KR101802607B1 - Device for collection of sludge of biofloc - Google Patents

Device for collection of sludge of biofloc Download PDF

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Publication number
KR101802607B1
KR101802607B1 KR1020150159600A KR20150159600A KR101802607B1 KR 101802607 B1 KR101802607 B1 KR 101802607B1 KR 1020150159600 A KR1020150159600 A KR 1020150159600A KR 20150159600 A KR20150159600 A KR 20150159600A KR 101802607 B1 KR101802607 B1 KR 101802607B1
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South Korea
Prior art keywords
collecting
water
sludge
water tank
breeding
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KR1020150159600A
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Korean (ko)
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KR20170056221A (en
Inventor
이규태
임세진
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주식회사 네오엔비즈
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
    • A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/2433—Discharge mechanisms for floating particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D21/00—Separation of suspended solid particles from liquids by sedimentation
    • B01D21/24—Feed or discharge mechanisms for settling tanks
    • B01D21/245—Discharge mechanisms for the sediments
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

Abstract

The present invention relates to a water tank for storing biofloat breeding water having a bottom and an outer wall of a predetermined area, a breeding water infusion tube installed at one side of the water tank for supplying breeding water from the bioflag breeding water tank to the water tank, A breeding water collection pipe installed at an upper side of the water tank for recovering breeding water from which bioflare sludge has been removed from the water tank, a breeding water recovery pipe installed horizontally along the inner wall surface of the water tank wall, A collecting plate which is installed above the water collecting pipe, a collecting plate which is fixedly mounted on the collecting plate, and collects the bioflare sludge accumulated on the water collecting tank, Provides biofloat sludge collection unit that facilitates biofloacking and recycling resources The.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to bioflavonoid sludge collecting apparatuses,

The present invention relates to a bioflare sludge collecting apparatus, and more particularly, to a bioflag sludge collecting apparatus, which collects biofloating sludge from a bioflocculating sludge, The present invention relates to a bioflocco-style sludge collecting apparatus which can easily collect and use only floc sludge.

Korea's marine aquaculture can be classified into marine cage culture, onshore water tasting and festival ceremony, except for inland water culture. Of these, marine caged aquaculture is the largest and the supply of fish is also the largest. However, in the case of marine cage culture, there are many factors that can not be controlled, such as typhoons, high temperature or low temperature, which are highly influenced by the natural environment. On the other hand, land-based aquaculture has little impact on the natural environment while cultivating on land or indoors, and is easy to control factors such as water temperature, dissolved oxygen, water quality and disease.

However, on-shore aquaculture is difficult to raise in the case of sea-aquaculture, and in the case of continual return of breeding water, it is costly to sterilize or filter, or if filtration is not done properly, it is exposed to harmful bacteria and virus inflow There was difficulty. Therefore, a recirculating aquaculture system (RAS) for filtrating and reusing the reared water and a Shallow Raceway System (SRS) for constantly feeding the reared water in a multi-layer water tank have been developed in the aquacultural aquaculture system. Biofloat technology, which is capable of decomposing pollutants and cultivating beneficial microorganisms in fish culture tanks with fish, has gained popularity in recent years.

BioFloc Technology is a microbiological and microbiological culture of heterotrophic bacteria and autotrophic bacteria (autotrophic bacteria) without a water treatment system, It is necessary to remove harmful substances in the breeding water by decomposing harmful substances such as ammonia in the water or converting them into other types of organic matter that can be consumed by the aquaculture fish, and then the water treatment process such as water reversion, filtration, biological treatment, aeration, It refers to a method that is not necessary.

Using biofloat technology, organic matter can be degraded about 10 to 100 times faster than algae degradation, which makes it possible to keep the water quality suitable for aquaculture. In addition, this technology can create a closed breeding system that can prevent the inflow of viruses, pathogens and parasites, etc., by the return of water during the aquaculture process, so that it can control the viral infection, etc., and the use of antibiotics It can be dramatically reduced. It is also possible to produce aquaculture regardless of the season, because the aquaculture facility can control the environmental conditions and cultivate the aquaculture.

Biofloat technology, which can continuously produce environmentally friendly and clean food, is currently expanding its target species with white prawns, eels, yellow pheasant, mudfish and nidan koi, and it can supply eco- It also contributes to the income increase of the farm household.

