CN112246096A - An on-line recovery process of silicone oil applied to two-phase distribution bioreactor - Google Patents
An on-line recovery process of silicone oil applied to two-phase distribution bioreactor Download PDFInfo
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Abstract
The invention discloses a silicone oil on-line recovery process applied to a two-phase distribution bioreactor, which belongs to the technical field of biology and comprises the following devices: the absorption container is arranged on one side of the reactor body and is communicated with the reactor body through a communicating pipe body; the bottom of the reactor body is respectively provided with a gas phase inlet and a liquid phase inlet and outlet, the liquid phase inlet and outlet are communicated with a communicating pipe body, and the communicating pipe body is also provided with a pump body and a flow controller; the bottom of the absorption container is provided with a magnetic field generating device. The recovery process provided by the invention has no influence on the growth of thalli in the reactor, realizes the recovery and addition of the magnetic silicone oil in the reactor for a higher number of times, reduces the loss of the magnetic silicone oil, and has higher degradation efficiency of the recovered magnetic silicone oil on DCM.
Description
Technical Field
The invention relates to an on-line recovery process applied to a two-phase distribution bioreactor, belongs to a device for treating waste gas in the field of biotechnology, and is particularly suitable for a waste gas treatment device of a two-phase distribution bioreactor taking nano magnetic silicone oil as a non-aqueous phase.
Background
In the process of industrial development, a large amount of industrial waste gas is generated, hydrophobic VOCs components often exist in the waste gas, and efficient treatment technology is urgently needed. The biological method is based on the metabolic activity of microorganisms to degrade toxic and harmful pollutants, and has obvious advantages in the aspects of environmental friendliness, operation cost, waste gas treatment capacity and the like when used for treating low-concentration waste gas. However, the traditional biological method is often difficult to achieve the ideal effect when degrading organic pollutants with poor water solubility. Biological purification of waste gas is a complex process involving mass transfer and biochemical degradation of gas, liquid and biological membranes. For hydrophobic organic pollutants widely existing in industries such as medicine, chemical engineering and the like, the removal effect of the pollutants is poor due to mass transfer limitation from gas-liquid interphase and liquid phase to biological phase in the microbial degradation process, so that the popularization and application of a biological method in the waste gas are severely restricted. According to the theory of 'similar phase and soluble phase', if a non-aqueous phase medium (NAP) is added into a reaction system (aqueous phase) to form a two-phase distribution system (TPPB), as hydrophobic organic pollutants can be quickly dissolved in NAP, the mass transfer process from gas state to NAP is obviously enhanced, and the apparent removal rate is obviously improved; organic contaminants absorbed into the NAP may also be slowly released into the aqueous phase, providing the microorganisms with a carbon source necessary for metabolic activity. Therefore, for the hydrophobic VOCs, the waste gas can be effectively purified by adopting a NAP-based two-phase distribution system for treating the hydrophobic waste gas.
The silicone oil is a non-aqueous phase medium with high stability and good biocompatibility, but has the defects of difficult recovery, easy emulsification and the like, and is difficult to be applied in a two-phase reaction system on a large scale.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide an online recovery process of two-phase distribution bioreaction based on magnetic silicone oil, which has no influence on the growth of thalli in a reactor, realizes the recovery and addition of the magnetic silicone oil in the reactor for higher times, reduces the loss amount of the magnetic silicone oil, and ensures that the recovered magnetic silicone oil has higher degradation efficiency on DCM.
The technical scheme adopted by the invention for realizing the purpose is as follows: an on-line silicone oil recovery device applied to a two-phase distribution bioreactor comprises:
the reactor body is provided with a plurality of reaction chambers,
the absorption container is arranged on one side of the reactor body and is communicated with the reactor body through a communicating pipe body;
the bottom of the reactor body is respectively provided with a gas phase inlet and a liquid phase inlet and outlet, the liquid phase inlet and outlet are communicated with a communicating pipe body, and the communicating pipe body is also provided with a pump body and a flow controller;
the bottom of the absorption container is provided with a magnetic field generating device which comprises a sucker type electromagnet arranged at the bottom of the absorption container, and the sucker type electromagnet is connected with a switch and a power supply through a circuit. According to the invention, by putting nano magnetic silicone oil into the reactor as an auxiliary agent, in the process of replacing the nutrient solution, the magnetic field generating device arranged at the bottom of the absorption container generates magnetic attraction to adsorb the nano magnetic silicone oil, so that the real-time online recovery of the magnetic silicone oil is realized, the loss amount of the magnetic silicone oil during recovery is reduced, the utilization rate and the utilization times of the magnetic silicone oil are improved, the magnetic field generating device is arranged outside the reactor body to prevent the adverse effect of the magnetic field generating device on the growth of thalli in the reactor body, and the problem of heat dissipation and mass transfer caused by heating in the reactor body due to magnetic force is avoided.
According to one embodiment of the invention, the upper part of the reactor body is sequentially provided with a gas phase outlet, a pH measuring and controlling device and a trace acid-base adding device. The length of the trace acid-base adder and a hose pipeline connected with a pump connected with the trace acid-base adder can be adjusted at will. The pH is adjusted by a trace acid-base adder, and the gas in the reactor body is conveniently and quickly discharged from the upper part of the reactor body through the arranged gas phase outlet.
According to one embodiment of the invention, the jacket layer of the reactor body is connected with the condensed water control device, and the reactor body is internally provided with a vertically arranged guide plate body. The temperature of the reactor is controlled by a condensate water control device, industrial waste gas is blown into the reactor by an air pump, an aeration head is arranged at the bottom in the reactor and is used for aeration of the industrial waste gas, the industrial waste gas is driven by liquid input fluid at a liquid phase inlet and outlet at the bottom of the reactor, the industrial waste gas flows along a diversion plate body in the upward aeration process, partial gas in the range of an ascending region of the reactor is discharged from the upper part of the reactor through a gas-liquid separation region, partial gas enters a descending region and then enters the ascending region from the bottom, stable gas circulation is formed, and internal circulation of nutrient solution, thalli and pollutants in the reactor is realized.
