Fish Feed Pellets Research Articles

Optimizing Fish Feed Pellets Handling Systems to Minimize Microplastics Emissions - A Pilot Test Based Approach

The fisheries and aquaculture industries are vital components of global food production, yet they also contribute to release of microplastics into marine environments, posing risks to ecosystem health and seafood safety. Among the contributing factors, the erosion of feeding pipes during the pneumatic conveyance of fish feed pellets stands out as a significant source of microplastic pollution. This study focuses on optimizing feed pellet conveying systems in fish farms to minimize microplastic emissions while maximizing pipeline lifespan and pellet integrity. Using high-density polyethylene (HDPE) pipes commonly found in aquaculture facilities, the impact of air velocity and pipeline configuration on pipe wall erosion and pellet breakage was investigated. Through pneumatic conveying tests, the effects of varying air flow rates and bend radii were assessed on pipeline wear and feed pellet integrity. The findings of the study underscored the importance of optimizing operating parameters to bring a balance between preventing pipe blockages and minimizing abrasive impacts on pellets and pipeline surfaces. Furthermore, a simulationbased approach to optimize feeding system performance is presented, integrating the experimental results into a computational model. This model allows for the evaluation of different operating conditions and pipeline configurations, offering insights into costeffective strategies for reducing microplastic emissions while maintaining efficient feed delivery to fish populations. Ultimately, this research provided practical recommendations and best practices for the aquaculture industry to mitigate microplastic pollution from feeding pipes. By optimizing feed pellet conveying systems, environmental sustainability can be enhanced, seafood quality be preserved, and bolster consumer confidence in aquaculture products.

Peningkatan Produksi Melalui Formulasi Pakan Berbasis Potensi Lokal Sebagai Alternatif Pakan Buatan Pada Budidaya Ikan Lele

Doktor Mengabdi (DM) activities develop partnerships in orderto overcome the problem of higher feed prices, which have a small profit or even a loss. This is exacerbated if, during harvest, the price of catfish per kilogram decreases. The urgency needed to solve these problems is then met by training on the formulation and manufacture of self-sufficient feed based on the potential of local ingredients. The activity partners were BUMDES of Labruk Lor Village and the "Mina Agung Mandiri" Fish Farming Group, which was further assisted by the Lumajang District FisheriesService. The results that have been applied to this activity include: 1) socialization with approaches and providing understanding to activity partners; 2) counseling and training to increase knowledge about good and correct fish farming and making fish feed independently by utilizing abundant raw materials in the surrounding area; and 3) The practice or direct application of making fish feed includes flouring the raw materials for making fish feed, mixing all the raw material compositions for making fish feed, and printing using a fish feed pellet printing machine. 4). Evaluation and monitoring of the implementation of activities 5). Evaluating the impact of activities, both the impact on the economy and fish growth, This activity provides farmers with theability to make feed independently and shows an increase in the profit yields of fish farming production by up to 40%. Furthermore, based on the measurements carried out, it showthat the water quality of each partner's pond is still in optimal conditionfor fish growth and does not indicate any diseases that attack the growth and development of the fish being cultivated.

Экономическое обоснование уборки зерновых культур ранних фаз спелости очесом и приготовления корма из необмолоченного вороха

Abstract. The stripping of grain allows organizing the separate harvesting of grain for feed in early phases and for food purposes in the phase of full ripeness. Purpose. To carry out the economic justification of the technology of harvesting early ripening grains by stripping without threshing and the technology of preparing pelleted fish feed for fish from unthreshed ears and additives. Methods. Economical estimation of the technology of winter wheat harvesting by stripping in early phases of ripeness without threshing and its processing into feed has been carried out by comparing operational and indicated expenses of the total technological operations. Scientific novelty lies in the joint estimation of the economic efficiency of technologies of harvesting and processing of grain crops. Results. The prime cost of harvesting cereals without threshing and separation is 2.65 times lower than that of the harvesting technology with combine threshing and separation. The cost of performing operations under the traditional (from grain) and the new (from ears) technologies of pelleted fish feed production is almost equal. However, the total cost of technological operations of harvesting grain without threshing and preparation of pelleted feed from unthreshed ears using the new technology is 24.3 % lower than that of traditional technology of harvesting with threshing and preparation of feed from grain. The use of non-grain part of ears of early ripeness in the composition of feed will increase the amount of raw material from hectare of sown area by 20–30 %. The proposed technologies is cost-effective and promising for implementation in the agricultural enterprises of southern Russia.

