Bacteria-algae symbiotic culture equipment

By designing the symbiotic culture equipment for bacterial and algae collected by automatic loading and filtration separation, the problem of difficulty in automatic loading and filtration separation in the prior art is solved, and efficient cultivation of bacterial and algae and guaranteeing the purity and effect of the product is achieved.

CN222781593UActive Publication Date: 2025-04-22HENAN UNIV OF ANIMAL HUSBANDRY & ECONOMY

Patent Information

Application Number
CN202421378701.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-04-22
Estimated Expiration
2034-06-17

AI Technical Summary

Technical Problem

Existing bacterial and algae symbiosis cultivation equipment is difficult to achieve automatic loading, filtration, separation and collection, resulting in untimely addition of nutrients, easy air pollution from raw materials, and difficult to guarantee product purity and effect.

Method used

A symbiotic culture equipment for bacterial algae including an incubator, a mixer, a storage barrel, a feed tube, a discharge tube and a filter box is designed. Automatically loading and mixing of materials through the motor-driven pulley and steel rope system; automatic filtration and collection of materials are achieved by using vacuum pumps and spherical valve systems.

Benefits of technology

Automatic loading, filtration, separation and collection of materials is realized, pollution caused by materials contacting air is avoided, and the purity of bacteria and algae and product effect is ensured.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of fungus-algae culture, and discloses fungus-algae symbiotic culture equipment which comprises a culture box, a first motor is fixedly connected to the interior of the culture box, a mixer is fixedly connected to the driving end of the first motor, and a fence is fixedly connected to the inner wall of the bottom of the culture box. An inner box is fixedly connected to the inner wall of the bottom of the culture box, a second box cover is arranged at the top of the inner box, a receiver is fixedly connected to the inner wall of the bottom of the inner box, a valve assembly is fixedly connected to the outer wall of the receiver, a storage barrel is fixedly connected to the inner wall of the bottom of the inner box, and a feeding pipe is fixedly connected to the inner wall of the right side of the storage barrel. And the other end of the feeding pipe is fixedly connected with a raw material barrel, the bottom end of the rotating column is fixedly connected with a spherical valve, and the left end of the discharging pipe is fixedly connected with a collecting assembly. According to the utility model, automatic feeding of raw materials and filtering separation of collected products are realized.
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Description

Technical Field

[0001] The utility model relates to the technical field of bacteria and algae cultivation, in particular to a bacteria and algae symbiotic cultivation device. Background Art

[0002] The algae-microalgae symbiotic culture equipment is a culture system that combines microalgae and bacteria or fungi, aiming to improve wastewater treatment efficiency, biofuel production and the generation of high-value by-products through the interaction between the two.

[0003] After searching the Chinese patent document announcement number CN218539692U, a high-efficiency and low-energy consumption algae and fungi cultivation equipment is disclosed, including a cultivation tank, a support ring is arranged in the middle of the cultivation tank, and the inner circumferential array of the support ring is arranged with three fixed brackets, and the top of the intersection of the three fixed brackets is movably installed with a light source, and the surrounding circumferential array of the support ring is arranged with a glass ring tube. The utility model cooperates with the structures such as the cultivation tank, the light source and the circulating water pipe, and when irradiation is performed, the unused light source is refracted back into the glass ring tube through the reflector, thereby improving the utilization rate of the light source, and by providing a heat preservation layer, the loss of internal temperature is reduced, so that it is kept at a relatively stable temperature, so that the algae and fungi in the glass ring tube can be rapidly reproduced to form a commodity suitable for sale.

