GABA-rich unhulled rice and unhulled rice GABA enrichment device and enrichment method based on fed-batch water heat-moisture treatment

Abstract

The invention provides GABA-rich rice and a rice GABA enrichment device and enrichment method based on fed-batch water heat-moisture treatment. The device comprises a horizontal germination tank, a fed-batch water heat-moisture treatment device, an in-tank humidity sensor, an in-tank temperature sensor and a control unit, gABA enrichment is carried out on the rice through the fed-batch water heat-moisture treatment device, in the enrichment process, the sprouting tank body continuously rotates and drives the rice inside to move, the rice uniformly receives temperature, humidity and oxygen, the enriched rice is dried through a low-temperature drying technology, the GABA enrichment device integrates wheat wetting, enrichment and drying functions, and the GABA enrichment device has the advantages that the wheat wetting, enrichment and drying functions are integrated; the content of GABA in brown rice enriched by the device is greatly increased, meanwhile, the content of GABA in endosperm is also greatly increased, the fissure rate of the enriched rice is low, the processing quality of the rice is greatly improved, and the eating quality of cooked rice prepared from the rice is improved.

Description

Technical Field

[0001] The invention relates to the technical field of rice functional component enrichment devices, and in particular to rice rich in GABA and a rice GABA enrichment device and an enrichment method based on fluidized water and wet heat treatment. Background Art

[0002] γ-aminobutyric acid (GABA) is a non-protein amino acid that is widely found in animals and plants. It plays a role in the central nervous system of mammals as an inhibitory neurotransmitter. GABA participates in the physiological activities of brain circulation and has multiple physiological functions such as calming nerves, regulating hormone secretion, activating liver and kidney, treating asthma and preventing cardiovascular diseases. It has been approved as a new resource food by the Ministry of Health in 2009. Although GABA has important physiological functions, the amount of GABA produced in the human body decreases with age and increased stress. Therefore, supplementing GABA from food is of great significance to human health. The main methods for producing GABA include chemical synthesis, microbial fermentation and plant enrichment. The chemical synthesis method uses chemical substances to directly react to synthesize GABA, the microbial fermentation method uses some microorganisms containing glutamate decarboxylase in the body to produce GABA, and the plant metabolism method uses the stress response of plants under adverse stress conditions to produce GABA. Since both the chemical synthesis method and the microbial fermentation method have certain safety risks, and some of the products obtained are difficult to use in food, plant metabolism GABA has received great attention from food researchers at home and abroad.

[0003] As one of the most important cereals, rice is a major component of the diet of billions of people around the world. my country is a major rice consumer, with the largest output in the world, but the GABA content in brown rice is low and cannot meet the physiological needs of the human body. In order to increase the GABA content in brown rice, most Chinese companies still use the most traditional plant enrichment method - soaking germination method, which is simple to operate, green and safe. Adversity stress is an effective way to improve the GABA enrichment effect. Hypoxia stress CN111838668A A method for germinating highland barley that inhibits β-glucan degradation and enriches GABA, infrared irradiation CN202111442978.X Rice GABA germinated embryo rice and its production process, magnetic field stress CN202310146667.1 A method for increasing the γ-aminobutyric acid content of germinated brown rice by combining multiple factors, low temperature stress CN202310515478.7 A method for preparing germinated brown rice rich in GABA and GSH under low temperature stress, ultrasonic stress CN202210964983.5 A method for preparing germinated glutinous rice with high γ-aminobutyric acid content, and other stress methods are often used in combination with the soaking germination method. However, the soaking germination method requires at least 24 hours to enrich GABA. Long soaking will lead to the loss of soluble nutrients and the proliferation of microorganisms, resulting in a high rate of brown rice cracking, reduced nutritional quality, and poor hygienic quality. In addition, patent CN205597054U discloses a device and method for enriching γ-aminobutyric acid in plant fruits. Although the amount of water added in the invention is lower than that in the soaking germination method, it can reduce the cracking rate and improve the taste to a certain extent, but the device of the invention is relatively complicated, and it may make it impossible to mix the rice and water evenly, thereby affecting the enrichment effect of GABA. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a rice GABA enrichment device and enrichment method based on flow-added water and heat treatment. The rice is enriched with GABA by the flow-added water and heat treatment device. During the enrichment process, the germination tank body rotates continuously and drives the rice inside to move, so that the rice is evenly exposed to temperature, humidity and oxygen, and the enriched rice is dried by low-temperature drying technology. The GABA enrichment device integrates the functions of moistening, enriching and drying. The GABA content in the brown rice enriched by the device is greatly increased, and the GABA content in the endosperm is also greatly increased. The enriched rice has a low cracking rate, which greatly improves its processing quality and improves the edible quality of the cooked rice prepared by the rice.

[0005] The present invention also provides rice rich in GABA. The rice rich in GABA is enriched in GABA by using the rice GABA enrichment device and enrichment method based on fluid addition water moist heat treatment. The cooked rice prepared by using the rice has high edible quality.

[0006] The present invention achieves the above technical objectives through the following technical means.

