Small solid-state fermentation reactor for bacteria with controllable oxygen content

Abstract

The utility model relates to a small-sized solid-state fermentation reactor for bacteria with controllable oxygen content, which comprises a fermentation vessel, a perforated plate is fixed at a position close to the bottom of the fermentation vessel, the upper part of the perforated plate is used for stacking solid-state stacks, and an air flowing layer is formed below the perforated plate; the side wall of the air flowing layer is connected with a ventilation device used for blowing air into the air flowing layer. A stirring structure is further arranged in the fermentation vessel, the stirring structure comprises a driving source and a spiral stirring blade arranged above the porous plate, and the driving source is used for driving the spiral stirring blade to rotate. The solid-state fermentation reactor has the effect of increasing the oxygen content in the solid-state fermentation reactor.

Description

Technical Field

[0001] The utility model relates to the technical field of solid-state fermentation equipment, in particular to a small solid-state fermentation reactor with controllable oxygen content. Background Art

[0002] Solid-state fermentation (SSF) is a process that uses an insoluble solid matrix to cultivate microorganisms. It is energy-efficient, water-efficient, and environmentally friendly. The SSF system is typically a porous medium, where microbial growth, reproduction, and metabolism primarily rely on the solid fermentation matrix, with gas as the mobile phase.

[0003] Due to the poor thermal conductivity of gas, heat transfer in the solid-state fermentation system is difficult, especially when the height of the solid pile increases. The material is affected by the stress of its own weight, which causes the pores of the material to become smaller and the air permeability to decrease. In turn, the oxygen transfer capacity and heat exchange capacity of the matrix are weakened, which in turn affects the fermentation effect.

[0004] Existing solid-state aerobic fermentation mostly uses shallow disc fermentation, and fails to combine the system's dissolved oxygen, temperature and other parameters to perform aeration treatment on the system, and fails to timely and effectively control the system's microbial metabolic efficiency, resulting in poor microbial reproduction and metabolism. Utility Model Content

[0005] Based on the above description, the utility model provides a small solid-state fermentation reactor with controllable oxygen content to solve the problem of poor microbial reproduction and metabolism caused by lack of oxygen inside the solid-state fermentation reactor.

[0006] The utility model solves the above technical problems with the following technical solutions: A small solid-state fermentation reactor with controllable oxygen content comprises a fermentation dish, wherein a porous plate is fixed near the bottom of the fermentation dish, solid materials are piled above the porous plate, and an air flow layer is formed below the porous plate;

[0007] The side wall of the air flow layer is connected to a ventilation device for blowing air into the air flow layer;

[0008] A stirring structure is further provided in the fermentation dish. The stirring structure includes a driving source and a spiral stirring blade provided above the porous plate. The driving source is used to drive the spiral stirring blade to rotate.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, a ventilation hole is provided on the side wall of the air flow layer, a filter layer is provided at the ventilation hole, and the air outlet of the ventilation device is connected to the ventilation hole.

[0011] Furthermore, a protective cover is detachably provided at the upper opening of the fermentation dish, and the protective cover includes an upper plate and a lower plate spaced apart, the upper plate is provided with a plurality of first air holes, and the lower plate is provided with a plurality of second air holes, and the plurality of first air holes and the plurality of second air holes are staggered.

[0012] Furthermore, an air suction branch pipe is connected above some of the first air vents, a main pipe is provided at one end of the air suction branch pipe away from the protective cover, multiple air suction branch pipes are connected to the main pipe, and an air suction device is provided at one end of the main pipe away from the air suction branch pipe.

[0013] Furthermore, the air intake capacity of the air intake device is smaller than the air ventilation capacity of the ventilation device.

[0014] Furthermore, a detection rod is provided in the fermentation dish, and a plurality of temperature sensing heads are provided at intervals on the detection rod. The temperature sensing heads are provided at different depths of the fermentation dish for detecting the temperature at corresponding positions.

[0015] Furthermore, a plurality of drainage grooves communicating with each other are provided on the bottom wall of the fermentation dish, and a drainage outlet communicating with the drainage grooves is provided on the side wall of the fermentation dish.

[0016] Furthermore, the diameter of the fermentation dish gradually increases toward the air flow layer.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0018] 1. The present invention provides an air flow layer at the bottom of the fermentation dish and a stirring structure inside the fermentation dish. While blowing air into the fermentation dish, the spiral stirring blades are used to stir the solid pile, thereby dissipating the heat inside the solid pile and rapidly cooling the solid pile. The heat is then quickly discharged through the ventilation device, thereby achieving the purpose of temperature and oxygen control.

[0019] 2. A protective cover is provided on the top of the fermentation dish, and an air suction device is provided on the protective cover. When the ventilation device is ventilating, the air suction device is used to suck air, which can form an air flow from bottom to top in the fermentation dish, thereby accelerating the dissipation of heat inside the fermentation dish.

