66results about "Solid phase fermentation bioreactors" patented technology

A treatment facility (1) for the treatment of fermentable solid products by fermentation has a reactor (2) supported by a frame and a cartridge (11) having an apertured region (110) for storing the product. The reactor (2) is provided with an inlet (3) for products to be treated, an outlet (4) for discharging the treated products, a biogas outlet (5), an opening (8) for inserting an inoculum, and an opening (9) for discharging the leachate. The facility also has a tubular body (6) and a liquid / solid separator (7). The body (6) is closed at both ends by a closing element (100) movable between an open position and a closed position. One of the ends (3) receives the products to be treated and the other of the ends (4) discharges the treated products, each cartridge (11) being slidably movable inside the body (6) and the liquid / solid separator (7) having a filter (12).

The invention relates to the field of biological catalysis, and discloses a method and a device for generating ursodesoxycholic acid through continuous flow catalysis of chenodeoxycholic acid. Comprising the following steps: (1) in the presence of first immobilized cells, carrying out a first catalytic reaction on a reaction system containing chenodeoxycholic acid to obtain a first product, the first immobilized cells expressing 7 alpha-hydroxysteroid dehydrogenase and lactic dehydrogenase; the concentration of the chenodeoxycholic acid in the reaction system is 40 to 70 mM; (2) adjusting the pH value of the first product to 8-9, and then in the presence of a second immobilized cell, carrying out a second catalytic reaction on the first product after the pH value is adjusted to obtain ursodesoxycholic acid, and the second immobilized cell expresses 7 beta-hydroxysteroid dehydrogenase and glucose dehydrogenase. According to the method, the stable activity of a catalytic system is kept, efficient conversion of high-concentration CDCA is achieved, meanwhile, precipitation of 7-KLCA is thoroughly avoided, and the synthesis efficiency, the product purity and the process continuity of UDCA are remarkably improved.

The invention belongs to the technical field of microalgae biological culture, discloses a method for promoting growth of nostoc by efficiently utilizing a nitrogen source through solid-liquid culture, and aims to solve the problems of low nitrogen source utilization rate and slow biomass accumulation in the conventional culture technology. The method is based on a closed photobioreactor with gas-liquid circulation, and comprises the following steps: preparing a nitrogen-free BG11 culture medium; coating nostoc on the surface of the sterilized porous hydrophilic sponge; placing the sponge in a reactor, and adding the culture medium until no accumulated water is infiltrated; after closing the reactor, controlling the temperature, lighting and other conditions, continuously / intermittently supplementing nitrogen and maintaining certain positive pressure, and circulating the culture medium to supplement nutrition; and taking the sponge after the culture is finished. The utilization rate of a nitrogen source is remarkably increased, the biomass obtained through culture is remarkably increased, culture conditions are stable, and the method is suitable for large-scale development of nostoc and development of high-added-value products.

A synovium on a chip device having: a cartridge housing, a central chamber embedded in the cartridge housing, at least one aperture fluidly connected to the central chamber, and a plurality of evenly spaced micropillars arranged in a substantially circular shape within the central chamber such that the central chamber is partitioned into at least a first inner region and a first outer region, wherein the first inner region includes endothelial cells configured to mimic a vascular network and the first outer region includes fibroblast-like synoviocytes (FLS) configured to mimic a synovium.

The invention relates to an enzyme-loaded porous gel capable of being quickly reconstructed, a preparation method and a flow microreactor, amphiphilic nanoparticles are used as a stabilizer, bubbles are introduced into a polymer solution and polymerization crosslinking is induced to form a uniform porous gel structure with an adjustable pore diameter, the amphiphilic nanoparticles can be adsorbed on a gas-liquid interface to stabilize the bubbles, and the porous gel structure can be quickly reconstructed. Enzyme molecules can be loaded on the surface to form a porous reaction medium with catalytic activity. The obtained porous gel has good mechanical strength, controllable aperture and porosity, and can realize rapid reconstruction of a porous structure, so that the application scene of a microreactor is widened, and the effective service cycle of enzyme is remarkably prolonged when the microreactor is blocked.

