CN106399045A - Portable low-energy-consumption air-floatation apparatus used for harvesting of microalgae and application method thereof - Google Patents
Portable low-energy-consumption air-floatation apparatus used for harvesting of microalgae and application method thereof Download PDFInfo
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Abstract
The invention relates to a portable low-energy-consumption air-floatation apparatus used for harvesting of microalgae. The apparatus comprises a base, a drum and a top cover, wherein a microbubble generator and a water outlet pipe are fixed on the base; the microbubble generator is composed of an electrode pair, a negative electrode is located at a lower position and is of a plate shape, a positive electrode is located at an upper position and is of a comb, grid or net shape, graphite is used for making the electrode pair, and a DC source is used for supplying power to the electrode pair; and a water inlet and a residue outlet are mounted in the top cover, the water inlet is slightly lower than the water outlet, the residue outlet is slightly higher than the water outlet, and a pipeline mixer is arranged at the upper part of the water outlet. The apparatus provided by the invention uses the corrosion-resistant lossless electrode pair located at the bottom for electrolysis of water so as to produce microbubbles, and granular substances in liquid are harvested or removed through the adhesion and buoyancy lift of the microbubbles, so harvesting efficiency or removal efficiency is improved, energy consumption is reduced and process is simplified; and the apparatus has the characteristics of convenience in moving and easiness in carrying. The apparatus is especially applicable to harvesting of microalgae mass cultured in a desert, an offshore environment or other environments.
Description
Technical field
The present invention relates to a kind of air-floating apparatus and its using method, specifically, the present invention relates to one kind is for micro-
The portable low energy consumption air-floating apparatus of algae harvesting and its using method.
Background technology
Microalgae has fast growth, the features such as nutrient substance enriches, is widely used in biological feed, guarantor
The fields such as health food, food additive.Particularly in recent years, increasingly deficient with the conventional petrochemical energy, entirely
Ball environmental problem increasingly serious, the recyclable organism fuel with oil-rich microalgae as raw material be considered as alleviate the energy
Crisis, the optimum selection of reduction environmental nuisance.But because microalgae cell individuality is little, the concentration in culture fluid is low,
Result in it and there is a problem of that difficulty is larger, relatively costly in harvesting.According to statistics, in large-scale cultivation,
The harvesting cost of microalgae can reach the 30% about of cultivation totle drilling cost.At present, the collecting method of microalgae mainly have from
Heart method, Filtration, flocculence and Bubble-floating Method etc..Centrifuging has energy consumption and puts into high deficiency, and filter rule is past
Filter membrane is led to lose efficacy because frustule blocks filter opening toward meeting.Flocculence is usually used in combination with Bubble-floating Method, to reach
High efficiency, the continuous harvesting of low cost.
Bubble-floating Method is that one kind makes algae floccule body stick thereon thus reaching by importing micro-bubble in algae solution
Buoyance lift collects the technology of purpose.In the recovery process of microalgae, Bubble-floating Method often as the subsequent step of flocculence,
The seriality making scale recovery process is become feasible by both be used in combination.How stably to produce abundant and
Small bubble is the key point that the method obtains higher harvest efficiency.At present, the generating mode master of microbubble
Mechanical Method to be had and air soluble method.The microbubble particle diameter that the former is formed is larger, is difficult to stick with algae floccule body.Phase
To for, the latter then can form the less bubble of particle diameter, be relatively applied to algae floccule body enrichment harvesting.Although such as
This, dissolved air flotation yet suffer from energy consumption put into height, complex process, microbubble generation be difficult to continual and steady not
Foot.
The Chinese patent of Application No. 201310719153.7 discloses a kind of microalgae Foam concentration recovering device, should
Device includes bubble holding unit, concentrating and separating tower, liquor stream cycling element and foam collector unit, gas warp
Gas distributor sticks to microalgae cell surface after breaing up, and brings it into liquid surface and forms froth bed, this foam
Layer inputs foam collector unit by foam mozzle, obtains and concentrate algae solution after froth breaking.However, this device relates to
And unit more, structure is relative complex, and floor space is larger, and portability is not good, equipment investment with run into
This is all of a relatively high, and produced by gas distributor, bubble diameter is larger, leads to air flotation effect to be subject to very big
Restriction.
The Chinese patent of Application No. 201420310778.8 discloses a kind of electrolysis air flotation post, and this device leads to
Cross, in flotation column bottom, one group of circular ring electrode is installed, rely on the bubble of electrolysis water generation and coordinate add to rise
Infusion, reaches the purpose of ore flotation material.This adopts vertical circular ring electrode group, its bubble produced by electrolysis
Can rise along electrode wooden partition, lead to bubble to disperse in system uneven, and bubble is rising along electrode wooden partition
During can constantly be gathered into the larger bubble of particle diameter, thus reducing daf efficiency.On the other hand, this device
It is applied to preparation equipment technical field.