As described above, the aquaculture using biofloat technology can increase the yield by densely packed breeding, prevent disease damage, facilitate the management of water quality in breeding water, and have a high feed efficiency, It takes time for microbial settlement suitable for cultured fish species and environment, increases oxygen supply for microorganisms and aquaculture fish, and it is necessary to control titratable acidity of breeding water. In particular, biofloat particles are adsorbed on the surface of the bubbles and accumulate and accumulate on the surface of the bubbles.

FIG. 1 is a photograph showing a biofloccullery sludge produced in a biofloat technique. Although bioflavonoids are degraded by microorganisms and reduced to breeding water, if they are not removed at an appropriate concentration level, bioflavonoids will form a thickly packed cake on top of the breeding water, which is disadvantageous in the cultivation process. In other words, the amount of oxygen input is reduced by reducing the surface area of the water in contact with the atmosphere, and it prevents the phytoplankton, the autotrophic bacteria, and the fish from being exposed to the light of appropriate illumination. In addition, the inside of the cake may become a potential source of disease such as an anaerobic environment is formed and decayed. Therefore, bioflavon sludge has been removed and removed in order to manage the aquaculture in the bioflavon farm. In this process, the management cost has increased.

In recent years, the results of analyzing the components of biofloat sludge have been revealed. Biofloccul sludge has been widely used as a feedstock for a variety of crops such as feed residue, photosynthetic bacteria, attached algae, tagatophyte bacteria, phytoplankton, zooplankton, copepod, Protozoa, etc., and their carcasses, and more than 80% of them are organic. It contains 25 ~ 41% of crude protein and 20 ~ 30% of crude fat 2 ~ 3%, especially amino acids such as highly unsaturated fatty acids, carotenoids, phosphorus, methionine, lysine and arginine It has been shown that it contains a large amount of useful ingredients. These beneficiaries are increasing the likelihood that bioflavon sludge will be offered as a feed composition for aquaculture fish or as a feed additive to increase growth and immunity.

Therefore, it has been necessary to conduct studies to appropriately collect and utilize biofloat sludge which has been collected and discarded, because it has been generated in the conventional process and hinders efficient form.

In Korean Patent No. 10-1479840, an air stone is used which is composed of a circular water tank composed of a bottom portion and an outer wall of a water tank, a water pipe for use in a bottom portion of the circular water tank is installed, The water circulation pipe is provided with an inner circular pipe inside the outer circular pipe and the inner circular pipe and the outer circular pipe are connected to each other by a plurality of straight lines Discloses a culture water tank for a biofloat system in which a straight pipe is formed in a cross shape in an inner circular pipe. Korean Patent Registration No. 10-1508055 discloses a water tank body comprising a bottom portion having an open top and a predetermined area and a polygonal outer wall of the water tank; A water tank having a bottom and a polygonal outer wall having an open top and a predetermined area, The breeding water supply pipe is connected to the water tank body starting from the house collection; The breeding water discharged from the water tank body is connected to the water tank and the drain pipe; And the breeding water discharged from the auxiliary tank is connected to a plurality of pipes through collecting and collecting. Korean Patent Registration No. 10-1363623 discloses a flow generating unit for supplying excrement and breeding water of a first breeding species and flowing along a circular trajectory and a feedback tube for circulating and supplying breeding water flowing upward from the bottom center portion And a circulatory breeding ground using biofloat is disclosed. Korean Patent No. 10-1507057 discloses a method in which bioavailable water from biofloat aquaculture tank is combined with a plant cultivation system to utilize organic substances not degraded by microorganisms in aquaculture tank for plant cultivation, , Which can be recycled in the aquaculture tank, is constructed to enable internal recirculation of the water. Therefore, it is possible to produce aquatic organisms and agricultural plants without supplementation of separate breeding water, thereby making it possible to reduce production costs and maximize production efficiency. Bioflavon culture system. However, the present invention differs from the bioflag sludge collecting apparatus of the present invention in that it can collect and recycle the bioflactic sludge generated in the biofloat culture process.

