JPH11179327A - Method and apparatus for treating jellyfish - Google Patents

Abstract

PROBLEM TO BE SOLVED: To treat jellyfishes without discharging waste by keeping recovered jellyfishes in a closed container for several days under anaerobic conditions and dissolving/liquefying the jellyfishes almost completely. SOLUTION: Part of jellyfishes and others recovered from sea by a screen and others are charged with seawater by a jellyfish charging apparatus constituted from a belt conveyer and others into a proper dissolution tank 20, mixed with anaerobic bacteria contained in a kind of activated sludge after sewage treatment as required, and kept for about three days. After that, the jellyfish and others are dissolved/liquefied by the anaerobic bacteria, a gas recovered from the tank 20 by a deodorization mechanism 26 which is a deodorization apparatus is subjected to deodorization treatment and discharged, and a dissolving solution after the treatment is made to meet drainage standards and discharged. By this process, dissolution treatment can be attained in a short time without discharging waste.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jellyfish processing method and apparatus, and more particularly to a jellyfish processing method and apparatus using a portable processing container capable of maintaining anaerobic conditions.

[0002]

2. Description of the Related Art In a plant facility such as a power plant which is located in a seaside area and requires a large amount of seawater, a large amount of jellyfish is concentrated in a short period of time, and the jellyfish is captured by a screen of an intake port. Although collected, the treatment of large amounts of collected jellyfish is a troublesome problem. In addition, the occurrence of such a large amount of jellyfish cannot be accurately predicted at the place and time, and a mobile response is required.

[0003] A conventional jellyfish processing apparatus is disclosed in Japanese Patent Application Laid-Open No. 60-1558.
As disclosed in Japanese Patent Application Laid-Open No. 11-37, Japanese Patent Application Laid-Open No. 5-3769, etc., the treatment is performed at a high temperature of 80 ° C. or more in order to dehydrate and reduce the volume in a short time. Therefore, utilities such as high-temperature water or steam and heat source equipment for supplying them are required. In addition, since it is composed of a dynamic device such as a crusher and a pump, it is weak against foreign matter other than jellyfish, and often causes trouble.

As disclosed in Japanese Patent Publication No. 57-46909, jellyfish is decomposed and liquefied by using an acid or an alkali. However, in addition to problems such as anticorrosion and post-treatment of an acid and an alkali, this method is also required. It is essential to raise the temperature above 80 ° C. Further, as described above, despite the very short period of use of the apparatus, the scale becomes large, the construction cost and the operation cost become relatively high, and this is a great obstacle to actually introducing the processing equipment.

[0005]

Accordingly, in order to minimize the need for maintenance and to provide mobility, it can be simply used as a temporary device at a necessary place when necessary, and can be disposed of. The challenge is to develop methods and devices that can reduce objects as much as possible. An object of the present invention is to develop a technique for treating such a large amount of jellyfish easily and with little waste.

[0006]

As a result of various studies, the present inventors have found that the collected jellyfish are kept under anaerobic conditions in a closed container for several days, thereby preventing the emission of offensive odors and preventing anaerobic bacteria. Knows that jellyfish can be dissolved, liquefied and treated almost completely by the action of the present invention, and the present invention has been completed.

The present invention is as follows. (1) A jellyfish treatment method characterized by liquefying a received jellyfish by holding the jellyfish under anaerobic conditions.

(2) A jellyfish treatment apparatus comprising a plurality of containers capable of holding anaerobic conditions, a mechanism for charging collected jellyfish into the containers, and a drainage mechanism for draining the containers. (3) The jellyfish treatment apparatus according to the above (2), wherein the container is portable.

(4) The jellyfish treatment apparatus according to the above (2) or (3), further comprising a mechanism for introducing an antifoaming agent into the container. (5) The jellyfish treatment apparatus according to any of (2) to (4), further including a deodorization mechanism for performing a deodorization process on the gas collected from the container and exhausting the gas.

(6) The jellyfish treatment apparatus according to any one of the above (2) to (5), further comprising a mechanism for stirring the contents put into the container. (7) A container capable of holding anaerobic conditions, into which organisms to be treated such as jellyfish are charged, a defoaming agent charging mechanism for the container, and a deodorizing mechanism for performing a deodorizing process on the gas recovered from the container and exhausting the gas. An apparatus for treating living things to be treated, such as jellyfish, comprising:

[0011] Furthermore, since the mass production of jellyfish is uncertain and the period is limited to a very short period throughout the year, a system structure that takes measures to save labor as much as possible and that is portable and saves space during storage is taken into account. Knowing that a jellyfish processing technology that can be economically put into practical use will be realized.
The present invention has been completed.

