CN101639690B - System and method for controlling reaction of alga - Google Patents
System and method for controlling reaction of alga Download PDFInfo
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- CN101639690B CN101639690B CN2009101506043A CN200910150604A CN101639690B CN 101639690 B CN101639690 B CN 101639690B CN 2009101506043 A CN2009101506043 A CN 2009101506043A CN 200910150604 A CN200910150604 A CN 200910150604A CN 101639690 B CN101639690 B CN 101639690B
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Abstract
The invention discloses a system and a method for controlling reaction of alga. By adopting a layering gathering-scattering type control structure, a master controller performs unified configuration of the environmental parameter for growth of alga required by a plurality of sub-controllers in the system and transmits the environmental parameter of the alga to the sub-controller corresponding to a reactor for cultivating the alga; and the sub-controller monitors the environment of the reactor according to the received environmental parameter to ensure that the environmental parameter of the reactor is in a state suitable for growth of the alga. Accordingly, a great amount of alga cultivating sub-controllers are monitored to make the large-scale industrial production possible.
Description
Technical field
The present invention relates to the algae culture technology, relate in particular to a kind of algae RCS and method.
Background technology
Photosynthetic microorganism or vegetable cell; Especially the growth and breeding of little algae and cyanobacteria (being called for short algae) utilizes luminous energy (like sunshine and artificial light) that water and carbon dioxide are changed into high value organic compounds such as pigment, protein, fatty acid, carbohydrate and secondary metabolites mainly through photosynthesis.Algae is owing to have high light utilization ratio and nutritional utilization efficient, thereby shows the growth potential stronger than higher plant.
The culture apparatus of algae mainly can be divided into open cell system and sealing/semiclosed reactor assembly.Open cell system causes overall productivity lower owing to have the control of shortage temperature, optical length and mix problems such as inhomogeneous, and easy microbiological contamination, often causes cultivating failure.Sealing/semiclosed reactor assembly be owing to can improve overall productivity for culture (algae) provides suitable growth conditions greatly, thereby also becomes the emphasis of research and development.
Algae culture reactor (being Photoreactor) key for design is to comprise suitable pH value, temperature, dissolved oxygen concentration, nutrient concentrations, stir speed (S.S.) and air feed speed etc. for culture (algae) provides suitable growing environment.And to the automatic detection and the control of these parameters, develop control accurately, react fast that Process Control System has crucial meaning to improving reactor performance and improving culture output.
Adopt in the existing algae RCS by a supervisory control comuter, a controller and the structure that reactor is formed; Supervisory control comuter communicates with controller through optical fiber etc.; Write the parameter of the current needs of reaction solution in the reactor to controller; Reaction solution state in the reactor is adjusted according to parameter by control, made the algae in the reaction solution be in best growing environment.
Existing algae RCS can only be cultivated a certain amount of algae, is difficult to cultivate a large amount of algae simultaneously, is not easy to the large-scale industrial production of algae culture.
Summary of the invention
The embodiment of the invention provides a kind of algae RCS and method, has realized the large-scale industrial production to algae culture.
A kind of algae RCS, said system comprises: master controller and many group RACSs, every group of RACS comprises a reactor and a sub-controller that is used for cultivation of algae, wherein:
Said master controller; The relevant information of the algae that is used for cultivating according to each reactor of preserving in advance; Confirm at least one required environmental parameter of algal grown; The value range that each environmental parameter is corresponding, and the value range that the environmental parameter of algae is corresponding sends to the sub-controller of the reactor place RACS of cultivating this algae;
Sub-controller; Being used in the environmental parameter that receives is reaction solution oxygen dissolved and reaction solution potential of hydrogen; During the higher limit of the corresponding scope of reaction solution oxygen dissolved that the reaction solution oxygen dissolved in the reactor that obtains after the detection sends greater than master controller; Mixed gas to reactor bubbling air and carbon dioxide; And during the higher limit of the corresponding scope of reaction solution potential of hydrogen of sending greater than master controller of the reaction solution potential of hydrogen in the reactor that after detection, obtains; Raising is concentration of carbon dioxide in the mixed gas of air that reactor feeds and carbon dioxide; During the lower limit of the corresponding scope of reaction solution potential of hydrogen that the reaction solution potential of hydrogen in the reactor that after detection, obtains is sent less than master controller; Reduction is concentration of carbon dioxide in the mixed gas of air that reactor feeds and carbon dioxide, and the oxygen dissolved of reaction solution that makes reactor is in the corresponding value range of reaction solution oxygen dissolved that master controller sends, and the reaction solution potential of hydrogen of reactor is in the value range of the reaction solution potential of hydrogen correspondence that master controller sends.
A kind of algae reaction control method said method comprising the steps of:
Master controller is according to the relevant information of the algae of cultivating in each reactor of preserving in advance; Confirm at least one required environmental parameter of algal grown; The value range that each environmental parameter is corresponding, and the value range that the environmental parameter of algae is corresponding sends to the corresponding sub-controller of reactor of cultivating this algae;
Said sub-controller is reaction solution oxygen dissolved and reaction solution potential of hydrogen in the environmental parameter that receives; During the higher limit of the corresponding scope of reaction solution oxygen dissolved that the reaction solution oxygen dissolved in the reactor that after detection, obtains sends greater than master controller; Through AIR Proportional valve and/or carbon dioxide proportioning valve mixed gas to reactor bubbling air and carbon dioxide; And during the higher limit of the corresponding scope of reaction solution potential of hydrogen of sending greater than master controller of the reaction solution potential of hydrogen in the reactor that after detection, obtains; Sub-controller improves through AIR Proportional valve and carbon dioxide proportioning valve concentration of carbon dioxide in the mixed gas of reactor bubbling air and carbon dioxide; During the lower limit of the corresponding scope of reaction solution potential of hydrogen that the reaction solution potential of hydrogen in the reactor that after detection, obtains is sent less than master controller; Sub-controller reduces through AIR Proportional valve and carbon dioxide proportioning valve concentration of carbon dioxide in the mixed gas of reactor bubbling air and carbon dioxide; The reaction solution oxygen dissolved that makes reactor is in the value range of the reaction solution oxygen dissolved correspondence that master controller sends, and the reaction solution potential of hydrogen of reactor is in the corresponding value range of the reaction solution potential of hydrogen that master controller sends.