In a biofloat culture in which microorganisms and aquaculture species are cultivated together so that bacteria can decompose organic byproducts in the aquatic organisms and convert the aquacultured fish into food that can be consumed and purify the water, The biofloat particles attached to the air bubbles and increased in flotation force rise up to the upper part of the biofloat breeding water to form a cake-like biofloat sludge, which is accumulated in the upper part of the bioflocculation water, And it prevents the light from permeating into the water, but it is not reduced to the rearing water again and it is corrupted in the anaerobic environment and obstructs the cultivation. However, it has been found that bioflavonable sludge contains a large amount of various useful substances required for aquaculture, and a method and apparatus for easily collecting and recycling it are needed. Accordingly, the present invention provides a collecting device for efficiently collecting sludge generated during a biofloacking process.

In order to solve the above problems, the present invention provides a bioflocculation apparatus comprising a water tank having a floor and an outer wall of a predetermined area and capable of receiving biofloat breeding water, a breeding tank provided on one side of the water tank, A water feed pipe for feeding air to the inside of the water tank, a feed water collection pipe installed at one side of an upper part of the water tank for recovering bioflavated sludge from the water tank, And a collecting plate which is horizontally installed and installed above the breeding water return pipe, a collecting plate which is seated on the collecting plate and which is capable of collecting bioflare sludge accumulated in the upper part of the water tank, A sludge collecting device is provided. In addition, the collecting plate is formed of a plurality of collecting part plates, and each collecting part plate can be folded to easily form and collect the bioflactive sludge, and the water tank is formed into a funnel shape to facilitate the collection of the precipitating sludge The bioflak sludge collecting device according to claim 1,

The bioflacture sludge collecting apparatus according to the present invention is an apparatus for collecting sludge generated during a biofloat culturing process. The apparatus collects and collects sludge continuously in biofloat breeding water, The bioflavon sludge can be easily recovered, processed, and recycled without using the conventionally used biofloat sludge. In addition, the bioflavonable sludge can be easily recovered, processed and recycled. It is possible to increase the efficiency of biofrost style and recycle resources.

FIG. 1 is a photograph showing bioflak sludge that appears during mass production of biofloat.
2 is an exploded perspective view of a bioflag sludge collecting device water tank according to the present invention.
3 is an exploded perspective view of a bioflash sludge collecting apparatus collecting plate according to the present invention.
FIG. 4 is a view showing a collection plate configuration of the bioflacture sludge collecting apparatus according to the present invention.
5 is an exploded perspective view of a bioflacture sludge collecting apparatus according to the present invention.

The present invention relates to a device for collecting sludge which occurs during the aquaculture process in a bioflocculation method. Most of the sludge generated during the biofloat cultivation process grows up into the upper part of biofloat breeding water along with the air bubbles generated from the breeding water in the breeding water, and is formed into a cake shape and is accumulated in the upper part of the biofloat breeding water. The sludge thus accumulated has the disadvantage of reducing the contact area with the air and obstructing the penetration of light into the breeding water.

However, recently, it has been confirmed that a large amount of useful components for aquaculture is contained in the sludge generated in the bioflavonery form, and it has been confirmed by the inventors of the present invention. Accordingly, the present invention has been accomplished in the process of collecting and recycling bioprolactic sludge that has been conventionally dumped as garbage. Hereinafter, the present invention will be described in detail with reference to specific examples. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

2 is an exploded perspective view of a bioflag sludge collecting device water tank according to the present invention. The present invention relates to a bioflocculation tank (100) having a floor and an outer wall of a predetermined area and capable of receiving biofloat breeding water, a breeding water infusion tube An air supply unit 160 for supplying air to the inside of the water tank 100, a water collection water collection unit installed at one side of the water pool 100 to recover biofloated sludge from the water tank, (110) horizontally installed along the inner wall surface of the wall of the water tank and installed above the rearing water return pipe (130), and fixed on the collecting tuck (110) And a collecting plate (200) capable of collecting the bioflakable sludge.

The breeding water is drawn from the bioflag water tank and the breeding water is injected into the bioflag sludge collecting device through the breeding water injection pipe 120. The breeding water injection process can be carried out through a pump or the like. In one embodiment of the present invention, the breeding water can be moved without using energy by using the water level difference in the water tank. In addition, a venturi tube (not shown) may be installed at the distal end of the breeding water injection tube 120 to simultaneously perform breeding water injection and fine bubble generation. As shown in FIG. 2, a bubble generator 170 for generating micro- Can be installed.

