CN108315251A - A kind of strain fermentation control system - Google Patents

Abstract

The invention discloses a strain fermentation control system, which relates to the technical field of biological fermentation. The invention includes a fermentation tank, a controller and a plurality of fermentation parameter feedback control modules. When the invention is used, each fermentation parameter feedback control module will control the fermentation Each parameter in the tank is collected and fed back to the controller, and the controller controls the fermentation parameter feedback control module to adjust the parameters in the fermentation tank according to the obtained parameters. The present invention is flexible in application, and the feedback of each parameter is independent and fast.

Description

A strain fermentation control system

technical field

The invention relates to the technical field of biological fermentation, in particular to a strain fermentation control system.

Background technique

The level of microbial fermentation production mainly depends on the heredity and culture conditions of the strain itself. In some fermentation fields, such as strain fermentation, in order to ensure the growth rate and quality of strains, how to optimize the culture conditions and accurately control the fermentation parameters is a research focus and hotspot. The current automatic fermentation control system is mostly controlled by computer or PLC. When using computer control, because there are certain problems in the stability of the existing operating system, the situation of computer crash is often encountered, which will affect the fermentation experiment, and directly lead to fermentation failure in severe cases. When PLC control is used, the control of each fermentation parameter is not precise and independent, and the requirements for PLC programming are high, and the system is complicated.

Contents of the invention

The purpose of the present invention is to solve the above problems. The present invention provides a strain fermentation control system; when it is applied, online data collection can be completed in time, and online real-time control can be performed according to the collected data.

The purpose of the present invention is mainly achieved through the following technical solutions:

A strain fermentation control system includes a fermenter, and also includes a controller and a plurality of fermentation parameter monitoring modules, and the controller is used to control the plurality of fermentation parameter monitoring modules to adjust the fermentation parameters in the fermenter.

Further, the controller communicates with the fermentation parameter monitoring module through the RS485 bus to control the fermentation parameters in the fermenter, and the fermentation parameter monitoring module includes a temperature monitoring module, a pH monitoring module, a dissolved oxygen monitoring module, a stirring speed monitoring module, Foam monitoring module, feeding control module, air flow monitoring module and tank pressure monitoring module;

The temperature monitoring module is used to collect temperature data in the fermenter and feed it back to the controller, and the temperature monitoring module can control the temperature in the fermenter; if the temperature data meets the fermentation requirements, the controller does not give instructions; if the temperature data does not If the fermentation requirements are met, the controller controls the temperature monitoring module to change the temperature in the fermenter;

The pH monitoring module is used to collect the pH value in the fermenter and feed it back to the controller, and the pH monitoring module can control the pH value in the fermenter; if the pH value meets the fermentation requirements, the controller will not give instructions; if the pH value If the fermentation requirements are not met, the controller controls the pH monitoring module to change the pH value in the fermenter;

The dissolved oxygen monitoring module is used to collect the dissolved oxygen value in the fermenter and feed it back to the controller. At the same time, the dissolved oxygen monitoring module can control the dissolved oxygen value in the fermenter; if the dissolved oxygen value meets the fermentation requirements, the controller does not indication; if the dissolved oxygen value does not meet the fermentation requirements, the controller controls the dissolved oxygen monitoring module to change the dissolved oxygen value in the fermenter;

The stirring speed monitoring module is used to collect the stirring speed data in the fermenter and feed it back to the controller, and the stirring speed monitoring module can control the stirring speed in the fermenter; if the stirring speed data meets the fermentation requirements, the controller will not give instructions ; If the stirring speed data does not meet the fermentation requirements, the controller controls the stirring speed monitoring module to change the stirring speed in the fermenter;

The foam monitoring module is used to collect the amount of foam in the fermenter and feed it back to the controller, and the foam monitoring module can control the amount of foam in the fermenter; if the amount of foam meets the fermentation requirements, the controller will not give instructions; if the amount of foam If the fermentation requirements are not met, the controller controls the foam monitoring module to change the amount of foam in the fermenter;

The feed control module is used to feed the fermenter, and the controller controls the feed control module to feed the fermenter;

The air flow monitoring module is used to monitor the air flow in the fermentation process and feed back to the controller, which can control the dissolved oxygen of the fermenter;

The tank pressure monitoring module is used to collect the pressure value in the fermentation tank and feed it back to the controller, and the tank pressure monitoring module can control the pressure value in the fermentation tank; if the pressure value meets the fermentation requirements, the controller will not give instructions; if If the pressure value does not meet the fermentation requirements, the controller controls the tank pressure monitoring module to change the pressure value in the fermentation tank.