According to one embodiment of the present invention, the magnetic field generating device is a magnetic field generated by connecting a suction cup type electromagnet with a constant voltage direct current power supply, and the magnetic field generating mode is longitudinal. The problem of loss of magnetic silicone oil caused by incomplete adsorption of the magnetic bar when the nutrient solution is replaced conventionally can be solved by the magnetic field generating device.
According to an embodiment of the invention, the gas phase inlet is connected with the gas inlet control assembly through the pipe body, the gas inlet control assembly comprises a gas inlet base piece, one side of the gas inlet base piece is provided with a first channel which is vertically arranged and used for accessing industrial waste gas, the other side of the gas inlet base piece is vertically arranged and used for discharging industrial waste gas, a ventilation column cavity with a horizontal axis is arranged in the gas inlet base piece, a second channel used for communicating the ventilation column cavity with the first gas inlet channel is further arranged in the gas inlet base piece, and the fifth channel is communicated with the upper end part of the ventilation column cavity. The industrial waste gas fed into the reactor body has certain heat, the temperature of the fed industrial waste gas fluctuates under different working conditions, the continuous operation of the condensate water control device can be caused under the condition that the industrial waste gas is directly fed into the reactor body, the energy is wasted, the industrial waste gas is fed into the reactor body through the first channel, the second channel, the ventilating column cavity and the fifth channel in sequence by the arranged gas inlet control assembly, the flow path of the industrial waste gas is changed in the process that the industrial waste gas passes through the first channel and the second channel so as to slow down the flow speed of the industrial waste gas entering the second channel and the gas passing column cavity, thus being beneficial to the release of the heat in the industrial waste gas in the channels and the conduction of the heat to all parts of the control assembly, the industrial waste gas flowing through the control assembly can exchange heat by the parts of the gas inlet control assembly which absorbs more stable heat to ensure the temperature of the discharged industrial waste gas to be constant, realize adjusting and stably send into this internal industrial waste gas's of reactor temperature, industrial waste gas through the second passageway gathers in the post chamber of ventilating of great volume and realizes stabilizing the heat transfer, makes the industrial waste gas of ventilating in the post intracavity obtain improving to the exhaust gas velocity of flow in the fifth passageway under the continuous industrial waste gas bulldozes the effect of inputing in the follow-up second passageway, realizes that the exhaust gas velocity of flow promotes.
According to an embodiment of the invention, a coaxial piston piece is arranged in the cavity of the ventilation column, the piston piece is connected with a columnar telescopic column, one end of the telescopic column extends out of the air inlet base piece, the extending end of the telescopic column is connected with a hinged rod body, the telescopic column is movably connected with the air inlet base piece, the hinged rod body is connected with a rotary disc, the flow rate of industrial waste gas is reduced in the process of continuously communicating the first channel and the second channel and entering the cavity of the ventilation column, so that the later-stage exhaust speed is not facilitated, the filling amount of the industrial waste gas in the cavity of the ventilation column is limited by designing the piston piece, the piston piece is pushed to slide in the cavity of the ventilation column under the internal pressure and the subsequent continuous injected industrial waste gas thrust force along with the continuous entering of the industrial waste gas, the pressure of the industrial waste gas in the cavity of the ventilation column is kept constant, the flow rate of the industrial waste gas entering the fifth channel is effectively improved, the exhaust speed is in a faster The articulated rod body moves and then drives the telescopic column to reciprocate, so that the quantity of waste gas which can be filled in the ventilation column cavity can be actively controlled, the telescopic range of the telescopic column can be controlled through the externally arranged articulated rod body, and the air pressure in the ventilation column cavity is prevented from being too small.
According to one embodiment of the invention, the piston member and the telescopic column are coaxially provided with fourth channels which are communicated with each other, the telescopic column is further provided with a third channel which is perpendicular to the axis of the telescopic column and is communicated with the fourth channels, the fourth channel is internally provided with a second ball body which has the same diameter as the fourth channel, and the second ball body deviates from the piston member and is connected with the telescopic column through a second spring. The piston piece arranged in the ventilation column cavity can effectively ensure the pressure of the industrial waste gas in the ventilation column cavity, partial industrial waste gas is discharged into the ventilation column cavity at the rear side of the piston piece through the arranged fourth channel, so that the problem that the pressure of the industrial waste gas in the ventilation column cavity at the front part of the piston piece is too high or the pressure of the ventilation inner cavity cannot be controlled under the condition of excessive industrial waste gas is avoided, the arranged fourth channel is matched with the third channel to discharge partial waste gas into the fifth channel, and the second ball is driven by the air pressure with enough strength to apply corresponding pressure to the second spring to realize the communication between the fourth channel and the third channel, so that the pressure in the ventilation column cavity can be adjusted for the overlarge air pressure, and part of gas is reserved in the ventilation cavity at the rear side of the piston piece to form certain sliding resistance in the ventilation cavity for the piston piece so as to avoid the pressure imbalance in the cavity caused by the excessively high sliding speed of the piston piece.
According to one embodiment of the invention, a first ball body with the same diameter as the first channel is arranged in the first channel, and the first ball body deviates from the inlet direction of the first channel and is connected with the air inlet base piece at the bottom of the first channel through a first spring. The gas sent into the first channel is difficult to push the first ball body under the condition that the flow rate and the air pressure of the gas are insufficient, and the second channel is opened under the condition that the gas pushes the first ball body, so that the industrial waste gas flows into the ventilation column cavity, and sufficient pushing force is ensured to push the piston piece.
