Aquaculture premix for improving digestive system and preparation method thereof

By adding probiotics, enzyme preparations and other components to the aquaculture premix, and using a screen filter cartridge and crushing blade design, the problem of improvement of the digestive system and uneven mixing is solved, and the digestion and absorption capacity of aquatic animals and the preparation effect of the premix are improved.

CN120266984APending Publication Date: 2025-07-08JIANGSU SANZHI BIOTECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202510701320.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-28
Publication Date
2025-07-08

Smart Images

  • Figure CN120266984A_ABST
    Figure CN120266984A_ABST
Patent Text Reader

Abstract

The invention provides an aquaculture premix for improving a digestive system and a preparation method thereof, the aquaculture premix for improving the digestive system comprises the following components by weight: 5-20% of probiotics; 3-15% of an enzyme preparation; 1-8% of trace elements; 0.5-5% of vitamin; 0.1-2% of an antioxidant; and the balance of filler. According to the aquaculture premix for improving the digestive system and the preparation method of the aquaculture premix, disclosed by the invention, the basic requirements of aquatic animals on obtaining nutrition and improving the digestive system of the aquatic animals can be met; in addition, the mixing uniformity can be improved by preventing large-particle raw materials from directly entering the mixing device, so that the preparation effect and the feeding effect of the premix are improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention belongs to the technical field of aquaculture, and particularly relates to an aquaculture premix for improving the digestive system and a preparation method thereof. Background Art

[0002] In aquaculture, in order to improve the growth rate and health status of aquatic animals such as fish and shrimp, premixes are usually used. However, traditional premixes mainly focus on providing sufficient nutrients, while ignoring the improvement of the digestive system. This can easily lead to problems such as indigestion of the cultured aquatic animals, low absorption efficiency of feed, and decreased immunity.

[0003] Existing aquaculture premixes, although able to meet the requirements of sufficient nutrition and improvement of the digestive system, during the process of mixing and processing various raw materials, the raw materials are often directly added to the mixing device for mixing treatment, and the granular raw materials are not sieved during the feeding process. Therefore, it is very easy for large granular raw materials generated due to caking and other reasons to directly enter the mixing device, resulting in the uniformity of raw material mixing, and further affecting the preparation effect of the premix. Thus, it cannot fully meet the usage requirements of people. Summary of the Invention

[0004] In view of this, in order to overcome the deficiencies of the prior art, the present invention provides an aquaculture premix for improving the digestive system and a preparation method thereof, which can not only meet the basic needs of aquatic animals to obtain nutrients and improve their digestive systems, but also improve the mixing uniformity by avoiding large granular raw materials from directly entering the mixing device, thereby improving the preparation effect and feeding effect of the premix.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: an aquaculture premix for improving the digestive system, comprising the following components in weight percentages:

[0006] Probiotics 5 - 20%;

[0007] Enzyme preparations 3 - 15%;

[0008] Trace elements 1 - 8%;

[0009] Vitamins 0.5 - 5%;

[0010] Antioxidants 0.1 - 2%;

[0011] Filler the balance.

[0012] As a further improvement of the present invention, the probiotics are one or more of lactic acid bacteria, bacillus or yeast;

[0013] The enzyme preparation includes one or more of protease, amylase, and cellulase;

[0014] The trace elements include one or more of zinc, copper, iron, and selenium;

[0015] The vitamins include one or more of vitamin A, vitamin D3, vitamin E, and vitamin C;

[0016] The antioxidant is one or two of phytic acid or tea polyphenols;

[0017] The filler is one or two of medical stone particles or zeolite particles.

[0018] A preparation method of an aquaculture premix for improving the digestive system as described in claim 1 or 2, comprising the following steps:

[0019] S1, weighing each component according to the formula;

[0020] S2, uniformly mixing the probiotic bacteria and the enzyme preparation to obtain a first mixture;

[0021] S3, uniformly mixing the trace elements, vitamins, and antioxidants to obtain a second mixture;

[0022] S4, adding the first mixture and the second mixture into a mixing device and mixing them uniformly, and then adding the filler into the mixing device and stirring and mixing to obtain the premix.