Content of the invention
For above-mentioned the deficiencies in the prior art, need that a kind of structure of exploitation is simple, portability is good at present badly,
The microalgae recovery device that energy consumption is relatively low and efficiency is higher, to meet micro-algae large-scale culture (especially desert, sea
Under first-class environment micro-algae large-scale culture) harvesting link.The present invention is intended to provide a kind of new portable mental retardation
Consumption air-floating apparatus, can meet the seriality harvesting of microalgae, ensure that higher and stable harvest efficiency.
For achieving the above object, the present invention takes following technical scheme：
A kind of portable low energy consumption air-floating apparatus for microalgae recovery it is characterised in that：This device by base,
Cylinder and upper lid three part composition, described three is partly detachable, is easy to move and carries.
On described base, microbubble generator is fixed with by fixed column, this microbubble generator is by a pair of electrodes group
Constitute, wherein, negative electrode is placed below, is tabular, anode is placed in top, is pectination or palisade or netted.Institute
State and between negative electrode and anode, be equipped with felt pad.Described electrode group material is preferably graphite.Described electrode group material
But rustless steel, all kinds of alloy, titanium and its oxide, tantalum and its oxide etc..Described electrode group is by unidirectional current
Source powers.
Described base side is provided with opening, is connected with outlet and evacuated tube by threeway, and this water outlet height can
Adjust, have the function of controlling liquid level in air-floating apparatus concurrently, at this evacuated tube, be provided with valve.
Described cylinder lower end is connected with base, and upper end is connect with top cap, and its material is transparent glass or organic glass
The hard materials such as glass, the soft material such as alternatively transparent plastics.When cylinder uses soft material, cylinder week
Enclose and be equipped with netted enclosing.
It is provided with adjustable for height water inlet, upper lid side is provided with slag notch, wherein, water inlet is slightly in described upper lid
Less than outlet, slag notch is slightly above outlet.Described outlet is horadiam, and it is little that liquid passes through feed liquor
Mouth is flowed in cylinder with horizontal direction.
Described water inlet top is pipe-line mixer, in order to abundant mix containing flocculant treat air supporting liquid.
Described portable low energy consumption air-floating apparatus are securable on basal plane or hang on support.
When described portable low energy consumption air-floating apparatus are used for the harvesting of microalgae, harvest every kilogram of microalgae (dry weight)
Only need to consume 0.043～0.075kWh electric energy.
The invention provides a kind of portable low energy consumption air-floating apparatus for microalgae recovery, microalgae can be met
Seriality harvests, and ensures that higher and stable harvest efficiency, efficiently solves technical problem as described below：
1. traditional microalgae recovery mode has the deficiency that equipment cost is high, operating cost is high, and patent of the present invention carries
For air-floating apparatus there is the advantage that material price is cheap, operating cost is extremely low, significantly reduce microalgae recovery mistake
The material of journey and energy consumption put into, and have saved cost.
2. traditional microalgae recovery equipment has the deficiency that structure is lengthy and tedious, complex process, equipment are huge, not only grasps
Process of making is loaded down with trivial details, and floor space is big, and portability is not good, seriously limits its practicality.Patent of the present invention
The air-floating apparatus providing have that structure is simple, concise in technology, the advantage of compact, be easy to mobile it is easy to take
Band, flexibly can be widely used in microalgae various types of pilot scale culture pattern, be particularly suited for desert,
The harvesting of micro-algae large-scale culture under the environment such as sea.
3. traditional aerating collecting equipment is difficult to long lasting for stable because of the generation of bubble, and produced bubble
Particle diameter is larger, leads to aerating collecting inefficiency, and the air-floating apparatus that patent of the present invention provides are former based on electrolysis water
Reason, can stably produce the less bubble of a large amount of particle diameters, especially for the floating load of microalgae, effectively increase and adopt
Produce effects rate；Inventor is found by research, collects granule, produced Air Bubble Size again by Bubble-floating Method
Difference, the floating load effect of its targeted different size granule is significantly different, patent application 201420310778.8
Described device uses air pocket adhesion short grained bubble load pattern, and the application is this big for microalgae
Grain, the bubble load pattern of air pocket is extremely low for the collection efficiency of microalgae, and is changed to minute bubbles, more can effectively glue
Attached microalgae bulky grain, improves the recovery ratio of microalgae.
4. traditional electrofloatation device using materials such as the metallic iron being easily corroded, aluminum as electrolysis electrode,
It is also easy to produce metallic salt in electrolytic process and mix in cutting, the severe contamination quality of cutting, therefore not
It is suitable to the harvesting of microalgae, and, the consumption one side of electrode can increase lossy cost, on the other hand also makes
Electrode is gradually passivated, and leads to electric conductivity to reduce, air flotation effect is deteriorated.Inventor, in experimentation, replaces
The electrode of multiple material is combined testing, find the materials such as metallic iron, aluminum as electrolysis electrode in economy
With electrolysis performance on hence it is evident that less than graphite, stainless steel alloy, titanium and its oxide, tantalum and its oxide etc. several
Plant electrode material, and comparatively, graphite electrode be more particularly suitable, its corrosion resistance is high, not only cheap,
And completely avoid the problems such as above-mentioned pollution, loss and passivation.