Because the present invention adopts layering collecting and distributing type control structure; The environmental parameter of unifying the algal grown of a plurality of sub-controller needs in the configuration-system by master controller; And the environmental parameter of algae sent to the corresponding sub-controller of reactor of cultivating this algae; Sub-controller is monitored the environment of reactor according to the environmental parameter that receives, and guarantees that the environmental parameter of reactor is in the state that is fit to algal grown, therefore; Realized simultaneously making large-scale industrial production become possibility to the monitoring of a large amount of algae culture subsystems.
Description of drawings
Fig. 1 is the structural representation of algae RCS in the embodiment of the invention one;
Fig. 2 is the structural representation of monitoring temperature in the embodiment of the invention two;
Fig. 3 is the structural representation of potential of hydrogen and oxygen dissolved monitoring in the embodiment of the invention three;
Fig. 4 is an algae reaction control method step synoptic diagram in the embodiment of the invention six.
Embodiment
The embodiment of the invention proposes a kind of algae RCS that can be applicable to large-scale industrial production, realize computing machine automatically monitoring the reaction environment of the reactor of a large amount of cultivation of algae is monitored and is adjusted, to satisfy the needs that industrialization is produced down.
Below in conjunction with Figure of description the embodiment of the invention is described in detail.
Embodiment one:
As shown in Figure 1; Structural representation for algae RCS in the embodiment of the invention one; Algae RCS in the present embodiment adopts layering collecting and distributing type control structure; Comprise a master controller 11 and many group RACSs 12, wherein, comprise a sub-controller 13 and a reactor 14 in every group of RACS 12.The course of work of each parts is following in the system:
Also comprise various sensors and actuator in the algae RCS in the present embodiment one.Master controller 11 can be other central control equipments such as computing machine; Its function is real-time and each controller communicates; The running parameter of controller is set, and the working condition of each parts of system is monitored, when alarm appears sending when unusual in the parts of system.Simultaneously, master controller 11 can also receive the correlation parameter information that sub-controller reports.
Adopt (the ControllerArea Network of controller local area network between master controller 11 in the system and the sub-controller 13; CAN) fieldbus communicates; Send environmental parameter through this CAN to sub-controller 13; Simultaneously, receive and export the environmental parameter that sub-controller returns, the said environmental parameter of returning is the reactor detection acquisition of sub-controller to same RACS.The mode of master controller 11 output environment parameters includes but not limited to: screen display, printing demonstration etc., the environmental parameter of output includes but not limited to: diagrammatic form, written form etc.
CAN belongs to the category of industrial field bus; Be distributed control of a kind of effective support and the serial communication network of controlling in real time; Its advantage is that data transmission has good real-time performance, reliability and dirigibility, and wiring is simple, convenient construction; The number of nodes that can hang control module simultaneously on the bus is many, is easy to expansion.In the native system traffic rate 250kb/s can be set, maximum communication distance is 270 meters between any two nodes under this speed in the bus, can satisfy the needs that industrialization is produced.
In master controller 11, preserved the relevant information of the algae in each reactor 14; Like the title of algae, characteristic etc.; And combine the condition of current reality, like needing etc. of the temperature of production site and product, confirm at least one required when every kind of algae produces environmental parameter in reactor.Because when cultivation of algae; Even there are also cultivation of algae preferably of smaller error in actual growing environment of algae and desirable growing environment; Therefore, after the embodiment of the invention can be confirmed the ideal value of each environmental parameter, for each environmental parameter is provided with a value range that comprises ideal value; The upper limit of this value range is the maximal value of available environmental parameter, and lower limit is the minimum value of available environmental parameter.
When the corresponding value range of the environmental parameter of confirming changes, the environmental parameter after can confirming to upgrade through the mode that administrator hand correction or computing machine are revised automatically, and the corresponding value range of the environmental parameter after will upgrading sends to sub-controller 13.
Through the algae RCS that the embodiment of the invention one provides, can realize the large-scale industrial production of algae culture, realized full-automatic on-line monitoring, improved work efficiency greatly.
The environmental parameter of confirming to master controller 11 is different, and the course of work of the sub-controller 13 in the system is also different, below to the different environment parameter, the course of work of sub-controller 13 is described respectively.
Embodiment two:
The embodiment of the invention two is that an environmental parameter with in the environmental parameter that receives is that the reaction solution temperature is an example, the monitoring of algae environment in 13 pairs of reactors 14 of pine torch controller.As shown in Figure 2; Be in one group of RACS 12; Interworking between sub-controller 13, reactor 14 and various sensor, the actuator, the structural representation of completion monitoring temperature supposes that the sub-controller 13 that relates to is the equipment that belongs in the same RACS 12 with reactor 14.
Describe in the face of the reaction solution temperature controlled processes down:
Because algae all has the growth temperature an of the best; The optimum growth temp of different algal species possibly there are differences; Therefore; Master controller 11 will be confirmed each self-corresponding ideal response solution temperature and the corresponding value range of reaction solution temperature according to different algae, and the value range of reaction solution temperature correspondence is sent to the sub-controller 13 in the corresponding RACS, can also send the ideal response solution temperature simultaneously.