Further, the temperature monitoring module includes a temperature probe, a hot water tank, a cold water tank, an electric heating rod and two temperature-controlled water pumps, and the electric heating rod is located in the hot water tank for heating to generate hot water; one temperature-controlled water pump The two ends are respectively connected to the hot water tank and the fermentation tank, and the two ends of the other temperature-controlled water pump are respectively connected to the cold water tank and the fermentation tank; Send it to the controller through RS485 bus communication, and the controller controls the start and stop of two temperature-controlled water pumps according to the temperature data to control the temperature in the fermenter.

Further, the pH monitoring module includes a pH probe, a lye tank, an acid tank, an acid-adding peristaltic pump and an alkali-adding peristaltic pump, wherein the two ends of the alkali-adding peristaltic pump are respectively connected with the lye tank and the fermenter, The two ends of the peristaltic pump are respectively connected with the acid tank and the fermentation tank, and the pH probe is inserted into the fermentation tank to collect the pH value in the fermentation tank, and the pH value is sent to the controller through the RS485 bus communication, and the controller according to The received pH value is used to control the start and stop of the peristaltic pump for adding acid and alkali so as to control the pH value in the fermenter.

Further, the dissolved oxygen monitoring module includes a dissolved oxygen signal transmitter and a dissolved oxygen probe, the dissolved oxygen probe sends the detected signal to the dissolved oxygen signal transmitter, and the dissolved oxygen signal transmitter sends the dissolved oxygen The signal sent by the probe is converted into the actual dissolved oxygen value that can be read. The dissolved oxygen signal transmitter sends the dissolved oxygen value to the controller through RS485 bus communication. The controller sends the air flow monitoring module and stirring speed monitoring according to the dissolved oxygen value The module sends control commands to control the dissolved oxygen value in the fermenter.

Further, the stirring speed monitoring module includes a frequency converter and a stirring motor, the output end of the stirring motor is provided with a stirring paddle, the stirring paddle of the stirring motor is located inside the fermenter, and the frequency converter communicates with the controller through the RS485 bus. The frequency converter is connected to the stirring motor, and the controller sends control instructions to the frequency converter to control the stirring speed of the stirring motor.

Further, the foam monitoring module includes a foam probe, a defoaming peristaltic pump and a defoaming liquid tank, the foam probe is inserted into the fermenter from the top of the fermenter, and the two ends of the defoaming peristaltic pump are respectively connected to the fermenter and the defoaming tank. Foam liquid tank, defoamer is filled in the defoamer liquid tank, and described controller controls the start and stop of defoaming peristaltic pump according to the signal detected by foam probe; The foam peristaltic pump starts, and the defoaming peristaltic pump pumps the defoamer in the defoaming liquid tank into the fermenter for defoaming.

Further, the feeding control module includes a feeding tank and a feeding peristaltic pump, the two ends of the feeding peristaltic pump are respectively connected to the feeding tank and the fermenter, and the controller controls the starting of the feeding peristaltic pump according to fermentation requirements. Stop to refill the fermenter.

Further, the air flow monitoring module includes an air flow meter and an air intake valve, the air intake valve is located outside the fermenter, the two ends of the air flow meter are respectively connected to the air intake valve and the fermenter, and the air flow meter and the controller are connected via RS485 Bus communication, the controller controls the opening degree of the intake valve according to the dissolved oxygen value so as to control the flow rate of the incoming air.

Further, the tank pressure monitoring module includes a tank pressure measurement sensor and an exhaust valve, the detection end of the tank pressure measurement sensor extends into the fermenter, the tank pressure measurement sensor communicates with the controller through the RS485 bus, and the tank pressure measurement sensor will The pressure value in the fermentation tank is fed back to the controller, and the controller controls the opening and closing of the exhaust valve according to the pressure value so as to control the pressure value in the fermentation tank.

By using the present invention, the following beneficial effects can be produced: the present invention includes a fermenter, a controller and a plurality of fermentation parameter monitoring modules. When the present invention is in use, each fermentation parameter monitoring module will monitor and feed back each parameter in the fermenter to the controller, and the controller sends control instructions to each fermentation parameter monitoring module according to the obtained measured values so as to realize the control of various parameters in the fermenter. When the present invention is applied, the fermentation parameters can be flexibly controlled through the corresponding fermentation parameter monitoring module, and each fermentation parameter is also fed back to the controller in real time, so as to realize the monitoring of the entire fermentation process by the controller, thereby ensuring the accuracy and reliability of the fermentation process the completion.