[0004] The beneficial effects mentioned in the above patent specification are as follows: "The utility model cooperates with structures such as a culture tank, a light source and a circulating water pipe. A culture tank is set up, and a support ring is set in the middle of the culture tank. Then the light source is movably installed at the intersection of three fixed brackets, so as to improve the illumination of the glass ring tubes arranged in a circumferential array around the support ring. The circulating water pipes arranged between the glass ring tubes realize the flow of water between each other, and the speed and size of the water flow are controlled by the circulating sterile box water pump. When irradiating, the light source that is not used is refracted back into the glass ring tube through the reflector, thereby improving the utilization rate of the light source. By setting a heat preservation layer, the loss of internal temperature is reduced, so that it is kept at a relatively stable temperature, so that the algae and fungi in the glass ring tube can be rapidly reproduced to form a commodity suitable for sale; the utility model Through the coordination of structures such as reflectors, movable blocks and through holes, a reflector is set and a through hole is opened on the top of the reflector, so that when in use, according to different sealing requirements and oxygen requirements, the drum is rotated to adjust the size of the movable block, thereby changing the size of the through hole, so as to achieve free control of the degree of sealing and the speed of air circulation. "Although the above patent can solve the problem that bacteria and algae are difficult to reproduce quickly to form goods suitable for sale and it is difficult to freely control the degree of sealing and the speed of air circulation, it is difficult to automatically feed materials in the prior art, which makes it difficult to add nutrients in time, and at the same time, it will cause the raw materials to contact the air, so that the raw materials are contaminated by the original bacteria in the air, and it is difficult to ensure the purity and effect of the product. In addition, it is difficult to separate and filter the products when collecting them, so that the microalgae cannot be extracted in time, which affects the effect and sale of the products. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a bacteria-algae symbiotic cultivation device, which aims to improve the problem of difficulty in automatic feeding and filtering, separation and collection.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bacteria-algae symbiotic cultivation device, comprising an incubator, the interior of the incubator is fixedly connected with a motor 1, the driving end of the motor 1 is fixedly connected with a mixer, the bottom inner wall of the incubator is fixedly connected with a fence, the bottom inner wall of the incubator is fixedly connected with an inner box, a box cover 2 is arranged on the top of the inner box, the bottom inner wall of the inner box is fixedly connected with a receiver, the outer wall of the receiver is fixedly connected with a valve assembly, the bottom inner wall of the inner box is fixedly connected with a storage barrel, the right inner wall of the storage barrel is fixedly connected with a feed pipe, the other end of the feed pipe is fixedly connected with a raw material barrel, the left side of the incubator is fixedly connected with a discharge pipe, the right end of the discharge pipe is rotatably connected with a rotating column on the outside, the top of the rotating column is threaded with a nut, the middle part of the rotating column is fixedly connected with a handle, the bottom end of the rotating column is fixedly connected with a spherical valve, and the left end of the discharge pipe is fixedly connected with a collecting assembly.

[0007] As a further description of the above technical solution:

[0008] The valve assembly includes a second motor, a driving end of the second motor is fixedly connected to a pulley one, a steel rope is sleeved on the outer side of the pulley one, a second pulley is fixedly connected to the bottom side of the inner box, a sliding column is fixedly connected to the outer side of the steel rope, an upper door is fixedly connected to the other end of the sliding column, a lower door is fixedly connected to the bottom side of the inner box, and a fixed column is fixedly connected to the bottom side of the inner box.

[0009] As a further description of the above technical solution:

[0010] The collecting assembly includes a filter box, a box cover 1 is provided on the top of the filter box, a fixed shell 2 is fixedly connected to the middle inner wall of the filter box, the top of the fixed shell 2 is detachably connected to the fixed shell 1, a plurality of buttons are slidably connected to the inside of the fixed shell 1, the outer wall of the button is fixedly connected to the sliding shell, the outer wall of the sliding shell is provided with a plurality of grooves, the bottom outer wall of the fixed shell 1 is fixedly connected to a plurality of outer shells 2, the top of the fixed shell 2 is fixedly connected to a plurality of bases, the outer wall of the base is fixedly connected to the outer shell 1, the top of the outer shell 1 is provided with a plurality of steel balls, a spring is sleeved on the outside of the outer shell 1, the bottom inner wall of the filter box is fixedly connected to a concave bottom plate, an exhaust pipe is fixedly connected to the left side of the filter box, and the other end of the exhaust pipe is fixedly connected to a vacuum pump 1.

[0011] As a further description of the above technical solution:

[0012] The top inner wall of the incubator is fixedly connected with two lamp tubes, and the bottom inner wall of the inner box is fixedly connected with a second vacuum pump.

