RU2492699C1 - Feedstuff production method with usage of blue-green microalgae and line for the method implementation - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention relates to feedstuff industry and may be used during granulated feedstuffs production according to the dry and wet granulation technology.

EFFECT: invention usage will allow to manufacture feedstuffs adapted for various species of animals, birds and fishes and having increased nutritive and biological value due to blue-green microalgae introduction into the suspension composition.

2 cl, 1 dwg, 3 tbl

Description

The invention relates to the feed industry and can be used in the production of granulated feed using dry and wet granulation technology.

There is a method of producing feed at a feed mill Ramensky KHP of the Moscow region [Guidelines for the technology of feed, protein-vitamin-mineral concentrates and premixes. In 2 vols. T.2. under the editorship of Doctor of Technical Sciences V.A. Afanasyev. Voronezh, 2007], which provides for the grinding of raw materials on crushers with a mesh diameter of sieve 3 ... 4 mm, mixing the components of the feed, granulation of loose feed with the simultaneous introduction of steam at a pressure of 0.4 ... 0.5 MPa, cooling the obtained granules in the cooling column to a temperature not more than 10 ° C higher than the temperature in the production room, grinding and sifting to obtain granules, depending on the recipe: 4.7 mm; 7.7 mm; 9.7 mm. The line on which the known method is implemented includes dosing, mixing and granulating sections of loose feed and protein-vitamin-mineral components with joint portion processing of grain, granular raw materials and meal, joint portion processing of protein-mineral raw materials and one-stage dosing.

A disadvantage of the known standard method is the limited number of biologically active additives introduced into the finished product, incorporating “living” cells, since all biologically valuable components are introduced only as part of premixes. In addition, the method does not provide for the use of wet granulation of loose feed, which allows to reduce the crumbiness of the obtained feed and, as a result, to increase its feed value.

The disadvantage of the line that implements the known method is the lack of equipment for receiving and feeding blue-green microalgae into the feed, which are a source of biologically valuable components. In addition, the line does not allow to obtain a wide range of products for various species of animals, birds and fish, and it is also impossible to realize wet granulation of loose feed in the line, since it is not possible to use a dryer after the granulator.

An object of the invention is to develop a method of producing feed using a suspension of blue-green microalgae and a line for its implementation, allowing to obtain feed, enriched with biologically active substances, vitamins and minerals that make up the suspension of blue-green microalgae, to improve the quality of the finished product and expand technological Opportunities for a feed production line adapted for various types of animals, birds and fish.

To solve the technical problem of the invention, a method for the production of animal feed using a suspension of blue-green microalgae is proposed, characterized in that grain is used to produce feed, which requires grinding, for example, grain of wheat, barley, oats, rye, grain raw materials that do not require grinding, for example , flour, bran, crusher, protein and mineral raw materials and a suspension of blue-green microalgae, and the grain raw materials, protein and mineral raw materials are weighed, and grain raw materials requiring grinding, elkovoe minerals and purified by metallomagnetic impurities separated coarse fraction, which is directed to grinding and then combined with the fine fraction; blue-green microalgae is cultured from a mixture of inoculum and nutrient medium in a photobioreactor battery in the form of a suspension in a recirculation mode with a constant supply of a mixture of air and carbon dioxide concentration of 5 ... 7% until the suspension reaches the required optical density for a filter with a wavelength of D ₇₅₀ - 0, 73 ... 0.91, then the suspension is sent for tempering at a temperature of 28 ... 34 ° C to equalize its temperature and then centrifuged, resulting in a precipitate of the suspension with a solids content of 10 ... 15% and fugue at (intercellular fluid), while part of the suspension sediment is fed for mixing with the centrate until the solids concentration in the suspension is 4 ... 5%, part is mixed with the centrate for the solids concentration in the suspension 1 ... 1.5%, and the excess of the centrate is in a mixture of inoculum and culture medium for the cultivation of microalgae; prepared grain, protein and mineral raw materials are mixed periodically for 3 ... 6 minutes with a suspension of blue-green microalgae with a solids concentration of 4 ... 5%, supplied in an amount of 3 ... 6% by weight of the mixture to obtain bulk feed, which is then sent for granulation with the simultaneous introduction of a suspension of blue-green microalgae with a solids concentration of 1 ... 1.5% in the amount of 1.5 ... 3% by weight of feed, the obtained granules with a moisture content of 18 ... 20% are dried in a vibro-boiling layer with warm air to a moisture content of 15 ... 16% oh cradle to a temperature not exceeding the temperature in the production room by more than 3 ... 5 ° C, and grind, moreover, in the process of cooling, the moisture content of the granules is reduced to the required 11 ... 14%; after grinding, the grains are fractionated to obtain three fractions: coarse, medium and fine, while the coarse fraction is returned to grinding, the fine fraction to granulation, and the middle fraction is sent for storage as a finished product.