Nilai Pemanfaatan Limbah Kelapa Sawit untuk Pakan Ternak (Studi Kasus Pakan Ruminasia)

The issue of feed has a large proportion of the sustainability of livestock businesses. On the other hand, palm fronds as post-harvest agricultural waste and bran as post-processing waste have not been utilized optimally. Even though the nutritional content contained in it is quite high. Agricultural and plantation waste by-products have good potential for use as animal feed. In order to guarantee safety and suitability, further processing and analysis is needed. Processing of raw materials is carried out in a combination (physical, chemical and biological). Preparation of feed formulations using Pearson's Quadrilateral Method. Testing is carried out in laboratories that consistently apply ISO/IEC 17025: 2017 from the National Accreditation Committee (KAN), namely the East Java Province Animal Husbandry Service. The standard test results refer to SNI 3148-2:2017 concerning Concentrate Feed for Fattening Beef Cattle. Ruminant animal feed that meets SNI 3148-2:2017 includes levels of ash, crude fat, phosphorus, TDN, aflatoxin and crude fiber. Meanwhile, the nutritional content that is close to SNI is crude protein and aNDF. The test results also showed that the content did not meet SNI, including water and calcium content. Meanwhile, fish feed (pellets) that meet SNI 01-4087-2006 contain 3 types of content including ash, crude fat and aflatoxin. The types of content that do not meet SNI are crude protein, crude fiber, phosphorus, buoyancy and pellet diameter. The estimated cost of making ruminant feed is IDR 5,986 per kilogram. Cost analysis is relevant to feed quality and daily requirements without reducing nutritional value. Further research is needed to ensure that artificial feed is more cost efficient than conventional feed.

Evaluation of different Starch Binders on physical quality of fish feed pellets.

Binders are the products that are used to bind, glue or hold the various feed ingredients together in order to maintain pellet integrity. For aqua-culturists, feed manufacturing is an expensive exercise due to the high cost of ingredients along with traditional artificial binders. The use of grain starches as aqua feed binders have advantages which include availability of that binder, nutritional contribution, and minimization of feed cost. A research trial was conducted to test physical properties such as palatability, water stability, dustiness, friability, settling velocity and floatation time of locally available starch i.e. wheat gluten, pea starch and guar gum and to assist their incorporation in on-farm aqua feed. Results revealed that among these three starch, the starch from pea source was proved superior over other two (wheat gluten and guar gum) as all physical quality parameters (dustiness, water stability and friability) revealed better performance of pea starch except pelletability in which guar gum performed best. Although not a single diet proved best in case of flotation time (Tf) and settling velocity (Vset) at varying lengths (6mm, 9mm and 12 mm). This finding indicates the significance of suitable binders for optimal water pollution and sustainable aquaculture. The use of these binders i.e. wheat gluten, pea starch and guar gum in fish feed pellets may also reduce dependence on synthetic binders and minimizes cost.

Studies on Fish Feed Formulation

Good nutrition in animal production systems is essential to produce a healthy, high-quality product economically. In fish farming, nutrition is critical because feed represents 40-50% of the production costs. Fish nutrition has advanced dramatically in recent years with the development of new, balanced commercial diets that promote optimal fish growth and health. The development of new species-specific diet formulations supports the aquaculture (fish farming) industry as it expands to satisfy increasing demand for affordable, safe, and high-quality fish and seafood products Conducted experiments on studies on fish feed formulation at CIPHET, Ludhiana. The present study evaluates the importance of fish feed pellets as alternative feed ingredients for fish feed preparation. Commonly available materials i.e., debittered mustard oil cake, fish meal, maize powder, and mineral powder mixture. The crude protein content of the feed ingredients ranged from 10 to 60 % and the crude fat contents were recorded as 4 to 12%. Crude fiber contents were between 1 and 8 % and ash contents ranged from 6.9 to 38 %. In this study, results showed that the minimum volume of pellets is 700.4 mm3 and maximum volume is 925.504 mm3 and the minimum density of pellets is 0.00092 g. mm-3 and the maximum density of pellets is 0.00107 g. mm-3 of the pellets. The 0.5838g weight of the pellet will take less time to dissolve completely when compared with more 0.9127g weight of the pellet.