[0007] A rice GABA enrichment device based on flow-added water and heat treatment, comprising a horizontal germination tank, a flow-added water and heat treatment device, a humidity sensor in the tank, a temperature sensor in the tank and a control unit;

[0008] The flow-water-addition heat treatment device is connected to a horizontal germination tank; the flow-water-addition heat treatment device comprises a steam generating device, a spray humidifying device, an air supply heating device and a drying exhaust device; the steam generating device and the spray humidifying device are connected to the air inlet pipe of the horizontal germination tank to provide moisture and humidity to the horizontal germination tank, the air supply heating device and the drying exhaust device are connected to the exhaust pipe of the horizontal germination tank, the air supply heating device is used to provide hot air to the horizontal germination tank, and the drying exhaust device is used to dry and exhaust the horizontal germination tank;

[0009] The germination tank is provided with an internal humidity sensor and an internal temperature sensor; the internal humidity sensor is used to detect the humidity in the germination tank; the internal temperature sensor is used to detect the temperature in the germination tank;

[0010] During the enrichment process, the germination tank body keeps rotating and drives the rice inside to move. The humidity sensor inside the tank detects the humidity inside the germination tank body in real time. The temperature sensor inside the tank detects the temperature inside the germination tank body in real time and transmits the detected data to the control unit. The control unit compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to supply steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust. When the temperature is lower than the preset temperature, the air supply heating device is controlled to start. After the enrichment is completed and during the drying process, the drying exhaust device is controlled to discharge water vapor to reduce the humidity in the tank and achieve the purpose of drying.

[0011] In the above scheme, the horizontal germination tank comprises a germination tank body, an intermediate shaft and a rotating mechanism;

[0012] The germination tank body is provided with a humidity detection port, an observation port and a feeding port, one end of the intermediate shaft penetrates into the germination tank body, and the other end is located outside the germination tank body and connected to the first bearing;

[0013] The exhaust pipe and the air intake pipe are installed on the middle shaft of the germination tank body. A section of the exhaust pipe located inside the germination tank body is provided with a plurality of exhaust ports, and a section of the air intake pipe located inside the germination tank body is provided with a plurality of air intake ports.

[0014] The germination tank body is connected to a rotating mechanism, and the rotating mechanism drives the germination tank body to rotate.

[0015] In the above scheme, a seal is provided at the connection between the intermediate shaft and the germination tank body.

[0016] In the above scheme, the rotating mechanism includes a motor, a driving shaft, a driven shaft, a second bearing, a coupling, a roller and a transmission mechanism;

[0017] The output shaft of the motor is connected to the driving shaft, the driving shaft is connected to the driven shaft through a coupling, and the driving shaft and the driven shaft are respectively supported by second bearings; the roller includes two driving wheels and two driven wheels; the driving wheel is installed on the driving shaft, and the driven wheel is installed on the driven shaft, and the driving wheel and the driven wheel are respectively connected to the germination tank body through a transmission mechanism to drive the germination tank body to rotate.

[0018] In the above scheme, the discharging auxiliary mechanism includes a push rod motor, a third bearing, and a fastening connector;

[0019] One end of the push rod motor is connected to one side of the germination tank body, and the fastening connector is arranged on the other side of the germination tank body, and the fastening connector is connected to the third bearing.

[0020] In the above scheme, the steam generating device includes a steam generator, a steam pressure reducing valve and a steam automatic valve;

[0021] The spray humidification device includes a water supply mechanism, a wet heat mixer, a temperature sensor, a flow meter, and a solenoid valve;

[0022] The steam generator is connected to the air inlet of the wet heat mixer through a pipeline, the water supply mechanism is connected to the water inlet of the wet heat mixer through a pipeline, water vapor and cold water are mixed in the wet heat mixer, a steam pressure reducing valve and a steam automatic valve are arranged on the pipeline connecting the steam generator and the wet heat mixer; a flow meter and a solenoid valve are arranged on the pipeline connecting the water supply mechanism and the wet heat mixer; the air inlet of the wet heat mixer is connected to the first air outlet of the induced draft fan through a pipeline, and the air outlet of the wet heat mixer is connected to the air inlet pipe through a pipeline; the pipeline connecting the wet heat mixer and the air inlet pipe A temperature sensor is provided on the germination tank to detect the temperature at the outlet of the wet heat mixer; when the water vapor and cold water are mixed in the wet heat mixer to a preset enrichment temperature, the control unit controls the induced draft fan to transport the mixed gas-liquid mixture into the germination tank body, and sprays the mixture into the germination tank body in the form of atomized water through an atomizing nozzle installed on multiple exhaust ports in the germination tank body through an exhaust pipe, so that the rice in the germination tank body receives moisture evenly and a certain humidity is maintained in the germination tank body during the enrichment process, which is beneficial to the enrichment of GABA and its migration into the grains.

[0023] In the above scheme, the air supply heating device includes a heater, a fresh air control valve and an induced draft fan; the second air outlet of the induced draft fan is connected to the germination tank body through a pipeline, and a heater and a fresh air control valve are provided on the pipeline connecting the second air outlet of the induced draft fan and the germination tank body; the heater is used to heat the air in the pipeline, and during the enrichment process, hot air is introduced into the germination tank body to increase the temperature inside the germination tank, activate glutamate decarboxylase, and generate GABA; and during the drying process, after the steam generator stops working, hot air is introduced into the germination tank body to make the temperature inside the germination tank reach a certain level, thereby reducing the moisture content of the rice.

[0024] Furthermore, the drying exhaust device includes a drying exhaust valve and an exhaust pipe and an exhaust port disposed on the middle shaft in the germination tank body.

[0025] The second air outlet of the induced draft fan is connected to the exhaust pipe of the germination tank body through a pipeline, and an isolation control valve is arranged between the fresh air control valve and the exhaust valve; when exhaust is required, the control unit closes the isolation control valve and opens the exhaust valve to allow the gas discharged from the exhaust pipe to be discharged through the exhaust valve; when air needs to be supplied to the germination tank body for heating, the isolation control valve is opened and the exhaust valve is closed to allow hot air to enter the germination tank body through the exhaust pipe; the fresh air control valve is used to control the flow rate of hot air entering.