Description of drawings

The drawings described here are used to provide a further understanding of the embodiments of the present invention, constitute a part of the application, and do not limit the embodiments of the present invention. In the attached picture:

Fig. 1 is a system structure diagram of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples and accompanying drawings. As a limitation of the present invention.

As shown in Figure 1, a kind of strain fermentation control system, comprises fermentor, also comprises controller and various fermentation parameter monitoring modules, and controller is used for controlling the fermentation parameter monitoring module to adjust the fermentation parameter in fermenter; Preferably, The controller is connected to each fermentation parameter monitoring module through the RS485 bus to control the fermentation parameters in the fermentation tank; the communication protocol adopts MODBUS-RTU; the fermentation parameter monitoring module includes a temperature monitoring module, a PH monitoring module, a dissolved oxygen monitoring module, and a stirring speed monitoring module , foam monitoring module, feeding control module, air flow monitoring module and tank pressure monitoring module.

Specifically, the controller communicates with the fermentation parameter monitoring module through the RS485 bus to control the fermentation parameters in the fermentation tank;

The temperature monitoring module is used to collect the temperature data in the fermentation tank and feed it back to the controller. At the same time, the temperature monitoring module can control the temperature in the fermentation tank; if the temperature data meets the fermentation requirements, the controller will not give instructions; if the temperature data does not meet the fermentation requirements If required, the controller controls the temperature monitoring module to change the temperature in the fermenter; correspondingly, the temperature monitoring module includes a temperature probe, a hot water tank, a cold water tank, an electric heating rod and two temperature-controlled water pumps, and the electric heating rod is located in the hot water tank. Inside the tank, it is used for heating to generate hot water; the two ends of one temperature-controlled water pump are respectively connected with the hot water tank and the fermentation tank, and the two ends of the other temperature-controlled water pump are respectively connected with the cold water tank and the fermentation tank; the temperature probe extends into the fermentation tank It is used to collect the temperature data in the fermenter. The temperature data is sent to the controller through RS485 bus communication. The controller controls the start and stop of the two temperature-controlled water pumps according to the temperature data to control the temperature in the fermenter.

The PH monitoring module is used to collect the PH value in the fermenter and feed it back to the controller. At the same time, the PH monitoring module can control the PH value in the fermenter; if the PH value meets the fermentation requirements, the controller will not give instructions; if the PH value does not meet the requirements Fermentation requirements, then the controller controls the pH monitoring module to change the pH value in the fermenter; wherein, the pH monitoring module includes a pH probe, an alkali tank, an acid tank, an acid peristaltic pump and an alkali peristaltic pump, wherein the alkali peristaltic The two ends of the pump are respectively connected with the lye tank and the fermentation tank, and the two ends of the acid-adding peristaltic pump are respectively connected with the acid tank and the fermentation tank. The pH probe is inserted into the fermentation tank to collect the pH value in the fermentation tank. Using INPRO3030/120, the pH probe sends the pH value to the pH signal transmitter, and the pH signal transmitter adopts the pH2050e transmitter; the pH signal transmitter sends the pH value to the controller through RS485 bus communication, and the controller according to The received pH value is used to control the start and stop of the peristaltic pump for adding acid and alkali so as to control the pH value in the fermenter.

The dissolved oxygen monitoring module is used to collect the dissolved oxygen value in the fermenter and feed it back to the controller. At the same time, the dissolved oxygen monitoring module can control the dissolved oxygen value in the fermenter; if the dissolved oxygen value meets the fermentation requirements, the controller will not give instructions; If the dissolved oxygen value does not meet the fermentation requirements, the controller controls the dissolved oxygen monitoring module to change the dissolved oxygen value in the fermenter; the dissolved oxygen monitoring module includes a dissolved oxygen signal transmitter and a dissolved oxygen probe, and the dissolved oxygen probe detects it. The signal is sent to the dissolved oxygen signal transmitter, the dissolved oxygen signal transmitter converts the signal sent by the dissolved oxygen probe into the actual dissolved oxygen value that can be read, and the dissolved oxygen signal transmitter sends the dissolved oxygen value through RS485 bus communication To the controller, the controller sends control instructions to the air flow monitoring module and stirring speed monitoring module according to the dissolved oxygen value to control the dissolved oxygen value in the fermenter; specifically, the dissolved oxygen probe here uses INPRO6800/120, and the dissolved oxygen signal changes Transmitter adopts DO4050e transmitter