The utility model relates to the technical field of crop straw treatment, in particular to multi-strain mixing equipment based on solid-state fermentation of crop straws, which comprises a fermentation tank, and stirring driving components are arranged at the bottom end and inside the fermentation tank; a dispersing and mixing assembly is arranged on the upper portion of the transmission shaft and comprises dispersing blades fixedly installed on the outer wall of the upper end of the transmission shaft, and a plurality of dispersing holes are formed in the end faces of the dispersing blades. According to the utility model, crop straw particles and strains are sequentially added, so that the crop straw particles and the strains can be ensured to be in the fermentation tank, and the condition that the strains are exposed in the external environment in the period from inoculation to loading can be avoided, and if harmful microorganisms, infectious microbes and the like exist in the surrounding environment, the strains are not exposed in the external environment. The problem that the fermentation effect is affected due to the fact that the microbial strains are likely to be attached to inoculated straw raw materials and compete with inoculated beneficial microbial strains for nutrient substances and space in the prior art is solved.

The utility model relates to a kind of koji processing system, comprising: koji feeding mechanism, the koji disc that is loaded with koji is introduced into koji processing system;Koji collecting mechanism is connected with koji feeding mechanism, separates and collects the koji on koji disc introduced by koji feeding mechanism;Washing and air-drying mechanism is connected with koji collecting mechanism, can wash and air-dry koji disc after separating koji by koji collecting mechanism;Turnover mechanism is docked with washing and air-drying mechanism, can koji disc be turned over to preset position;Laying mechanism is docked with turnover mechanism, and can be laid on koji disc raw material for cultivating koji;Koji disc ejection mechanism is connected with laying mechanism, for guiding koji frame to koji processing system outside. Realize the automation processing of koji processing whole process, not only need not manual intervention, and the process of koji processing is optimized, to realize the fine processing of koji with less operation action, improve the efficiency of koji processing and reduce the cost of koji processing.

The utility model discloses biomass solid waste anaerobic reaction equipment, which comprises a tank-shaped anaerobic reactor, a stirring device, a positive and negative pressure protector and a working platform, and the stirring device, the positive and negative pressure protector and the working platform are matched, so that the anaerobic reactor can be fully utilized on the premise that the volume of the anaerobic reactor is increased. A good treatment effect on the biomass solid waste is kept; wherein the stirring device adopts a shaft rod rotationally arranged in the reaction cavity to drive a plurality of groups of stirring blades to stir and rotate in the reaction cavity, so that sand setting of slurry can be reduced on the premise of low-power stirring and rotating, slurry with a better homogenizing effect is obtained, and the pressure in the reaction cavity can be effectively adjusted in real time in cooperation with a positive and negative pressure protector; therefore, the anaerobic reactor cannot deform due to the influence of overpressure, and the large-volume anaerobic reactor is protected.

The present application relates to the technical field of microbial fermentation, and discloses a solid material fermentation combined unit and a solid fermentation material preparation method. The solid material fermentation combined unit comprises a fermentation combined tower, which is composed of three longitudinally combined fermentation bins with the same structure, is used for sequentially receiving materials from top to bottom and completes multi-stage fermentation, and comprises a uniform spraying vertical pipe arranged in a longitudinal array in a fermentation area and a pressure supply assembly connected with the uniform spraying vertical pipe. A plurality of flexible elastic pushing walls are arranged on the outer wall of the uniform spraying vertical pipe in an axial direction. A plurality of groups of telescopic columns are arranged in the uniform spraying vertical pipe corresponding to the position of each pushing wall. Each group of telescopic columns is composed of four telescopic units distributed in a cross shape, and the telescopic ends of the telescopic units are respectively connected to the inner walls of the pushing walls in four directions. The flexible elastic pushing walls are arranged on the outer wall of the uniform spraying vertical pipe, and the pushing walls are driven by the internal telescopic columns to be radially inflated at regular time, so that the fermentation materials can be periodically and flexibly disturbed.

The invention relates to the technical field of coffee fresh fruit fermentation, and particularly discloses a coffee fresh fruit vertical fermentation tank and method, the coffee fresh fruit vertical fermentation tank comprises a tank body, a cooling pipe is arranged in the tank body, two ends of the cooling pipe are connected with a refrigeration disc through a circulating pipe, and the refrigeration disc is connected with a compressor; the bottom of the tank body is connected with a fermentation liquid isolation barrel, a solid-liquid separator is arranged in the barrel, one end of the barrel is provided with a discharge port, the top of the tank body is provided with a feed port, the side surface is provided with a temperature sensor, a PH detection device and a vacuum interface, the top is provided with a pressure valve, the peripheral side is welded with a support frame, and a compressor is arranged on the support frame. The device can realize efficient access and solid-liquid separation of solid fresh coffee fruits, solves the problem of solid fermentation cooling through a special-shaped water circulation cooling structure, creates an anaerobic static fermentation environment, avoids excessive fermentation of the fresh fruits and skin damage, ensures stable flavor of coffee beans, and improves the quality of the coffee beans. The problem that the fresh coffee fruits cannot be stably produced in a large scale through anaerobic dry fermentation is effectively solved.