[0013] As a further description of the above technical solution:

[0014] The outer wall of the ball valve is rotatably connected to the inner wall of the discharge pipe, and the outer wall of the right end of the discharge pipe is fixedly connected to the left side of the fence.

[0015] As a further description of the above technical solution:

[0016] The middle outer wall of the feed pipe is fixedly connected to the right side of the inner box.

[0017] As a further description of the above technical solution:

[0018] The bottom of the motor 2 is fixedly connected to the outer wall of the receiver, and the outer wall of the upper door is slidably connected to the inside of the inner box.

[0019] As a further description of the above technical solution:

[0020] The top end of the spring is in contact with the inner wall of the second shell, the bottom end of the spring is fixedly connected to the top outer wall of the base, and the left end of the discharge pipe is fixedly connected to the inner wall of the filter box.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the motor 2 is operated to drive the pulley 1 to rotate, and the pulley 2 cooperates to drive the steel rope to move upward, thereby driving the sliding column to make vertical movement on the fixed column, so as to drive the upper door to move upward, so that the material in the storage barrel automatically flows into the incubator through the pipeline and the cooperation of the lower door, and then the material is mixed evenly through the action of the mixer, thereby realizing the automatic loading of the material, avoiding the material from contacting the air and causing the material to be contaminated by bacteria in the air, and ensuring the purity of the cultured bacteria and algae.

[0023] 2. In the utility model, the air pressure at the bottom of the filter box is reduced by operating the vacuum pump, and then the handle is turned to open the spherical valve, so that the material enters the filter box from the incubator for filtration and collection. After completion, the button is pressed to open the lock structure composed of the steel ball and the groove, so that the fixed shell can be disassembled, and the filter cloth can be taken out to take out the filtered algae and water containing fungi, thereby realizing the dry and wet separation of the cultured material and facilitating the extraction and collection of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a three-dimensional diagram of a bacteria-algae symbiotic cultivation device proposed by the utility model;

[0025] Figure 2 This is a schematic diagram of the inner box structure of a bacteria-algae symbiotic cultivation device proposed by the utility model;

[0026] Figure 3This is a schematic diagram of the receiver structure of a bacteria-algae symbiotic cultivation device proposed by the utility model;

[0027] Figure 4 This is a schematic diagram of the filter box structure of a bacteria-algae symbiotic cultivation device proposed in the utility model;

[0028] Figure 5 This is a schematic diagram of the pulley structure of a bacteria-algae symbiotic cultivation device proposed by the utility model;

[0029] Figure 6 This is a schematic diagram of the button structure of a bacteria-algae symbiotic cultivation device proposed in the utility model.

[0030] Legend:

[0031] 1. Incubator; 2. Motor 1; 3. Mixer; 4. Inner box; 5. Receiver; 6. Motor 2; 7. Storage barrel; 8. Feed pipe; 9. Raw material barrel; 10. Pulley 1; 11. Steel rope; 12. Pulley 2; 13. Sliding column; 14. Upper door; 15. Lower door; 16. Fixed column; 17. Discharge pipe; 18. Rotating column; 19. Nut; 20. Handle; 21. Ball valve; 22. Box cover 1; 23. Fixed shell 1; 24. Fixed shell 2; 25. Button; 26. Sliding shell; 27. Groove; 28. Steel ball; 29. ​​Shell 1; 30. Spring; 31. Base; 32. Shell 2; 33. Lamp; 34. Box cover 2; 35. Concave bottom plate; 36. Filter box; 37. Exhaust pipe; 38. Vacuum pump 1; 39. Fence; 40. Vacuum pump 2. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 2-Figure 4, the utility model provides an embodiment: a bacteria-algae symbiotic culture device, including a culture box 1, which is the main part of the whole device, providing an environment for the growth of bacteria and algae, the interior of the culture box 1 is fixedly connected with a motor 2 for driving a mixer 3, the driving end of the motor 2 is fixedly connected with the mixer 3 to ensure that the nutrients in the culture medium are evenly distributed and promote the growth of bacteria and algae, the bottom inner wall of the culture box 1 is fixedly connected with a fence 39, the bottom inner wall of the culture box 1 is fixedly connected with an inner box 4, the top of the inner box 4 is provided with a box cover 2 34, the bottom inner wall of the inner box 4 is fixedly connected with a receiver 5 for receiving a signal to make the motor 2 6 work, the outer wall of the receiver 5 is fixedly connected with a valve assembly for regulating the entry of nutrients into the culture medium, the bottom inner wall of the inner box 4 is fixedly connected with a storage barrel 7 for storing The raw materials and nutrients required for culture are stored. A feed pipe 8 is fixedly connected to the inner wall of the right side of the storage barrel 7 to transport the materials in the raw material barrel 9 to the storage barrel 7. The other end of the feed pipe 8 is fixedly connected to the raw material barrel 9. A discharge pipe 17 is fixedly connected to the left side of the incubator 1 for discharging the contents in the incubator 1. A rotating column 18 is rotatably connected to the outer side of the right end of the discharge pipe 17. A nut 19 is threadedly connected to the top of the rotating column 18. A handle 20 is fixedly connected to the middle of the rotating column 18, and the handle 20 can be rotated to control the outflow of the fluid. The nut 19 at the top is used for tightening. A ball valve 21 is fixedly connected to the bottom end of the rotating column 18 for controlling the outflow of materials. A collecting component is fixedly connected to the left end of the discharge pipe 17, which is connected to the left end of the discharge pipe 17 for collecting and separating substances discharged from the incubator 1.

[0034] Reference Figure 1 , Figure 5 The valve assembly includes a motor 26, which provides power to control the movement of the pulley 10. The retraction and extension of the steel rope 11 can be controlled by the forward and reverse rotation of the motor, and then the up and down movement of the sliding column 13 can be controlled. The driving end of the motor 26 is fixedly connected to the pulley 10, and the outer side of the pulley 10 is covered with a steel rope 11. The pulley 2 12 is fixedly connected to the bottom side of the inner box 4. The outer side of the steel rope 11 is fixedly connected to the sliding column 13. The other end of the sliding column 13 is fixedly connected to the upper door 14, and its up and down movement can directly control the opening and closing of the upper door 14, thereby controlling the on and off of the fluid inside the storage barrel 7. The lower door 15 is fixedly connected to the bottom side of the inner box 4, and works with the upper door 14 to jointly control the flow of the fluid. The fixed column 16 is fixedly connected to the bottom side of the inner box 4, which plays a role in positioning or guiding, and ensures the precise movement of the sliding column 13.