The stirring speed monitoring module is used to collect the stirring speed data in the fermenter and feed it back to the controller. At the same time, the stirring speed monitoring module can control the stirring speed in the fermenter; if the stirring speed data meets the fermentation requirements, the controller will not give instructions; if If the stirring speed data does not meet the fermentation requirements, the controller controls the stirring speed monitoring module to change the stirring speed in the fermenter; the stirring speed monitoring module includes a frequency converter and a stirring motor, and the frequency converter here uses a three-ring SH-HVF II10K/600 type; The output end of the stirring motor is equipped with a stirring paddle, the stirring paddle of the stirring motor is located inside the fermentation tank, the frequency converter communicates with the controller through the RS485 bus, the frequency converter is connected with the stirring motor, and the controller sends control commands to the frequency converter to control the stirring motor stirring speed.

The foam monitoring module is used to collect the amount of foam in the fermenter and feed it back to the controller. At the same time, the foam monitoring module can control the amount of foam in the fermenter; if the amount of foam meets the fermentation requirements, the controller will not give instructions; if the amount of foam does not meet the requirements Fermentation requirements, then the controller controls the foam monitoring module to change the amount of foam in the fermenter; the foam monitoring module includes a foam probe, a defoaming peristaltic pump and a defoaming liquid tank, the foam probe is inserted into the fermenter from the top of the fermenter, The two ends of the peristaltic pump are respectively connected to the fermentation tank and the defoaming liquid tank. The defoaming liquid tank is filled with defoaming agent. The controller controls the start and stop of the defoaming peristaltic pump according to the signal detected by the foam probe; When there is excessive foam, the controller controls the defoaming peristaltic pump to start, and the defoaming peristaltic pump pumps the defoaming agent in the defoaming liquid tank into the fermenter for defoaming. The controller generally controls the start and stop of the defoaming peristaltic pump through the level signal. If the general state of the signal sent by the foam probe is a high level signal, when the foam is detected, the level signal of the foam probe is converted into a low level, and the low level signal is low. After the level signal is sent to the controller, the controller will start the defoaming peristaltic pump. The above working principle and method are the working principles built into the foam probe.

The feeding control module is used to feed the fermenter, and the controller controls the feeding control module to feed the fermenter; the feeding control module includes a feeding tank and a feeding peristaltic pump, and the two ends of the feeding peristaltic pump The feeding tank and the fermentation tank are respectively connected, and the controller controls the start and stop of the feeding peristaltic pump to feed the fermentation tank according to the fermentation requirements. The control parameters for feeding before fermentation need to be set in the controller. After the fermentation starts, the controller will feed the fermenter by starting the feeding peristaltic pump at an appropriate time according to the set parameters.

The air flow monitoring module is used to monitor the air flow during the fermentation process and feed it back to the controller, which can control the dissolved oxygen in the fermenter; the air flow monitoring module includes an air flow meter and an intake valve, and the model of the air flow controller here is D07-7M/ZM (0-6SLM); the air intake valve is located outside the fermentation tank, the two ends of the air flow meter are respectively connected to the intake valve and the fermentation tank, the air flow meter and the controller communicate through the RS485 bus, and the controller according to the dissolved oxygen value To control the opening of the intake valve to control the size of the air flow; the size of the air flow affects the amount of dissolved oxygen in the fermentation process. If the measured value of dissolved oxygen is less than the set value, the air flow monitoring module will control the increase of the air flow Thereby increasing the dissolved oxygen in the fermentation broth.

The tank pressure monitoring module is used to collect the pressure value in the fermentation tank and feed it back to the controller. At the same time, the tank pressure monitoring module can control the pressure value in the fermentation tank; if the pressure value meets the fermentation requirements, the controller will not give instructions; if the pressure value If the fermentation requirements are not met, the controller controls the tank pressure monitoring module to change the pressure value in the fermentation tank; the tank pressure monitoring module includes a tank pressure measurement sensor and an exhaust valve, the detection end of the tank pressure measurement sensor extends into the fermentation tank, and the tank pressure The measurement sensor communicates with the controller through the RS485 bus. The tank pressure measurement sensor feeds back the pressure value in the fermentation tank to the controller. The model of the tank pressure measurement sensor here is PMC534-11EE2P6(T), and the controller controls the exhaust according to the pressure value. The opening and closing of the valve controls the pressure value in the fermenter.