The utility model provides a cell directional attachment membrane material device which comprises an outer chamber, an inner chamber, an inner chamber, an outer chamber and an inner chamber, wherein the top of the outer chamber is provided with an outer chamber opening; the inner chamber is nested in the outer chamber, the diaphragm material is placed in the inner chamber, a fixing part is arranged at the bottom of the inner chamber, the diaphragm material is fixed in the inner chamber through the fixing part, an inner chamber opening is formed in the top of the inner chamber, and the inner chamber opening is formed in the outer chamber opening; and the upper cover covers the top of the outer chamber and is used for sealing the opening of the outer chamber. The fixing part is arranged at the bottom of the inner chamber, and the membrane material is fixed in the inner chamber through the fixing part, so that the risk that the membrane material floats or moves or the specific surface is changed due to the flowing environment of the cell culture fluid is reduced, and the experimental risk is reduced. The upper cover can seal the opening of the outer chamber, so that the cell directional attachment membrane material device is prevented from being polluted.

The utility model discloses a kind of temperature and humidity monitoring equipment for solid fermentation, it is related to fermentation monitoring equipment technical field, including shield, integrated monitoring module, ferromagnetic body, electromagnet, detection hole is opened in shield, and the detection hole is through shield, shield is provided with two, two shield can be detachably fixed and form sphere, integrated monitoring module is installed in the sphere inside formed by two shield, integrated monitoring module monitors the temperature and humidity of solid fermentation material outside shield by detection hole, flexible cable is fixed on integrated monitoring module, the utility model is set by shield, integrated monitoring module, ferromagnetic body, electromagnet, so that the temperature and humidity monitoring equipment for solid fermentation can be flexibly moved in fermentation tank, and moving range is spread all areas of fermentation tank, control is flexible, to be able to realize the purpose of monitoring humidity, temperature in any position in fermentation tank, use effect is better.

The invention discloses oxidation fermentation equipment for processing red rice substitutional tea and a processing method of the oxidation fermentation equipment, and relates to the field of oxidation fermentation of the red rice substitutional tea. The oxidation fermentation equipment for processing the red rice substitutional tea comprises a fermentation box body and a plurality of bearing devices which are sequentially arranged in the fermentation box body from top to bottom; the movable turning device is arranged on the inner wall of the fermentation box body. The fermentation equipment disclosed by the invention adopts a multi-layer bearing structure, and a plurality of bearing units are arranged in the fermentation box body from top to bottom, so that the vertical space is fully utilized, and the productivity is remarkably improved. The system has the core advantages that the functions of turning, ventilating, rolling and the like are integrated in a set of mobile system, the temperature is accurately controlled through the temperature control module subjected to metering verification, manual intervention is reduced through automatic control, and the stability of fermentation quality is effectively guaranteed.

The invention discloses a dry-like anaerobic fermentation method, and belongs to the field of organic waste resource energy circulation. The method comprises the following steps: crushing straw stacks, refluxing and spraying biogas slurry, treating in a hydrolysis acidification tank, treating in an anaerobic fermentation tank (adding iron oxide), and refluxing the biogas slurry. Lignocellulose of straw is destroyed through straw stack pretreatment, redox oscillation is generated through intermittent aeration of the anaerobic fermentation tank, active oxygen is generated, the straw fiber structure is further destroyed, and the anaerobic fermentation gas production efficiency of the organic solid waste is improved. Meanwhile, iron oxide is added into the anaerobic fermentation tank, ferric iron and ammonia nitrogen are subjected to an iron ammoxidation reaction, and ammonia nitrogen accumulation can be relieved.

