RU2728469C1 - Closed water supply system for industrial cultivation of hydrobionts - Google Patents

Abstract

FIELD: pools; technological processes.SUBSTANCE: system includes a pool, a mechanical filter, air sprayers, a biological filter and ultraviolet lamps. System is additionally equipped with an oxygen atomizer with a channel located above it, isolated from the atmosphere by a chamber placed above the channel and equipped with a branch pipe. Pool, mechanical filter, air sprayers, biological filter, ultraviolet lamps, oxygen atomizer, channel and chamber isolated from atmosphere are arranged in hollow housing, wherein biological filter is located under pool.EFFECT: invention provides reduced costs for water treatment.1 cl, 2 dwg

Description

The proposed invention can be used for industrial cultivation of aquatic organisms.

Known invention [1], including the stage of selection of contaminated water from a pool or pools with aquaculture from any horizontal level of the pool or pools, the stage of primary mechanical purification of the sampled water, carried out on a filter with separation lamellas, the stage of biological water purification, carried out on a filter with bio-loading in a pseudo-boiling bed with unidirectional movement of purified water and air from bottom to top, a stage of secondary fine mechanical cleaning carried out on a filter with separation lamellas, a stage of water disinfection by ozonation with simultaneous enrichment of water with oxygen when using a gas ozone-oxygen mixture under a pressure of 1.05-1, 40 bar, followed by holding the treated water at atmospheric pressure and controlling the final amount of ozone. At each stage of cleaning, a process for removing the separated mechanical impurities is provided. The water is circulated using a pump. The cleaning equipment is connected in series with each other in accordance with the sequence of the indicated stages and is placed on the technological line up to the pump. Devices for ozonation, water enrichment with oxygen and control of the final amount of ozone are placed on the pressure line of the pump. At the same time, the equipment is installed so that the upper level of the water in the mechanical filters and the upper level of the pseudo-boiling layer of the biofilter are at the level of the mirror of the pool or aquaculture pools with vertical positioning accuracy up to -0.20 m and the pump suction level at the level of the mirror of the pool or aquaculture pools with vertical position accuracy up to -0.50 m.

This invention does not have a stage of ultraviolet disinfection, and a pump with a pressure pipe is used to ensure the circulation of water, which implies a turbulent flow of water at high pressure, which is energy-intensive. Also, the stage of ozonation with simultaneous enrichment of water with oxygen implies that undissolved ozone and oxygen will enter the atmosphere, which leads to an unjustified increase in gas consumption and an increased risk of ozone poisoning.

A device with a closed cycle of water supply for the cultivation of commercial fish species is known [2], which includes blocks for growing aquatic organisms interacting with each other through water pipes and information-switching channels, a stabilization water tank, a mechanical filtration unit, a biological water enrichment unit, a denitrification biofilter, a nitrification biofilter, a channel aeration unit, ultraviolet irradiation unit, boiler, water pH stabilization unit, pump, first air compressor, fish tanks, reserve water tank, second air compressor, fresh water supply unit, waste water and sediment removal unit, first, second and third gates , a level automation unit, a water parameter monitoring and control unit, a pump for pumping sediment fractions from a biological water enrichment unit, a mixer, a pump for a biological water enrichment unit and a pump for a reserve water tank.

This device circulates water through a pump and pipelines, which implies a turbulent flow of water at high pressure, which is energy intensive. Also, there is no oxygenation step in the device.

The closest known analogue is the technology of controlled closed water supply [3]. This technology includes the following stages: gravity feed of water from tanks with fish, mechanical filtration, ozonation or ultraviolet treatment, biofiltration with static loading, biofiltration with floating loading, oxygenation, pressurized water supply to tanks with fish. Water supply after biofiltration with floating loading before water supply to fish tanks is carried out using a pump through pipelines.

This technology implies a partially turbulent flow of water at high pressure, which is energy intensive.

The technical result achieved by the proposed system consists in reducing energy consumption for water purification when growing aquatic organisms.

The technical result is achieved by the fact that the closed water supply system for the industrial cultivation of aquatic organisms includes a pool, a mechanical filter, air diffusers, a biological filter and ultraviolet lamps. The system is equipped with an oxygen atomizer, a channel located above it, a chamber isolated from the atmosphere, located above the channel and equipped with a branch pipe. The pool, mechanical filter, air diffusers, biological filter, ultraviolet lamps, oxygen atomizer, channel and chamber isolated from the atmosphere are housed in a hollow housing, while the biological filter is located under the pool.

FIG. 1 shows a diagram of a closed water supply system for industrial cultivation of aquatic organisms.

FIG. 2 shows a cross-section of the zone of the mechanical filter of a closed water supply device for industrial cultivation of aquatic organisms.