[0026] A method for enriching GABA in rice, using the rice GABA enrichment device based on flowing water and heat treatment to enrich GABA in rice, comprising the following steps:

[0027] In the process of enriching the rice GABA, the horizontal germination tank humidifies the rice by a steam generating device and a spray humidifying device of the flow water addition and wet heat treatment device, and heats the rice by a wind supply heating device, so that the water content and temperature required for enrichment are reached in the germination tank body, and the germination tank body is rotated while atomizing and heating, and the rotation of the germination tank body drives the rice inside to move, so that the rice is evenly exposed to temperature, humidity and oxygen, and the rice is enriched with GABA in a hot and humid environment, and GABA is continuously generated and migrates to the inside of the grain along with the water, and the rice is dried after the enrichment is completed;

[0028] The humidity sensor in the tank detects the humidity in the germination tank in real time, and the temperature sensor in the tank detects the temperature in the germination tank in real time, and transmits the detected humidity and temperature data to the control unit, and the control unit compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to start supplying steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust and reduce the humidity; when the temperature is lower than the preset temperature, the air supply heating device is controlled to start, and hot air is sent into the germination tank.

[0029] After the enrichment is completed and during the drying process, the drying exhaust device is controlled to discharge water vapor.

[0030] In the above scheme, the flow water heat treatment is to humidify the rice in the germination tank by atomizing humidification at a humidification rate of 0.5% / h to 2.5% / h until the moisture content of the rice reaches 18% to 24%; the purpose of humidifying the rice is to activate glutamate decarboxylase after the moisture content of the rice is increased, catalyze the decarboxylation reaction of glutamate, and generate GABA;

[0031] The heating is to keep the relative humidity of the air in the germination tank at 75% to 95% and the temperature at 55 to 75° C. by means of an air supply heating device; the purpose of heating the rice is to increase the activity of glutamate decarboxylase, catalyze the decarboxylation reaction of glutamate, and generate GABA;

[0032] The enrichment process is to keep the temperature of the germination tank at 55-75°C by means of an air supply heating device, while keeping the moisture content of the rice at 18%-24%, and keep it for 4-6 hours under the condition that the germination tank is continuously rotated;

[0033] The GABA migration utilizes the water solubility and concentration gradient of GABA to make it migrate to the inside of the grain while it is continuously generated, gradually diffusing the GABA with a higher concentration in the germ part of the rice grain to the endosperm part, thereby increasing the GABA content in the white rice prepared from the rice grain;

[0034] The drying is to keep the air temperature in the germination tank at 35-50°C by means of an air supply heating device to dry the rice, and to reduce the humidity in the germination tank to 10-30% by means of an induced draft fan, while continuously rotating the germination tank until the moisture in the rice reaches 12%-14.5%. Low-temperature drying can ensure that the nutrients in the brown rice are not lost, and the water diffuses slowly from the inside to the outside, so that the rice has better processability and nutritional quality.

[0035] A rice grain rich in GABA is obtained by enriching the GABA in the rice grain using the device for enriching the rice grain GABA based on the flow-added water-heat treatment and according to the method for enriching the GABA in the rice grain.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] (1) The GABA enrichment device of the present invention integrates the functions of wheat moistening, enrichment and drying, which can save investment and floor space. In addition, during the enrichment process of rice GABA, the horizontal germination tank rotates continuously to allow the rice to evenly receive oxygen, moisture and heat, which is beneficial to the synthesis of GABA.

[0038] (2) The GABA content in the enriched brown rice of the present invention is greatly increased, and the flow water addition and humidification technology can promote the continuous migration of GABA from the germ to the internal endosperm, greatly increasing the GABA content in the endosperm. Even if the refined white rice prepared from the rice is consumed, sufficient GABA can be taken in daily, so that the taste and nutritional value are guaranteed at the same time;

[0039] (3) Compared with the soaking method, the present invention adopts the flow water addition heat treatment and low temperature drying technology. The water absorption rate of the rice during the enrichment process and the diffusion rate of water from the inside to the outside during the drying process are both slow. The cracking rate of the enriched rice is low, which greatly improves its processing quality.

[0040] (4) Compared with the soaking method, the hardness of the brown rice and white rice prepared from the enriched rice grains of the present invention is lower, the stickiness is increased, and the edible quality of the cooked rice is greatly improved;

[0041] (5) Compared with the soaking method, the present invention adds less water during the enrichment process and the enrichment time is shorter, which can reduce the reproduction of microorganisms, reduce the generation of odor, and improve its sanitary quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a schematic diagram of the structure of the rice GABA enrichment device;

[0043] Figure 2 This is the structural schematic diagram of the germination tank in the rice GABA enrichment device.

[0044] In the figure: 1. horizontal germination tank; 2. drying exhaust valve; 3. isolation control valve; 4. fresh air control valve; 5. heater; 6. induced draft fan; 7. wet heat mixer; 8. humidity sensor; 9. flow meter; 10. solenoid valve; 11. steam automatic valve; 12. steam pressure reducing valve; 13. steam trap; 14. humidity sensor in the tank; 15. temperature sensor in the tank; 101. humidity detection port; 102. observation port; 103. feeding port; 104. germination tank body; 105. intermediate shaft; 106. exhaust port; 107. air inlet; 108. seal; 109. first bearing; 110. exhaust pipe; 111. air inlet pipe; 112, motor; 113. second bearing; 114. push rod motor; 115. coupling; 16. roller; 17. third bearing; 18. fastening connector. DETAILED DESCRIPTION

[0045] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "front", "back", "left", "right", "up", "down", "axial", "radial", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Figure 1 The figure shows a preferred embodiment of the rice GABA enrichment device based on the flow-added water and heat treatment of the present invention, which integrates the functions of moistening wheat, germination and drying, and comprises a horizontal germination tank 1, a flow-added water and heat treatment device, a humidity sensor 14 in the tank, a temperature sensor 15 in the tank and a control unit;