If the reaction solution temperature that detection obtains in the reactor is in the corresponding value range of the reaction solution temperature that receives, promptly the reaction solution temperature is fit to algal grown in the reactor 14, then needn't adjust the temperature of reaction solution in the reactor 14; Otherwise
Reaction solution is too high or too low for temperature in the expression reactor 14; Be not suitable for algal grown; Then adjust the temperature of the reaction solution in the reactor 14; The reaction solution temperature that makes reactor 14 is in the corresponding value range of the reaction solution temperature that master controller 11 sends, and more excellently, the reaction solution temperature that makes reactor 14 is as much as possible near the ideal response solution temperature.
Particularly, present embodiment two adopts the wetting shade in greenhouse fan apparatus to reduce space temperatures, and then reduces reactor internal reaction solution temperature, and through the logical hot water of plate type heat exchanger in the greenhouse raise space temperature and then rising reactor internal reaction solution temperature.Concrete adjustment process is following:
The wetting shade in greenhouse fan apparatus utilizes the water evaporative cooling to realize the cooling purpose; When cold water drenches wet curtain wall equably; Dry to wet curtain wall through one group of fan; Reduce the temperature in the space by the clammy air of taking out of, and then reduce reactor internal reaction solution temperature, make the reaction solution temperature of reactor 14 be reduced in the corresponding value range of reaction solution temperature that master controller 11 sends.
If the reaction solution temperature in the reactor that obtains 14 gets lower limit less than the corresponding value range of reaction solution temperature that master controller 11 sends; Then sub-controller 13 is through the logical hot water of plate type heat exchanger in the greenhouse; To improve the reaction solution temperature in the reactor 14, the reaction solution temperature of reactor 14 is increased in the corresponding value range of reaction solution temperature that master controller 11 sends.
Plate type heat exchanger is a kind of new type high efficient heat exchanger that is formed by a series of sheet metal closed assemblies with certain bellows-shaped.Form the thin rectangular shape passage between the various plates, carry out exchange heat when flow of hot water is out-of-date with outside air, to reach the purpose of intensification.
The cold water that relates in the present embodiment two is meant the liquid of temperature less than the higher limit of the corresponding value range of reaction solution temperature of master controller 11 transmissions, and hot water is meant the liquid of temperature greater than the lower limit of the corresponding value range of reaction solution temperature of master controller 11 transmissions.
In present embodiment two, temperature control is accurate more in order to make, response speed is faster, can adopt two closed loop string utmost points controls to realize the regulation and control to temperature.As shown in Figure 2; When sub-controller 13 utilizes the reaction solution temperature in wetting shade in greenhouse fan apparatus or the plate type heat exchanger conditioned reaction device 14; Continuation is measured the reaction solution temperature in the reactor 14 through temperature sensor, the degree that adjustment heats up or lowers the temperature according to feedback result.For example, can set first threshold value, this first threshold value is greater than the higher limit of the corresponding value range of reaction solution temperature.The higher limit that is higher than the corresponding value range of reaction solution temperature of master controller 11 transmissions when the reaction solution temperature of reactor 14; And difference is during greater than first threshold value; The reaction solution temperature of expression reactor 14 and the temperature difference of suitable algal grown are bigger; Need rapid adjustment, then increase the work efficiency of wetting shade in greenhouse fan apparatus, carry out fast cooling; The higher limit that is higher than the corresponding value range of reaction solution temperature of master controller 11 transmissions when the reaction solution temperature of reactor 14; And difference is during less than first threshold value, and the reaction solution temperature of expression reactor 14 need accurately be adjusted near suitable temperature; Avoid the temperature in the reactor sharply to fall lowly excessively; Then reduce the work efficiency of wetting shade in greenhouse fan apparatus, accurately lower the temperature, guarantee temperature controlled accuracy.
The process that heats up and the process of above-mentioned cooling are similar.
In the system of the embodiment of the invention two; The sub-controller 13 of master controller 11 in each RACS 12 sent the corresponding value range of reaction solution temperature; Then the reaction solution temperature of 13 pairs of reactors 14 of each sub-controller is adjusted; Reaction solution temperature in the reactor 14 is remained in the corresponding value range, guarantee that the algae of cultivating has suitable growing environment.Simultaneously, adopt the control of the closed loop string utmost point, make the response speed of temperature adjustment faster, temperature control is more accurate.
Embodiment three:
The embodiment of the invention three is to be that reaction solution potential of hydrogen and reaction solution oxygen dissolved are example with an environmental parameter in the environmental parameter that receives, the monitoring of algae environment in 13 pairs of reactors 14 of pine torch controller.As shown in Figure 3; Be in one group of RACS 12; Interworking between sub-controller 13, reactor 14 and various sensor, the actuator; Accomplish the structural representation of potential of hydrogen and oxygen dissolved monitoring, suppose that the sub-controller 13 that relates to is the equipment that belongs in the same RACS 12 with reactor 14.
PH value of nutrient solution (being potential of hydrogen) and dissolved oxygen concentration (oxygen dissolved) are one of key factors that influences algal grown; Regulate the pH value through in reactor 14, feeding acid and alkali substance, make the potential of hydrogen of the reaction solution in the reactor 14 meet the demand of algae culture.In addition; Because photosynthesis constantly produces oxygen; Oxygen in the reaction solution is easy to reach hypersaturated state, and the too high algal grown that can suppress of oxygen concentration can make air contact continual renovation with the interface of reaction solution through feeding gas to reactor 14; Dissolved oxygen more than saturation concentration is escaped in the air, reduce dissolved oxygen concentration.