[0023] As a further improvement of the present invention, in steps S2 and S3, the stirring time is 10 - 30 minutes.

[0024] As a further improvement of the present invention, in step S4, the mixing device used includes a mixing tank. The bottom of the mixing tank is provided with support legs and a discharge pipe, and a control valve is provided on the discharge pipe. The top of the mixing tank is detachably provided with a top cover. The middle of the top cover is provided with a third feed hopper for adding the filler, and the top cover is also provided with a first feed hopper for adding the first mixture and a second feed hopper for adding the second mixture. A sieve filter cylinder is also provided in the mixing tank below the third feed hopper. The bottom of the sieve filter cylinder penetrates and rotatably arranges a stirring cylinder. Crushing blades for crushing large particle fillers in the sieve filter cylinder are provided on the stirring cylinder. A top plate capable of vertically lifting and adjusting is also provided on the upper side of the mixing tank. A stirring shaft passing through the stirring cylinder is rotatably arranged on the top plate. Stirring blades adapted to the mixing tank are provided on the stirring shaft. A first dredging rod for dredging the first feed hopper, a second dredging rod for dredging the second feed hopper, and a third dredging rod for dredging the vertical cylinder of the third feed hopper are also provided on the stirring shaft through a cross bar.

[0025] As a further improvement of the present invention, a telescopic push rod is vertically arranged on the top cover. The upper end of the output shaft of the telescopic push rod is connected to the top plate. A connecting socket tube is also arranged on the top cover, and a connecting socket rod inserted into the connecting socket tube is arranged on the top plate.

[0026] As a further improvement of the present invention, a first driving motor is also arranged on the top cover. The output shaft of the first driving motor is connected to the mixing drum through a first gear transmission assembly.

[0027] As a further improvement of the present invention, a second driving motor is also arranged on the top plate. The output shaft of the second driving motor is connected to the stirring shaft through a second gear transmission assembly.

[0028] As a further improvement of the present invention, the top cover is clamped to the upper end of the mixing tank. A fastening bolt for screwing the mixing tank is also arranged on the top cover, and a threaded fastening hole screwed with the fastening bolt is arranged on the mixing tank.

[0029] As a further improvement of the present invention, a transparent observation window is also arranged on the mixing tank. Through the transparent observation window, the mixing condition in the mixing tank can be conveniently viewed.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] First, the addition of probiotics and enzyme preparations helps to improve the digestion and absorption ability of aquatic animals for feed and enhance intestinal health; the reasonable ratio of trace elements and vitamins can meet the nutritional components required for the growth of aquatic animals.

[0032] Second, by avoiding large particle raw materials from directly entering the mixing device and combining the design of the sieve filter cylinder and the crushing blade, the problem of uneven mixing is effectively solved; the multi-step mixing process ensures the full mixing of each component, improves the overall quality of the premix, and the uniform premix can better meet the nutritional needs of aquatic animals, thereby improving the growth rate and survival rate.

[0033] Third, during the process of adding the first mixture through the first feed hopper and adding the second mixture through the second feed hopper, the stirring shaft and the dredging rod are driven to move upward until the first dredging rod is inserted into the first feed hopper and the second dredging rod is inserted into the second feed hopper. Then, the stirring shaft, the first dredging rod, and the second dredging rod are driven to move vertically up and down to respectively dredge the first feed hopper, the second feed hopper, and the third feed hopper, ensuring the smooth feeding of the first mixture, the second mixture, and the filler.

[0034] Fourthly, the fillers entering the mixing tank through the third feed hopper will first fall into the sieve filter cylinder for sieving treatment. The large-particle fillers will be intercepted because they cannot pass through the filter holes of the sieve filter cylinder. Then, the stirring cylinder and the crushing blades can be driven to operate to crush the large-particle fillers. During the process of sieving the fillers by using the sieve filter cylinder, the stirring cylinder and the crushing blades can also be driven to rotate intermittently to agitate the fillers, thereby avoiding affecting the filtration efficiency due to the blockage of the filter holes of the sieve filter cylinder by the fillers. Brief Description of the Drawings

[0035] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0036] Figure 1 is a schematic structural diagram of the present invention;

[0037] Figure 2 is a schematic structural diagram of the stirring shaft, stirring blades, cross bar, first dredging rod, second dredging rod and third dredging rod of the present invention;

[0038] Figure 3 is a schematic structural diagram of the stirring cylinder, stirring shaft and stirring blades of the present invention;

[0039] Figure 4 is a schematic structural diagram of the sieve filter cylinder, stirring cylinder, crushing blades and sealing ring of the present invention.