[0049] The flow-water-adding heat treatment device is connected to the horizontal germination tank 1; the flow-water-adding heat treatment device includes a steam generating device, a spray humidifying device, an air supply heating device and a drying exhaust device; the steam generating device and the spray humidifying device are connected to the air inlet pipe 110 of the horizontal germination tank 1 to provide moisture and humidity to the horizontal germination tank 1, the air supply heating device and the drying exhaust device are connected to the exhaust pipe 110 of the horizontal germination tank 1, the air supply heating device is used to provide hot air to the horizontal germination tank 1, and the drying exhaust device is used to dry and exhaust the horizontal germination tank 1;

[0050] The germination tank body 104 is provided with an internal humidity sensor 14 and an internal temperature sensor 15; the internal humidity sensor 14 is used to detect the humidity in the germination tank body 104; the internal temperature sensor 15 is used to detect the temperature in the germination tank body 104;

[0051] During the enrichment process, the germination tank body 104 rotates continuously and drives the rice inside to move. The humidity sensor 14 in the tank detects the humidity in the germination tank body 104 in real time. The temperature sensor 15 in the tank detects the temperature in the germination tank body 104 in real time and transmits the detected data to the control unit. The control unit compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to start supplying steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust. When the temperature is lower than the preset temperature, the air supply heating device is controlled to start. After the enrichment is completed and during the drying process, the drying exhaust device is controlled to discharge water vapor to reduce the humidity in the tank and achieve the purpose of drying.

[0052] like Figure 2 As shown, the horizontal germination tank 1 comprises a germination tank body 104, an intermediate shaft 105, a rotating mechanism and a discharging auxiliary mechanism;

[0053] The germination tank body 104 is provided with a humidity detection port 101, an observation port 102 and a feeding port 103. The humidity detection port 101 is used to conveniently take out rice from the germination tank body 104 to detect its moisture content, the observation port 102 is used to observe the situation in the germination tank body 104, and the feeding port 103 is used to add materials.

[0054] One end of the intermediate shaft 105 penetrates into the germination tank body 104, and the other end is located outside the germination tank body 104 and connected to the first bearing 109, and a seal 108 is provided at the connection between the intermediate shaft 105 and the germination tank body 104;

[0055] The exhaust pipe 110 and the air intake pipe 111 are installed on the intermediate shaft 105 of the germination tank body 104. The exhaust pipe 110 is provided with a plurality of exhaust ports 106 on a section located inside the germination tank body 104. The air intake pipe 111 is provided with a plurality of air intake ports 107 on a section located inside the germination tank body 104.

[0056] The germination tank body 104 is connected to the rotating mechanism, and the rotating mechanism drives the germination tank body 104 to rotate. The germination tank body 104 rotates continuously and drives the rice to move in a reciprocating cycle. During the moistening process, the rice is evenly mixed with water; during the enrichment process, the rice is evenly exposed to temperature, humidity and oxygen, thereby enriching GABA in a hot and humid environment; during the drying process, the rice is evenly heated, which is conducive to the migration of water from the inside of the grain to the outside.

[0057] The rotating mechanism includes a motor 112, a driving shaft, a driven shaft, a second bearing 113, a coupling 115, a roller 16 and a transmission mechanism;

[0058] The output shaft of the motor 112 is connected to the driving shaft, and the driving shaft is connected to the driven shaft through a coupling 115. The driving shaft and the driven shaft are supported by the second bearing 113 respectively; the roller 16 includes two driving wheels and two driven wheels; the driving wheel is installed on the driving shaft, and the driven wheel is installed on the driven shaft. The driving wheel and the driven wheel are respectively connected to the germination tank body 104 through a transmission mechanism to drive the germination tank body 104 to rotate. The transmission mechanism is a friction pair or a gear. The main function of the coupling 115 is to connect the driving shaft and the driven shaft and transmit motion and torque to ensure the stability and efficiency of power transmission; the coupling 115 also has the function of reducing vibration and noise during machine operation, improving the stability and reliability of the machine, thereby protecting the connected parts from excessive loads.

[0059] The discharging auxiliary mechanism includes a push rod motor 114, a third bearing 17, and a fastening connector 18; one end of the push rod motor 114 is connected to one side of the germination tank body 104, the fastening connector 18 is arranged on the other side of the germination tank body 104 The discharging port side, the fastening connector 18 is connected to the third bearing 17; specifically, in a specific embodiment of the present invention, when the germination tank body 104 is in operation, the fastening connector 18 and the germination tank body 104 are loosened, and the germination tank body 104 rotates normally. When discharging, the fastening connector 18 is connected to the germination tank body 104, and the fastening connector 18 is connected to the third bearing 17 as a whole, the power of the push rod motor 114 is turned on, the push rod of the push rod motor 114 rises, and the left side of the germination tank body 104 is fixed by the fastening connector 18, and rotates with the third bearing 17, pushing the right side of the germination tank body 104 to rise, and the germination tank body 104 is lower on the left and higher on the right, so that the material is discharged.

[0060] The steam generating device comprises a steam generator, a steam pressure reducing valve 12 and a steam automatic valve 11; the spray humidifying device comprises a water supply mechanism, a wet heat mixer 7, a temperature sensor 8, a flow meter 9 and a solenoid valve 10; the steam generator is connected to the air inlet of the wet heat mixer 7 through a pipeline, the water supply mechanism is connected to the water inlet of the wet heat mixer 7 through a pipeline, water vapor and cold water are mixed in the wet heat mixer 7, a steam pressure reducing valve 12 and a steam automatic valve 11 are arranged on the pipeline connecting the steam generator and the wet heat mixer 7; a flow meter 9 and a solenoid valve 10 are arranged on the pipeline connecting the water supply mechanism and the wet heat mixer 7; the air inlet of the wet heat mixer 7 is connected to the first air outlet of the induced draft fan 6 through a pipeline, and the outlet of the wet heat mixer 7 is connected to the air inlet pipe 111 through a pipeline; a temperature sensor 8 is arranged on the pipeline connecting the wet heat mixer 7 and the air inlet pipe 111, which is used to detect the temperature of the outlet of the wet heat mixer 7.