The closed water supply system for the industrial cultivation of aquatic organisms consists of a hollow body 1, divided into two tiers (see Fig. 1): pool 2 (intended for keeping aquatic organisms: fish, crustaceans, etc.) and a biological filter 3. From one end of the housing there is a mechanical filter 4. The zone of the mechanical filter 4 is separated from the pool 2 by a perforated partition 8. Under the mechanical filter 4 there are air diffusers 5. For the outlet of the air supplied by the air nozzles 5, ducts 6 are provided. Moreover, the air outlet can be done in any other way (for example, using pipes). At the level of the biological filter 3, on the opposite side of the mechanical filter 4, there are ultraviolet lamps 9. The ultraviolet lamps 9 are separated from the biological filter 3 by a perforated partition 7. To the left of the ultraviolet lamps 9 there is an oxygen atomizer 10. Above the oxygen atomizer 10 is a channel 11, which is separated from pool 2 and ultraviolet lamps 9 by partition 12. Above channel 11 there is an insulated chamber 13, the lower edge of which is located below the water level in the pool 2. On the enclosing structure of the insulated chamber 13 there is a branch pipe 14 and a connection for oxygen supply 15. Moreover, a connection for supply oxygen 15 can be located both on the oxygen supply line to the oxygen atomizer 10 and on the branch pipe 14 or the line connected to the branch pipe 14. From the side of the channel 11, the pool 2 is separated by a perforated partition 16.

A closed water supply system for industrial fish farming is as follows. The device is filled with water to the level of the upper edge of the partition 12. Aquatic organisms are launched into pool 2. Further, the supply of oxygen to the nebulizer 10 is switched on. Oxygen, passing through the nebulizer 10, breaks up into microbubbles and enters the water inside the channel 11. This increases the gas-water contact area and begins to actively dissolve oxygen during the rise of microbubbles to the oxygen cavity inside the isolated chamber 13. During the rise of microbubbles inside the channel 11, a gas-water mixture is formed, the density of which is lower than the density of water in the device. Because of this, the column of the gas-water mixture rises above the baffle 12 and water is overflowed into the pool 2 through the perforated baffle 16. Oxygen for supplying to the nebulizer 10 is taken from the bell through the branch pipe 14. Dissolved oxygen is replaced by oxygen supplied through the oxygen supply connection 15 Also, oxygen can be supplied to the oxygen supply line to the oxygen nebulizer 10, so through the nozzle 14 or a line connected to the nozzle 14. The insulated chamber 13 is not in communication with the atmosphere. Further, the water moves along the pool 2 in a laminar mode. In the process of flowing, aquatic organisms absorb oxygen and release waste products and carbon dioxide into the water. Further, the water enters the mechanical filter 4, through the perforated partition 8, and is cleaned of mechanical impurities. Further, water enters under the mechanical filter through the hole. Air is supplied to the air nozzles 5, located under the mechanical filter 4, which comes out through channels 6. Water does not overflow through channels 6. In this case, water degassing (removal of carbon dioxide) occurs. Further, water enters the biological filter 3, through the perforated partition 7, where decomposition of ammonia and its ions occurs. The flow of water through the biological filter 3 occurs in a laminar mode. The biological filter 3 can be used both floating and sinking biofuel, as well as biofuel with zero buoyancy. Also, aeration can be used in the biofilter 3. In this case, the exit of air from the biofilter 3 can be organized through channels similar to channels 6. After passing the biological filter 3, through the perforated partition 17, water flows through the ultraviolet lamps 9. The water is disinfected by ultraviolet radiation. Further, the water is sucked in through the gap under the partition 12 and enters the channel 11, where it is enriched with oxygen. Further, the process is repeated.

List of used literature

1. Method for purifying and preparing water in closed water supply installations for growing aquaculture. Patent for invention RU No. 2696434, published on 01.08.2019

2. A device with a closed cycle of water supply for the cultivation of commercial fish species. Patent for invention RU No. 2637522, published on 05.12.2017

3. FISH-AGRO company. Managed closed water supply technology, http://fish-agro.ru/fish-agro/what_about/

Claims (1)

A closed water supply system for the industrial cultivation of aquatic organisms, including a pool, a mechanical filter, air nebulizers, a biological filter, ultraviolet lamps, characterized in that the system is equipped with an oxygen atomizer located above it by a channel, a chamber isolated from the atmosphere, located above the channel and equipped with a branch pipe, and a pool, a mechanical filter, air diffusers, a biological filter, ultraviolet lamps, an oxygen atomizer, a channel and a chamber isolated from the atmosphere are housed in a hollow housing, while the biological filter is located under the pool.

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