According to a preferred embodiment of the present invention, a portable "dissolving tank" which can be compactly stored during storage, and dissolves and liquefies jellyfish with airtightness during use, and further shortens the processing time It is composed of an "attached device unit" in which a stirring blower for cleaning and other auxiliary deodorizing devices and defoaming devices are installed on a common stand.

The collected organisms treated by the present invention are typically jellyfish, but also include organisms that occur in large quantities in season, such as mussels and small fish.

[0014]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a processing flowchart of the jellyfish processing method according to the present invention.

In the figure, jellyfish or the like collected from a seawater by a screen or the like is used as it is by a jellyfish feeding device unit 10 composed of a belt conveyor or the like, together with a part of the seawater without performing any processing such as drying and cutting. The anaerobic bacteria are charged into the container 12 and maintained under anaerobic conditions, for example, for about 3 days to dissolve and liquefy by the action of anaerobic bacteria. A stirrer or stirring blower may be provided to increase the processing speed.

The liquefaction of jellyfish under such anaerobic conditions is considered as follows. That is, jellyfish are 97%
Is water, and the remaining 3% solids are proteins and fats. Therefore, when this is decomposed in the presence of an anaerobic bacterium, it is decomposed into a gas with an odor such as hydrogen sulfide or mercaptan.

Therefore, according to the present invention, the container is a sealed container, and after the jellyfish is charged, the container is sealed and, if necessary, anaerobic bacteria (for example, anaerobic bacteria contained in activated sludge after sewage treatment) are added. Or may be present. However, since anaerobic bacteria exist everywhere under normal conditions, it is sufficient to simply maintain the anaerobic conditions unless particularly required. In order to positively realize anaerobic conditions, it is only necessary to evacuate or replace the air in the container. Conditions are formed.

As jellyfish are dissolved under such anaerobic conditions, gas such as hydrogen sulfide is generated, but this gas cannot be released to the atmosphere because of its odor. It is preferable to use it to deodorize and then release it to the atmosphere.

Furthermore, since foam may be generated with dissolution of jellyfish under anaerobic conditions, an antifoaming agent such as silicone may be added if necessary. After the jellyfish breaks down and liquefies, it separates from the gas and drains the liquid.

FIG. 2 is a conceptual diagram of a jellyfish processing apparatus according to the present invention. The jellyfish processing apparatus according to the present invention will be described with reference to the illustrated example. A dissolving tank 20, which is a container capable of holding anaerobic conditions, and a charging mechanism for charging jellyfish collected therein, for example, a charging apparatus such as a chain conveyor 22 and a piping system 24 constituting a drainage mechanism from the dissolving tank 20. Although not shown, a plurality of dissolving tanks 20 are provided, and jellyfish are sequentially put into them. The specific structure of these containers is not particularly limited as long as they are of a closed type and can maintain anaerobic conditions. To provide mobility, the container is preferably portable, i.e., assembled or mounted on a trolley. The container itself only needs to be able to hold the anaerobic condition simply as a closed structure. Therefore, the structure does not particularly require strength, and the same effect can be obtained by providing many small containers even if they are not large containers. The material can also be made of plastic.

According to a preferred embodiment of the present invention, the dissolving tank 20
A deodorizing mechanism 26, which is a deodorizing device for performing a deodorizing process on the gas collected from the container and exhausting the gas, a stirring mechanism, for example, a stirring blower 28 and / or a stirrer 30, and a defoaming mechanism for adding a defoaming agent May be further provided.

While the contents are kept in a closed container, the contents may be allowed to stand still. However, in order to promote the decomposition reaction under anaerobic conditions, it is preferable to provide appropriate stirring means. As such a stirring means, for example, mechanical stirring using a stirring blade, or stirring using a stirring blower that forms a circulating flow with the outside of the melting tank can be considered.

As described above, according to the present invention, simultaneous or sequential use at a plurality of places becomes possible by installing as temporary equipment without permanently installing excessive facilities in view of the frequency of use. In addition, the capacity and quantity of the “dissolution tank” and “attached equipment unit” can be arbitrarily set according to the processing amount, so that the processing capacity can be increased after the introduction of the equipment and the equipment can be flexibly upgraded even when the equipment is renewed. Since the equipment is easy to assemble and disassemble, significant reductions in both construction and operating costs can be expected. Next, the operation and effect of the present invention will be specifically described based on examples.