Increasing Viability of Bacillus subtilis BR610 through Inulin-Loaded Synbiotic Microcapsules

This study aims to determine the growth pattern of Bacillus subtilis BR610 isolated from the intestines of Rabbitfish on broth + inulin nutrient media, the diameter of beads, encapsulation rate, absorption efficiency, and probiotic viability in synbiotic microcapsules when exposed to simulated bile and high temperature. The study was designed with a completely randomized plan. The treatments tested were inulin and alginate concentration, viability in 10% bile, temperatures of 70oC and 90oC. An overview of granular synbiotic microcapsules is presented in the form of images, while the quantitative data obtained was processed using ANOVA with the help of the SPSS application. BR610 synbiotic microcapsule beads are round to oval in shape, transparent white in color, and the granules' elasticity increases with increasing alginate concentration. Statistical test results showed that 1% inulin significantly increased the population of B. subtilis BR610, a diameter of beads 0.9-3 mm, viability of probiotics in beads was 7.776 ± 0.06 log CFU/mL. The highest rate and efficiency of encapsulation and survival of probiotics on simulated were obtained from beads with 2% alginate and 1% inulin concentration. Synbiotic microcapsules can protect probiotics from environmental stress. This research serves as a scholarly resource on the utilization of probiotics in diverse domains, including fish feed production. It is well-established that the temperature within the feed molding apparatus can exceed 70oC during the fabrication of fish feed pellets. However, this is no longer a hindrance due to the implementation of alginate coating on probiotics.

Increasing Viability of Bacillus subtilis BR610 through Inulin-Loaded Synbiotic Microcapsules

This study aims to determine the growth pattern of Bacillus subtilis BR610 isolated from the intestines of Rabbitfish on broth + inulin nutrient media, the diameter of beads, encapsulation rate, absorption efficiency, and probiotic viability in synbiotic microcapsules when exposed to simulated bile and high temperature. The study was designed with a completely randomized plan. The treatments tested were inulin and alginate concentration, viability in 10% bile, temperatures of 70oC and 90oC. An overview of granular synbiotic microcapsules is presented in the form of images, while the quantitative data obtained was processed using ANOVA with the help of the SPSS application. BR610 synbiotic microcapsule beads are round to oval in shape, transparent white in color, and the granules' elasticity increases with increasing alginate concentration. Statistical test results showed that 1% inulin significantly increased the population of B. subtilis BR610, a diameter of beads 0.9-3 mm, viability of probiotics in beads was 7.776 ± 0.06 log CFU/mL. The highest rate and efficiency of encapsulation and survival of probiotics on simulated were obtained from beads with 2% alginate and 1% inulin concentration. Synbiotic microcapsules can protect probiotics from environmental stress. This research serves as a scholarly resource on the utilization of probiotics in diverse domains, including fish feed production. It is well-established that the temperature within the feed molding apparatus can exceed 70oC during the fabrication of fish feed pellets. However, this is no longer a hindrance due to the implementation of alginate coating on probiotics.

HAEMATOLOGY OF SALINE TILAPIA (Oreochromis niloticus) FED WITH MORINGA LEAF POWDER ENRICHED PELLETS

Moringa leaves (Moringa oleifera) contain flavonoids and saponins that can help improve fish health. Fish health and immune conditions can be predicted based on fish haematology. The study aimed to determine the effects of powder addition of Moringa leaves in fish feed pellets on the haematological disorders of saline tilapia. It was carried out from July to August 2022. Moringa leaf flour was mixed well with pelleted feed, and the dose of Moringa leaf flour was as follows: 0 (Control, without the addition of Moringa leaves), P1 (10 g/kg), P2 (15 g/kg), and P3 (20 g/kg). Fish were stored in round plastic containers (25 L, equipped with an aerator and circulation pump) for 42 days, 15 fish/container. During the study, fish were fed three times/day at satiation. Sampling was carried out twice, namely before treatment and at the end of the experiment (day 42). The results showed that adding Moringa leaf flour to fish feed pellets affected fish haematology. Fish fed with turmeric-enriched pellets showed a higher percentage of lymphocytes, increasing the fish's immunity. The best treatment was P2, which showed 81.66% lymphocytes, 7.11% monocytes, 8.66% neutrophils, and 2.55% thrombocytes. Data obtained showed that fish fed with Moringa leaf pellets had better haematological conditions than fish not fed with Moringa leaf pellets

Holothurians play an important role in mitigating the impacts of aquaculture on sediment conditions