The application discloses a continuous dry anaerobic fermentation reactor, which comprises a rotating drum fermentation tank, a spiral feeder for feeding materials into the rotating drum fermentation tank, a sealing device for ensuring an anaerobic fermentation environment, a supporting device for supporting the rotating drum fermentation tank, a steam jacket wrapped outside the rotating drum fermentation tank and used for heating the rotating drum fermentation tank, a driving device for driving the rotating drum fermentation tank to rotate, an automatic temperature control device for controlling the temperature in the rotating drum fermentation tank, and a discharging bin for discharging materials and discharging biogas. The application is suitable for high-solid-content dry mesophilic and thermophilic anaerobic fermentation, and heat and mass transfer are intensified in the mode of rotating drum and material lifting plate, so that the reliability of the equipment and the biogas production rate are improved; the special sealing structure ensures the anaerobic environment; the design of the inclined cylinder of the rotating drum fermentation tank ensures that the material transmission and the fermentation process are simultaneously performed; and the automatic discharging and temperature control devices improve the automatic production level of the bio-natural gas.

The invention discloses a straw dry fermentation biogas digester, and relates to the technical field of biogas engineering, the outer side of the bottom of a biogas slurry storage layer is provided with a first sealing groove and a second sealing groove, two sealing defense lines are formed in cooperation with a second supporting frame and a first supporting frame, and sealing doors and impermeable coatings of all areas of a main body frame are matched; the biogas collecting rate can be increased to 95% or above, the operation requirements under different weather conditions can be met, biogas leakage and potential safety hazards caused by sealing failure are avoided, and the sealing reliability is high. The dry fermentation process is adopted, the raw materials do not need to be crushed into liquid, crushed straw particles can be adopted, the raw material pretreatment process is simplified, and the pretreatment cost is reduced. Meanwhile, a traditional hard tank body is replaced with the structure of a steel structure frame and a flexible sealing piece, and the material and machining cost of the adopted steel structure frame and the cost of a flexible sealing film are far lower than those of the tank body; meanwhile, the frame structure is short in construction period and convenient to install, and labor and equipment rental cost can be reduced.

A bidirectional flow hydrogenophilic carbon dioxide methanation apparatus and method comprises two stages: cultivation and normal operation. Both stages include a dry biomethanation mode and a wet immersion mode on a biofilm carrier. In the dry biomethanation mode of the cultivation stage, cultivation is initially performed using an upward flow inlet, then switched to a downward flow inlet. During normal operation, a mixture of hydrogen and carbon dioxide is alternately introduced into the gas-phase reaction zone from both ends of the apparatus, flowing upwards and downwards. The biofilm, in a static, drained state, converts the hydrogen and carbon dioxide into methane and water. In the wet immersion mode on the biofilm carrier, the porous biofilm carrier is immersed in a nutrient solution, allowing the microorganisms attached to its pores and surface to obtain nutrients, promoting microbial growth and reproduction. This invention can improve biomass and carbon dioxide conversion efficiency under low-cost conditions, providing an effective pathway for carbon dioxide resource utilization.

The present invention relates to an apparatus (1) for use in cellulose hydrolysis. The apparatus (1) comprises a channel (10) for guiding a stream of cellulose-containing waste in a flow direction (FD); one or more cylinder(s) (20) arranged to rotate around an axis (A), such that, when rotated, one or more side surfaces (21) of said cylinder(s) (20) exhibit a linear velocity vector orthogonal to said axis (A); and one or more complementary surfaces that face said side surfaces (21), such that, when the cylinder(s) (20) are rotated, the side surfaces (21) and complementary surfaces cooperate in grinding the waste. The present invention further proposes a respective method for cellulose hydrolysis.

This invention discloses an apparatus and method for screening polyphosphate-accumulating bacteria through alternating anaerobic / aerobic culture. The apparatus includes a top cover module and a deep-well plate that can be sealed and disassembled. Solid phosphorus-containing culture medium is added to the wells of the deep-well plate. The top cover module has cover holes corresponding to the wells of the deep-well plate, and solid supplementary culture medium is added to these cover holes to provide additional nutrients for polyphosphate growth under anaerobic conditions. The solid supplementary culture medium in the cover holes can be removed and replaced. When the top cover module and the deep-well plate are sealed together, the solid supplementary culture medium and the solid phosphorus-containing culture medium come into contact to form a closed anaerobic environment. The method is a preliminary screening method based on high-throughput deep-well plate culture – alternating anaerobic / aerobic modular culture – BCIP colorimetric observation, which avoids the need for repeated inoculation of large numbers of strains under anaerobic / aerobic conditions, effectively reducing experimental intensity.