[0040] In the figure: 101, mixing tank; 102, support leg; 103, discharge pipe; 104, control valve; 105, top cover; 106, third feed hopper; 107, first feed hopper; 108, second feed hopper; 109, sieve filter cylinder; 110, stirring cylinder; 111, crushing blades; 112, top plate; 113, stirring shaft; 114, stirring blades; 115, cross bar; 116, first dredging rod; 117, second dredging rod; 118, third dredging rod; 119, bearing; 120, cross plate; 201, telescopic push rod; 202, connecting socket; 203, connecting plug; 301, fastening bolt; 302, transparent observation window; 303, sealing ring. Specific Embodiments

[0041] To better understand the present invention, the content of the present invention will be further clearly described below in conjunction with embodiments. However, the protection scope of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are given to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0042] An aquaculture premix for improving the digestive system, comprising the following components in percentage by weight:

[0043] Probiotics: 5 - 20%

[0044] Enzyme preparation: 3 - 15%

[0045] Trace elements: 1 - 8%

[0046] Vitamins: 0.5 - 5%

[0047] Antioxidants: 0.1 - 2%

[0048] Filler: the balance

[0049] The probiotics are one or more of lactic acid bacteria, bacillus or yeast;

[0050] The enzyme preparation includes one or more of protease, amylase and cellulase;

[0051] The trace elements include one or more of zinc, copper, iron and selenium;

[0052] The vitamins include one or more of vitamin A, vitamin D3, vitamin E and vitamin C;

[0053] The antioxidants are one or two of phytic acid or tea polyphenols;

[0054] The filler is one or two of medical stone particles or zeolite particles.

[0055] A method for preparing an aquaculture premix for improving the digestive system as claimed in claim 1 or 2, comprising the following steps:

[0056] S1, weighing each component according to the formula;

[0057] S2, mixing the probiotics and the enzyme preparation evenly to obtain a first mixture;

[0058] S3, mixing the trace elements, vitamins and antioxidants evenly to obtain a second mixture;

[0059] S4, adding the first mixture and the second mixture to a mixing device and mixing evenly, then adding the filler to the mixing device and stirring and mixing to obtain the premix. In steps S2 and S3, the stirring time is 10 - 30 minutes.

[0060] One embodiment of the present application is: weighing the following components according to the formula:

[0061] Probiotics: 15%

[0062] Enzyme preparation: 10%

[0063] Trace elements: 5%

[0064] Vitamins: 3%

[0065] Antioxidants: 1%

[0066] Filler: 66%

[0067] Mix the probiotics (Lactic acid bacteria and Bacillus) and enzyme preparations (Protease and Amylase) evenly to obtain the first mixture.

[0068] Mix the trace elements (Zinc and Copper), vitamins (Vitamin A and Vitamin D3), and antioxidants (Phytic acid and Tea polyphenols) evenly to obtain the second mixture.

[0069] Mix the first mixture and the second mixture evenly, then add the filler (zeolite particles and picrolite particles with a component ratio of 1:1), and stir for 20 minutes.

[0070] Use the above mixing device for the mixing operation to ensure that each component is fully mixed, and finally obtain a uniform premix.

