the water tank 93 may be directly discharged into the underwater structure 80 using the water supply hose 95, or may be discharged from the aeration pipe 10 by connecting an aeration pipe.

Further, water in the water tank 93 is taken in from outside the floating structure 90 and replenished.

<Example 4> If the air diffuser 10 shown in Fig. 1 is installed on the bottom of the water in an arbitrary shape, an air curtain of air bubbles will be formed over the entire length of the air diffuser 10, and this can be used as a cultivation cage. You can also do it.

In the case of this example, in order to supply air continuously day and night,
It is necessary to use the power storage equipment 60 together.

<Effects of the present invention> According to the present invention, the following effects can be obtained.

<B> By aerating inside underwater structures that are habitats for underwater creatures, it is possible to prevent a decrease in the amount of dissolved oxygen inside and outside the underwater structures, and at the same time, it is possible to promote the decomposition of putrefying substances.

Particularly in the summer when water quality continues to deteriorate, a water area that has deteriorated will have a great water quality improvement effect, and a water area that is in good condition can prevent the deterioration of water quality.

<Mouth> It is possible to maintain an aerobic environment around the underwater structure.

Therefore, the activity of aquatic organisms is increased, and the effect of improving water quality is promoted.

In particular, the floating bubbles prevent the vertical water flow, eliminating the thermocline, and also prevent the formation of oxygen-poor (non-)ice ice blocks at low levels, making it effective as a preventive measure against the blue tide phenomenon. do.

<C> By incorporating power generation facilities, blowers, etc. into floating structures, they can be moved to any water body and improve water quality.

(2) Since it uses the sun's radiant energy to generate electricity, there are no running costs.

Moreover, water quality can be improved even in offshore areas where power transmission is impossible.

<E> When used in conjunction with electricity storage equipment, it becomes possible to continuously release air, which can be used for multiple purposes such as aquaculture, seaweed beds that breathe late at night, etc.

[Brief explanation of drawings]

Figure 1 2 Conceptual diagram of the system of the water quality improvement method of the present invention Figure 2: Explanation of a combination of underwater structures and air diffusers Figure 3: Figure 4: Figure 5; Implementation with power generation equipment and blowers deployed on land An explanatory diagram of Example 1. An explanatory diagram of Example 2, in which power generation equipment and a blower are incorporated into a floating structure on the water.

Claims (1)

[Claims] (1) In addition to installing a porous underwater structure that is a habitat for aquatic creatures underwater, a ventilation pipe with ventilation is placed inside the underwater structure, and a blower is installed above the water to supply air to the aeration pipe. A water quality improvement method that involves deploying solar power generation equipment to power the blower, and continuously aerating inside an underwater structure to improve water quality.