The invention provides a system for solid phase fermentation, comprising: - a fermentation device configured to supply a substrate and substrate-treating microorganisms and / or enzymes therein and also to discharge a resulting product and waste substances; and - one or more hydraulic systems configured to provide, in the fermentation device, a liquid or a mixture of liquids which or at least one of which is saturated with bubbles of aerating gas of micro-, and / or nano-, and / or smaller size and / or dissolved oxygen; - an aeration device configured to provide saturation of the liquid with bubbles of aerating gas of micro-, and / or nano-, and / or smaller size, and / or dissolved oxygen; - a filtration device configured to separate the solid phase from a circulating liquid. A method for solid-phase aerobic fermentation and a method for producing a biotechnological product using said system are also provided. The invention provides uniform aeration of the substrate, regulation of its temperature and humidity, promotes acceleration of enzymatic processes, prevents bonding and drying of the substrate, reduces the size of the fermentation device and production areas, increases the number of possible products, and improves performance of the fermentation device and the entire system as a whole.

The invention discloses a fermentation tank for biologically fermenting feed, and relates to the technical field of feed production, the fermentation tank comprises a box body, the bottom surface of the box body is fixedly mounted on a bottom plate, a control panel is fixedly mounted on the surface of the box body, and a box door is rotatably connected to the top surface of the box body; a handle is fixedly connected to the bottom of the side face of the box door, a pair of fermentation tank bodies is detachably installed in the box body, and a biosensor is fixedly installed on the inner wall of the box body. The device is reasonable in structure, the interior of the box body is conveniently sealed through the adjusting assembly, external air is prevented from entering the box body to affect the feed fermentation effect, and then feed in the fermentation tank body is conveniently shaken through the swinging assembly and the reciprocating assembly, so that the feed is fully fermented.

The invention discloses a production process of abalone fermented feed, which is based on a fermentation system structure comprising a feed conveying unit, a material stirring unit, an inoculation mixing unit, a movable fermentation cabin and a temperature control fermentation room. The problems that traditional equipment is uneven in mixing, high in infectious microbe pollution risk and low in efficiency are solved through the steps of raw material feeding and pretreatment, sterilization and primary mixing, microbial inoculum inoculation and homogeneous mixing, transfer and controllable environment fermentation, fermentation post-treatment, finished product processing and the like. According to the invention, the risk of infectious microbe pollution is reduced by adopting front steam sterilization and full-closed design; the uniform distribution of the fungicide is realized through high-speed stirring and atomized spraying; by utilizing the movable fermentation cabin and the temperature-controlled fermentation room, the production flexibility and the automation degree are improved, the fermentation period is shortened, and the cost is optimized.

The present disclosure relates to the technical field of biological treatment of exhaust gases, in particular to preparation of a complex microbial inoculant, an apparatus for preparing the complex microbial inoculant and application thereof. The preparation of the complex microbial inoculant is to select kitchen wastes, wood chips and EM fungus chaff as aerobic composting raw materials, and add contaminant degrading bacteria Pseudomonas mendocin NX-1, Stenotrophomonas sp. HY-2, Rhodococcus sp. YZ-1, Ralstonia sp. XZW-1, and Pseudomonas oleovorans DT4 during the aerobic composting process for joint culture until a compost pile becomes thoroughly decomposed. The complex microbial inoculant provided by the present disclosure can simultaneously degrade n-hexane, pentane, chlorobenzene and tetrahydrofuran, and has the remarkable advantages of simple preparation process, low cost, low carbon, environmental friendliness and the like. The formed microbial inoculant that is rich in efficient degrading bacteria does not need to adjust pH, has the advantages of short starting cycle, and stable and efficient exhaust gas purification, has stronger environmental adaptability, and lays a foundation for engineering application of purifying waste water and exhaust gases containing n-hexane, pentane, chlorobenzene and tetrahydrofuran by a biological method.