As deposit feeders contribute to bioremediation and nutrient recycling in sediments, positively impacting water and sediment quality, holothurians are candidate organisms for multitrophic aquaculture. This study aimed to investigate the potential of Holothuria poli to reduce the environmental footprint of fish farms through a benthocosm experiment. The experimental setup included four benthocosms with holothurians(H+) and four without (H-). The 58-day experiment included two phases: constant organic enrichment and recovery. In order to simulate the organic enrichment sediment conditions under a typical fish farm, a mixture of fish feces and fish feed pellets was added. Results showed that holothurians effectively reduced organic matter and H2S and increased redox, RPD depth and sediment oxygenation, thereby preventing anoxic conditions. Also, during the recovery phase, holothurians facilitated rapid sediment recovery, while the sediments without holothurians remained organic-enriched until the end of the experiment. The study emphasizes the significance of holothurians in mitigating the impacts of aquaculture on sediment conditions and so promoting environmental sustainability.

Training and Implementation of Catfish Feed Technology in the Sedana Sari Fish Farmers Group in Selat Village, Abiansemal, Badung, Bali

Catfish is one type of freshwater cultured fish that has the potential to be developed. Cultivation with advanced technology in intensive systems requires more feed intake good quality pellet feed is needed but at an affordable price. The problem of the high cost of cultivating catfish is a challenge that must be resolved. Activities were carried out in 3 stages including counseling and workshops, planning, the practice of making fish feed pellets, and monitoring and evaluating. The results in the activities of catfish farmers conveyed problems and exchanged experiences of the problems experienced. Furthermore, to find out the sustainability of the program, the team conducted monitoring and evaluation and the activities continued even though there were few problems.

Peningkatan Pendapatan Masyarakat Dengan Program Inovasi Desa Melalui Pengolahan Limbah Ikan Curah

The purpose of this community service is to test and train the community on the technology of making high protein fish feed pellets from trash fish waste which is useful for reducing the high purchase of fish feed on the market. Therefore, the need for a technology or innovation for the manufacture of fish feed in the community, especially areas where there is fish farming and is expected to reduce the high cost of purchasing feed. The method consists of presentations or training, mentoring and discussions, as well as analysis of business benefits. Members of the catfish breeding partners are mostly aged between 18 to 68 years, have elementary, junior high and high school education. The raw materials for the waste are 5 kg of dry trash fish, 100 g of tapioca flour/0.1 kg, 4.9 kg of rice bran and 1 l of diesel oil and plastic, so you can get up to 8 kg of fish pellets. with the cost required is IDR 39,050 Gross income IDR. 72,000 and a profit of Rp. 32,950. Comparing the benefits and costs incurred is IDR 32,950.00 :I DR 39,050.00 = 0.8 (B/C). Therefore, the fish pellet business is very profitable to develop and can increase the income of the Jati Emas villagers.

Implementation of Fish Feed Pellet Making Machine for Freshwater Fish Farming Groups in RW 04 Jatibening Baru Village, Bekasi City

The partners in this Community Service Program (PkM) are a group of freshwater fish cultivators in RW 04 Jatibening Baru Village, Bekasi City. Two main problems for partners are: 1. the high cost of fish feed so that business profits are not maximized and 2. business management that is not yet optimal. The purpose of this PkM activity is to apply appropriate technology for fish feed pellet machines as a result of faculty members’ research to benefit partners. The implementation method for this PkM is: The first stage is to collect data on the need for the number of fish feed pellets from partners, which then determines the type of pellet maker that is most suitable and then manufactures the pellet maker. The next stage is conducting training to partners in making fish feed pellets and business management with the canvas business model. By carrying out this service activity, it can be concluded that: 1. partners are able to reduce the cost of fish feed by 50%, 2. partners are able to make nutritional compositions for fish feed, and 3. partners understand the basics of the canvas business model in business management.