[0071] As Figure 1 , 3 As shown in Figures 4, the mixing device used includes a mixing tank 101. The lower end of the mixing tank 101 is conical. The bottom of the mixing tank 101 is provided with support legs 102 and a discharge pipe 103. A control valve 104 is provided on the discharge pipe 103. The top of the mixing tank 101 is detachably provided with a top cover 105. A third feed hopper 106 for adding filler is provided in the middle of the top cover 105. A first feed hopper 107 for adding the first mixture and a second feed hopper 108 for adding the second mixture are also provided on the top cover 105. A sieve filter cylinder 109 located below the third feed hopper 106 is provided in the mixing tank 101 through a horizontal plate 120. The bottom of the sieve filter cylinder 109 is penetrated and rotatably provided with a stirring cylinder 110. Crushing blades 111 for crushing large particle fillers in the sieve filter cylinder 109 are provided on the stirring cylinder 110. A top plate 112 that can be vertically lifted and adjusted is also provided on the upper side of the mixing tank 101. A stirring shaft 113 passing through the stirring cylinder 110 is rotatably provided on the top plate 112. A bearing 119 is provided on the top plate 112. The outer ring of the bearing 119 is connected to the bottom wall of the top plate 112. The inner ring of the bearing 119 is connected to the outer side wall of the stirring shaft 113. The stirring shaft 113 also passes upward through the top plate 112. A through hole rotatably connected to the stirring shaft 113 is provided on the top plate 112;

[0072] As Figure 1 , 2, as shown in Figure 4, the stirring shaft 113 is misaligned with the third feed hopper 106. A stirring blade 114 adapted to the mixing tank 101 is provided on the stirring shaft 113. A first dredging rod 116 for dredging the first feed hopper 107, a second dredging rod 117 for dredging the second feed hopper 108, and a third dredging rod 118 for dredging the vertical cylinder of the third feed hopper 106 are also provided on the stirring shaft 113 through a cross bar 115.

[0073] At the upper end of the inner side wall of the mixing drum 110, a sealing ring 303 rotatably connected to the stirring shaft 113 is further provided. Through the sealing ring 303, it is possible to prevent the filler from entering the gap between the mixing drum 110 and the stirring shaft 113.

[0074] Workers can add the first mixture into the mixing tank 101 through the first feed hopper 107, and add the second mixture into the mixing tank 101 through the second feed hopper 108. During the above feeding process, the stirring shaft 113 and the dredging rod can be driven to move upward a certain distance until the first dredging rod 116 is inserted into the first feed hopper 107 from bottom to top, the second dredging rod 117 is inserted into the second feed hopper 108 from bottom to top, and the third dredging rod 118 is inserted into the third feed hopper 106. Then, the stirring shaft 113 is driven to move up and down, and the first dredging rod 116, the second dredging rod 117, and the third dredging rod 118 are driven to move vertically up and down through the cross bar 115. The first mixture in the first feed hopper 107 is stirred and dredged by the first dredging rod 116, and the second mixture in the second feed hopper 108 is stirred and dredged by the second dredging rod 117 to ensure that the first mixture and the second mixture can smoothly enter the mixing tank 101.

[0075] After that, the stirring shaft 113 can be driven to move downward a certain distance first, the first dredging rod 116 is separated from the first feed hopper 107, the second dredging rod 117 is separated from the second feed hopper 108, and the third dredging rod 118 is separated from the third feed hopper 106. Subsequently, the stirring shaft 113 is driven to rotate, and the stirring blade 114 is driven to stir and mix the first mixture and the second mixture in the mixing tank 101.

[0076] After that, the filler can be added into the third feed hopper 106. The filler will first fall into the sieve cylinder 109. During the above feeding process, the third dredging rod 118 can be driven to be inserted into the third feed hopper 106 from bottom to top first, and then the stirring shaft 113 is driven to move vertically up and down, so as to drive the third dredging rod 118 to stir and dredge the filler in the third feed hopper 106, so that the filler can smoothly and quickly leave the third feed hopper 106.

[0077] The filler of small particles will directly pass through the sieve holes of the sieve filter cylinder 109 and continue to fall into the lower side inside the mixing tank 101. The filler of large particles will stay in the sieve filter cylinder 109 because it cannot pass through the sieve holes of the sieve filter cylinder 109. During this sieving process, the stirring cylinder 110 can be driven to rotate intermittently, driving the crushing blade 111 to stir the filler indirectly, so as to perform the sieving process. The large-particle filler will be intercepted because it cannot pass through the filter holes of the sieve filter cylinder 109. Then, the stirring cylinder 110 and the crushing blade 111 can be driven to operate to crush the large-particle filler; during the process of sieving the filler by using the sieve filter cylinder 109, the stirring cylinder 110 and the crushing blade 111 can also be driven to rotate intermittently to stir the filler, so as to avoid affecting the filtering efficiency due to the blockage of the filter holes of the sieve filter cylinder 109 by the filler.