The recovery process of the silicon oil on-line recovery device applied to the two-phase distribution bioreactor comprises the following steps:
-adding sterile nutrient solution, bacterial solution and 10% of magnetic silicone oil into the reactor body, and feeding industrial waste gas into the reactor body, wherein the nutrient solution, the bacteria and the pollutants in the reactor body are internally circulated; magnetic silicone oil is used as an auxiliary agent, methylene dichloride is used as a substrate, and Methylobacterium rhodesinum H13 is used as a bacterial liquid for inoculation.
-controlling the body and the flow controller to allow the liquid to be replaced to enter the absorption container, starting the magnetic field generating device to adsorb the magnetic silicone oil, discharging the residual waste liquid out of the absorption container, adding fresh nutrient solution after the waste liquid is discharged, closing the magnetic field generating device, and controlling the body and the flow controller to allow the liquid in the absorption container to be fed into the reactor body;
-repeating the above steps. The magnetic silicone oil is nanometer magnetic silicone oil.
The device reduces the loss of magnetic silicone oil caused by incomplete adsorption of the magnetic bar when the nutrient solution is replaced conventionally. When the influence of the quantity of the magnetic silicone oil on pollutants is researched, the quantity of the magnetic silicone oil entering the absorption container can be controlled through the pump body and the flow controller, so that the quantity of the magnetic silicone oil in the reactor is controlled.
According to one embodiment of the invention, the gas flow in the reactor body is controlled at 3 L.min < -1 >, the retention time is controlled at 1.5min, the temperature is controlled at 30 ℃ through an outer water bath interlayer connected with a condensed water control device, and the pH is controlled at 7.5 through a trace acid and alkali automatic adder; preferably, in the on-line recovery two-phase system, the final concentration of the magnetic silicone oil is 10% by volume based on the total volume.
By adopting the technical scheme, compared with the prior art, the invention has the following advantages: according to the invention, by putting nano magnetic silicone oil into the reactor as an auxiliary agent, in the process of replacing the nutrient solution, the magnetic field generating device arranged at the bottom of the absorption container generates magnetic attraction to adsorb the nano magnetic silicone oil, so that the real-time online recovery of the magnetic silicone oil is realized, the loss amount of the magnetic silicone oil during recovery is reduced, the utilization rate and the utilization times of the magnetic silicone oil are improved, the magnetic field generating device is arranged outside the reactor body to prevent the adverse effect of the magnetic field generating device on the growth of thalli in the reactor body, and the problem of heat dissipation and mass transfer caused by heating in the reactor body due to magnetic force is avoided.
Drawings
FIG. 1 is a schematic diagram of an on-line recovery process for a two-phase distributed bioreactor;
FIG. 2 shows the frequency and recovery rate of the nano magnetic silicone oil;
FIG. 3 is a diagram showing the effect of different recovery times of nano-magnetic silicone oil on dichloroethane removal;
FIG. 4 is a schematic diagram of a second on-line recovery process applied to a two-phase distribution bioreactor;
FIG. 5 is an internal schematic view of the intake control assembly;
FIG. 6 is a schematic diagram of a third on-line recovery process applied to a two-phase distribution bioreactor;
FIG. 7 is a schematic view of the adjustment assembly mounted to the reactor body;
FIG. 8 is a schematic view of the adjustment assembly;
FIG. 9 is a fourth schematic view of an on-line recovery process applied to a two-phase distribution bioreactor;
FIG. 10 is a schematic view showing the internal structure of an absorption vessel;
FIG. 11 is a schematic view showing the connection of the filter base string to the splicing string.
Reference numerals: 10-a reactor body; 11-a deflector body; 12-pH measuring and controlling instrument; 13-a gas phase outlet; 14-automatic micro acid and alkali adding device; 15-gas phase inlet; 16-liquid phase inlet and outlet; 17-a flow guide arc plate; 20-condensed water control means; 30-a pump body; 31-a flow controller; 40-an absorption vessel; 41-sucker type electromagnet; 42-a switch; 43-a power supply; 44-three-way valve; 45-absorbing the bottle body; 46-a bottle base substrate; 47-liquid collecting pipe body; 48-liquid outlet pipe body; 49-a first liquid changing channel; 410-a filter column chamber; 411-a second liquid changing channel; 50-an air intake control assembly; 51-a first channel; 52-a first sphere; 53-a first spring; 54-a second channel; 55-a piston member; 56-a third channel; 57-a second spring; 58-an air intake base; 59-rotating the disc; 510-a hinged rod body; 511-telescopic column; 512-vented column chamber; 513-fifth channel; 514-second sphere; 515-a fourth channel; 60-an adjustment assembly; 61-a hydraulic cylinder; 62-a mounting substrate; 63-a sliding plate body; 64-a deformed sheet; 65-a first drive motor; 66-a first nesting block; 67-a counterweight block; 68-a second nesting block; 69-a rotating shaft; 70-a filter sleeve; 71-a first connector; 72-a filter base string; 73-winding rope connection body.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1:
an on-line silicone oil recovery device applied to a two-phase distribution bioreactor comprises:
the reactor body (10) is provided with a plurality of reaction chambers,
an absorption vessel 40, wherein the absorption vessel 40 is arranged at one side of the reactor body 10, and the absorption vessel 40 is communicated with the reactor body 10 through a communication pipe body;
the bottom of the reactor body 10 is respectively provided with a gas phase inlet 15 and a liquid phase inlet and outlet 16, the liquid phase inlet and outlet 16 is communicated with a communicating pipe body, and the communicating pipe body is also provided with a pump body 30 and a flow controller 31;
the bottom of the absorption container 40 is provided with a magnetic field generating device, the magnetic field generating device comprises a sucker type electromagnet 41 arranged at the bottom of the absorption container 40, and the sucker type electromagnet 41 is connected with a switch 42 and a power supply 43 through a circuit. According to the invention, by putting nano magnetic silicone oil into the reactor as an auxiliary agent, in the process of replacing the nutrient solution, the magnetic field generating device arranged at the bottom of the absorption container 40 generates magnetic attraction to adsorb the nano magnetic silicone oil, so that the real-time online recovery of the magnetic silicone oil is realized, the loss amount of the magnetic silicone oil during recovery is reduced, the utilization rate and the utilization frequency of the magnetic silicone oil are improved, the magnetic field generating device is arranged outside the reactor body 10 to prevent the adverse effect of the magnetic field generating device on the growth of thalli in the reactor body 10, and the problem that heat dissipation and mass transfer are needed due to the fact that the magnetic force generates heat in the reactor body 10 is avoided.