[0035] Reference Figure 2 , Figure 3 , Figure 6The collecting assembly includes a filter box 36, and a box cover 22 is arranged on the top of the filter box 36. This is the core part of the collecting assembly, which is used to receive and process the liquid discharged from the discharge pipe 17. The box cover 22 is arranged on the top of the filter box 36 for checking and maintaining the internal structure. The middle inner wall of the filter box 36 is fixedly connected with a fixed shell 24, and the top of the fixed shell 24 is detachably connected with a fixed shell 23. The fixed shell 23 and the fixed shell 24 enable the filter cloth to be fixed in the filter box 36. The interior of the fixed shell 23 is slidably connected with a plurality of buttons 25, and the outer wall of the button 25 is fixedly connected with a sliding shell 26. The groove 27 on the sliding shell 26 and the special structure can be connected with the outer shell 29. The steel balls 28 form a detachable structure, which can separate the fixed shell 1 23 from the fixed shell 24, so as to replace the filter cloth and collect the filtered algae in time. The outer wall of the sliding shell 26 is provided with a plurality of grooves 27. The bottom outer wall of the fixed shell 1 23 is fixedly connected with a plurality of shells 2 32. The top of the fixed shell 24 is fixedly connected with a plurality of bases 31. The outer wall of the base 31 is fixedly connected with the shell 1 29. The top of the shell 1 29 is provided with a plurality of steel balls 28. The outer part of the shell 1 29 is covered with a spring 30, so that the size of the gap between the fixed shell 1 23 and the fixed shell 24 can be adjusted to adapt to filter cloths of different thicknesses. The bottom inner wall of the filter box 36 is fixedly connected. There is a concave bottom plate 35 for collecting the filtered bacteria-containing water. The left side of the filter box 36 is fixedly connected with an exhaust pipe 37. The other end of the exhaust pipe 37 is fixedly connected with a vacuum pump 38 for extracting the air at the bottom of the filter box 36, so that the material in the incubator 1 automatically flows into the filter box 36 for filtration and collection. Two lamps 33 are fixedly connected to the top inner wall of the incubator 1 to adjust the light intensity. The bottom inner wall of the inner box 4 is fixedly connected with a vacuum pump 40 to allow the material in the raw material barrel 9 to enter the storage barrel 7. The outer wall of the ball valve 21 is rotatably connected to the inner wall of the discharge pipe 17 to adjust the material in the incubator 1 to enter the filter box 36. The outer wall of the right end of the discharge pipe 17 It is fixedly connected to the left side of the fence 39, the middle outer wall of the feed pipe 8 is fixedly connected to the right side of the inner box 4, the bottom of the motor 2 6 is fixedly connected to the outer wall of the receiver 5, so that the receiver 5 can drive the motor 2 6 to work after receiving the signal, and the outer wall of the upper door 14 is slidably connected to the inside of the inner box 4, so that the material in the storage barrel 7 can flow into the incubator 1 through the opening of the upper door 14. The top of the spring 30 contacts the inner wall of the outer shell 2 32, and the bottom end of the spring 30 is fixedly connected to the top outer wall of the base 31. The size of the gap between the fixed shell 1 23 and the fixed shell 2 24 can be adjusted to adapt to filter cloths of different thicknesses. The left end of the discharge pipe 17 is fixedly connected to the inner wall of the filter box 36.

[0036] Working principle: First, start the vacuum pump 2 40, turn on the lamp 33, so that the incubator 1 is well illuminated. When the material enters the storage barrel 7 from the raw material barrel 9 through the feed pipe 8, the signal is transmitted to the receiver 5, and the receiver 5 drives the motor 2 6 to operate, drives the pulley 10 to rotate, and drives the steel rope 11 to move up and down with the cooperation of the pulley 2 12, thereby driving the sliding column 13 to make vertical movement on the fixed column 16, so as to drive the upper door 14 to move upward, so that the material in the storage barrel 7 automatically flows into the incubator 1 through the cooperation of the pipeline and the lower door 15, and at the same time, turn on the motor 1 2, thereby driving the mixer 3 to rotate, so that the material and the nutrients are fully mixed and evenly mixed, and when it is necessary to take out When filtering materials, turn on the vacuum pump 38 and wait for it to operate for a while. Turn off the vacuum pump 38 and then turn the handle 20 to align the cavity structure of the spherical valve 21 with the internal cavity of the discharge pipe 17, so that the material enters the filter box 36 from the incubator 1. After the filtration is completed, press the button 25 to make it and the sliding shell 26 move downward. When the steel ball 28 completely enters the internal cavity of the outer shell 29, the spring 30 restores its deformation to make the button 25 move upward. At the same time, the lock structure composed of the steel ball 28 and the groove 27 is opened, so that the fixed shell 23 can be disassembled, and then the filter cloth can be taken out for replacement and cleaning. The algae on the filter cloth can be taken out, and the filtered bacteria-containing water can also be taken out and collected.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bacteria-algae symbiotic culture device, comprising a culture box (1), characterized in that: The interior of the incubator (1) is fixedly connected to a motor 1 (2), the driving end of the motor 1 (2) is fixedly connected to a mixer (3), the bottom inner wall of the incubator (1) is fixedly connected to a fence (39), the bottom inner wall of the incubator (1) is fixedly connected to an inner box (4), the top of the inner box (4) is provided with a box cover 2 (34), the bottom inner wall of the inner box (4) is fixedly connected to a receiver (5), the outer wall of the receiver (5) is fixedly connected to a valve assembly, the bottom inner wall of the inner box (4) is fixedly connected to a storage barrel (7), the storage barrel A feed pipe (8) is fixedly connected to the right inner wall of (7), and the other end of the feed pipe (8) is fixedly connected to a raw material barrel (9). A discharge pipe (17) is fixedly connected to the left side of the incubator (1), and a rotating column (18) is rotatably connected to the outer side of the right end of the discharge pipe (17), and a nut (19) is threadedly connected to the top of the rotating column (18), a handle (20) is fixedly connected to the middle of the rotating column (18), a ball valve (21) is fixedly connected to the bottom end of the rotating column (18), and a collection component is fixedly connected to the left end of the discharge pipe (17).