A feed production line using a suspension of blue-green microalgae contains areas for preparing grain raw materials requiring grinding, preparing grain raw materials that do not require grinding, preparing protein and mineral raw materials, cultivating and centrifuging a suspension of blue-green microalgae, and obtaining loose and granular mixed feed; moreover, the preparation of grain raw materials requiring grinding, and the preparation of protein and mineral raw materials includes sequentially installed hoppers equipped with screw feeders, hopper scales, magnetic column, single-sieve sieving machine and hammer mill; the preparation area for grain raw materials that do not require grinding includes sequentially installed bins equipped with screw feeders and hopper scales; the blue-green microalgae suspension cultivation section includes a photobioreactor battery, a circulation pump, an initial suspension hopper, a carbon dioxide battery, a compressor, a gas mixer and a pump located after the photobioreactor battery, which supplies the finished suspension to a centrifugation section, which includes a series-mounted tempering bin and a centrifuge, after which a hopper for sediment suspension and a hopper for centrifuge, a mixer for receiving slurry with a solids concentration of 4 ... 5% and an agitator to obtain a slurry with a solids concentration of 1 ... 1.5%, a metering pump that dispenses a suspension with a solids concentration of 4 ... 5% in a batch mixer, and a metering pump ensuring dosing of the suspension with a solids concentration of 1 ... 1.5% into the press granulator, and after the hoppers for sludge and centrifuge, there are two-flow and three-flow distributors for feeding the sediment and centrate in the mixers and for removing the excess centrate in the hopper for the initial suspension and; the bulk feed receiving section includes a mixing hopper installed after the preparation of grain, protein and mineral raw materials, a batch mixer with a nozzle block for introducing a suspension of blue-green microalgae and a mixing hopper; the granulated feed production site located after the bulk feed production site includes a sequentially mounted elevator, a super-granulator hopper, a magnetic column, a press granulator, a vibratory dryer, a cooling column, a grinder and a two-screen screening machine, after which a noria and silos for storing finished cereals are installed, equipped with screw feeders and transport devices.

The technical result of the invention is to increase the nutritional and biological value of animal feed, improve their quality and expand the technological capabilities of the line for the production of animal feed adapted for various types of animals, birds and fish.

Figure 1 presents a General view of the line that implements the proposed method for the production of feed using a suspension of blue-green microalgae.

A feed production line using a suspension of blue-green microalgae contains a section for preparing grain raw materials requiring grinding, including sequentially installed hoppers 1 equipped with screw feeders 2, hopper scales 3, a magnetic column 4, a single-sieve screening machine 5 and a hammer mill 6; a preparation site for grain raw materials that does not require grinding, including sequentially installed hoppers 7, equipped with screw feeders 8, and hopper scales 9; a site for the preparation of protein-mineral raw materials, including sequentially installed bins 10 equipped with screw feeders 11, bunker scales 12, a magnetic column 13, a single-sieve screening machine 14 and a hammer mill 15; a cultivation section of a suspension of blue-green microalgae, including a battery of photobioreactors 16, a circulation pump 17, a hopper for the initial suspension 18, a battery of carbon dioxide cylinders 19, a compressor 20, a gas mixer 21 and a pump 22, which supplies the finished suspension to a centrifugation section, including a temperature-controlled set a hopper 23 and a centrifuge 24, after which a hopper for sediment suspension 25 and a hopper for centrifuge 26, an agitator for receiving a suspension with a concentration of vascular substances 4 ... 5% 27 and a mixer to obtain a suspension with a solids concentration of 1 ... 1.5% 28, a metering pump that dispenses a suspension with a solids concentration of 4 ... 5% 29, and a metering pump that provides a suspension of solids concentration of 1 ... 1.5% 30, two-line 31 and three-line 32 dispensers; a bulk feed receiving section including a mixing hopper 33, a batch mixer with a nozzle block for introducing a suspension of blue-green microalgae 34, a mixing hopper 35; a granular feed production site including sequentially mounted noria 36, a granulator hopper 37, a magnetic column 38, a pellet mill 39, a vibratory dryer 40, a cooling column 41, a grinder 42 and a two-sieve screening machine 43, after which a noriya 44 and storage bins are installed product 45, equipped with screw feeders 46 and scraper conveyors 47, 48.