[0061] The steam generator and the spray humidification device mainly function to provide water and humidity to the horizontal germination tank 1. The water vapor is mixed with cold water in the wet heat mixer 7 to the required enrichment temperature, and then transported to the germination tank body 104 through the induced draft fan 6, and sprayed into the germination tank body 104 in the form of atomization and water addition through the atomization nozzle installed on the multiple exhaust ports 106 in the germination tank body 104 through the exhaust pipe 110, so that the rice in the germination tank body 104 receives water evenly, and the germination tank body 104 maintains a certain humidity during the enrichment process, which is conducive to the enrichment of GABA and its migration into the grains.

[0062] The air supply heating device comprises a heater 5, a fresh air control valve 4 and an induced draft fan 6; the second air outlet of the induced draft fan 6 is connected to the germination tank body 104 through a pipeline, and the pipeline connecting the second air outlet of the induced draft fan 6 and the germination tank body 104 is provided with a heater 5 and a fresh air control valve 4; the heater 5 is used to heat the air in the pipeline, and in the enrichment process, hot air is introduced into the germination tank body 104 to increase the temperature in the germination tank body 104, activate glutamate decarboxylase, and generate GABA; and in the drying process, after the steam generator stops working, hot air is introduced into the germination tank body 104 to make the germination tank body 104 reach a certain temperature, thereby reducing the moisture content of the rice.

[0063] The drying exhaust device comprises a drying exhaust valve 2, an exhaust pipe 110 and an exhaust port 106 disposed on the middle shaft 105 in the germination tank body 104, and is used to exhaust water vapor after the enrichment is completed and during the drying process to reduce the humidity in the tank and achieve the purpose of drying.

[0064] In a specific embodiment of the present invention, the second air outlet of the induced draft fan 6 is connected to the exhaust pipe 110 of the germination tank body 104 through a pipeline, and an isolation control valve 3 is arranged between the fresh air control valve 4 and the exhaust valve 2; when exhaust is required, the isolation control valve 3 is closed, and the exhaust valve 2 is opened, so that the gas discharged from the exhaust pipe 110 is discharged through the exhaust valve 2; when air is needed to be supplied to the germination tank body 104 for heating, the isolation control valve 3 is opened, and the exhaust valve 2 is closed, so that hot air enters the germination tank body 104 through the exhaust pipe 110, and the flow rate of hot air entering is controlled by the fresh air control valve 4.

[0065] A sewage pipe is also provided, which is connected to the steam pipe and the sewage outlet of the wet heat mixer 7 respectively; a steam trap 13 is provided on the pipeline connecting the sewage pipe and the steam pipe.

[0066] A method for enriching GABA in rice, using the rice GABA enrichment device based on flowing water and heat treatment to enrich GABA in rice, comprising the following steps:

[0067] During the enrichment of GABA in rice, the horizontal germination tank 1 humidifies the rice by means of a steam generating device and a spray humidifying device of a flow water-adding wet heat treatment device, and heats the rice by means of a flow water-adding wet heat treatment device, so that the water content and temperature required for enrichment are reached in the germination tank body 104, and the germination tank body 104 is rotated while atomizing water and heating, and the rotation of the germination tank body 104 drives the rice inside to move, so that the rice is evenly exposed to temperature, humidity and oxygen, and the rice is enriched with GABA in a hot and humid environment, and GABA is continuously generated and migrates to the inside of the grain along with the water, and the rice is dried after the enrichment is completed;

[0068] The humidity sensor 14 in the tank detects the humidity in the tank body 104 of the germination tank in real time, and the temperature sensor 15 in the tank detects the temperature in the tank body 104 of the germination tank in real time, and transmits the detected humidity and temperature data to the control unit, and the control unit compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to start supplying steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust and reduce the humidity; when the temperature is lower than the preset temperature, the air supply heating device is controlled to start, and hot air is sent into the tank body 104 of the germination tank;

[0069] After the enrichment is completed and during the drying process, the drying exhaust device is controlled to discharge water vapor.

[0070] In the above scheme, the flow water heat treatment is to humidify the rice in the germination tank body 104 by atomization humidification at a humidification rate of 0.5% / h to 2.5% / h until the moisture content of the rice reaches 18% to 24%; the purpose of humidifying the rice is to activate glutamate decarboxylase after the moisture content of the rice is increased, catalyze the decarboxylation reaction of glutamate, and generate GABA;

[0071] The heating is to maintain the relative humidity of the air in the germination tank body 104 at 75% to 95% and the temperature at 55 to 75° C. by means of an air supply heating device; the purpose of heating the rice is to increase the activity of glutamate decarboxylase, catalyze the decarboxylation reaction of glutamate, and generate GABA;

[0072] The enrichment process is to keep the temperature of the germination tank body 104 at 55-75°C by the air supply heating device, and keep the moisture in the rice at 18%-24%, and keep it for 4-6 hours under the condition that the germination tank is constantly rotated;

[0073] The GABA migration utilizes the water solubility and concentration gradient of GABA to make it migrate to the inside of the grain while it is continuously generated, gradually diffusing the GABA with a higher concentration in the germ part of the rice grain to the endosperm part, thereby increasing the GABA content in the white rice prepared from the rice grain;

[0074] The drying is to keep the air temperature in the germination tank body 104 at 35-50°C by the air supply heating device to dry the rice, and reduce the humidity in the germination tank body 104 to 10-30% by the induced draft fan 6, and continuously rotate the germination tank body 104 until the moisture in the rice reaches 12%-14.5%. Low-temperature drying can ensure that the nutrients in the brown rice are not lost, and the water diffuses slowly from the inside to the outside, so that the rice has better processability and nutritional quality.