2. The bacteria-algae symbiotic cultivation device according to claim 1, characterized in that: The valve assembly comprises a second motor (6), a driving end of the second motor (6) is fixedly connected to a first pulley (10), a steel rope (11) is sleeved on the outer side of the first pulley (10), a second pulley (12) is fixedly connected to the inner bottom side of the inner box (4), a sliding column (13) is fixedly connected to the outer side of the steel rope (11), an upper door (14) is fixedly connected to the other end of the sliding column (13), a lower door (15) is fixedly connected to the inner bottom side of the inner box (4), and a fixed column (16) is fixedly connected to the inner bottom side of the inner box (4).

3. The bacteria-algae symbiotic cultivation device according to claim 1, characterized in that: The collecting assembly comprises a filter box (36), the top of the filter box (36) is provided with a box cover (22), the middle inner wall of the filter box (36) is fixedly connected with a fixed shell (24), the top of the fixed shell (24) is detachably connected with a fixed shell (23), the interior of the fixed shell (23) is slidably connected with a plurality of buttons (25), the outer wall of the buttons (25) is fixedly connected with a sliding shell (26), the outer wall of the sliding shell (26) is provided with a plurality of grooves (27), the bottom outer wall of the fixed shell (23) is fixedly connected with a plurality of buttons (25), and the outer wall of the sliding shell (26) is fixedly connected with a plurality of grooves (27). A plurality of shells (2) (32) are connected, the top of the fixed shell (24) is fixedly connected to a plurality of bases (31), the outer wall of the base (31) is fixedly connected to the shell (29), the top of the shell (29) is provided with a plurality of steel balls (28), the outer surface of the shell (29) is covered with a spring (30), the bottom inner wall of the filter box (36) is fixedly connected to a concave bottom plate (35), the left side of the filter box (36) is fixedly connected to an exhaust pipe (37), and the other end of the exhaust pipe (37) is fixedly connected to a vacuum pump (38).

4. The bacteria-algae symbiotic cultivation device according to claim 1, characterized in that: Two light tubes (33) are fixedly connected to the top inner wall of the culture box (1), and a second vacuum pump (40) is fixedly connected to the bottom inner wall of the inner box (4).

5. The bacteria-algae symbiotic cultivation device according to claim 1, characterized in that: The outer wall of the ball valve (21) is rotatably connected to the inner wall of the discharge pipe (17), and the outer wall of the right end of the discharge pipe (17) is fixedly connected to the left side of the fence (39).

6. The bacteria-algae symbiotic cultivation device according to claim 1, characterized in that: The middle outer wall of the feed pipe (8) is fixedly connected to the right side of the inner box (4).

7. The bacteria-algae symbiotic cultivation device according to claim 2, characterized in that: The bottom of the second motor (6) is fixedly connected to the outer wall of the receiver (5), and the outer wall of the upper door (14) is slidably connected to the inside of the inner box (4).

8. The bacteria-algae symbiotic cultivation device according to claim 3, characterized in that: The top end of the spring (30) contacts the inner wall of the second housing (32), the bottom end of the spring (30) is fixedly connected to the top outer wall of the base (31), and the left end of the discharge pipe (17) is fixedly connected to the inner wall of the filter box (36).

Citation Information

Patent Citations

  • Efficient low-energy-consumption phycomycete culture equipment

    CN218539692U

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