If the reaction solution potential of hydrogen in the reactor 14 that obtains after detecting is in the value range of the reaction solution potential of hydrogen correspondence that master controller 11 sends, then the reaction solutions in the reactor 14 meet the condition of algae culture, need not adjust potential of hydrogen;
Otherwise, need in reactor 14, feed acidity or alkaline matter, with the potential of hydrogen of the reaction solution in the adjustment reactor, the reaction solution potential of hydrogen that makes reactor 14 is in the corresponding value range of the reaction solution potential of hydrogen that master controller 11 sends.
In addition; Sub-controller 13 is also measured the oxygen dissolved of the reaction solution in the reactor 14 through dissolved oxygen detecting sensor (like dissolved oxygen electrode); And the corresponding value range of reaction solution oxygen dissolved that measurement result and master controller 11 sent compares, and according to comparative result following two kinds of possible situation arranged:
If the reaction solution oxygen dissolved in the reactor 14 that obtains after detecting is in the value range of the reaction solution oxygen dissolved correspondence that master controller 11 sends, then the reaction solutions in the reactor 14 meet the condition of algae culture, need not feed gas adjustment oxygen dissolved;
If the reaction solution oxygen dissolved in the reactor 14 that obtains after detecting then need feed gas greater than the higher limit of the corresponding value range of reaction solution oxygen dissolved of master controller 11 transmissions in reactor 14, to reduce the oxygen dissolved of the reaction solution in the reactor.The gas that feeds can be the mixed gas of air or air and carbon dioxide.
In the present embodiment; Reaction solution potential of hydrogen and reaction solution oxygen dissolved are adjusted the environment of reaction solution in the reactor as environmental parameter simultaneously, and present embodiment only also is not limited to the reaction solution potential of hydrogen or only the reaction solution oxygen dissolved is adjusted the environment of reaction solution in the reactor as environmental parameter.
When the reaction solution potential of hydrogen of adjustment in the reactor 14, the concrete processing mode excessive or too small to the pH value of reaction solution is:
If the reaction solution potential of hydrogen in the reactor 14 that obtains after detecting is greater than the higher limit of the corresponding value range of reaction solution potential of hydrogen of master controller 11 transmissions; Then during the mixed gas of sub-controller 13 bubbling air and carbon dioxide in reactor 14; Increase the gas concentration lwevel that feeds; The acidity of mixed gas is strengthened, reduce the pH value of the reaction solution of reactor 14, in the corresponding value range of the reaction solution potential of hydrogen of sending at master controller 11.The embodiment of the invention also is not limited to feed other acidic materials.
Owing to can reduce the reaction solution oxygen dissolved in the reactor 14 in the time of the mixed gas of bubbling air and carbon dioxide, therefore, can carry out simultaneously with the detection of reaction solution oxygen dissolved to the detection of reaction solution potential of hydrogen.Particularly, can adjust the pH value and the oxygen dissolved of reactor 14 according to close-loop feedback structure shown in Figure 3 simultaneously, way is following:
If the reactor 14 that feeds is mixed gass of air and carbon dioxide; Then sub-controller 13 is measured through pH electrode pair feeding mixed gas post-reactor 14 internal reaction solution acid alkalinities; In real time the corresponding value range of reaction solution potential of hydrogen with master controller 11 transmissions compares, and when comparative result is the higher limit greater than the value range of correspondence, and difference is during greater than second threshold value; Expression reactor 14 internal reaction solution acid alkalinities and suitable potential of hydrogen difference are bigger; Need rapid adjustment, then, drive big AIR Proportional valve and carbon dioxide proportioning valve (also can only drive big carbon dioxide proportioning valve here) through the flow information of flowmeter feedback; After making more sour gas get into the mixed gas jar, feed reactor 14 by the aeration proportioning valve.When comparative result is the higher limit greater than the value range of correspondence; And difference is during less than second threshold value; Expression reactor 14 internal reaction solution acid alkalinities are less with suitable potential of hydrogen difference, need accurately to adjust, and then turn down AIR Proportional valve and carbon dioxide proportioning valve (also can only turn down the carbon dioxide proportioning valve here); Make the sour gas that feeds reactor 14 in the unit interval less, the reaction solution potential of hydrogen that guarantees reactor 14 is as far as possible near the ideal response solution acid alkalinity.
The all right conditioned reaction solution oxygen dissolved of close-loop feedback structure shown in Figure 3; Measure the reaction solution oxygen dissolved of adjusted reactor 14 through dissolved oxygen electrode by reactor 13; If the oxygen dissolved that obtains is then driven big AIR Proportional valve and carbon dioxide proportioning valve, simultaneously greater than the higher limit of the corresponding value range of reaction solution oxygen dissolved of master controller 11 transmissions; Consider and feed the influence of mixed gas potential of hydrogen; Can under the unregulated situation of carbon dioxide proportioning valve, only drive big AIR Proportional valve, then can the reaction solution potential of hydrogen of reactor 14 not impacted.If the oxygen dissolved that obtains is greater than the higher limit of the corresponding value range of reaction solution oxygen dissolved of master controller 11 transmissions; And difference then turns down AIR Proportional valve and carbon dioxide proportioning valve, simultaneously less than the 3rd threshold value; Consider and feed the influence of mixed gas potential of hydrogen; Can under the unregulated situation of carbon dioxide proportioning valve, only turn down the AIR Proportional valve, then can the reaction solution potential of hydrogen of reactor 14 not impacted.
If the reaction solution potential of hydrogen in the reactor 14 that obtains after detecting is less than the higher limit of the corresponding value range of reaction solution potential of hydrogen of master controller 11 transmissions; Then during the mixed gas of sub-controller 13 bubbling air and carbon dioxide in reactor 14; Reduce the gas concentration lwevel that feeds; The acidity of mixed gas is weakened, and the pH value of the reaction solution of augmenting response device 14 is in the corresponding value range of the reaction solution potential of hydrogen of sending at master controller 11.