[0024]

EXAMPLE 1 About 30 liters of moon jellyfish were charged into a dissolving tank having an internal volume of 40 liters and sealed. The sample was allowed to stand for 3 days, and the gas generated during that period was collected and analyzed. On the other hand, the contents of the melting tank
After the passage of days, it was almost dissolved and liquefied, and a white precipitate was slightly observed at the bottom. In addition, in the same test performed by providing a stirring device in the dissolution tank, it was confirmed that this precipitate was further reduced.

After the test, the dissolved liquid was taken out and analyzed for BOD, COD and SS. The results are summarized in the table below.

[0026]

[Table 1]

Embodiment 2 FIG. 3 is a schematic perspective view of a processing facility according to the present invention for processing a large amount of jellyfish collected by a rotary screen provided at a water intake of a power plant.

According to the illustrated example, the collected jellyfish are conveyed through a trough 40 and sequentially put into a melting tank 44 by a conveyor 42. A total of four dissolving tanks 44 are provided. This is a cylindrical container provided with a stirrer 45 and made of a plastic material.
46, a defoaming agent input port 48, and a gas recovery port 50 are provided so that an airtight state can be maintained as a whole. The dissolving tank 44 only needs to be able to hold jellyfish mixed with seawater under anaerobic conditions, so that it can have a simple structure in terms of strength, and in some cases, it can be assembled on the spot or mounted on a bogie. You may. The illustrated example is an assembly type. The liquid after the treatment is returned to the water intake channel 52 through the drainage system 51.

From the results of experiments in the laboratory, it has been confirmed that the jellyfish dissolves and liquefies within 3 days. Therefore, if the capacity of the dissolution tank is set to be the processing amount per day, a total of four dissolution tanks are prepared. However, this can be used sequentially and repeatedly. Since the solution after treatment is diluted with a large amount of seawater flowing through the intake channel, the drainage standard at the outlet of the facility can be sufficiently satisfied.

If necessary, by circulating the gas inside the dissolving tank with a stirring blower and stirring the jellyfish, the dissolving time can be shortened. In addition, mechanical stirring is used at the time of jellyfish injection,
Disintegration time can also be reduced by shredding jellyfish. In addition, air bubbles generated in the initial stage of dissolution can be dealt with by automatically adding a defoamer, and odor gas generated during the dissolution process is released through the deodorizer if the internal pressure of the dissolution tank increases. Therefore, there is no effect on the surroundings.

[0031]

According to the present invention, the following effects can be obtained. The jellyfish that is generated in large quantities in a short period can be effectively treated. Maintenance costs are low because they only need to be used when necessary. The processing device is easy to store when not in use. Even if foreign matter is mixed, the operation is not hindered and the operation is simple. It does not scatter odors around and does not emit bubbles and the like outside the device. Labor saving of work can be achieved.

[Brief description of the drawings]

FIG. 1 is a processing flowchart of a jellyfish processing method according to the present invention.

FIG. 2 is a conceptual diagram of a jellyfish processing apparatus according to the present invention.

FIG. 3 is a schematic perspective view showing an embodiment of a jellyfish processing apparatus according to the present invention.

Claims (7)

[Claims] 1. A jellyfish treatment method comprising liquefying a received jellyfish by maintaining the jellyfish under anaerobic conditions. 2. A plurality of containers capable of holding anaerobic conditions,
A jellyfish treatment apparatus comprising: a mechanism for charging jellyfish collected in the container; and a drainage mechanism for draining the container. 3. The jellyfish treatment apparatus according to claim 2, wherein said container is portable. 4. The jellyfish treatment apparatus according to claim 2, further comprising a mechanism for introducing an antifoaming agent into the container. 5. The jellyfish processing apparatus according to claim 2, further comprising a deodorizing mechanism for performing a deodorizing process on the gas collected from the container and exhausting the gas. 6. The jellyfish treatment apparatus according to claim 2, further comprising a stirring mechanism for stirring the contents charged in the container. 7. A container capable of maintaining an anaerobic condition, into which an organism to be treated such as jellyfish is charged, a defoaming agent charging mechanism for the container, and a gas recovered from the container is subjected to a deodorizing treatment and exhausted. An apparatus for treating living things to be treated, such as jellyfish, having a deodorizing mechanism.