In a preferred embodiment:

It also includes the upper computer, the control chip of the controller adopts STM32, the upper computer can use a computer to complete the human-computer interaction, the upper computer collects and displays each parameter of the controller, and transmits the parameters that need to be set to the controller through the upper computer. In the temperature monitoring module, the temperature-controlled water pump and the solenoid valve work together to control the temperature rise and fall. The electric heating method is used to heat the water body in the hot water tank. The tank temperature control state is divided into automatic control or manual control, and the tank temperature automatic control control mode It is PID fixed value control or PID sequence control. When the tank temperature is manually controlled, it can be directly controlled by manual temperature rise or fall. The set value of the tank temperature (temperature rise) control (the set value of the temperature control control will automatically follow the change), the upper limit deviation alarm value and the upper limit alarm value can be set through the parameter setting function item on the computer. When the tank temperature electric heating temperature rise control is required, set the set value of the tank temperature (temperature rise) control, and set the tank temperature rise control state to the automatic position. When the measured value of the tank temperature is lower than the set value of the tank temperature, the hot water circulating pump is automatically turned on to control the temperature rise of the tank. When tank temperature cooling control is required, set the tank temperature cooling control state to the automatic position. When the measured value of the tank temperature is greater than the set value of the tank temperature, the electromagnetic valve and the cold water circulating water pump are intermittently opened to control the temperature of the tank. When fermentation needs to use constant temperature water to raise the temperature, the set value of the constant temperature water temperature should be set to be about +2°C~+5°C higher than the set value of the tank temperature. When it is necessary to use constant temperature water to raise the temperature, set the constant temperature water temperature control state to the automatic function state. When the measured value of the constant temperature water temperature is lower than the set value, the constant temperature water electric heating temperature rise control action is automatically performed.

In the stirring speed monitoring module, the stirring speed outputs the control signal from the controller to the frequency converter through STM32, and then controls the stirring motor through the frequency converter. The setting value of the stirring speed control, the upper limit deviation alarm value and the upper limit alarm value can be set through the parameter setting function item on the computer. When stirring speed control is required, set the setting value of stirring speed control, and then turn on this function. In addition, note that the stirring motor is not allowed to start and stop frequently, otherwise it may not work properly due to current overload.

In the dissolved oxygen monitoring module, the dissolved oxygen control is controlled by outputting control instructions from the controller to the frequency converter or the intake valve through STM32, and controlling by adjusting the stirring speed or the intake flow. Set the dissolved oxygen setting value to the required value, and then turn on this function. At this time, the stirring speed (or intake flow) will be automatically adjusted according to the change of dissolved oxygen. The dissolved oxygen alarm mode is upper and lower limit absolute value alarm or no alarm, and the set value of dissolved oxygen control, upper limit deviation alarm value and lower limit deviation alarm value can be set through the parameter setting function item on the computer.

In the PH monitoring module, the PH control uses the STM32 to output the control signal from the controller to the acid and base peristaltic pump for acid or base control. The setting value of PH control, the upper limit deviation alarm value and the lower limit deviation alarm value can be set through the parameter setting function item on the computer. PH control can be controlled automatically or manually, and the control mode of PH automatic control is PID fixed value control or PID sequence control. When the pH measurement value is lower than the pH setting value, the base is added intermittently; when the pH measurement value is higher than the pH setting value, the acid is added intermittently.

The feeding control is completed by directly outputting the control signal from the controller to the feeding peristaltic pump through STM32. Feeding control has automatic control or manual control function. The control mode of feeding automatic control is fixed time proportional control of switching value or time sequence time proportional control of switching value; manual feeding can be directly turned on/off the feeding peristaltic pump.

In the foam monitoring module, the defoaming action is completed by directly outputting control signals from the controller to the defoaming peristaltic pump through STM32. The defoaming control state has automatic control or manual control function: when the defoaming is automatically controlled, the control method is the fixed time proportional control of the switch or the time sequence time proportional control of the switch; when the defoaming is manually controlled, the defoaming peristaltic pump can be turned on and off manually. When there is excessive foam, the system will also give a foam alarm signal.