At this moment, in order when adjusting the reaction solution oxygen dissolved, to avoid the influence to potential of hydrogen, sub-controller 13 can only open big or to turn down the AIR Proportional valve, do not adjust the carbon dioxide proportioning valve.
Present embodiment three is regulated aeration through control air and carbon dioxide electricity/gas proportioning valve; Realization is to the pH value in each subsystem 12 and the control of dissolved oxygen concentration; Simultaneously, to feeding the adjustment of mixed gas, reaction solution potential of hydrogen, the reaction solution oxygen dissolved of adjusted reactor 14 are regulated the speed soon through closed-loop control system; And adjustment accurately is in proper state preferably.
Consider that algae utilizes the carbon dioxide in the reaction solution to carry out photosynthesis in necessary for growth, the carbon dioxide that feeds in the embodiment of the invention three is regulated except the potential of hydrogen to reaction solution, can also be as the raw material of algae photosynthesis.If make the suitable algae grows of potential of hydrogen of reaction solution through the mixed gas that feeds carbon dioxide and oxygen to reaction solution, then the carbon dioxide of feeding this moment is enough to supply with the photosynthesis of algae.When consuming carbon dioxide a large amount of in the reaction solution in the algal grown process; The potential of hydrogen of reaction solution is higher than the higher limit of the corresponding value range of reaction solution potential of hydrogen of master controller 11 transmissions possibly; Then the scheme according to the embodiment of the invention three will feed carbon dioxide in large quantities in reactor, guarantee also to have guaranteed the demand of the photosynthesis of algae to carbon dioxide under the suitable situation of potential of hydrogen.
Embodiment four:
The embodiment of the invention four is to be that algae concentration is example in reaction solution liquid level and the reaction solution with an environmental parameter in the environmental parameter that receives, the monitoring of algae environment in 13 pairs of reactors 14 of pine torch controller.
In the arbitrary group of RACS 12 in the present embodiment four; Interworking between sub-controller 13, reactor 14 and various sensor, the actuator; Accomplish the structural representation of algae concentration measurement and control in reaction solution liquid level and the reaction solution, suppose that the sub-controller 13 that relates to is the equipment that belongs in the same RACS 12 with reactor 14.
Sub-controller in the environmental parameter of confirming to receive is in reaction solution liquid level and the reaction solution after the algae concentration; Through concentration detection sensor algae concentration in the reaction solution in the reactor is detected; And testing result compared with the corresponding value range of reaction solution liquid level that receives, obtain following two kinds of comparative results:
If when algae concentration was in the corresponding value range of the algae concentration that master controller sends in the reaction solution of the reactor that obtains after detecting, algae also need continue to cultivate in the expression reactor, can not collect.
If algae concentration is higher than the lower limit of the corresponding value range of algae concentration of master controller transmission in the reaction solution of the reactor that obtains after detecting, algae needs to collect in the expression reactor, then gets rid of the interior reaction solution that comprises algae of reactor.After getting rid of algae liquid; Because liquid level reduces; And when being reduced to the lower limit of the corresponding value range of reaction solution liquid level; Need in reactor, add reaction solution, make algae concentration in the reaction solution of reactor be lower than the lower limit of the corresponding value range of algae concentration that master controller sends, and the reaction solution liquid level of reactor be in the corresponding value range of the reaction solution liquid level that master controller sends.
In the closed loop feedback system of embodiment four, need select suitable eliminating flow and add flow according to each stage of adjustment.Specific practice is following:
Behind the sub-controller exclusive segment algae liquid; Utilize concentration detection sensor that algae concentration in the reaction solution in the reactor is detected in real time; Also added reaction solution owing to get rid of algae liquid, then in the reactor in the reaction solution algae concentration reduce to a certain extent, when being lower than the lower limit of the corresponding value range of algae concentration that master controller sends; Expression need not regather algae, and should continue to cultivate.
Embodiment five:
The embodiment of the invention five is to be that illuminance is an example with an environmental parameter in the environmental parameter that receives, the monitoring of algae environment in 13 pairs of reactors 14 of pine torch controller.
Sub-controller is when confirming to regulate and control illuminance; Can detect the illumination around the reactor through illuminometer (digital illuminance sensor); And the value range that testing result is corresponding with the illuminance that receives compares, and following two kinds of comparative results are arranged:
If the illuminance around the reactor that obtains after detecting representes that the illuminance around the current reactor satisfies the algal grown demand in the corresponding value range of the illuminance that master controller sends, need not carry out the illuminance adjustment.
If the illuminance around the reactor that obtains after detecting not in the corresponding value range of the illuminance that master controller sends, then need be adjusted the illuminance around the reactor, the illuminance that makes reactor is in the corresponding value range of the illuminance that master controller sends.
Particularly, when the illuminance around the needs adjustment reactor, the mode of adjustment is following:
Sub-controller detects the back through illuminometer and confirms: during the higher limit of the corresponding value range of illuminance that the illuminance around the reactor is sent greater than master controller; Then can block reactor illumination on every side through utilizing shelter, the illuminance that makes reactor is in the corresponding value range of the illuminance that master controller sends.During the lower limit of the corresponding value range of illuminance that the illuminance around the reactor is sent less than master controller, can remove the shelter that is used to block the reactor ambient lighting.
The shelter that relates in the present embodiment can be electronic window-blind, when the needs shading, moves window-blind to assigned address, and the mechanical limit switch state changes when putting in place, the stall of control motor.When needs daylighting, the control motor retracts original position to window-blind again.