[0020] 3. The protective cover is provided with an upper plate and a lower plate, and the first air holes on the upper plate and the second air holes on the lower plate are staggered, which can achieve ventilation while isolating pollutants and reduce the possibility of pollutants entering the fermentation dish. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic plan view of a small solid-state fermentation reactor for bacteria with controllable oxygen content provided by an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the cross-section structure of a fermentation dish according to an embodiment of the present invention;

[0023] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0024] 1. Fermentation dish; 11. Air flow layer; 12. Ventilation port; 13. Drainage ditch; 14. Drainage port; 2. Perforated plate; 3. Ventilation device; 4. Stirring structure; 41. Driving source; 42. Spiral stirring blade; 43. Central axis; 5. Filter layer; 6. Protective cover; 61. Upper plate; 611. First air vent; 62. Lower plate; 621. Second air vent; 7. Air suction branch pipe; 8. Main pipe; 9. Air suction device; 10. Detection rod; 101. Temperature sensor. DETAILED DESCRIPTION

[0025] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The accompanying drawings provide embodiments of the present application. However, the present application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application.

[0027] The embodiment of the present application discloses a small solid-state fermentation reactor with controllable oxygen content. Figure 1 , including a fermentation dish 1, in which a porous plate 2 is fixed near the bottom. When fermentation is carried out using the solid-state fermentation reactor of the present application, the solid pile is placed on top of the porous plate 2 to achieve fermentation of microorganisms.

[0028] Further, refer to Figure 1 The diameter of the fermentation dish 1 gradually increases from the top toward the porous plate 2, thereby forming a shape that is narrow at the top and wide at the bottom, so that the weight of the solid pile above is lighter. At the same time, the volume expansion of the solid pile is less during the fermentation process. Therefore, the shape of the fermentation dish 1 that is narrow at the top and wide at the bottom can alleviate the situation that the solid pile becomes denser under the action of its own weight, thereby reducing the air permeability, thereby increasing the oxygen content in the solid pile as much as possible.

[0029] Reference Figure 1An air flow layer 11 is formed below the porous plate 2. A ventilation opening 12 is formed on the sidewall of the air flow layer 11. A filter layer 5 is provided at the ventilation opening 12. After the ventilation opening 12 is blocked by the filter layer 5, the ventilation opening 12 is further connected to a ventilation device 3, which can be a blower. The ventilation device 3 blows air into the fermentation dish 1. The blown air passes through the filter layer 5 to filter out bacteria before entering the fermentation dish 1.

[0030] Clean air is continuously introduced into the fermentation dish 1 through the ventilation device 3, which can increase the oxygen content in the fermentation dish 1 on the one hand, and reduce the temperature in the fermentation dish 1 on the other hand, making it easier to control the fermentation environment in the fermentation dish 1 and promote the growth and reproduction of microorganisms.

[0031] Further, refer to Figure 1 The fermentation dish 1 is also provided with a stirring structure 4, which includes a central shaft 43, a driving source 41, and spiral stirring blades 42. The central shaft 43 is vertically disposed within the fermentation dish 1; the spiral stirring blades 42 are fixedly sleeved on the outside of the central shaft 43 and are disposed above the porous plate 2 and embedded in the solid material pile; the driving source 41 is capable of driving the central shaft 43 to rotate.

[0032] By driving the central shaft 43 to rotate through the driving source 41, the spiral stirring blades 42 can be driven to rotate in the solid pile, thereby driving the solid pile to flip upward, thereby stirring the solid pile in the fermentation dish 1. Combined with the air blown out by the air flow layer 11, the temperature inside the solid pile can be quickly reduced, and the oxygen content in various areas of the fermentation dish 1 can also be increased.

[0033] In another embodiment, referring to Figure 2 A protective cover 6 is also removably provided on the top of the fermentation dish 1. The protective cover 6 includes an upper plate 61 and a lower plate 62, which are spaced apart. A plurality of first air holes 611 are evenly distributed on the upper plate 61, and a plurality of second air holes 621 are evenly distributed on the lower plate 62. When viewed from above, the plurality of first air holes 611 and the plurality of second air holes 621 are staggered. This ensures ventilation of the protective cover 6 while reducing the possibility of foreign matter entering the fermentation dish 1.

[0034] Reference Figure 2Some of the first air holes 611 are connected to air suction pipes 7. Multiple first air holes 611 connected to air suction pipes 7 are evenly distributed on the upper plate 61. A main pipe 8 is provided at the end of the air suction pipe 7 away from the protective cover 6. Multiple air suction pipes 7 are connected to this main pipe 8. An air suction device 9 is provided at the end of the main pipe 8 away from the air suction pipe 7. The air suction device 9 draws air out of the fermentation dish 1, creating a lower pressure environment within the fermentation dish 1 than the external environment. This allows the clean air pumped into the air flow layer 11 to be more easily pressed into the solid material, thereby improving air circulation efficiency.

