SU1126263A1 - Installation for growing fish - Google Patents

Abstract

FISH FISHING INSTALLATION, consisting of a tank for fish, water tanks, a mechanical cleaning filter, a settling tank, an aerator comprising a tank, a water sprayer, an aerating agent supply device, gratings located underneath the nozzle with offset from each other, and a branch pipe water, as well as water circulation systems with a pump, characterized in that, in order to improve the growing conditions of the fish and increase the productivity of the installation while reducing costs, the sump is an aeration tank, The rator is sealed, the aerator is equipped with an ejector mounted in the upper part of the tank, the water sprayer is connected to the outlet of the sump, the water outlet pipe is equipped with a hydraulic lock and connected directly to the fish tank, the device for feeding the aerating agent has a pipe for connecting it to an oxygen supply system, and a mechanical i cleaning filter is installed between the outlet of the fish tank and the sump inlet. (L

Description

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The invention relates to fish farming, in particular, to installations for the industrial cultivation of fish, mainly carps, and can be used to grow fish from fry to marketable size during compacted planting. A known plant for growing fish, including tanks of fish, a circulating water system with pumps, aerators, and a software device (I. However, in this plant, increased productivity is associated with high water costs due to a lack of oxygen concentration in the latter, which ensures the cultivation of fish with a compacted fit In addition, aerators in the day installation are installed directly in fish tanks, as a result of which the oxygen saturation of the water is unstable, and for normal operation of the installation There is a large amount of air, the supply of which into the tank with fish causes erosion of the feed.The closest to the offer is a plant for growing fish, consisting of a tank for fish, tanks for water, a mechanical cleaning filter, a settling tank, an aerator that includes a tank, a water sprayer, a device for supplying an aerating agent, scraps located under the sprayer displaced one relative to another and a water outlet pipe, as well as a water circulation system with a pump 2. However, the installation has a operators in a scrubber open type and additional aeration in pipelines is carried out by means of injectors, which determined oxygen saturation is only up to the limit of solubility of the latter. In addition, in the installation, the water outlet is connected to the fish tank through an open water treatment device with ultraviolet radiation, which makes the oxygen concentration in the water unstable. In order to ensure the production of fish at such an oxygen concentration, a large water flow is required, a large installation volume, the presence of additional settling tanks, which increases energy and capital costs. Unstable oxygen concentration does not contribute to an increase in the growth rate of fish and an increase in productivity. The purpose of the invention is to improve the conditions for growing fish and increasing productivity while reducing costs. To achieve this goal, a fish growing plant consisting of a fish tank, water tanks, a mechanical cleaning filter, a settling tank, an aerator that includes a tank, a water sprayer, an aerating agent supply device, a grating arranged with an ioi dispenser with offset one relative to the other, and the water outlet pipe, as well as the water circulation system with a pump, the sump is an aeration tank, the aerator's boom is made airtight, the aerator is equipped with an ejector mounted in the upper part of the tank The water purifier is connected to the outlet of the sump, the water outlet pipe is equipped with a water seal and connected directly to the fish tank, the aerating agent supply device has a pipe for connecting it to the oxygen supply system, and a mechanical cleaning filter is installed between the fish tank outlet and the sump inlet. The figure schematically shows the proposed plant for growing fish. The fish breeding installation includes tanks 1 for fish, filter 2 for mechanical cleaning, made in the form of a filter press, an aeration tank 3, aerator 4 and a water circulation system including pumps 5, tanks 6 and 7 for water, overflows 8 and pipelines 9.. The outlet of the fish tanks 1 is connected through the tank and the pump 5 to the inlet of the mechanical cleaning filter 2, the outlet of which is connected to the inlet of the aeration tank-sump 3. The aero-tank of the sump 3 is divided by two longitudinal conical walls 10, symmetrical with respect to the longitudinal axis of the aeration tank-sump 3, on aeration chamber II and a settling chamber 12. The lower part of the walls 10 ends with slots 13 for water to exit from chamber II to chamber 12. In walls 10, activated sludge collectors 14 are mounted, the upper edge of which determines the level of activated sludge in chamber 12. Aero-sump 3 is equipped with airlifts 15 with supply pipelines 16 compressed air. In the upper part of chamber 12. there are trays 17 for collecting cleaned water (dy. In the lower part of chamber 11, an air distribution system 18 is formed, formed of pipes or plates 19. Aerator 4 consists of a sealed tank 20, in the upper part of which is an ejector 21 and a water sprayer 22 located underneath. A set of grids 23 parallel to each other mounted across the tank 20 with displacement of the rails 24 of each grid 23 relative to adjacent grids 23 is mounted below the water sprayer 22. cottages aerating agent in the form of a nozzle with a nozzle 27 -26 oxygen supply and water drainage pipe 28 with a water seal 29. A water sprayer 22 connected to a conduit 9 with a yield aeropack 3

and the pipe 28 through the hydraulic lock 29 is connected to the inlet of the tank I for fish.

Tanks 1 for fish are made with a bottom 30 of a conical shape and with a false slot 31. Each of the tanks 1 is equipped with a phytoradiation unit 32 and an automatic feeder 33.