In some cases illuminance too a little less than, can through the long led light source of standing wave to the reactor light filling.
The embodiment of the invention two to embodiment five is to be that example is explained algae reaction control procedure with a kind of environmental parameter respectively; The embodiment of the invention also is not limited to the environmental parameter that embodiment two to embodiment five relates to is combined, and algae reaction control procedure is handled according to a plurality of environmental parameters by sub-controller is parallel.
Embodiment six:
Belong under the same inventive concept with embodiment one, the embodiment of the invention six also provides a kind of algae reaction control method, and is as shown in Figure 4, said method comprising the steps of:
Step 101: master controller is confirmed at least one required environmental parameter of algal grown according to the relevant information of the algae of cultivating in each reactor of preserving in advance, the value range that each environmental parameter is corresponding.
Step 102: the value range that master controller is corresponding with the environmental parameter of algae sends to the corresponding sub-controller of reactor of cultivating this algae.
Said master controller sends environmental parameter through CAN to sub-controller, and receives and export the environmental parameter that sub-controller returns, and the said environmental parameter of returning is the reactor detection acquisition of sub-controller to same RACS.
In the present embodiment, have a plurality of reactors that are used for cultivation of algae, the algae of cultivating in each reactor maybe identical also possibility difference.A reactor and a sub-controller are bound, and sub-controller can be monitored the algal grown whether interior environment of corresponding reactor is fit to cultivation.
Step 103: sub-controller detects according to the environment of the environmental parameter that receives to the reactor of correspondence; Whether the environmental parameter that obtains after judge detecting is in the corresponding value range of the same environmental parameter that master controller sends; If currently need not adjust to the environment of reactor in expression; Otherwise, jump to step 104.
Step 104: the environment in this reactor of sub-controller adjustment makes the environmental parameter of adjusted reactor in the corresponding value range of the same environmental parameter that master controller sends.
According to the method for above step 101 to step 104, can realize the industrialization of algae culture, greatly improved production efficiency.
To the difference that receives environmental parameter, in the step 104 environment in the reactor is adjusted also difference, explain respectively below:
When 1, an environmental parameter in the environmental parameter that receives was the reaction solution temperature, step 104 comprised:
On the corresponding value range of reaction solution temperature that reaction solution temperature in the reactor that after detection, obtains is sent greater than master controller in limited time; Sub-controller is through starting the wetting shade in greenhouse fan apparatus; Reduce space temperature, the reaction solution temperature that makes reactor is in the corresponding value range of the reaction solution temperature that master controller sends;
Reaction solution temperature in the reactor that after detection, obtains is prescribed a time limit less than the following of the corresponding scope of reaction solution temperature that master controller sends; Sub-controller is through the logical hot water of plate type heat exchanger in the greenhouse; The reaction solution temperature that makes reactor is in the corresponding value range of the reaction solution temperature that master controller sends, and the temperature of said hot water is greater than the lower limit of the corresponding scope of reaction solution temperature of master controller transmission.
When 2, an environmental parameter in the environmental parameter that receives was the reaction solution potential of hydrogen, step 104 comprised:
During the higher limit of the corresponding scope of reaction solution potential of hydrogen that the reaction solution potential of hydrogen in the reactor that after detection, obtains is sent greater than master controller; Sub-controller is through AIR Proportional valve and the carbon dioxide proportioning valve mixed gas to reactor bubbling air and carbon dioxide; Improve concentration of carbon dioxide in the mixed gas, the reaction solution potential of hydrogen that makes reactor is in the corresponding value range of the reaction solution potential of hydrogen that master controller sends;
During the lower limit of the corresponding scope of reaction solution potential of hydrogen that the reaction solution potential of hydrogen in the reactor that after detection, obtains is sent less than master controller; Sub-controller reduces concentration of carbon dioxide in the mixed gas, and the reaction solution potential of hydrogen that makes reactor is in the corresponding value range of the reaction solution potential of hydrogen that master controller sends.
When 3, an environmental parameter in the environmental parameter that receives was the reaction solution oxygen dissolved, step 104 comprised:
During the higher limit of the corresponding scope of reaction solution oxygen dissolved that the reaction solution oxygen dissolved in the reactor that after detection, obtains sends greater than master controller; Through AIR Proportional valve and/or the carbon dioxide proportioning valve mixed gas to reactor bubbling air or air and carbon dioxide, the reaction solution oxygen dissolved that makes reactor is in the corresponding value range of reaction solution oxygen dissolved that master controller sends.
4, an environmental parameter in the environmental parameter that receives is in reaction solution liquid level and the reaction solution during algae concentration, and step 104 comprises:
When algae concentration is higher than the lower limit of the corresponding value range of algae concentration that master controller sends in the reaction solution of the reactor that obtains after the detection; Expression needs to collect algae; Sub-controller is got rid of the reaction solution that comprises algae in the reactor; And after the reaction solution that comprises algae is got rid of, in reactor, add reaction solution again, the reaction solution liquid level that makes reactor is in the corresponding value range of the reaction solution liquid level that master controller sends.
When 5, an environmental parameter in the environmental parameter that receives was illuminance, step 104 comprised:
During the higher limit of the corresponding value range of illuminance that the illuminance around the reactor that after detection, obtains is sent greater than master controller; Sub-controller utilizes shelter to block reactor illumination on every side, makes reactor illuminance on every side in the corresponding value range of the illuminance that master controller sends;
During the lower limit of the corresponding value range of illuminance that the illuminance around the reactor that after detection, obtains is sent less than master controller; Sub-controller is removed and is used to block the shelter of reactor ambient lighting or utilizes the long led light source of standing wave to the reactor light filling, makes reactor illuminance on every side in the corresponding value range of the illuminance that master controller sends.