Kidney Structure of Pangasianodon hypophthalmus Fed with Fermented Red Ginger and Infection by Aeromonas hydrophila

Red ginger contain antioxidant that can be used to enhance the immune system of fish. A study was conducted from September to December 2021 to understand the kidney structure of Pangasianodon hypophthalmus that fed with red ginger fermented pellets. The fermented red ginger juice was obtained by juicing 500 g of red ginger in 3L water, boiled and mixed with 175 ml molasses, 65 ml yogurt and 50 mg yeast and then was fermented for seven days. The fermented red ginger juice was obtained by juicing 500 g of red ginger in days. The fermented red ginger juice was mixed with fish feed pellets, namely T1 (150 mL/Kg), T2 (175 mL/Kg), T3 (200 mL/Kg), Cn (no red ginger juice and no infection), Cp (no red ginger juice and infection by A. hydrophila). The fish were reared in 30L aquaria. Fish sample was P. hypophthalmus fingerling (10-12 cm and 5-7 g), 10 fishes/aquarium. The fish were fed 3 time a day, adlibitum. In the 30th day, A. hydrophila was injected to the treated fish (0.1.ml of 108 cells/ml, subcutan injection). In the 14th after the infection kidney sample was collected and processed for histological study. Result shown that there were differences in kidney tissue of fish in each treatment. The worst condition was obtain in Cp, while the best was in T2. The renal structure of Cp showed abnormalities such as hemorrhage, cell necrosis, enlarged Bowman's cyst, and tubular degeneration, while the T2 kidney showed mild lesions specifically haemorrhagic. This fact indicates that fermented red ginger can improve fish immunity against A. hydrophila infection

Survival and Growth of Pangasianodon hypopthalmus Fed with Moringa oleifera Enriched Pellets and Reared in Tank With Aquaponic System and Dark Condition

Pangasianodon hypophthalmus grows well in a dark tank completed with an aquaponic system. To improve the growth, a feed supplement made from Moringa oleifera might be used as it is rich in protein, vitamins A, B, C, and minerals. To understand the effect of M.oleifera addition in the feed of fish, research has been conducted in June-July 2022. M. oleifera leaves were dried and powdered and then mixed with commercial fish feed pellets. There were 4 treatments of M. oleifera dosages, namely T0 (no M. oleifera), T1 (10 g/kg), T2 (15 g/kg), and T3 (20 g/kg). The fish was reared in a 100L container (30 fishes/tank, around 4 g BW and 8 cm TL), covered with a dark-colored tarp, and completed with the aquaponic system using Ipomoea aquatica. The feed was given 2 times/day, ad libitum. Samplings were conducted once/10 days, for 40 days. Results showed that the survival of fish in all treatments was 93.3 – 98.89%. The growth of fish, however, was different. There was no difference in fish body weight (BW), total length (TL), and specific growth rate (SGR) of fish fed with Moringa, they were around 23.5 g BW, 5.8 cm TL, and 4.3 cm SGR respectively. While those of the control fish were 13.0 g BW, 4.23 cm TL, and 2.89% per day SGR respectively. The fish that was fed with Moringa-enriched pellets showed the highest Feed Efficiency (90.42-97.46%) and the lowest FCR (1.03 – 1.11). While in the fish that was not fed with Moringa showed the lowest FE (75.48%) and the highest FCR (1.33%). Data obtained indicate that Moringa positively improves the growth of fish as well as improving feed efficiency

Performance investigation of a novel design of vertical micro-screen drum filter for a recirculating aquaculture system (RAS)

The present study proposes a new design of mechanical filter to suit the recirculating aquaculture system (RAS) as a high-efficiency alternative filter to the conventional swirl separator (CSS). The new filter is considered the developed version of CSS; thus, it is called thereafter as the swirl-vertical drum filter (SVDF) which is provided with a rotating vertical micro-screen drum equipped with a fixed vertical brush as a self-cleaning tool instead of the conventional backwash system. The performance of SVDF was evaluated under different drum rotational speeds, and drum rotation times using sinking and floating fish feed pellets and magnetic field device, and then, it was compared to CSS in terms of water quality and filtration efficiency under the same operational conditions. Experimental results showed better values of water quality including Dissolved oxygen (DO), pH and unionized ammonia (NH3). Also, the lowest value of COD was found to be 18.33 mg/L by using SVDF with floating feed pellets, whilst the highest value of 100.73 mg/L was found in the case of using the CSS with sinking pellets. Meanwhile, the magnetic field device had no effect on the filtration process. The lowest surface area of the vertical micro-screen drum of 0.217 ± 0.013 m2 was obtained at the drum’s rotational speed of 20 rpm (0.39 m/s), rotation time of 150 min with floating feed pellets. Experimentally, it is found that the new SVDF has higher filtration efficiency than the CSS by about 57.57% under the same operational conditions.

Microencapsulation of Piscirickettsia salmonis Antigens for Fish Oral Immunization: Optimization and Stability Studies.