[0078] When there is a relatively large amount of large-particle filler intercepted in the sieve filter cylinder 109, the stirring cylinder 110 can be driven to rotate, driving the crushing blade 111 to crush the large-particle filler. The crushed filler will then pass through the sieve holes of the sieve filter cylinder 109 for discharging.

[0079] Then, the stirring shaft 113 can be driven to move downward by a certain distance, driving the first dredging rod 116 to separate from the first feed hopper 107, the second dredging rod 117 to separate from the second feed hopper 108, and the third dredging rod 118 to separate from the third dredging rod 118. Subsequently, the stirring shaft 113 is driven to rotate, driving the stirring blades 114 to stir and mix the first mixture, the second mixture and the filler in the mixing tank 101 to prepare the premix.

[0080] After that, just open the control valve 104, and the premix can be discharged through the discharge pipe 103.

[0081] During the process of mixing the first mixture and the second mixture by the rotating stirring shaft 113 and the stirring blades 114, the top plate 112, the stirring shaft 113 and the stirring blades 114 can also be driven to move vertically up and down, so as to more fully stir and mix the first mixture and the second mixture.

[0082] During the process of mixing the first mixture, the second mixture and the filler by the rotating stirring shaft 113 and the stirring blades 114, the top plate 112, the stirring shaft 113 and the stirring blades 114 can also be driven to move vertically up and down, so as to more fully stir and mix the first mixture, the second mixture and the filler.

[0083] According to another embodiment of the present invention, as Figure 1As shown, a telescopic push rod 201 is vertically arranged on the top cover 105. The upper end of the output shaft of the telescopic push rod 201 is connected to the top plate 112. A connecting socket cylinder 202 is also arranged on the top cover 105, and a connecting plug rod 203 inserted into the connecting socket cylinder 202 is arranged on the top plate 112. Just drive the output shaft of the telescopic push rod 201 to extend upward by a certain length, and under the vertical plug-in fit of the connecting plug rod 203 and the connecting socket cylinder 202, the top cover 105 and the stirring shaft 113 can be stably driven to move upward; just drive the output shaft of the telescopic push rod 201 to shorten downward by a certain length, and under the vertical plug-in fit of the connecting plug rod 203 and the connecting socket cylinder 202, the top cover 105 and the stirring shaft 113 can be stably driven to move downward.

[0084] According to another embodiment of the present invention, a first driving motor is further arranged at the bottom of the sieve filter cylinder 109. The output shaft of the first driving motor is connected to the stirring cylinder 110 through a first gear transmission assembly. The first gear transmission assembly includes a first driving gear arranged on the output shaft of the first driving motor and a first driven gear arranged on the stirring cylinder 110 and meshing with the first driving gear. Just start the first driving motor, and through the transmission cooperation of the first driving gear and the first driven gear, the stirring cylinder 110 can be driven to rotate and operate.

[0085] According to another embodiment of the present invention, a second driving motor is further arranged on the top plate 112. The fixed end of the second driving motor is connected to the top wall of the top plate 112. The output shaft of the second driving motor passes through the top plate 112. A through hole rotatably connected to the output shaft of the second driving motor is arranged on the top plate 112. The output shaft of the second driving motor is connected to the stirring shaft 113 through a second gear transmission assembly. The second gear transmission assembly includes a second driving gear arranged on the output shaft of the second driving motor and a second driven gear arranged on the stirring shaft 113 and meshing with the second driving gear. Just start the second driving motor, and through the transmission cooperation of the second driving gear and the second driven gear, the stirring shaft 113 can be driven to rotate and operate.

[0086] According to another embodiment of the present invention, as Figure 1 shown, the top cover 105 is clamped with the upper end of the mixing tank 101. A fastening bolt 301 for screwing the mixing tank 101 is further arranged on the top cover 105, and a threaded fastening hole screwed with the fastening bolt 301 is arranged on the mixing tank 101. Just make the top cover 105 clamped with the mixing tank 101, and then drive the fastening bolt 301 to pass through the side wall of the top cover 105 and be screwed with the threaded fastening hole, and the flexible fixation of the top cover 105 and the mixing tank 101 can be realized.