A collecting vat 110 is formed on one side of the upper wall of the water tub 100 so that the collecting plate 200 for collecting the bioflare sludge accumulated on the upper part of the water is placed and fixed on the water tub 100. It should be noted that the breeding water injection tube 120 and the air supply device 160 are structurally incompatible with the collection plate 200 and the collection tile 110 installed on the water tank 100 while being installed inside the bioflare sludge collection device A passage through which the breeding water injection pipe 120 and the air supply device 160 can be installed is formed on one side of the collection vest 110.

Biofloat sludge is formed on the breeding water surface of the biofloat sludge collecting device and 5 to 20 cm upward from the water surface. Therefore, the collection vest 110 is formed on the top of the bioflare sludge collection device so that the collection plate 200 can be placed under 10-20 cm of the breeding surface.

Biofloat sludge is collected on the breeding water surface of the biofloat sludge collecting apparatus while the sludge is removed. The biofloat breeding water is recovered to the biofloat breeding tank through the breeding water return pipe 130 formed on the upper side of the water tank 100 do. At this time, the breeding water return pipe 130 is formed below the location where the collecting vest 110 is formed on the wall surface of the water tank 100, thereby recovering the lower breeding water from which bioflare sludge has been removed.

On the other hand, the sludge generated during the biofloat culture process can be roughly divided into a part floated on the upper part of the breeding water and a part deposited on the bottom of the breeding water tank. When fine bubbles are sufficiently supplied in the breeding water by the air bubble generator, Most organic materials are trapped on the surface of the bubbles and float up like water bubbles. Through the same effect as the protein skimmer, most of the sludge is accumulated in the upper part of the water. However, biofloat agglomerates that can not be transported to the upper part and not participated in the rearing process may form sludge at the lower part of the bioflag tank.

The water tank of the bioflacture sludge collecting apparatus according to the present invention is formed into a funnel shape so that the sludge to be settled can be collected in the water tank 100, Collecting the sludge into the drain pipe 150 through the drain hole 140 and then collecting the sludge by regularly opening and closing the drain pipe valve 190. As described above, the present invention provides a bioflak sludge removing apparatus capable of collecting bioflakable sludge which can be settled on the floor as well as bioflakable sludge which is floated on the water bath 100.

3 is an exploded perspective view of the bioflash sludge collecting apparatus collecting plate 200 according to the present invention. The collection plate 200 may be formed of a plurality of collection part plates 270, and each collection part plate 270 may be foldable. In an embodiment of the present invention, the upper collecting plate 210 and the lower collecting plate 220 constituted of four collecting part plates 270 are formed.

The upper collecting plate 210 is formed with a fan-shaped part collecting plate 270 formed with a collecting plate hole 230 around the central part where the pulling column 280 is inserted, 270 is formed at the edge of the collecting wall 240 to prevent the bioflash sludge from being lost around the bioflash sludge in the process of collecting the bioflash sludge which is formed in the form of a cake on the top of the feeding water. In the lower part of the central part of the upper collecting plate 210, spaces for collecting and collecting the collecting part plates 270 of the lower collecting plate 220 are formed.

The lower collecting plate 220 is formed in a shape similar to the upper collecting plate 210 by forming a fan-shaped collecting part plate 270 around the pulling column 280. The pulling plate 250 is formed on the pulling column 280, So that the lower collecting plate 220 can be rotated.

The collecting plate 200 assembles the upper collecting plate 210 and the lower collecting plate 220 together. The handle column 280 of the lower collecting plate 220 is inserted into the through hole formed at the center of the upper collecting plate 210 and the thread of the handle 250 is formed on the thread formed at the end of the handle column 280. Further, the lower collecting plate 220 is brought into close contact with the lower part of the upper collecting plate 210, and then the central part is fixed with the fixing cap 260 to complete the assembly.

The assembled collecting plate 200 is placed on a collecting tuck 110 formed on the bioflag sludge collecting device, and after waiting until the bioflash sludge is formed at the upper part of the breeding water and sufficiently filled, the bioflash sludge is formed into a cake Collect biofloat sludge when loaded.

FIG. 4 is an illustration showing the configuration of the collection plate 200 of the bioflacture sludge collecting apparatus according to the present invention. The collection portion plate 270 of the collection plate 200 maintains the folded shape so that the biofloat sludge does not interfere with the formation of the biofloat sludge on the rearing water surface. When bioflacture sludge is accumulated on the breeding water surface to a certain thickness, the collecting part plate 270 is unfolded by turning the knob 250 as shown in FIG. 4, so that the collecting plate 200 can easily collect the bioflakable sludge Switch to the shape.