The line contains the following flows: supply of grain raw materials requiring grinding, for fractionation 0.1.1, grain raw materials that do not require grinding, for mixing 0.1.2, large fractions of grain raw materials for regrinding 0.1.3, small fractions of grain raw materials for mixing 0.1.4 , crushed grain raw materials for mixing 0.1.5; feeding protein-mineral raw materials for separation 0.2.1, coarse protein-mineral raw materials for regrinding 0.2.2, fine fractions of protein-mineral raw materials for mixing 0.2.3, crushed protein-mineral raw materials for mixing 0.2.4; feeding the mixture of the initial suspension of blue-green microalgae in the photobioreactor 0.3.1; removal of a suspension of blue-green microalgae for recycling 0.3.2; feeding the finished suspension of blue-green microalgae to the tempering hopper 0.3.3 and then to centrifuging 0.3.4, feeding the precipitate of the suspension into the hopper 0.3.5 and further into the mixer 0.3.7, feeding the centrate into the hopper 0.3.6 and then into the mixer 0.3. 8, feeding the excess centrate into the hopper for the initial suspension 0.3.9, feeding the suspension with a solids concentration of 4 ... 5% into the mixer 0.3.10, feeding the suspension with a solids concentration of 1 ... 1.5% into the press granulator 0.3.11; feeding bulk feed for granulation 0.4.1, feeding granulated feed for drying 0.4.2, feeding dried feed for cooling and grinding 0.4.3, chopped granulated feed for fractionation 0.4.4, a large fraction of chopped granulated feed for grinding 0.4.5, medium fractions of the crushed granulated compound feed in hoppers for the finished product 0.4.6, the fine fraction of the crushed granulated compound feed for repeated granulation 0.4.7; tempering of the finished product 0.4.8; air supply from the compressor to the gas mixer 3.5; supply of carbon dioxide from a carbon dioxide battery to a gas mixer 5.4, a mixture of air with carbon dioxide into a battery of photobioreactors 5.7.1, an exhausted mixture of air with carbon dioxide into a gas mixer 5.7.2.

The proposed method for the production of feed using a suspension of blue-green microalgae, implemented on a production line, is as follows.

Grain raw materials requiring grinding, for example, grain of wheat, barley, oats, rye, from hoppers 1 are fed by screw feeders 2 for weighing into hopper scales 3 and then along line 0.1.1 to a magnetic column 4. After separation of the metal-magnetic impurities, the raw materials are subjected fractionation in a single-sieve screening machine 5 to obtain a fine and coarse fraction. A large fraction along the line 0.1.3 is sent for grinding to crusher 6, and then along the line 0.1.5 it is combined with the small fraction, which is fed through the line 0.1.4 to the mixing hopper 33.

Grain raw materials that do not require grinding, for example, flour, bran, crusher, from the hoppers 7 by means of screw feeders 8 are fed for weighing into the hopper scales 9 and then along the line 0.1.2 into the mixing hopper 33.