The upper part of the reactor body 10 is provided with a gas phase outlet 13, a pH measuring and controlling device 12 and a trace acid and alkali adding device 14 in sequence. The length of the micro acid and alkali adder 14 and a hose pipeline connected with a pump connected with the micro acid and alkali adder can be adjusted at will. The pH value is adjusted by a trace acid-base adder 14, and the gas phase outlet 13 is arranged to facilitate the rapid discharge of the gas in the reactor body 10 from the upper part of the reactor body 10.
The jacket layer of the reactor body 10 is connected with a condensed water control device 20, and a vertically arranged guide plate body 11 is arranged in the reactor body 10. The temperature of the operation of the reactor is controlled by the condensed water control device 20, industrial waste gas is blown into the reactor by an air pump, an aeration head is arranged at the bottom in the reactor and is used for aeration of the industrial waste gas, the industrial waste gas is driven by liquid input fluid of a liquid phase inlet and outlet 16 at the bottom of the reactor, the industrial waste gas flows along the flow guide plate body 11 in the upward aeration process, part of gas in the range of an ascending region of the reactor is discharged from the upper part of the reactor through a gas-liquid separation region, part of gas enters a descending region and then enters the ascending region from the bottom, stable gas circulation is formed, and internal circulation of nutrient solution, thalli and pollutants in the reactor is further realized.
The magnetic field generating device is a magnetic field generated by connecting a sucker type electromagnet with a constant voltage direct current power supply, and the magnetic field generating mode is longitudinal. The problem of loss of magnetic silicone oil caused by incomplete adsorption of the magnetic bar when the nutrient solution is replaced conventionally can be solved by the magnetic field generating device.
The gas phase inlet 15 is connected with the air inlet control assembly 50 through a pipe body, the air inlet control assembly 50 comprises an air inlet base part 58, one side of the air inlet base part 58 is provided with a first channel 51 which is vertically arranged and used for accessing industrial waste gas, the other side of the air inlet base part is vertically arranged and used for discharging industrial waste gas, an axial horizontal ventilation column cavity 512 is arranged in the air inlet base part 58, a second channel 54 used for communicating the ventilation column cavity 512 with the first air inlet channel 51 is further arranged in the air inlet base part 58, and the fifth channel 513 is communicated with the upper end of the ventilation column cavity 512. The industrial waste gas fed into the reactor body 10 has certain heat, the temperature of the fed industrial waste gas fluctuates under different working conditions, the continuous operation of the condensate water control device 20 is caused under the condition that the industrial waste gas is directly fed into the reactor body 10, energy is wasted, the industrial waste gas is fed into the reactor body 10 through the arranged gas inlet control assembly 50 after passing through the first channel 51, the second channel 54, the vent column cavity 512 and the fifth channel 513 in sequence, the flow path of the industrial waste gas is changed in the process that the industrial waste gas passes through the first channel 51 and the second channel 54 so as to reduce the flow speed of the industrial waste gas entering the second channel 54 and the vent column cavity 512, thus the heat in the industrial waste gas is released in the channels and is conducted to all parts of the control assembly 50, the industrial waste gas flowing through the control assembly 50 can exchange heat through the parts of the gas inlet control assembly 50 which absorb more stable heat to ensure that the temperature of the discharged industrial waste gas is constant, the temperature of the industrial waste gas which is fed into the reactor body 10 is adjusted and stabilized, the industrial waste gas passing through the second channel 54 is collected in the ventilating column cavity 512 with a large volume to realize stable heat exchange, and the flow rate of the industrial waste gas in the ventilating column cavity 512 discharged into the fifth channel 513 is improved under the pushing action of the industrial waste gas continuously input into the subsequent second channel 54, so that the flow rate of the discharged gas is improved.
The coaxial piston member 55 is arranged in the ventilating column cavity 512, the piston member 55 is connected with a columnar telescopic column 511, one end of the telescopic column 511 extends out of the air inlet base member 58 and the extending end is connected with a hinged rod body 510, the telescopic column 511 is movably connected with the air inlet base member 58, the hinged rod body 510 is connected with the rotating disc 59, the flow rate of the industrial waste gas is reduced in the process that the industrial waste gas is continuously communicated with the first channel 51 and the second channel 54 and enters the ventilating column cavity 512, the later-period exhaust speed is not facilitated, the filling amount of the industrial waste gas in the ventilating column cavity 512 is limited by designing the piston member 55, the piston member 55 is pushed to slide in the ventilating column cavity 512 along with the continuous entering of the industrial waste gas in the internal pressure and the subsequent continuous injected industrial waste gas thrust, so that the pressure of the industrial waste gas in the ventilating column cavity 512 is kept constant, the flow rate of the industrial waste gas entering the fifth channel 513, the mode that passes through handing-over body of rod 510 and rotating disc 59 outside air inlet base member 58 accessible motor drive rotating disc 59 drives articulated body of rod 510 motion and then drives flexible post 511 reciprocating motion, can initiatively control the volume that can fill with waste gas in the post chamber 512 of ventilating like this, also can control the flexible scope of flexible post 511 through the articulated body of rod 510 of peripheral hardware, prevents to ventilate the post chamber 512 internal gas pressure undersize.