A water circulation system is connected to a water supply pipe 34 from a water source (not shown) -.

In addition, the receiving tank 6 is equipped with a water heating system 35 with a thermostat 36.

In the plant for growing fish, there is a partial discharge of water through conduit 37 and discharge of activated sludge into the sewage system through conduit 38.

The installation works as follows.

Through the water supply pipe 34 from the water source, water enters the tank 6. From the tank, as it is filled, water is withdrawn by pump 5 and is fed to the aerator 4, where through the hydraulic lock 29 through pipe 28 enters the tanks 1 for fish. Upon filling the tanks 1, the water through overflow 8 enters the tank 7, from where, through the corresponding overflow 8, it goes to the aeration tank 3. In the aero tank 3, water is collected in trays 17 to collect the purified water, and then by gravity flows into the tank 6, On This completes the step of filling the installation with water. Next, the water heating system 35 is turned on, for example sparging with direct steam to a predetermined temperature (for carp rocks 25-30 ° C), then the air distribution system 18 of the aerotank sump 3. Simultaneously, the aerator 4 is turned on, for which the ejector 21 and the 25 dl device are activated filing aerating agent.

The creation of the necessary mass of activated sludge for biological treatment is performed gradually, and the tanks I are stocked initially (with a large amount of fish. As the activated sludge accumulates, the ichthyomass is increased to the target for this installation.

The design of the fish tanks 1 provides for the rapid removal of food residues and fish excrement by means of a slot false 31.

From the tank 7, the predetermined part of the waste water enters the mechanical cleaning filter 2, which is made in the form of a filter press of the automatic chamber type FPAKM.

The principle of the filter press is that the liquid phase of the suspension passes through the fabric and drainage base in the filtrate chambers and then into the drain collector, the solid phase is retained and remains on the surface of the fabric, forming a precipitate, which is then pressed by the diaphragm and dried by air.

After the filter presses open between the filter plates, a gap is formed, while the sediment remains on the filter cloth, which is driven by the drive of the trolley of the cloth and removes the sediment From the interplate space. Sludge is discharged simultaneously from both sides of the filter press.

The filtered water and the remaining part of the water from the tank 7 flows by gravity into the II aeration chamber of the aero-settling tank 3. The contaminated water in the chamber And the aeration is mixed with the activated sludge air supplied through the air distribution system 18

The water in the mixture with activated sludge through the slots 13 enters the settling chamber 12, where it is filtered through a suspended layer of activated sludge and settled

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The weighted activated sludge level is maintained at the height of the upper edges of the activated sludge collectors 14. From collections 14 of activated sludge, the airlift 15 returns to the upper part of the aeration chamber II.

Excess sludge is discharged through conduit 38 to the sewer. Biologically purified and separated water is collected in trays 17, from where it enters tank 6, and then is pumped by pump 5 into device 4 for aeration for degassing and acidification, and also to ejector 21 as a working medium. The predetermined part of the water (1-2%) through the pipeline 37 is discharged into the sewer. In the aerator 4, multiple spraying of water occurs on the array of grids 23 in the rarefied medium created by the ejector 21, followed by suction of the evolved gases.

The degassed water is collected at the bottom of the tank 20, where the released volume of gases is replaced by pure oxygen supplied via nozzles 26.

The water thus prepared is fed through the water seal 29 through the pipe 28 to the tanks 1 for fish, and the water used on the ejector 21 is returned through the pipe 9 to the tank 6 and then reused.

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The presence of an aeration tank during the installation reduces the more complete purification of water through the circulation system for C4et, eliminates the need for additional settling devices and contributes to an increase in oxygen concentration during subsequent aeration and aerator.

The design of the aerator, the water sprayer, is connected to the outlet of the aero-basal sump, which allows the water to be saturated with oxygen to a concentration well above the solubility limit of the latter. This is facilitated by the presence of an ejector that removes gases dissolved in water (mainly nitrogen) and oxygen supply through nozzles 26, which results in the maximum stable water saturation with oxygen more than five times the saturation in the prototype unit.

Maximum water saturation with oxygen accelerates the growth rate of the fish with a tight fit.

The use of the plant reduces the energy costs of fish production by reducing the specific water consumption and air consumption.

The economic effect from the use of the installation can be 324.9 thousand rubles. in year.

Claims (1)

FISH GROWING PLANT, consisting of a fish tank, water tanks, a mechanical cleaning filter, a settling tank, an aerator including a tank, a spray of water, a device for supplying an aerating agent, gratings located under the spray with offset one relative to the other, and a pipe water drainage, as well as a water circulation system with a pump, characterized in that, in order to improve fish growing conditions and increase plant productivity while reducing costs, the sump is an aeration tank, aeration tank The sealer is sealed, the aerator is equipped with an ejector mounted in the upper part of the tank, the water atomizer is connected to the outlet of the sump, while the water outlet pipe is equipped with a water seal and connected directly to the fish tank, the device for supplying the aerating agent has a pipe for connecting it to the oxygen supply system and a mechanical cleaning filter is installed between the outlet of the fish tank and the inlet of the sump. U 05 to 05 SB