In the air flow monitoring module, the control of the air flow is accomplished by outputting a control signal from the controller to the intake valve through the STM32, thereby adjusting the opening degree of the intake valve. The air flow automatic control mode is analog PID fixed value control or analog PID sequential control, and the alarm mode is upper and lower limit deviation alarm or no alarm. Parameter setting can set the set value of flow control, the upper limit deviation alarm value and the lower limit deviation alarm value through the parameter setting function item on the computer. During automatic control: 1) Open the cut-off valve of the intake regulating valve and close the bypass valve; 2) After a few minutes, the air flow can be automatically controlled near the set value.

In the tank pressure monitoring module, the control mode of tank pressure automatic control is analog PID fixed value control or analog PID sequence control, and the alarm mode is upper and lower limit deviation alarm or no alarm. Parameter setting: The setting value of the flow control, the upper limit deviation alarm value and the lower limit deviation alarm value can be set through the parameter setting function item on the computer. During automatic control: 1) Open the stop valve of the exhaust regulating valve and close the bypass valve; 2) After a few minutes, the tank pressure can be automatically controlled near the set value.

In the present invention, through the real-time monitoring and control of each module by the controller, various fermentation parameters can be adjusted independently at any time, so that the fermentation process can be automated. And each key module can be switched between manual and automatic modes at any time, making the adjustment of fermentation parameters more flexible.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. A strain fermentation control system, comprising a fermenter, is characterized in that: it also includes a controller and a plurality of fermentation parameter monitoring modules, and the controller is used to control a plurality of fermentation parameter monitoring modules to adjust the fermenter Fermentation parameters. 2. A strain fermentation control system according to claim 1, characterized in that: the controller controls the communication of a plurality of subordinate fermentation parameter monitoring modules to control the fermentation parameters in the fermenter, and the fermentation parameter monitoring modules include Temperature monitoring module, PH monitoring module, dissolved oxygen monitoring module, stirring speed monitoring module, foam monitoring module, feeding control module, air flow monitoring module and tank pressure monitoring module; The temperature monitoring module is used to collect temperature data in the fermenter and feed it back to the controller, and the temperature monitoring module can control the temperature in the fermenter; if the temperature data meets the fermentation requirements, the controller does not give instructions; if the temperature data does not If the fermentation requirements are met, the controller controls the temperature monitoring module to change the temperature in the fermenter; The pH monitoring module is used to collect the pH value in the fermenter and feed it back to the controller, and the pH monitoring module can control the pH value in the fermenter; if the pH value meets the fermentation requirements, the controller will not give instructions; if the pH value If the fermentation requirements are not met, the controller controls the pH monitoring module to change the pH value in the fermenter; The dissolved oxygen monitoring module is used to collect the dissolved oxygen value in the fermenter and feed it back to the controller. At the same time, the dissolved oxygen monitoring module can control the dissolved oxygen value in the fermenter; if the dissolved oxygen value meets the fermentation requirements, the controller does not indication; if the dissolved oxygen value does not meet the fermentation requirements, the controller controls the dissolved oxygen monitoring module to change the dissolved oxygen value in the fermenter; The stirring speed monitoring module is used to collect the stirring speed data in the fermenter and feed it back to the controller, and the stirring speed monitoring module can control the stirring speed in the fermenter; if the stirring speed data meets the fermentation requirements, the controller will not give instructions ; If the stirring speed data does not meet the fermentation requirements, the controller controls the stirring speed monitoring module to change the stirring speed in the fermenter; The foam monitoring module is used to collect the amount of foam in the fermenter and feed it back to the controller, and the foam monitoring module can control the amount of foam in the fermenter; if the amount of foam meets the fermentation requirements, the controller will not give instructions; if the amount of foam If the fermentation requirements are not met, the controller controls the foam monitoring module to change the amount of foam in the fermenter; The feed control module is used to feed the fermenter, and the controller controls the feed control module to feed the fermenter; The air flow monitoring module is used to monitor the air flow in the fermentation process and feed back to the controller, which can control the dissolved oxygen of the fermenter; The tank pressure monitoring module is used to collect the pressure value in the fermentation tank and feed it back to the controller, and the tank pressure monitoring module can control the pressure value in the fermentation tank; if the pressure value meets the