[0087] According to another embodiment of the present invention, as Figure 1As shown, a transparent observation window 302 is further provided on the mixing tank 101. Through the transparent observation window 302, the mixing condition in the mixing tank 101 can be conveniently viewed.

[0088] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An aquaculture premix for improving the digestive system, characterized in that: Comprising components in the following weight percentages: Probiotics 5 - 20%; Enzyme preparation 3 - 15%; Trace elements 1 - 8%; Vitamins 0.5 - 5%; Antioxidants 0.1 - 2%; Filler the balance.

2. The aquaculture premix for improving the digestive system according to claim 1, wherein: The probiotics are one or more of lactic acid bacteria, bacillus or yeast; The enzyme preparation includes one or more of protease, amylase and cellulase; The trace elements include one or more of zinc, copper, iron and selenium; The vitamins include one or more of vitamin A, vitamin D3, vitamin E and vitamin C; The antioxidant is one or two of phytic acid or tea polyphenols; The filler is one or two of zeolite particles or zeolite particles.

3. A preparation method of an aquaculture premix for improving the digestive system as described in claim 1 or 2, characterized in that: Including the following steps: S1, Weigh each component according to the formula; S2, Mix the probiotics and the enzyme preparation evenly to obtain a first mixture; S3, Mix the trace elements, vitamins and antioxidants evenly to obtain a second mixture; S4, Add the first mixture and the second mixture to a mixing device and mix evenly, then add the filler to the mixing device and stir to mix, thus obtaining the premix.

4. The preparation method of the aquaculture premix for improving the digestive system according to claim 3, characterized in that: In steps S2 and S3, the stirring time is 10 - 30 minutes.

5. The preparation method of the aquaculture premix for improving the digestive system according to claim 3, characterized in that: In step S4, the mixing device used includes a mixing tank. The bottom of the mixing tank is provided with support legs and a discharge pipe. A control valve is provided on the discharge pipe. The top of the mixing tank is detachably provided with a top cover. In the middle of the top cover, there is a third feed hopper for adding the filler. On the top cover, there is also a first feed hopper for adding the first mixture and a second feed hopper for adding the second mixture. In the mixing tank, there is also a sieve filter cylinder located below the third feed hopper. The bottom of the sieve filter cylinder penetrates and rotatably arranges a stirring cylinder. Crushing blades for crushing large - particle fillers in the sieve filter cylinder are provided on the stirring cylinder. On the upper side of the mixing tank, there is also a top plate that can be vertically lifted and adjusted. A stirring shaft passing through the stirring cylinder is rotatably arranged on the top plate. Stirring blades adapted to the mixing tank are provided on the stirring shaft. On the stirring shaft, there are also a first dredging rod for dredging the first feed hopper, a second dredging rod for dredging the second feed hopper and a third dredging rod for dredging the third feed hopper through a cross bar.

6. The preparation method of the aquaculture premix for improving the digestive system according to claim 5, wherein: A telescopic push rod is vertically arranged on the top cover. The upper end of the output shaft of the telescopic push rod is connected to the top plate. A connecting socket cylinder is also provided on the top cover. A connecting plug rod inserted into the connecting socket cylinder is provided on the top plate.

7. The preparation method of the aquaculture premix for improving the digestive system according to claim 6, characterized in that: A first driving motor is also provided on the top cover. The output shaft of the first driving motor is connected to the stirring cylinder through a first gear transmission assembly.

8. The preparation method of the aquaculture premix for improving the digestive system according to claim 7, characterized in that: A second driving motor is also provided on the top plate. The output shaft of the second driving motor is connected to the stirring shaft through a second gear transmission assembly.

9. The preparation method of the aquaculture premix for improving the digestive system according to claim 8, characterized in that: The top cover is clamped to the upper end of the mixing tank. Tightening bolts for screwing the mixing tank are also provided on the top cover. Threaded fastening holes for screwing the tightening bolts are provided on the mixing tank.

10. The preparation method of the aquaculture premix for improving the digestive system according to claim 8, characterized in that: A transparent observation window is also provided on the mixing tank.