[0075] A rice grain rich in GABA is obtained by enriching the GABA in the rice grain using the device for enriching the rice grain GABA based on the flow-added water-heat treatment and according to the method for enriching the GABA in the rice grain.

[0076] Example 1

[0077] The rice with a moisture content of 14% is removed from the impurities and husks, and is loaded into a horizontal germination tank 1. Then, the rice in the tank is sprayed with water at a rate of 0.7% / h through the flow water-adding and wet heat treatment device, so that the moisture content of the rice reaches 18%. While spraying water, hot air is introduced into the germination tank body 104, so that the temperature in the germination tank is 55° C. and the humidity is 95%. While atomizing water and heating, the germination tank body 104 is rotated by the rotating mechanism, and the germination tank body 104 drives the rice to move when it rotates. In this way, the rice is evenly exposed to temperature, humidity, and oxygen, and is enriched for 6 hours under this condition. During the enrichment process, the humidity sensor 14 in the tank detects the humidity in the germination tank body 104 in real time, and the temperature sensor 15 in the tank detects the temperature in the germination tank body 104 in real time, and transmits the detected humidity and temperature data to the control unit, which compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to start supplying steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust and reduce the humidity; when the temperature is lower than the preset temperature, the air supply heating device is controlled to start and send hot air into the germination tank body 104; after the enrichment is completed, cold air is introduced to reduce the temperature in the germination tank body 104 to 35°C, and the humidity is reduced to 10% by the induced draft fan, and the germination tank is continuously rotated. Under this condition, the moisture content of the rice is dried to about 14%.

[0078] The processing quality of brown rice under different enrichment methods is shown in Table 1. The GABA content in the brown rice and white rice prepared from the rice treated by the enrichment device of the present invention increases from 42.26 mg / kg and 8.03 mg / kg to 246 mg / kg and 205 mg / kg, respectively. The GABA content in the brown rice and white rice treated by the flow-added water-heat treatment is 1.44 times and 1.99 times that of the traditional soaking germination method, and 1.22 times and 1.24 times that of the method adopted by the patent CN205597054U; the GABA content in the soaked and germinated white rice accounts for 60% of the whole grain, while the GABA content in the white rice treated by the flow-added water-heat treatment accounts for 83% of the whole grain. Therefore, the enrichment device and the enrichment method of the present invention can greatly increase the GABA content in brown rice, and are conducive to the migration of GABA into the inside of the grain, thereby improving the nutritional value of brown rice and white rice.

[0079] Table 1 GABA content in brown rice and white rice under different treatments (mg / kg)

[0080]

[0081] Note: GABA content is calculated on a dry basis; different capital letters in the same column indicate significant differences (p < 0.05).

[0082] Example 2

[0083] The rice with a moisture content of 14% is removed from the impurities and husks and loaded into the horizontal germination tank 1. Then, the rice in the germination tank is sprayed with water at a rate of 2.5% / h through the flow water-adding and wet heat treatment device to make the moisture content of the rice reach 24%. While spraying water, hot air is introduced into the germination tank body 104 to make the temperature in the germination tank 75°C and the humidity 75%. While atomizing water and heating, the germination tank body 104 is rotated by the rotating mechanism, and the germination tank body 104 drives the rice to move when it rotates. In this way, the rice is evenly exposed to temperature, humidity and oxygen, and is enriched for 4 hours under this condition. During the enrichment process, the humidity sensor 14 in the tank detects the humidity in the germination tank body 104 in real time, and the temperature sensor 15 in the tank detects the temperature in the germination tank body 104 in real time, and transmits the detected humidity and temperature data to the control unit, and the control unit compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to start supplying steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust and reduce the humidity; when the temperature is lower than the preset temperature, the air supply heating device is controlled to start, and hot air is sent into the germination tank body 104; after the enrichment is completed, cold air is introduced to reduce the temperature in the germination tank to 50°C, and the humidity is reduced to 30% by the induced draft fan, and the germination tank is continuously rotated. Under this condition, the moisture content of the rice is dried to about 12%.

[0084] The cracking rate and total bacterial count of brown rice under different enrichment methods are shown in Table 2. Compared with soaking germination, the cracking rate of rice treated by the enrichment device of the present invention is lower; compared with the untreated raw brown rice, soaking germination can greatly increase the total bacterial count in brown rice, but the total bacterial count in brown rice after four cycles of wet heat treatment is significantly reduced. Therefore, in the enrichment device and enrichment method of the present invention, lower water addition amount, shorter enrichment time, and higher enrichment temperature can make brown rice have better processing quality and sanitary quality.

[0085] Table 2 The cracking rate and total bacterial count of brown rice under different treatments

[0086]

[0087] Note: Different letters in the same column indicate significant differences (p<0.05).