Protein and mineral raw materials from the bunkers 10 are fed by screw feeders 11 for weighing into the bunker scales 12 and then fed to the magnetic column 13 for purification from metal-magnetic impurities through line 0.2.1. The raw materials are then fractionated in a single-sieve screening machine 14 to obtain fine and coarse fractions. A large fraction along the line 0.2.2 is sent for grinding to the crusher 15, and then along the line 0.2.4 it is combined with the small fraction, which is fed through the line 0.2.3 to the mixing hopper 33.

Preparation of a suspension of blue-green microalgae for introduction into the feed is carried out at cultivation and centrifugation sites. The prepared mixture of the inoculum and the nutrient medium from the hopper 18 is sent via line 0.3.1 to the photobioreactor battery 16, in which the suspension of blue-green microalgae is saturated with carbon dioxide from its mixture with air supplied by the compressor 20 via line 3.5 and the carbon dioxide battery cylinders 19, supplied along the line 5.4. The mixing of CO ₂ and air is carried out in a gas mixer 21 to a carbon dioxide concentration of 5 ... 7%. The initial suspension of blue-green microalgae is cultivated until the suspension reaches the required optical density for a filter with a wavelength of D ₇₅₀ - 0.73 ... 0.91 in the recirculation mode along the line 0.3.2. To ensure the recirculation mode, use a circulation pump 17. The finished suspension through line 0.3.3 pump 22 is fed into the tempering hopper 23, which ensures the temperature of the suspension in the range of 28 ... 34 ° C. From the hopper 23, the finished suspension of blue-green microalgae is sent along line 0.3.4 to the centrifuge 24. As a result of centrifugation, a suspension precipitate is formed with a solids content of 10 ... 15% and a centrate, which is placed along lines 0.3.5 and 0.3.6 in the hopper 25 and 26. The obtained precipitate is fed through line 0.3.7 to a double-flow distributor 31, which sends part of the precipitate of the suspension for mixing with the centrate in the mixer 27 to obtain a suspension with a solids concentration of 4 ... 5%, and part of the precipitate is sent for mixing with the centrate in the mixer 28 to obtain a suspension AI with a concentration of solids of 1 ... 1.5%. The excess centrate using a three-line distributor 32 is separated and fed through line 0.3.9 for mixing with the inoculum and nutrient medium in the hopper 18.

From the mixing hopper 33, the prepared grain, protein and mineral raw materials are sent to a batch mixer 34, where a suspension of blue-green microalgae with a solids concentration of 4 ... 5% in the amount of 3 ... 6% by weight is introduced simultaneously through line 0.3.10 through the nozzle block raw materials fed to the mixer. In the mixer 34, all components are mixed for 3 ... 6 minutes to obtain bulk feed.

The resulting loose feed through line 0.4.1 enters the noriya 36, which feeds it into the pressurized hopper 37. Next, the feed is cleaned of metal-magnetic impurities in the magnetic column 38 and sent for granulation in the press granulator 39. During granulation in the mixing chamber of the press granulator through a metering pump 30, a suspension of blue-green microalgae with a solids concentration of 1 ... 1.5% in the amount of 1.5 ... 3% by weight of feed is introduced through line 0.3.11. The granular compound feed obtained with the wet method with a moisture content of 18 ... 20% is sent along line 0.4.2 to a vibrating dryer 40, where it is dried in a vibro-boiling layer with warm air to a moisture content of 15 ... 16%. Next, the granules along line 0.4.3 are fed to a cooling column 41, in which they are cooled by a stream of air to a temperature not exceeding the temperature in the production room by more than 3 ... 5 ° C to prevent condensation of water vapor from the ambient air on the surface of the granules and then crushed in a grinder 42. During the cooling process, the moisture content of the granules is reduced to the required 11..14%. The feed obtained after the grinder through line 0.4.4 is sent for fractionation to a two-sieve screening machine 43, in which they are divided into three fractions: large, medium and small. Moreover, the coarse fraction is returned through grinding line 0.4.5, the fine fraction is returned to granulation through 0.4.7 line, and the middle fraction is transferred to bins 45, equipped with screw feeders 46 and scraper conveyors 47, 48.

Ready-made feed is released to the consumer from storage bins 45 on line 0.4.8.