Above-mentioned 5 kinds of environmental parameters also can combine, and in all directions the environment in the reactor are adjusted according to aforesaid way.
The system and method that provides through the embodiment of the invention; Adopted the collecting and distributing control system structure; Undertaken alternately by master controller CAN field bus communication and a large amount of sub-controllers; Realized simultaneously a large amount of algae culture subsystems being monitored, made the suitability for industrialized production of algae culture become possibility, improved production efficiency; Simultaneously; The present invention realizes monitoring automatically to various physics and the chemical parameters that influences algae culture, comprises parameters such as pH value, dissolved oxygen concentration, temperature, illuminance, reactor liquid level, aeration speed, aeration atmospheric carbon dioxide concentration, makes when the algae large-scale industrialized production; Realize the optimization control of culture environment; Improve culture output, and energy savings, reduce cost.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. an algae RCS is characterized in that, said system comprises: master controller and many group RACSs, and every group of RACS comprises a reactor and a sub-controller that is used for cultivation of algae, wherein:
Said master controller; The relevant information of the algae that is used for cultivating according to each reactor of preserving in advance; Confirm at least one required environmental parameter of algal grown; The value range that each environmental parameter is corresponding, and the value range that the environmental parameter of algae is corresponding sends to the sub-controller of the reactor place RACS of cultivating this algae;
Sub-controller; Being used in the environmental parameter that receives is reaction solution oxygen dissolved and reaction solution potential of hydrogen; During the higher limit of the corresponding scope of reaction solution oxygen dissolved that the reaction solution oxygen dissolved in the reactor that obtains after the detection sends greater than master controller; Mixed gas to reactor bubbling air and carbon dioxide
And during the higher limit of the corresponding scope of reaction solution potential of hydrogen of sending greater than master controller of the reaction solution potential of hydrogen in the reactor that after detection, obtains; Raising is concentration of carbon dioxide in the mixed gas of air that reactor feeds and carbon dioxide; During the lower limit of the corresponding scope of reaction solution potential of hydrogen that the reaction solution potential of hydrogen in the reactor that after detection, obtains is sent less than master controller; Reduction is concentration of carbon dioxide in the mixed gas of air that reactor feeds and carbon dioxide; The oxygen dissolved of reaction solution that makes reactor is in the corresponding value range of reaction solution oxygen dissolved that master controller sends, and the reaction solution potential of hydrogen of reactor is in the corresponding value range of the reaction solution potential of hydrogen that master controller sends.
2. the system of claim 1 is characterized in that,
Said master controller sends environmental parameter through the CAN of controller local area network to sub-controller, and receives and export the environmental parameter that sub-controller returns, and the said environmental parameter of returning is the reactor detection acquisition of sub-controller to same RACS.
3. the system of claim 1 is characterized in that,
Said sub-controller; An environmental parameter that is used in the environmental parameter that receives is the reaction solution temperature; And the reaction solution temperature in the reactor that obtains after detecting is not in the corresponding value range of the reaction solution temperature that master controller sends the time; The temperature of the reaction solution in the adjustment reactor, the reaction solution temperature that makes reactor is in the corresponding value range of the reaction solution temperature that master controller sends.
4. system as claimed in claim 3 is characterized in that,
Said sub-controller; On the corresponding value range of reaction solution temperature that reaction solution temperature in the reactor that also is used for after detection, obtaining is sent greater than master controller in limited time; Start the wetting shade in greenhouse fan apparatus, the reaction solution temperature that makes reactor is in the corresponding value range of the reaction solution temperature that master controller sends;
Reaction solution temperature in the reactor that after detection, obtains is prescribed a time limit less than the following of the corresponding scope of reaction solution temperature that master controller sends; Through the logical hot water of plate type heat exchanger in the greenhouse; The reaction solution temperature that makes reactor is in the corresponding value range of the reaction solution temperature that master controller sends, and said hot water is meant the liquid of temperature greater than the lower limit of the corresponding value range of reaction solution temperature of master controller transmission.
5. the system of claim 1 is characterized in that,
Said sub-controller; An environmental parameter that is used in the environmental parameter that receives is an algae concentration in reaction solution liquid level and the reaction solution; And when algae concentration is higher than the lower limit of the corresponding value range of algae concentration that master controller sends in the reaction solution of the reactor that obtains after detecting; Get rid of the reaction solution that comprises algae in the reactor; And after the reaction solution that comprises algae is got rid of, in reactor, add reaction solution again, the reaction solution liquid level that makes reactor is in the corresponding value range of the reaction solution liquid level that master controller sends.
6. like claim 1,3 or 5 arbitrary described systems, it is characterized in that,
Said sub-controller; An environmental parameter that also is used in the environmental parameter that receives is an illuminance; And the illuminance around the reactor that obtains after detecting is not in the corresponding value range of the illuminance that master controller sends the time; Illuminance around the adjustment reactor, the illuminance that makes reactor is in the corresponding value range of the illuminance that master controller sends.
7. system as claimed in claim 6 is characterized in that,
Said sub-controller; During the higher limit of the corresponding value range of illuminance that the illuminance around the reactor that also is used for after detection, obtaining is sent greater than master controller; Block reactor illumination on every side, the illuminance that makes reactor is in the corresponding value range of the illuminance that master controller sends;
During the lower limit of the corresponding value range of illuminance that the illuminance around the reactor that after detection, obtains is sent less than master controller; Removal is used to block the shelter of reactor ambient lighting or utilizes the long led light source of standing wave to the reactor light filling, makes reactor illuminance on every side in the corresponding value range of the illuminance that master controller sends.