The piston piece 55 and the telescopic column 511 are coaxially provided with fourth channels 515 which are communicated with each other, the telescopic column 511 is further provided with third channels 56 which are vertical to the axis of the telescopic column 511 and are communicated with the fourth channels 515, second spheres 514 which have the same diameter with the fourth channels 515 are arranged in the fourth channels 515, and the second spheres 514 deviate from the piston piece 55 and are connected with the telescopic column 511 through second springs 57. The piston member 55 disposed in the vent cylinder 512 can effectively ensure the industrial waste gas pressure in the vent cylinder 512, the fourth channel 515 is opened to discharge part of the industrial waste gas into the ventilating column cavity 512 at the rear side of the piston member 55, so that the pressure of the industrial waste gas in the ventilating column cavity 512 at the front part of the piston member 55 is prevented from being too high or the pressure of the ventilating inner cavity 512 cannot be controlled under the condition of excessive industrial waste gas feeding, the fourth channel 515 is arranged to be matched with the third channel 56 to discharge part of the waste gas into the fifth channel 513, and a sufficiently strong air pressure is required to drive the second ball 514 to exert a corresponding pressure on the second spring 57 to achieve communication between the fourth passage 51 and the third passage 56, which can serve to regulate the pressure in the vent cylinder chamber 512 for excessive air pressure, and the partial gas remaining in the ventilation cavity 512 behind the piston member 55 creates a certain sliding resistance for the piston member 55 in the ventilation cavity 512 to avoid the pressure in the cavity from being imbalanced due to too fast sliding speed.
The first channel 51 is provided with a first spherical body 52 with the same diameter, and the first spherical body 52 departs from the inlet direction of the first channel 51 and is connected with an air inlet base part 58 at the bottom of the first spherical body through a first spring 53. The gas fed into the first passage 51 is difficult to push the first ball 52 in case of insufficient flow rate and pressure, and opens the second passage 54 to flow the industrial waste gas into the vent cylinder 512 in case of reaching to push the first ball 52, ensuring enough pushing force to push the piston member 55.
Example 2:
the recovery process of the silicon oil on-line recovery device applied to the two-phase distribution bioreactor comprises the following steps:
the device is used for processing Dichloromethane (DCM), sterile nutrient solution, bacterial solution and 10% of magnetic silicone oil are added into the reactor body 10, industrial waste gas is sent into the reactor body 10, and the nutrient solution, the thallus and pollutants in the reactor body 10 are internally circulated; magnetic silicone oil is taken as an auxiliary agent, methylene dichloride is taken as a substrate, and Methylobacterium rhodesinum H13 is taken as a bacterial liquid for inoculation; the gas flow in the reactor body 10 is controlled at 3 L.min < -1 >, the retention time is controlled at 1.5min, the temperature is controlled at 30 ℃ through an outer water bath interlayer connected with a condensed water control device 20, and the pH is controlled at 7.5 through a trace acid-base automatic adder 14;
and 500mL of nutrient solution is replaced every 24h during the experiment to maintain the stable operation of the reactor, and the magnetic silicone oil is recovered and then the nutrient solution is replaced. The control body 30 and the flow controller 31 enable liquid needing to be replaced to enter the absorption container 40, the magnetic field generating device is started to adsorb magnetic silicone oil, the residual waste liquid is discharged out of the absorption container, after the waste liquid is discharged, fresh nutrient solution is added, the magnetic field generating device is closed, and the control body 30 and the flow controller 31 enable the liquid in the absorption container 40 to be sent into the reactor body;
-repeating the above steps, the magnetic silicone oil being a nano magnetic silicone oil;
a reactor body 10 with a total volume of 5L, a working volume of 4.5L, a tank inner diameter of 0.120m, a tank height of 0.425m, a draft tube inner diameter of 0.06m, a draft tube length of 0.30m, a type of an aeration head at the bottom of the reactor body 10 being micro-porous, the final concentration of magnetic silicone oil by volume being 10% by total volume;
the device reduces the loss of magnetic silicone oil caused by incomplete adsorption of the magnetic bar when the nutrient solution is replaced conventionally. When the influence of the amount of the magnetic silicone oil on the pollutants is researched, the amount of the magnetic silicone oil entering the absorption container 40 can be controlled through the pump body 30 and the flow controller 31, so that the amount of the magnetic silicone oil in the reactor can be controlled.
The invention records the recovery times of the magnetic silicone oil by collecting the times of replacing the nutrient solution every time. And recording the recovery rate of the magnetic silicone oil through the amount of the magnetic silicone oil contained in the discharged waste liquid.
The final concentration composition of the nutrient solution is as follows: na (Na)2HPO4 4.5g/L、KH2PO4 1.0g/L、(NH4)2SO4 0.5g/L、MgSO4·7H2O 0.2g/L、CaCl20.023g/L, 1mL/L, pH 7.0.0 of microelement mother liquor; wherein the concentration of the microelement mother liquor comprises: FeSO4·7H2O 1.0g/L、CuSO4·5H2O 0.02g/L、H3BO3 0.014g/L、MnSO4·4H2O 0.10g/L、ZnSO4·7H2O 0.10g/L、Na2MoO4·2H2O 0.02g/L、CoCl2·6H2O is 0.02g/L, and all solvents are deionized water.
As shown in FIG. 2, by comparing the first recovered magnetic silicone oil, it can be seen that the recovery rate of 92.5% can still be achieved compared with the first recovered nano magnetic silicone oil after 20 times of recovery and use, and it can be seen that the two-phase distribution bioreactor online recovery process not only saves time for recovering the nano magnetic silicone oil, but also reduces the loss amount when the nutrient solution is replaced.