The invention belongs to the field of oxidation fermentation, and particularly relates to a synchronous oxidation fermentation device and method for roots, flesh, peels and kernel meal of trichosanthes kirilowii Maxim. The synchronous oxidation fermentation device comprises a fermentation tank, the fermentation tank is installed on a six-degree-of-freedom motion platform, an inertia swing rod is installed in the fermentation tank, and multiple layers of pull rope sets are installed between the inertia swing rod and the inner wall of the fermentation tank. The pull rope set comprises a pull rope and a balance weight ball fixedly installed on the pull rope. An existing fermentation tank is improved, stirring mechanisms such as a stirring paddle are omitted, the six-degree-of-freedom motion platform for driving the fermentation tank to shake is installed below the fermentation tank, the inertia swing rod is installed in the fermentation tank, and by means of cooperation of the six-degree-of-freedom motion platform and the inertia swing rod, the fermentation tank is driven to shake; different degrees of impact are applied to the fermentation raw materials in the fermentation tank, so that the phenomenon of uneven fermentation is improved.

The invention relates to the technical field of straw fermentation, in particular to a fermentation treatment device for treating highland barley straw and a using method thereof.The fermentation treatment device comprises a compaction tank, a temperature control cavity is formed in the center in the compaction tank, and a discharging valve is fixedly connected to the bottom of the compaction tank; a driving motor is connected to the side wall of the compaction tank through bolts, an output shaft of the driving motor is fixedly connected with the circle center of a driving gear, the driving gear is meshed with a connecting gear ring, and the connecting gear ring is fixedly connected with the peripheral wall of the top cover. When a top cover rotates, a meshing gear is meshed with an intermittent inner gear ring, a lead screw is intermittently driven to rotate, so that a driving shaft is lifted, the whole contact assembly is finally lifted through a first connecting rod set and a second connecting rod set, then air is pumped into the upper portion of an inner frame through a control assembly, and the inner frame is pushed to beat and compact materials downwards; the materials are compacted layer by layer while being conveyed to a fermentation area in the compaction tank, and the density is high and uniform.

To provide a microbial culture device that allows easy cultivation of microorganisms.SOLUTION: A microbial culture device includes a three-layer laminated structure having a layered culture section for cultivating microorganisms, and at least one of a layered nutrient supply section for supplying nutrients to the culture section and a layered environmental component supply section for supplying environmental components to the culture section, which are arranged on a first surface of the culture section and a second surface opposite the first surface.SELECTED DRAWING: Figure 6

The utility model relates to small portable automatic constant-temperature solid-state fermentation equipment which comprises a constant-temperature frame, four lifting blocks are connected in the constant-temperature frame in a sliding manner, springs are connected between the lifting blocks and the constant-temperature frame, four mounting frames are connected in the constant-temperature frame in a sliding manner, and constant-temperature tanks are rotationally connected to the mounting frames. The front sides of the two constant-temperature tanks on the front side are both connected with transverse mounting assemblies in a clamped mode, the rear sides of the two constant-temperature tanks on the rear side are also both connected with transverse mounting assemblies in a clamped mode, the upper sides of the constant-temperature tanks are both connected with vertical mounting frames in a clamped mode, the upper portions of the transverse mounting assemblies are both connected with fixing frames, the fixing frames are both provided with driving motors, and the transverse mounting assemblies are both rotationally connected with two connecting rods. A belt pulley assembly is arranged between every two adjacent connecting rods, and driving wheels are connected to the inner sides of the connecting rods. Through the transverse installation assembly and the vertical installation frame, free switching between a vertical placement mode and a horizontal placement mode is achieved, and physical property requirements of different materials can be flexibly met.

The invention relates to the technical field of yeast fermentation, and particularly discloses microbial enhanced culture high-temperature yeast fermentation equipment, which comprises a fermentation chamber, a yeast tray unit, a material shifting unit and a yeast turning unit, in the feeding stage, the mounting ring is lifted upwards to enable the flexible yeast carrying bag to form a downwards-concave container, and after yeast blanks are fed through the feeding opening, the stirring pieces rotate in the circumferential direction to achieve rapid and uniform spreading; then, the mounting ring descends to enable the flexible yeast carrying bag to recover the horizontal state, and the yeast blanks are automatically and uniformly distributed to the periphery; a koji turning stage: a koji turning unit pushes out the koji blank in the central area of the flexible koji carrying bag towards the outer side in the radial direction when the mounting ring is lifted; meanwhile, a driving motor of the material stirring unit drives a rotating shaft to rotate and drives a stirring sheet to uniformly spread in the circumferential direction, so that complete mixing of the yeast blanks in the fermentation process is ensured and non-uniform local temperature or humidity is avoided through radial and circumferential composite stirring, and thus the overall consistency of yeast fermentation is improved.