[0035] Furthermore, the air intake capacity of the air intake device 9 is less than the air flow capacity of the ventilation device 3, so that the air intake device 9 is only used to form an air circulation channel within the fermentation dish 1, promoting the air in the air flow layer 11 to enter the solid material pile, thereby improving the heat dissipation and oxygenation efficiency. Excess clean air can be discharged through the first air vent 611 without the air intake branch pipe 7.

[0036] In addition, refer to Figure 1 , a detection rod 10 is provided in the fermentation dish 1, and the detection rod 10 is located above the porous plate 2, and a plurality of temperature sensing heads 101 are spaced apart on the detection rod 10. In the embodiment of the present application, preferably three temperature sensing heads 101 are provided, and the three temperature sensing heads 101 are respectively arranged at a position close to the top of the solid pile, a position in the middle of the solid pile, and a position close to the bottom of the solid pile. The temperature at different depths of the solid material can be timely understood by the plurality of temperature sensing heads 101. At the same time, an oxygen analyzer is also connected to the detection rod 10, and the dissolved oxygen situation in the solid pile can be timely understood by the oxygen analyzer, thereby realizing real-time online monitoring of the fermentation process of the solid pile. When the microorganisms enter the peak period of reproduction and reach the upper limit of the growth temperature and the lower limit of the dissolved oxygen, the air in the fermentation dish 1 can be circulated by the ventilation device 3 and the air suction device 9, thereby achieving the purpose of cooling the solid pile as a whole and filling the entire fermentation dish 1 with oxygen.

[0037] In another embodiment, referring to Figure 2 The bottom of the fermentation dish 1 is also provided with a plurality of interconnected drainage grooves 13, and the bottom wall of the fermentation dish 1 is also provided with a slope inclined toward the drainage grooves 13, so that the water generated by the solid pile during the fermentation process can be gathered into the drainage grooves 13; the side wall of the fermentation dish 1 is provided with a drainage port 14 connected to the drainage grooves 13, and the drainage grooves 13 are provided with an inclined slope toward the drainage port 14, so that the water gathered in the drainage grooves 13 can be discharged through the drainage port 14.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A small solid-state fermentation reactor with controllable oxygen content, characterized in that: The fermentation vessel (1) comprises a porous plate (2) fixed near the bottom of the fermentation vessel (1), the porous plate (2) is used for stacking solid materials above, and an air flow layer (11) is formed below the porous plate (2); The side wall of the air flow layer (11) is connected to a ventilation device (3) for blowing air into the air flow layer (11); A stirring structure (4) is also provided in the fermentation dish (1), and the stirring structure (4) comprises a driving source (41) and a spiral stirring blade (42) provided above the porous plate (2), and the driving source (41) is used to drive the spiral stirring blade (42) to rotate.

2. A small solid-state fermentation reactor with controllable oxygen content according to claim 1, characterized in that: A vent (12) is provided on the side wall of the air flow layer (11), a filter layer (5) is provided at the vent (12), and an air outlet of the ventilation device (3) is communicated with the vent (12).

3. The small solid-state fermentation reactor with controllable oxygen content according to claim 1, characterized in that: A protective cover (6) is detachably provided at the upper opening of the fermentation dish (1), and the protective cover (6) comprises an upper plate (61) and a lower plate (62) spaced apart from each other. A plurality of first air holes (611) are provided on the upper plate (61), and a plurality of second air holes (621) are provided on the lower plate (62). The plurality of first air holes (611) and the plurality of second air holes (621) are staggered.

4. A small solid-state fermentation reactor with controllable oxygen content according to claim 3, characterized in that: An air suction branch pipe (7) is connected above some of the first air holes (611), a main pipe (8) is provided at one end of the air suction branch pipe (7) away from the protective cover (6), a plurality of the air suction branch pipes (7) are connected to the main pipe (8), and an air suction device (9) is provided at one end of the main pipe (8) away from the air suction branch pipe (7).

5. A small solid-state fermentation reactor with controllable oxygen content according to claim 4, characterized in that: The air suction volume of the air suction device (9) is smaller than the air ventilation volume of the ventilation device (3).

6. The small solid-state fermentation reactor with controllable oxygen content according to claim 3, characterized in that: A detection rod (10) is further provided in the fermentation dish (1), and a plurality of temperature sensing heads (101) are arranged at intervals on the detection rod (10). The temperature sensing heads (101) are arranged at different depths of the fermentation dish (1) and are used to detect the temperature at corresponding positions.

7. The small solid-state fermentation reactor with controllable oxygen content according to claim 1, characterized in that: A plurality of mutually communicating drainage grooves (13) are provided on the bottom wall of the fermentation dish (1), and a drainage port (14) communicating with the drainage grooves (13) is provided on the side wall of the fermentation dish (1).

8. The small solid-state fermentation reactor with controllable oxygen content according to claim 1, characterized in that: The diameter of the fermentation dish (1) gradually increases toward the air flow layer (11).

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