The collecting plate 200 is lifted upward from the bioflare sludge collecting device to collect the bioflacture sludge. In this process, since the breeding water flows down through the through holes 230 formed in the partial collecting plate 270, it is possible to shorten the use process such as drying the bioflakable sludge without removing the breeding water such as centrifugal separation . However, it may be necessary to carry out bioflavate sludge collected on the bottom of the water tank 100 and collected through the water pipe 150, such as centrifugation.

The collecting part plate 270 may be a plate-like plate having a through hole as in the embodiment of FIG. 3, and may be formed of a net having a mesh of a predetermined size. At this time, the manganese mesh is formed in such a size as not to lose biofloat sludge.

5 is an exploded perspective view of a bioflacture sludge collecting apparatus according to the present invention. The bioflacture sludge collecting device facilitates the collection of the bioflactive sludge which is installed by the support frame 180 so that the lower surface thereof is spaced apart from the ground to be settled through the drainage pipe.

The bioflacture sludge collecting apparatus according to the present invention is installed near the biofloack breeding tank to continuously collect and remove the sludge in the biofloack breeding water and return the remaining breeding water to the bioflag breeding tank, The present invention provides a device for easily collecting bioflavable sludge containing bioflavable sludge rich in useful materials in aquaculture and using the same.

The present invention relates to an apparatus for collecting sludge generated during a biofloat culture process, which is installed near a biofloat-type water tank, continuously collecting sludge from a bioflag-containing water, collecting the sludge, Biofloat can be easily recovered from Biofrock farm so that biofloack sludge can be processed and recycled without being used in the past. This can be used industrially because it can increase the efficiency of Biofrok style and recycle resources and contribute to the income of farmers.

100: water tank 110: collection tuck
120: Breeding water injection tube 130: Breeding water collection tube
140: Drain 150: Drain pipe
160: air supply unit 170: bubble generator
180: support frame 190: drain pipe valve
200: collecting plate 210: upper collecting plate
220: Lower collecting plate 230: Collecting plate clearance
240: collecting wall 250: handle
260: fixed cap 270: collecting partial plate
280: Handle column

Claims (4)

A water tank having a floor and an outer wall of a predetermined area and capable of accommodating biofloat breeding water; A breeding water infusion tube installed at one side of the upper part of the water tank to supply the breeding water from the bioflag breeding water tank to the water tank; An air supply device for supplying air into the water tank;
A breeding water collection pipe installed at an upper side of the water tank for recovering biofloating sludge from the water tank; A collecting flask provided horizontally along the inner wall surface of the water tank wall and installed above the holding water collecting pipe;
A collecting plate which is seated and fixed on the collecting flask and is capable of collecting the bioflactured sludge accumulated on the water bath; A handle provided at the center of the collecting plate and capable of collecting the bioflactured sludge accumulated on the collecting plate;
Wherein the collecting plate has a plurality of collecting part plates and a collecting wall formed at an edge of the collecting part plate and having a predetermined area and height vertically with respect to the collecting part plate, Wherein the bioflux sludge collecting device comprises: delete delete delete
KR1020150159600A 2015-11-13 2015-11-13 Device for collection of sludge of biofloc KR101802607B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101934267B1 (en) 2018-06-11 2019-03-25 대한민국 Internal TSS(Total Suspended Solids) Removal Filter for Biofloc Technology System
KR102632307B1 (en) 2022-12-13 2024-02-05 전북특별자치도 남원시(남원시농업기술센터장) Underwater Observation device for Biofloc type farm water tank

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102181469B1 (en) 2018-11-22 2020-11-23 주식회사 네오엔비즈 Apparatus for biofloc aquaculture system.

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101047166B1 (en) * 2010-07-19 2011-07-06 권혁성 A flotation apparatus for treating high-concentrated organic waste water

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101047166B1 (en) * 2010-07-19 2011-07-06 권혁성 A flotation apparatus for treating high-concentrated organic waste water

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101934267B1 (en) 2018-06-11 2019-03-25 대한민국 Internal TSS(Total Suspended Solids) Removal Filter for Biofloc Technology System
KR102632307B1 (en) 2022-12-13 2024-02-05 전북특별자치도 남원시(남원시농업기술센터장) Underwater Observation device for Biofloc type farm water tank

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