[0088] Example 3

[0089] The rice with a moisture content of 14% is removed from the impurities and husks and loaded into the horizontal germination tank 1. Then, the rice in the germination tank is sprayed with water at a rate of 1.5% / h through the flow water-adding and wet heat treatment device to make the moisture content of the rice reach 21%. While spraying water, hot air is introduced into the germination tank body 104 to make the temperature in the germination tank body 104 to be 65° C. and the humidity to be 85%. The germination tank is rotated while atomizing water and heating, and the rotation of the germination tank drives the rice to move. In this way, the rice is evenly exposed to temperature, humidity and oxygen, and is enriched for 5 hours under this condition. During the enrichment process, the humidity sensor 14 in the tank detects the humidity in the germination tank body 104 in real time, and the temperature sensor 15 in the tank detects the temperature in the germination tank body 104 in real time, and transmits the detected humidity and temperature data to the control unit, and the control unit compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to start supplying steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust and reduce the humidity; when the temperature is lower than the preset temperature, the air supply heating device is controlled to start, and hot air is sent into the germination tank body 104; after the enrichment is completed, cold air is introduced to reduce the temperature in the germination tank to 45°C, and the humidity is reduced to 20% by the induced draft fan, and the germination tank is continuously rotated. Under this condition, the moisture content of the rice is dried to about 13%.

[0090] The processing quality of brown rice under different enrichment methods is shown in Table 3. Compared with soaking and germination, the brown rice and white rice prepared by using the rice treated by the enrichment device of the present invention have lower hardness and higher adhesion. Therefore, the enrichment device and enrichment method of the present invention can improve the edible quality of brown rice and white rice.

[0091] Table 3 Texture characteristics of brown rice / white rice under different treatments

[0092]

[0093] Note: Different capital letters in the same column indicate significant differences among brown rice (p<0.05), and different lowercase letters in the same column indicate significant differences among white rice (p<0.05).

[0094] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0095] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rice GABA enrichment device based on flowing water heat treatment, characterized in that: It comprises a horizontal germination tank (1), a flow-added water and heat treatment device, a humidity sensor (14) in the tank, a temperature sensor (15) in the tank and a control unit; The flow-water-addition heat treatment device is connected to a horizontal germination tank (1); the flow-water-addition heat treatment device comprises a steam generating device, a spray humidifying device, an air supply heating device and a drying exhaust device; the steam generating device and the spray humidifying device are connected to an air inlet pipe (110) of the horizontal germination tank (1), and the air supply heating device and the drying exhaust device are connected to an exhaust pipe (110) of the horizontal germination tank (1); The germination tank body (104) is provided with an in-tank humidity sensor (14) and an in-tank temperature sensor (15); the in-tank humidity sensor (14) is used to detect the humidity in the germination tank body (104); the in-tank temperature sensor (15) is used to detect the temperature in the germination tank body (104); During the enrichment process, the germination tank body (104) rotates continuously and drives the rice inside to move. The humidity sensor (14) in the tank detects the humidity in the germination tank body (104) in real time. The temperature sensor (15) in the tank detects the temperature in the germination tank body (104) in real time and transmits the detected data to the control unit. The control unit compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to start supplying steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust. When the temperature is lower than the preset temperature, the air supply heating device is controlled to start. After the enrichment is completed and during the drying process, the drying exhaust device is controlled to exhaust water vapor.

2. The rice GABA enrichment device based on the flow-added water heat treatment according to claim 1 is characterized in that, The horizontal germination tank (1) comprises a germination tank body (104), an intermediate shaft (105) and a rotating mechanism; The germination tank body (104) is provided with a humidity detection port (101), an observation port (102) and a feeding port (103); one end of the intermediate shaft (105) penetrates into the germination tank body (104), and the other end is located outside the germination tank body (104) and connected to the first bearing (109); The exhaust pipe (110) and the air intake pipe (111) are installed on the intermediate shaft (105) of the germination tank body (104); a section of the exhaust pipe (110) located inside the germination tank body (104) is provided with a plurality of exhaust ports (106); a section of the air intake pipe (111) located inside the germination tank body (104) is provided with a plurality of air intake ports (107); The germination tank body (104) is connected to a rotating mechanism, and the rotating mechanism drives the germination tank body (104) to rotate.

3. The rice GABA enrichment device based on the flow-added water heat treatment according to claim 2 is characterized in that, The rotating mechanism comprises a motor (112), a driving shaft, a driven shaft, a second bearing (113), a coupling (115), a roller (16) and a transmission mechanism; The output shaft of the motor (112) is connected to the driving shaft, the driving shaft is connected to the driven shaft through a coupling (115), and the driving shaft and the driven shaft are respectively supported by second bearings (113); the roller (16) comprises two driving wheels and two driven wheels; the driving wheel is mounted on the driving shaft, the driven wheel is mounted on the driven shaft, the driving wheel and the driven wheel are respectively connected to the germination tank body (104) through a transmission mechanism, so as to drive the germination tank body (104) to rotate.

4. The rice GABA enrichment device based on the flow-added water heat treatment according to claim 2 is characterized in that, The discharging auxiliary mechanism comprises a push rod motor (114), a third bearing (17), and a fastening connection member (18); One end of the push rod motor (114) is connected to one side of the germination tank body (104), and the fastening connector (18) is arranged on the other side of the germination tank body (104), and the fastening connector (18) is connected to the third bearing (17).