Example 3:
performance evaluation of the different operating phases: to two reactors having the same conditions, new magnetic silicone oil (group a) and magnetic silicone oil (group B) recovered 20 times were added in a volume fraction of 10%, respectively, and the influence thereof on DCM removal performance in a two-phase bioreactor was investigated. The gas flow of the two reactors is controlled at 3 L.min < -1 >, the retention time is controlled at 1.5min, the temperature is controlled at 30 ℃ by a condensate water control device, and the pH is controlled at 7.5 by a pH measuring and controlling instrument and a trace acid-base automatic adder for controlling the pH value. The DCM concentrations and corresponding removal rates in the reactor at different stages are shown in fig. 3. In the early phase of the two-phase operation, the DCM concentration is maintained at about 1000 mg.m-3. It can be seen from fig. 3 that there is a gradual increase process of A, B in the removal rates from day 1, in which the removal rate of group a (new magnetic silicone oil) is gradually increased to about 81%, and the removal rate of group B (recovered magnetic silicone oil for 20 th time) is also increased to about 75%, which indicates that the DCM has better degradation efficiency regardless of adding new nano-magnetic silicone oil or recovering magnetic silicone oil for 20 times. After the DCM removal rate stabilized in the reactor, a two-phase concentration gradient experiment was started on day 8. As the experiment progresses, the removal rate of the A group reactor is reduced from 84% to 47%, and the removal rate of the DCM in the B group is reduced from 81% to 46% at the same time when the gas inlet concentration of the DCM in the two groups of reactors is increased from 627mg m-3 to 9031mg m-3. A. The maximum removal concentration of group B can reach 4286 mg.m-3 and 4172 mg.m-3 respectively. The results show that the removal efficiency of the group A containing the magnetic silicone oil is slightly higher than that of the group B in the whole concentration increasing process. On the other hand, when the DCM concentration in the two-phase group increased to around 9000 mg. multidot.m-3, the removal concentration in the A, B reactor decreased. Starting at day 18, the reactor concentration was adjusted back to 1000mg m-3, the reactor was operated for a period of time at the initial reactor concentration, and the steady operation of the reactor was observed, and it was found that the two groups of reactors recovered to near the original degradation performance after the high concentration was adjusted back, and the steady operation was maintained.
The results show that, because the control conditions of the A, B reactors in the two groups are consistent, when the DCM concentration is maintained at about 1000 mg.m < -3 >, the removal concentration in the two groups of two-phase reactors rises along with the DCM concentration, the removal efficiency for DCM is higher, and correspondingly, the removal efficiency in the two groups is reduced along with the increase of the intake gas concentration. The reason why the removal efficiency of the group A in the reactor is slightly higher than that of the group B is probably that a small amount of iron is dissolved out in the recovery process of the magnetic silicone oil, but as can be seen from the figure, the operation performance of the reactor can be still maintained by recovering the nano magnetic silicone oil for 20 times, which indicates that the long-term operation of the reactor can be satisfied by the nano magnetic silicone oil recovered in the online recovery process.
Example 4:
the optimization scheme of the embodiment on the basis of the embodiment 1 is as follows: the upper part and the lower part of a guide plate 11 in a reactor body 10 are respectively and correspondingly provided with a guide arc plate 17 in a semi-arc shape, the circular flow of gas and liquid in the reactor is possibly influenced by bottom aeration gas and water body with the rising bottom to damage the circular flow track, the influence of medium flowing upwards from the bottom in the reactor body on the formed circular flow track is reduced by designing the guide arc plate 17, and the guide arc plate 17 on the upper part of the guide plate 11 can intercept part of ascending gas flow to avoid the phenomenon that part of gas is excessively quickly separated from gas and liquid under the action of circular ascending flow to reduce the retention time of waste gas.
Example 5:
the optimization scheme of the embodiment on the basis of the embodiment 1 is as follows: the upper part in the reactor body 10 is provided with an adjusting component 60, the adjusting component 60 comprises a rotating shaft 69 with a horizontal axis, two ends of the rotating shaft 69 are respectively connected with the inner walls of two sides of the reactor body 10, one end of the rotating shaft 69 penetrates through the reactor body 10 and is connected with a first driving motor 65 arranged outside the reactor body 10, the first driving motor 65 drives the rotating shaft 69 to rotate, a bearing and a sealing ring are arranged at the joint of the rotating shaft 69 and the reactor body 10, the rotating shaft 69 is coaxially sleeved with a first sleeving block 66 and a second sleeving block 68, a spacing distance is arranged between the first sleeving block 66 and the second sleeving block 68, the first sleeving block 66 is arranged at the end close to the first driving motor 65, the first sleeving block 66 is fixedly connected with the rotating shaft 69, the second sleeving block 68 is movably connected with the rotating shaft 69, the second sleeving block 68 can slide relative to the rotating shaft 69, the upper end of the first sleeving block 66 is connected with the upper end of the second sleeving block 68 through a deformed thin plate 64 made of metal, and deformation sheet metal 64 middle part has set firmly the balancing weight 67, and first set of joint block 66 lower extreme and second set of joint block 68 lower extreme pass through the deformation sheet metal 64 connection of metal material, and deformation sheet metal 64 middle part has set firmly the balancing weight 67, and first driving motor 65 section coaxial coupling has the sliding plate body 63 is kept away from to pivot 69, and sliding plate body 63 locates between second set of joint block 68 and reactor body 10 inner wall, reactor body 10 is equipped with pneumatic cylinder 61 outward, and pneumatic cylinder 61 passes through mounting substrate 62 fixation on reactor body 10, and the hydraulic telescoping rod tip of pneumatic cylinder 61 is located in reactor body 10, and the hydraulic telescoping rod is equipped with the sealing washer with reactor body 10 junction, and hydraulic telescoping rod tip and sliding plate body 63 rigid coupling for promote sliding plate body 63 and slide relative pivot 69. Part of gas in the ascending area range of the reactor can be discharged from the upper part of the reactor through gas-liquid separation, and is discharged out of the reactor body 10 through the gas-phase outlet 13, the gas is actually controlled for the gas-liquid separation speed at the upper part of the