The use of a suspension of blue-green microalgae (Chlorella and Spirulina of various strains, etc.) in the production of animal feed for various species of animals, birds and fish is determined by the unique composition and properties of these microorganisms. The action of a suspension of microalgae is based on a natural combination of natural stimulating and biologically active substances secreted into the culture medium - exametabolites. The suspension (culture medium) contains amino acids, vitamins, enzymes and other biologically active substances. It was found that the release of exametabolites into the culture medium is most intense at the initial stage of cell growth. The action of the suspension of blue-green microalgae is aimed at increasing the resistance of animals, birds and fish to adverse environmental conditions, strengthening immunity and increasing the fecundity of adults and young animals survival. At the same time, the use of a natural object as a feed additive allows avoiding side effects caused by synthetic drugs (including vitamins and antibiotics) [Bogdanov N.I. Chlorella improves bird productivity [Text] / N.I. Bogdanov // Poultry farming. - 2002. - No. 3. - S.31-33; Gaysina L.A. Modern methods of isolation and cultivation of algae [Text] / L.A. Gaysina, A.I. Fazlutdinova, P.P. Kabirov. - Ufa: BSPU, 2008 .-- 152 p .; Andersen, R.A. Algal culturing techniques [Text] / R.A. Andersen. - Burlington: Academic Press, 2005. - 570 p.].

Thus, to increase the nutritional and biological value of animal feed, it is necessary to introduce as much suspension of microalgae as possible. Therefore, in the present invention, centrifugation of the suspension obtained after photobioreactors is used to increase the concentration of nutrients and a two-stage introduction of the suspension into the feed.

Production tests.

A method of producing feed using a suspension of blue-green microalgae was implemented at Voronezh Experimental Feed Mill OJSC on a production line for the production of granulated feed with its technical re-equipment and additional installation of the necessary equipment for the implementation of new technological processes and the production of an experimental batch of feed. To enter the feed was used a suspension of blue-green microalgae Spirulina platensis. This microalgae has a unique chemical composition and is very attractive as a biologically active additive in the preparation of feed [Gaysina L.A. Modern methods of isolation and cultivation of algae [Text] / L.A. Gaysina, A.I. Fazlutdinova, P.P. Kabirov. - Ufa: BSPU, 2008. - 152 p.].

Table 1 shows the biochemical composition of the microalga Spirulina platensis [Technology for the industrial cultivation of spirulina (Spirulina platensis) / comp .: R.P. Trenkenshu, R.G. Georgis; NAS of Ukraine; Institute of Biology of the South Seas A.O. Kovalevsky; Department of Biotechnology and Phytoresources. - Sevastopol, 2004.].

Table 1 Amino acids % of total protein Minerals mg / kg one 2 3 four Lysine 5.1 Calcium 1200 Methionine 2.6 Phosphorus 8300 Cystine 0.9 Iron + Manganese 500 Tryptophan 1,5 Sodium 300 Arginine 6.5 Chlorine 4200 Histidine 1,5 Magnesium 3700 Leucine 8.7 Zinc 3 Isoleucine 5.7 Potassium 14000 Alanine 7.9 Copper + Chrome 3 Phenylalanine 5,0 Iodine + Molybdenum 3 Proline 4.1 Selenium 2

continuation of table 1 one 2 3 four Tyrosine 4.6 Vitamins mg / kg Threonine 5,4 b-carotene 1700 Valine 7.5 AT 12 1,6 Glycine 4.8 AT 5 eleven Series 5.3 Folic acid 0.5 Aspartic acid 9.1 Inositol 350 Glutamic acid 12.7 Niacin 118 Fatty acid mg / kg Pyridoxine 3 Lauric 200 Thiamine 55 Myristine 600 Tocopherol 190 Palmitic 16000-21000 Nutrients % Palmitoleic 1500-2000 Protein 60-70 Palmitolene 350 Carbohydrates 10-15 Heptadecane 90-140 Fats 6.5-8 Stearin 0-350 Ash 7-8 Oleic 2000-3000 Cellulose 2 Linoleic 10000-14000 Humidity 6 U-linoleic 8700-11900 Protein content 65 b-linoleic 160-420 The ratio of energy received to spent 4.2 Other 700-7000

Table 2 shows the parameters at which the compound feed was received on a standard line and the compound feed was obtained with the introduction of a suspension of blue-green microalgae Spirulina platensis.