fermentation requirements, the controller will not give instructions; if If the pressure value does not meet the fermentation requirements, the controller controls the tank pressure monitoring module to change the pressure value in the fermentation tank. 3. A strain fermentation control system according to claim 2, characterized in that: the temperature monitoring module includes a temperature probe, a hot water tank, a cold water tank, an electric heating rod and two temperature-controlled water pumps, and the electric heating rod It is located in the hot water tank and is used for heating to generate hot water; the two ends of one temperature-controlled water pump are respectively connected with the hot water tank and the fermentation tank, and the two ends of the other temperature-controlled water pump are respectively connected with the cold water tank and the fermentation tank; the temperature The probe extends into the fermenter to collect the temperature data in the fermenter. The temperature data is sent to the controller through RS485 bus communication. temperature. 4. A kind of strain fermentation control system according to claim 2, is characterized in that: described pH monitoring module comprises pH probe, lye tank, acid tank, acid-adding peristaltic pump and alkali-adding peristaltic pump, wherein adding The two ends of the alkali peristaltic pump are respectively connected with the lye tank and the fermenter, and the two ends of the acid peristaltic pump are respectively connected with the acid tank and the fermenter, and the pH probe is inserted into the fermenter to collect the pH in the fermenter. The pH value is sent to the controller through the RS485 bus communication, and the controller controls the start and stop of the peristaltic pump for adding acid and alkali according to the received pH value so as to control the pH value in the fermenter. 5. A strain fermentation control system according to claim 2, characterized in that: the dissolved oxygen monitoring module includes a dissolved oxygen signal transmitter and a dissolved oxygen probe, and the dissolved oxygen probe detects the signal Send to the dissolved oxygen signal transmitter, the dissolved oxygen signal transmitter converts the signal sent by the dissolved oxygen probe into the actual dissolved oxygen value that can be read, and the dissolved oxygen signal transmitter sends the dissolved oxygen value to the controller through RS485 bus communication The controller sends control instructions to the air flow monitoring module and the stirring speed monitoring module according to the dissolved oxygen value to control the dissolved oxygen value in the fermenter. 6. A kind of strain fermentation control system according to claim 2, is characterized in that: described stirring speed monitoring module comprises frequency converter and stirring motor, and the output end of stirring motor is provided with stirring paddle, and the output end of described stirring motor The stirring paddle is located inside the fermenter, the frequency converter communicates with the controller through the RS485 bus, the frequency converter is connected to the stirring motor, and the controller sends control commands to the frequency converter to control the stirring speed of the stirring motor. 7. A strain fermentation control system according to claim 2, characterized in that: the foam monitoring module includes a foam probe, a defoaming peristaltic pump and a defoaming liquid tank, and the foam probe is inserted from the top of the fermenter In the fermenter, the two ends of the defoaming peristaltic pump are respectively connected to the fermenter and the defoaming liquid tank, and the defoaming liquid tank is filled with defoaming agent, and the controller controls the defoaming peristaltic pump according to the signal detected by the foam probe. Start and stop; when the foam probe detects excessive foam in the fermenter, the controller controls the defoaming peristaltic pump to start, and the defoaming peristaltic pump pumps the defoamer in the defoaming liquid tank into the fermenter for defoaming. 8. A kind of bacterial strain fermentation control system according to claim 2, is characterized in that: described feed control module comprises feed tank and feed peristaltic pump, and the two ends of feed peristaltic pump are respectively connected with feed tank and feed The fermenter is connected, and the controller controls the start and stop of the feeding peristaltic pump to feed the fermenter according to the fermentation requirements. 9. A strain fermentation control system according to claim 2, characterized in that: the air flow monitoring module includes an air flow meter and an air intake valve, the air intake valve is located outside the fermenter, and the air flow meter is two The terminals are respectively connected to the intake valve and the fermenter, the air flow meter communicates with the controller through the RS485 bus, and the controller controls the opening of the intake valve according to the dissolved oxygen value so as to control the flow rate of the incoming air. 10. A strain fermentation control system according to claim 2, characterized in that: the tank pressure monitoring module includes a tank pressure measurement sensor and an exhaust valve, and the detection end of the tank pressure measurement sensor extends into the fermenter , the tank pressure measurement sensor communicates with the controller through the RS485 bus, the tank pressure measurement sensor feeds back the pressure value in the fermenter to the controller, and the controller controls the opening and closing of the exhaust valve according to the pressure value to control the pressure in the fermenter pressure value.