The development of fish oral vaccines is of great interest to the aquaculture industry due to the possibility of rapid vaccination of a large number of animals at reduced cost. In a previous study, we evaluated the effect of alginate-encapsulated Piscirickettsia salmonis antigens (AEPSA) incorporated in feed, effectively enhancing the immune response in Atlantic salmon (Salmo salar). In this study, we seek to characterize AEPSA produced by ionic gelation using an aerodynamically assisted jetting (AAJ) system, to optimize microencapsulation efficiency (EE%), to assess microparticle stability against environmental (pH, salinity and temperature) and gastrointestinal conditions, and to evaluate microparticle incorporation in fish feed pellets through micro-CT-scanning. The AAJ system was effective in obtaining small microparticles (d < 20 μm) with a high EE% (97.92%). Environmental conditions (pH, salinity and temperature) generated instability in the microparticles, triggering protein release. 62.42% of the protein content was delivered at the intestinal level after in vitro digestion. Finally, micro-CT-scanning images confirmed microparticle incorporation in fish feed pellets. In conclusion, the AAJ system is effective at encapsulating P. salmonis antigens in alginate with a high EE% and a size small enough to be incorporated in fish feed and produce an oral vaccine.

The Effects of Turmeric Powder Addition in Fish Feed toward Hematology of Common Carp (Cyprinus carpio)

Turmeric (Curcuma longa) contains curcumin that can be used to improve the health as well as the immune system of the fish. The health and immune system condition of the fish can be predicted based on the hematology of the fish. A study that aims to understand the effects of turmeric addition in fish feed pellets on the hematology condition of common carp has been conducted from March to May 2022. The turmeric powder was mixed well with the feed pellets and the dosages of the turmeric powder were as follows: 0 (Control, no turmeric addition), P1 (0.5 g/kg), P2 (1 g/kg), and P3 (1.5 g/kg). The fish was reared in circular plastic containers (25 L), completed with an aerator and circulation pump) for 49 days, 15 fish/ container. During the research, the fish was fed 3 times/ day, at satiation. Samplings were conducted 2 times before the treatment was applied and by the end of the experiment (the 49th day). Results show that the addition of turmeric powder in the fish feed pellets clearly affects the hematological of the fish. Fish that was fed with turmeric-enriched pellets showed a higher percentage of lymphocyte and which means that the immunity of the fish is improved. The best treatment P3 showed 81.55% lymphocyte, 6.55% monocyte, 5.44% neutrophil, and 5.44% thrombocyte. Data obtained indicate that the fish fed with turmeric pellets perform better in hematological conditions than the fish with no turmeric-enriched pellets.

Implementation of two-function fish pellet machine for empowerment of fish cultivator group Gelondoro Sidoarjo

In the post-Covid-19 pandemic, the Gelondoro fish cultivator group, Jabon Sidoarjo District, had difficulties meeting fish feed pellets' needs. This difficulty is caused by the increase in the price of fish feed pellets; both groups of fish cultivators have very little knowledge of making fish feed pellets. The purpose of this community service activity is to empower the Gelondoro farmer group to produce fish feed pellets independently to meet their needs without depending on factory feed. The method used in this community service activity is to provide socialization regarding the formulation of fish feed pellets with high protein. The second is to provide a fish feed pellet machine with two functions: mixing and printing in one tool. The third demonstrates the manufacture of fish feed pellets. The result of this community service activity is that Gelondoro fish cultivators have known the formulation of a mixture of making fish pellets as well as practicing how to make fish feed pellets using a two-function fish pellet printing machine.

The choice of rational modes of vacuum deposition of fatty components in the preparation of feed for valuable fish species

The subject of research is kinetics of vacuum deposition of liquid components on extruded fish feed pellets. The kinetic regularities of the vacuum deposition process under investigation are established and the choice of rational modes of vacuum deposition of fat components in preparing compound feeds for valuable fish species is justified. The use of vacuum deposition of fat components on extruded feed for valuable fish species has led to the possibility of increasing the fat content up to 40 %, reducing the crushing of feed by 10 %. Improving the physical characteristics of finished compound feed (a moisture content of 10-12 %); increasing the penetration level of liquid components by 25-30 %; maintaining a dry surface of the extrudate; reducing pathogenic microflora to 0 are included. It was revealed that the amount of vacuum in working chamber of sprayer is the most important parameter affecting a fat leakage factor, and the amount of vacuum of 0.020 MPa provides intensive penetration and significantly reduces a fat leakage factor.