8. an algae reaction control method is characterized in that, said method comprising the steps of:
Master controller is according to the relevant information of the algae of cultivating in each reactor of preserving in advance; Confirm at least one required environmental parameter of algal grown; The value range that each environmental parameter is corresponding, and the value range that the environmental parameter of algae is corresponding sends to the corresponding sub-controller of reactor of cultivating this algae;
Said sub-controller is reaction solution oxygen dissolved and reaction solution potential of hydrogen in the environmental parameter that receives; During the higher limit of the corresponding scope of reaction solution oxygen dissolved that the reaction solution oxygen dissolved in the reactor that after detection, obtains sends greater than master controller; Through AIR Proportional valve and/or carbon dioxide proportioning valve mixed gas to reactor bubbling air and carbon dioxide; And during the higher limit of the corresponding scope of reaction solution potential of hydrogen of sending greater than master controller of the reaction solution potential of hydrogen in the reactor that after detection, obtains; Sub-controller improves through AIR Proportional valve and carbon dioxide proportioning valve concentration of carbon dioxide in the mixed gas of reactor bubbling air and carbon dioxide; During the lower limit of the corresponding scope of reaction solution potential of hydrogen that the reaction solution potential of hydrogen in the reactor that after detection, obtains is sent less than master controller; Sub-controller reduces through AIR Proportional valve and carbon dioxide proportioning valve concentration of carbon dioxide in the mixed gas of reactor bubbling air and carbon dioxide; The reaction solution oxygen dissolved that makes reactor is in the value range of the reaction solution oxygen dissolved correspondence that master controller sends, and the reaction solution potential of hydrogen of reactor is in the corresponding value range of the reaction solution potential of hydrogen that master controller sends.
9. method as claimed in claim 8 is characterized in that,
Said master controller sends environmental parameter through CAN to sub-controller, and receives and export the environmental parameter that sub-controller returns, and the said environmental parameter of returning is the reactor detection acquisition of sub-controller to same RACS.
10. method as claimed in claim 8 is characterized in that, when an environmental parameter in the environmental parameter that receives was the reaction solution temperature, the environment in this reactor of sub-controller adjustment comprised:
On the corresponding value range of reaction solution temperature that reaction solution temperature in the reactor that after detection, obtains is sent greater than master controller in limited time; Sub-controller is through starting the wetting shade in greenhouse fan apparatus, and the reaction solution temperature that makes reactor is in the corresponding value range of the reaction solution temperature that master controller sends;
Reaction solution temperature in the reactor that after detection, obtains is prescribed a time limit less than the following of the corresponding scope of reaction solution temperature that master controller sends; Sub-controller is through the logical hot water of plate type heat exchanger in the greenhouse; The reaction solution temperature that makes reactor is in the corresponding value range of the reaction solution temperature that master controller sends, and the temperature of said hot water is greater than the lower limit of the corresponding scope of reaction solution temperature of master controller transmission.
11. method as claimed in claim 8 is characterized in that, an environmental parameter in the environmental parameter that receives is in reaction solution liquid level and the reaction solution during algae concentration, and the environment in this reactor of sub-controller adjustment comprises:
When algae concentration is higher than the lower limit of the corresponding value range of algae concentration that master controller sends in the reaction solution of the reactor that obtains after the detection; Sub-controller is got rid of the reaction solution that comprises algae in the reactor; And after the reaction solution that comprises algae is got rid of; In reactor, add reaction solution again, the reaction solution liquid level that makes reactor is in the corresponding value range of the reaction solution liquid level that master controller sends.
12., it is characterized in that when an environmental parameter in the environmental parameter that receives was illuminance, the environment in this reactor of sub-controller adjustment comprised like the arbitrary described method of claim 8～11:
During the higher limit of the corresponding value range of illuminance that the illuminance around the reactor that after detection, obtains is sent greater than master controller; Sub-controller utilizes shelter to block reactor illumination on every side, makes reactor illuminance on every side in the corresponding value range of the illuminance that master controller sends;
During the lower limit of the corresponding value range of illuminance that the illuminance around the reactor that after detection, obtains is sent less than master controller; Sub-controller is removed and is used to block the shelter of reactor ambient lighting or utilizes the long led light source of standing wave to the reactor light filling, makes reactor illuminance on every side in the corresponding value range of the illuminance that master controller sends.
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| CN102843834B (en) * | 2012-08-23 | 2015-04-08 | 杭州朗拓生物科技有限公司 | Intelligent lighting system for parental breeding bird cultivation and lighting control method |
| CN102843833B (en) * | 2012-08-23 | 2015-04-08 | 杭州朗拓生物科技有限公司 | Intelligent illumination system for layer culturing and illumination control method |
| CN103031249B (en) * | 2012-12-10 | 2014-07-02 | 北京农业智能装备技术研究中心 | Parameter monitoring and controlling system for biological microalgae reaction vessel |
| CN106244447A (en) * | 2016-07-29 | 2016-12-21 | 车团结 | A kind of Polymerized human serum albumin and temperature control system thereof |
| CN106650853A (en) * | 2016-12-30 | 2017-05-10 | 深圳前海弘稼科技有限公司 | Planting parameter setting method and setting device and terminal |
| CN108062136A (en) * | 2018-01-18 | 2018-05-22 | 深圳市兰德玛水环境工程科技有限公司 | A kind of intelligence control method and system of environmental element |
| TWI786711B (en) * | 2021-07-07 | 2022-12-11 | 台灣電力股份有限公司 | Intelligent microalgae cultivation system and method thereof |
| CN113673118B (en) * | 2021-09-07 | 2024-02-13 | 中国水利水电科学研究院 | Method for predicting pH value of lake water body |
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