The increased humidity of the feed after the pellet mill is reduced in an additionally installed vibratory dryer. This makes it possible to stepwise reduce the humidity of the finished product without loss of quality. Despite the increase in the energy intensity of the process, the proposed line significantly exceeds the existing one in terms of the range of products and the quality of the obtained granules.

Table 3 shows the quality indicators of the feed obtained on the standard line and feed with the introduction of a suspension of blue-green microalgae Spirulina platensis.

table 2 No. p / p Name of indicator Units rev. Indicators feed production lines at the Ramensky collective farm in the Moscow region feed production line with the introduction of a suspension of blue-green microalgae Spirulina platensis one. Mixer capacity kg 3000 3000 2. Pellet moisture after pellet press % 14 ... 15 17 ... 19 3. Nominal drive power of the pellet mill kw 120 120 four. The temperature of cultivation in the bioreactor ° C - 30 ... 35 5. The concentration of the finished suspension g / l - 30 ... 35 6. Air-gas mixture consumption in a bioreactor m ³ / h - 3 ... 5 7. Carbon dioxide concentration in the gas phase % - 2.0 8. Name of the grown microalgae - Spirulina platensis 9. Energy intensity of the process kWh / t 15.01 16.32

As can be seen from the data presented, feed containing microalgae has an increased nutritional and biological value. In addition, there is a decrease in the granularity of the granules, and, accordingly, a decrease in the amount of crumbs in the finished product, which increases the quality of the feed supplied to the consumer.

Table 3 Feed Characterization Units rev. Indicator feed production lines at the Ramensky collective farm in the Moscow region feed production line with the introduction of a suspension of blue-green microalgae Spirulina platensis Humidity % 13.5 ... 14.0 14.0 ... 14.5 Crumbs, no more % 10 ... 12 8.2 The presence of crumbs (sieve passage ⌀2 mm) % 8 ... 10 2.1 ... 2.9 Temperature ° C 25 ... 29 28 ... 30 Exchange energy kcal / 100 280 ... 300 308 ... 315 Content: Ca, % 0.6 ... 0.8 0.8 ... 1.1 R, 0.55 ... 0.6 0.65 ... 0.75 Na 0.18 ... 0.22 0.22 ... 0.32

In the present invention, the suspension is introduced into the feed in two stages. At the first stage, the suspension is fed to a batch mixer in an amount of 3 ... 6% to obtain bulk feed. It was experimentally obtained that when introducing a suspension of less than 3%, the entire positive effect of using microalgae in increasing the nutritional and biological value of the obtained feed will not be achieved, and introducing a suspension of more than 6% is limited by the possibility of using industrial equipment. In a similar way, the rational interval for feeding the suspension (1 ... 1.5%) to the press granulator in the second stage was determined upon receipt of the granulated feed.

Thus, the method of production of feed using a suspension of blue-green microalgae and a line for its implementation allows you to:

- get feed for various animals, birds and fish, which has high nutritional and biological value, by introducing a suspension of blue-green microalgae, which is a biologically active additive;

- add the maximum possible amount of suspension to the feed without reducing its technological characteristics, due to the two-stage input at the stage of obtaining loose and granular feed;

- reduce the crumbiness of the finished product, since granulation is carried out by the wet method, providing for further drying of the granules;

- get high-quality feed by stabilizing the technological parameters of the intermediate products of the process;

- increase the environmental safety of production due to the use of carbon dioxide recirculation circuits and an excess of slurry concentrate.