reactor by arranging the adjusting component 60 at the ascending area of the reactor body 10, specifically, the rotating speed of the rotating shaft 69 is controlled by controlling the rotating speed of the first driving motor 65, and further the rotating speed of the rotating shaft 69 for driving the deformation thin plate 64 and the balancing weight 67 is controlled by controlling the deformation thin plate 64 and the balancing weight 67, so that the contact surface between the liquid at the upper part of the reactor body 10 and the air is controlled, part of the liquid can be temporarily stopped in the hollow part at the upper part of the reactor body to be contacted with the air in the rotating process of the deformation thin plate 64 and the balancing weight 67, so that the liquid level is also enlarged to be contacted with the air to improve the gas-liquid exchange, and the abnormal sound can The internal ascending speed is increased, so that the treatment efficiency of the industrial waste gas in the reactor can be quickly improved, certainly, the rotating speed of the first driving motor 65 is increased under the condition that the waste gas treatment quality needs to be ensured, the sliding plate body 63 can be pushed by the hydraulic cylinder 61 to push the second sleeving block 68 to displace in the rotating process of the deformation thin plate 64 and the balancing weight 67, so that the distance between the second sleeving block 68 and the first sleeving block 66 can be controlled, the deformation thin plate 64 correspondingly deforms in the process of changing the distance between the second sleeving block 68 and the first sleeving block 66, the distance between the deformation thin plate 64 and the rotating shaft 69 is reduced in the process of increasing the distance between the second sleeving block 68 and the first sleeving block 66, so that the medium stirring in the reactor is reduced, the influence on the circulation flow path in the reactor and the gas-liquid in the reactor is reduced, and the distance between the deformation thin plate 64 and the rotating shaft 69 is increased in the process of reducing the distances between the second sleeving block 68 and the first sleeving block 66 And further guarantee the expansion of the relative pivot 69 interval of deformation sheet metal 64 and make the ascending speed of gas-liquid in the reactor improve along with the whipping of balancing weight 67, two deformation sheet metal 64 form the rhombus structure at the whipping in-process under the effect of balancing weight 67, it can comparatively concentrate the gathering at the rhombus section to updraft, balancing weight 67 corresponds the direction promptly, be favorable to concentrating the exhaust and realize that gas-liquid separation efficiency improves, and the expansion of page steam exchange volume, and the adjusting part 60 of this application is applicable to the equipment that the large subsection exists gas-liquid exchange, for example, utilize the equipment of water body medium purified gas.
Example 6:
the optimization scheme of the embodiment on the basis of the embodiment 1 is as follows: the absorption container 40 comprises an absorption bottle body 45, one side of the absorption bottle body 45 is connected with a liquid collecting pipe body 47, the other side is connected with a liquid outlet pipe body 48, the bottom of the absorption bottle body 45 is provided with a bottle bottom base piece 46, the bottle bottom base piece 46 is internally provided with a filter column cavity 410 with parallel axes, the bottle bottom base piece 46 is internally provided with a second liquid changing channel 411, the second liquid changing channel 411 is vertically arranged in the bottle bottom base piece 46, one port of the second liquid changing channel 411 is flush with and communicated with the bottom surface of the bottle bottom base piece 46, the other port of the second liquid changing channel is communicated with the filter column cavity 410, the bottle bottom base piece 46 is also provided with a first liquid changing channel 49, the first liquid changing channel 49 is used for communicating the filter column cavity 410 with the inner cavity of the absorption bottle body 45, a three-way valve 44 is also arranged on a communicating pipe body connected with the pump body 30 and the flow controller 31, one port of the three-way valve is, the magnetic field generating device is disposed below the filter column chamber 410. In the process that the nutrient solution needs to be changed, the medium in the reactor is conveyed into the second solution changing channel 411, and the magnetic device is synchronously started, so that the nano magnetic silicone oil is adsorbed in the filter column cavity 410, the nutrient solution is conveyed into the absorption bottle body 45 through the first solution changing channel 49, the nano magnetic silicone oil is discharged through the solution outlet pipe body 48, then new nutrient solution is added, the power supply of the magnetic field generating device is simultaneously cut off, the nano magnetic silicone oil is conveyed into the absorption bottle body 45, impurities are intercepted through the filtration of the filtering sleeve 70 in the process that the nano magnetic silicone oil and the nutrient solution enter the absorption bottle body 45, and efficient separation and recycling are realized.
The filtering column cavity 410 is internally provided with a filtering sleeve 70 which is coaxial with the axis of the filtering column cavity, the port of the filtering sleeve 70 close to the second liquid changing channel 411 is arranged in an open mode, the other port of the filtering column cavity is connected with a first connecting piece 71, the connecting port is sealed, one port of the filtering column cavity 410 is flush with and communicated with the side surface of the bottle bottom base piece 46, the first connecting piece 71 is in threaded sealing connection with the through port of the filtering column cavity 410, the filtering sleeve 70 is woven by filtering base ropes 72 and flexible connecting ropes 73, the filtering base ropes 72 are arranged adjacently in parallel, the flexible connecting ropes 73 are sequentially connected with the filtering base ropes 72 in a flexible mode, and the upper flexible connecting ropes 73 and the lower flexible connecting ropes 73 are connected in a staggered mode at. By weaving the filtering sleeve 70 by the weaving method, the magnetic silicone oil can pass through the filtering sleeve 70 through the gaps between the filtering base ropes 72, the flexible rope bodies 73 are connected in a staggered manner at the gaps between the filtering base ropes 72 to reduce the gap range of the filtering base ropes 72 and filter holes, and meanwhile, the magnetic silicone oil can flow out of the filtering sleeve 70 along the gaps between the flexible rope bodies 73 which are staggered up and down, so that the problem that the magnetic silicone oil is difficult to block or adhere to parts of the filtering sleeve 70 through the filtering sleeve 70 is avoided, and meanwhile, particle impurities are effectively filtered.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.