5. The rice GABA enrichment device based on the flow-added water heat treatment according to claim 1 is characterized in that, The steam generating device comprises a steam generator, a steam pressure reducing valve (12) and a steam automatic valve (11); The spray humidifying device comprises a water supply mechanism, a wet heat mixer (7), a temperature sensor (8), a flow meter (9) and a solenoid valve (10); The steam generator is connected to the air inlet of the wet heat mixer (7) through a pipeline, the water supply mechanism is connected to the water inlet of the wet heat mixer (7) through a pipeline, water vapor and cold water are mixed in the wet heat mixer (7), a steam pressure reducing valve (12) and a steam automatic valve (11) are provided on the pipeline connecting the steam generator and the wet heat mixer (7); a flow meter (9) and a solenoid valve (10) are provided on the pipeline connecting the water supply mechanism and the wet heat mixer (7); the air inlet of the wet heat mixer (7) is connected to the first air outlet of the induced draft fan (6) through a pipeline, and the air outlet of the wet heat mixer (7) is connected to the first air outlet of the induced draft fan (6) through a pipeline. The germination tank (104) is connected to the germination tank through a pipeline and an air inlet pipe (111); a temperature sensor (8) is provided on the pipeline connecting the humid heat mixer (7) and the air inlet pipe (111) for detecting the temperature at the outlet of the humid heat mixer (7); when the water vapor and the cold water are mixed in the humid heat mixer (7) to a preset enrichment temperature, the control unit controls the induced draft fan (6) to transport the mixed gas-liquid mixture into the germination tank body (104), and sprays the gas-liquid mixture into the germination tank body (104) in the form of atomization and water addition through atomizing nozzles installed on a plurality of exhaust ports (106) in the germination tank body (104) through the exhaust pipe (110).

6. The rice GABA enrichment device based on the flow-added water heat treatment according to claim 1 is characterized in that: The air supply heating device comprises a heater (5), a fresh air control valve (4) and an induced draft fan (6); a second air outlet of the induced draft fan (6) is connected to the germination tank body (104) through a pipeline, and a heater (5) and a fresh air control valve (4) are provided on the pipeline connecting the second air outlet of the induced draft fan (6) and the germination tank body (104).

7. The rice GABA enrichment device based on the flow-added water heat treatment according to claim 6 is characterized in that: The dry exhaust device comprises a dry exhaust valve (2), an exhaust pipe (110) and an exhaust port (106) disposed on an intermediate shaft (105) in a germination tank body (104). The second air outlet of the induced draft fan (6) is connected to the exhaust pipe (110) of the germination tank body (104) through a pipeline, and an isolation control valve (3) is arranged between the fresh air control valve (4) and the exhaust valve (2); when exhaust is required, the control unit closes the isolation control valve (3) and opens the exhaust valve (2), so that the gas exhausted from the exhaust pipe (110) is exhausted through the exhaust valve (2); when air is required to be supplied to the germination tank body (104) for heating, the isolation control valve (3) is opened and the exhaust valve (2) is closed, so that hot air enters the germination tank body (104) through the exhaust pipe (110); the fresh air control valve (4) is used to control the flow rate of the hot air entering.

8. A method for enriching GABA in rice, characterized in that: The rice GABA enrichment device based on the flow-added water-heat treatment according to any one of claims 1 to 7 is used to enrich the GABA in the rice, comprising the following steps: During the enrichment of GABA in rice grains, the horizontal germination tank (1) humidifies the rice grains by means of a steam generating device and a spray humidifying device of a flow water-adding wet heat treatment device, and heats the rice grains by means of a flow water-adding wet heat treatment device, and heats the rice grains by means of an air supply heating device, so that the water content and temperature required for enrichment are reached in the germination tank body (104). The germination tank body (104) is rotated while atomizing water and heating the rice grains. The rotation of the germination tank body (104) drives the rice grains inside to move, so that the rice grains are evenly exposed to temperature, humidity and oxygen. The rice grains are enriched with GABA in a wet and hot environment, and GABA is continuously generated and migrates into the grains along with the water. After the enrichment is completed, the rice grains are dried. The humidity sensor (14) in the tank detects the humidity in the tank body (104) of the germination tank in real time, and the temperature sensor (15) in the tank detects the temperature in the tank body (104) of the germination tank in real time, and transmits the detected humidity and temperature data to the control unit, and the control unit compares the detected value with the target preset value. When the humidity is lower than the preset humidity, the steam generator and the spray humidification device are controlled to start supplying steam to increase the relative humidity. When the humidity is higher than the preset humidity, the drying exhaust device is controlled to exhaust and reduce the humidity; when the temperature is lower than the preset temperature, the air supply heating device is controlled to start to send hot air into the tank body (104) of the germination tank; After the enrichment is completed and during the drying process, the drying exhaust device is controlled to discharge water vapor.

9. The method for enriching GABA in rice according to claim 8, characterized in that: The flow water addition heat treatment is to humidify the rice in the germination tank body (104) by atomizing humidification at a humidification rate of 0.5% / h to 2.5% / h until the water content of the rice reaches 18% to 24%. When the water content of the rice is increased, glutamate decarboxylase is activated to catalyze the decarboxylation reaction of glutamate to generate GABA; The heating is to maintain the relative humidity of the air in the germination tank body (104) at 75% to 95% and the temperature at 55 to 75° C. by means of an air supply heating device, thereby increasing the activity of glutamate decarboxylase, catalyzing the decarboxylation reaction of glutamate, and generating GABA; The enrichment process is to keep the temperature of the germination tank body (104) at 55-75°C by means of an air supply heating device, while keeping the moisture content of the rice at 18%-24%, and keep it for 4-6 hours under the condition that the germination tank is continuously rotated; The GABA migration utilizes the water solubility and concentration gradient of GABA to make it migrate into the grain while it is continuously generated, and gradually diffuses the GABA with a higher concentration in the rice germ to the endosperm; The drying process is to keep the air temperature in the germination tank body (104) at 35-50°C by means of an air supply heating device to dry the rice, and to reduce the humidity in the germination tank body (104) to 10-30% by means of an induced draft fan (6), while continuously rotating the germination tank body (104) until the moisture content in the rice reaches 12%-14.5%.

10. A rice grain rich in GABA, characterized in that: The rice GABA enrichment device based on flowing water and heat treatment according to any one of claims 1 to 7 is used to enrich GABA in rice according to the method for enriching GABA in rice according to claim 8 or 9 to obtain the rice GABA.

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