Claims (2)

1. A method of producing feed using a suspension of blue-green microalgae, characterized in that grain is used to produce feed, which requires grinding, for example wheat, barley, oats, rye, grain raw materials that do not require grinding, for example, flour, bran, crusher , protein and mineral raw materials, and a suspension of blue-green microalgae, whereby the grain raw materials, protein and mineral raw materials are weighed, and the grain raw materials requiring grinding, protein and mineral raw materials are purified from metal magnesium GOVERNMENTAL impurities separated coarse fraction, which is directed to grinding and then combined with the fine fraction; blue-green microalgae is cultured from a mixture of inoculum and nutrient medium in a photobioreactor battery in the form of a suspension in a recirculation mode with a constant supply of a mixture of air and carbon dioxide with a concentration of 5 ... 7% until the suspension reaches the required optical density for a filter with a wavelength of D ₇₅₀ -0, 73 ... 0.91, then the suspension is sent for tempering at a temperature of 28 ... 34 ° C to equalize its temperature and then centrifuged, resulting in a precipitate of the suspension with a solids content of 10 ... 15% and fugue at (intercellular fluid), while part of the suspension sediment is fed for mixing with the centrate until the solids concentration in the suspension is 4 ... 5%, part is mixed with the centrate for the solids concentration in the suspension 1 ... 1.5%, and the excess of the centrate is in a mixture of inoculum and culture medium for the cultivation of microalgae; prepared grain, protein and mineral raw materials are mixed periodically for 3 ... 6 min with a suspension of blue-green microalgae with a solids concentration of 4 ... 5%, supplied in an amount of 3 ... 6% by weight of the mixture to obtain bulk feed, which is then sent for granulation with the simultaneous introduction of a suspension of blue-green microalgae with a solids concentration of 1 ... 1.5% in the amount of 1.5 ... 3% by weight of feed, the obtained granules with a moisture content of 18 ... 20% are dried in a vibro-boiling layer with warm air to a moisture content of 15 ... 16%, cool wait until the temperature does not exceed the temperature in the production room by more than 3 ... 5 ° C, and grind, moreover, in the process of cooling the humidity of the granules is reduced to the required 11 ... 14%; after grinding, the grains are fractionated to obtain three fractions: coarse, medium and fine, while the coarse fraction is returned to grinding, the fine fraction to granulation, and the middle fraction is sent for storage as a finished product. 2. Line for the production of animal feed using a suspension of blue-green microalgae, characterized in that it contains areas for the preparation of grain raw materials requiring grinding, preparation of grain raw materials that do not require grinding, preparation of protein and mineral raw materials, cultivation and centrifugation of a suspension of blue-green microalgae, receiving loose and granular compound feed; moreover, the preparation of grain raw materials requiring grinding, and the preparation of protein and mineral raw materials includes sequentially installed hoppers equipped with screw feeders, hopper scales, magnetic column, single-sieve sieving machine and hammer mill; the preparation area for grain raw materials that do not require grinding includes sequentially installed bins equipped with screw feeders and hopper scales; the blue-green microalgae suspension cultivation section includes a photobioreactor battery, a circulation pump, an initial suspension hopper, a carbon dioxide battery, a compressor, a gas mixer and a pump located after the photobioreactor battery, which supplies the finished suspension to a centrifugation section, which includes a series-mounted tempering bin and a centrifuge, after which a hopper for sediment suspension and a hopper for centrifuge, a mixer for receiving slurry with a solids concentration of 4 ... 5% and an agitator to obtain a slurry with a solids concentration of 1 ... 1.5%, a metering pump that dispenses a suspension with a solids concentration of 4 ... 5% in a batch mixer, and a metering pump ensuring dosing of the suspension with a solids concentration of 1 ... 1.5% into the press granulator, and after the hoppers for sludge and centrifuge, there are two-flow and three-flow distributors for feeding the sediment and centrate in the mixers and for removing the excess centrate in the hopper for the initial suspension and; the bulk feed receiving section includes a mixing hopper installed after the preparation of grain, protein and mineral raw materials, a batch mixer with a nozzle block for introducing a suspension of blue-green microalgae and a mixing hopper; the granulated feed production site located after the bulk feed production site includes a sequentially mounted elevator, a super-granulator hopper, a magnetic column, a press granulator, a vibratory dryer, a cooling column, a grinder and a two-screen screening machine, after which a noria and silos for storing finished cereals are installed, equipped with screw feeders and transport devices.