Claims (10)
1. An on-line silicone oil recovery device applied to a two-phase distribution bioreactor comprises:
a reactor body (10),
the absorption container (40), the absorption container (40) is arranged on one side of the reactor body (10), and the absorption container (40) is communicated with the reactor body (10) through a communicating pipe body;
the bottom of the reactor body (10) is respectively provided with a gas phase inlet (15) and a liquid phase inlet and outlet (16), the liquid phase inlet and outlet (16) is communicated with a communicating pipe body, and the communicating pipe body is also provided with a pump body (30) and a flow controller (31);
the magnetic field generating device is arranged at the bottom of the absorption container (40) and comprises a sucker type electromagnet (41) arranged at the bottom of the absorption container (40), and the sucker type electromagnet (41) is connected with a switch (42) and a power supply (43) through a circuit.
2. The on-line silicone oil recovery device applied to a two-phase distribution bioreactor as claimed in claim 1, wherein: the upper part of the reactor body (10) is sequentially provided with a gas phase outlet (13), a pH measuring and controlling device (12) and a trace acid-base adder (14).
3. The on-line silicone oil recovery device applied to a two-phase distribution bioreactor as claimed in claim 1, wherein: the reactor is characterized in that a condensed water control device (20) is connected to a jacket layer of the reactor body (10), and a vertically arranged guide plate body (11) is arranged in the reactor body (10).
4. The on-line silicone oil recovery device applied to a two-phase distribution bioreactor as claimed in claim 1, wherein: the magnetic field generating device is a magnetic field generated by connecting a sucker type electromagnet with a constant voltage direct current power supply, and the magnetic field generating mode is longitudinal.
5. The on-line silicone oil recovery device applied to a two-phase distribution bioreactor as claimed in claim 1, wherein: gaseous phase entry (15) are through body coupling air intake control subassembly (50), air intake control subassembly (50) are including admitting air base member (58), admit air base member (58) one side and be equipped with vertical setting and be used for inserting industrial waste gas's first passageway (51), the vertical setting of opposite side and be used for discharging industrial waste gas's fifth passageway (513), establish axis horizontally in admitting air base member (58) and admit air in base member (58) and still offer in base member (58) and be used for communicating the second passageway (54) of column chamber (512) and first inlet channel (51) of ventilating, fifth passageway (513) and the upper end intercommunication of column chamber (512) of ventilating.
6. The on-line silicone oil recovery device applied to a two-phase distribution bioreactor as claimed in claim 5, wherein: the ventilation column cavity (512) is internally provided with a coaxial piston piece (55), the piston piece (55) is connected with a columnar telescopic column (511), one end of the telescopic column (511) extends out of the air inlet base piece (58) and the extending end is connected with a hinged rod body (510), the telescopic column (511) is movably connected with the air inlet base piece (58), and the hinged rod body (510) is connected with the rotating disc (59).
7. The on-line silicone oil recovery device applied to a two-phase distribution bioreactor as claimed in claim 6, wherein: the piston piece (55) and the telescopic column (511) are coaxially provided with fourth channels (515) which are communicated with each other, the telescopic column (511) is further provided with third channels (56) which are perpendicular to the axis of the telescopic column (511) and communicated with the fourth channels (515), and a second sphere (514) with the same diameter as the fourth channels (511) is arranged in the fourth channels (515), and the second sphere (514) deviates from the piston piece (55) and is connected with the telescopic column (511) through a second spring (57).
8. The on-line silicone oil recovery device applied to a two-phase distribution bioreactor as claimed in claim 5, wherein: a first ball body (52) with the same diameter as the first channel (51) is arranged in the first channel (51), and the first ball body (52) is connected with an air inlet base piece (58) at the bottom of the first channel (51) through a first spring (53) in a direction departing from the inlet direction of the first channel (51).
9. The recovery process of the silicon oil on-line recovery device applied to the two-phase distribution bioreactor, which is disclosed by any one of claims 1 to 8, comprises the following steps:
-adding sterile nutrient solution, bacterial solution and 10% of magnetic silicone oil into the reactor body (10), feeding industrial waste gas into the reactor body (10), and internally circulating the nutrient solution, the bacteria and the pollutants in the reactor body (10);
-controlling the body (30) and the flow controller (31) to allow the liquid to be replaced to enter the absorption container (40), starting the magnetic field generating device to adsorb the magnetic silicone oil, discharging the residual waste liquid out of the absorption container, adding fresh nutrient solution after the waste liquid is discharged, closing the magnetic field generating device, and controlling the body (30) and the flow controller (31) to allow the liquid in the absorption container (40) to be fed into the reactor body;
-repeating the above steps.
10. The recovery process of the silicon oil on-line recovery device applied to the two-phase distribution bioreactor as claimed in claim 9, which is characterized in that: the gas flow in the reactor body (10) is controlled to be 3 L.min < -1 >, the retention time is controlled to be 1.5min, the temperature is controlled to be 30 ℃ through an outer water bath interlayer connected with the condensed water control device (20), and the pH is controlled to be 7.5 through the automatic micro acid and alkali adder (14); preferably, in the on-line recovery two-phase system, the final volume concentration of the magnetic silicone oil is 10% based on the total volume.
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