5. the air-floating apparatus principle that patent of the present invention provides is simple and clear, rational in infrastructure, is especially mounted to use on base
In the electrode group producing microbubble, due in electrolytic process, bubbles volume produced by negative electrode far more than anode,
So cathode design is placed below for tabular, by anode design for pectination or palisade or netted be placed in top, this
Sample both can avoid the inhomogeneities of bubble distribution, can guarantee that bubble will not be detained and be gathered into larger bubble again.
It is electrolysed using unidirectional current rather than alternating current, even more for more stable generation microbubble, it is to avoid disturbance, from
And continuous-stable carry out microalgae recovery；In addition, under the conditions of preferred electrode spacing and decomposition voltage, this dress
Put and significantly reduce the energy consumption input harvesting unit mass microalgae.
6. the air-floating apparatus that patent of the present invention provides, the pipe-line mixer positioned at water inlet upper end can play stirring
With the effect mixing, make to treat that air supporting liquid is sufficiently flocculated containing flocculant.This design avoid with
Conventional stirring equipment such as stirring motor subsidiary toward in aerating collecting device, mix the use in pond, make air-floating apparatus
Be configured to simplify, increase its portability, also effectively reduce stirring energy consumption simultaneously.Additionally, the application
Set by the relative position of outlet, water inlet, slag notch, thus by regulating and controlling the level change in cylinder,
Can achieve that microalgae is overflowed by slag notch and is collected, thus decreasing prior art airfloat equipment middle scraper
The setting of (for the microalgae floating up to the page is scraped collection), the construction of further compact device, improves gas
The portability of floating device.
7. the air-floating apparatus that patent of the present invention provides have horadiam outlet, and liquid passes through feed liquor osculum
Flowed in cylinder with horizontal direction, this design is uniformly distributed when can flow liquid in cylinder in the horizontal direction,
Simultaneously also by effective disturbance reducing and causing when liquid flows in cylinder.
8. the air-floating apparatus that patent of the present invention provides adopt hard and/or soft material, be securable on basal plane and/
Or hang on support, to adapt to various types of Large-scale microalgae training modes.
The beneficial effect of patent of the present invention：
1. patent of the present invention provides air-floating apparatus simple structure, compact, it is easy to safeguard it is easy to mobile
And carry, flexibly can be widely used in microalgae various types of pilot scale culture pattern, be particularly suited for
The harvesting of micro-algae large-scale culture under the environment such as desert, sea.
2. the air-floating apparatus material that patent of the present invention provides is cheap, and operating cost is low, and microalgae recovery can be greatly reduced
The material of process and energy consumption put into, cost-effective, under the conditions of preferred electrode spacing and decomposition voltage, harvest
Every kilogram of microalgae (dry weight) only needs to consume 0.043～0.075kWh electric energy.
3. the air-floating apparatus that patent of the present invention provides produce microbubble based on the principle of electrolysis water, in preferably electricity
Under the conditions of pole material and electrode composition form, sustainable stably obtain the minimum bubble of a large amount of particle diameters, effectively
Improve harvest efficiency, under the conditions of preferred decomposition voltage and flow rate of liquid etc., harvest efficiency may be up to
91%～99%.
4. the air-floating apparatus that patent of the present invention provides, the aspect such as the material of its electrode, construction, installation all designs
Rationally, the pipe-line mixer of its water inlet upper end avoids extra mixing plant, reduces energy consumption, its level
Radial outlet is relatively beneficial to maintain the stablizing of air supporting state in cylinder, its hard and/or soft cylinder
Material is securable on basal plane and/or hangs on support, is more suitable for various types of Large-scale microalgae culture moulds
Formula.
Brief description：
Fig. 1 is the structural representation of this air-floating apparatus.
Fig. 2 is the electrode group structure schematic diagram of this air-floating apparatus.
Fig. 3 is the harvest efficiency figure that this air-floating apparatus is used for the discontinuous harvesting of microalgae.
Fig. 4 is the harvest efficiency figure that this air-floating apparatus is used for the continuous harvesting of microalgae.
Fig. 5 is bubble size distribution figure produced by this air-floating apparatus.
In Fig. 1：1st, anode；2nd, negative electrode；3rd, felt pad；4th, fixed column；5th, DC source；6th, bottom
Seat；7th, evacuated tube；8th, cylinder；9th, netted enclosing；10th, pipe-line mixer；11st, outlet；12、
Water inlet；13rd, Shang Gai；14th, slag notch.
Specific embodiment
The present invention is further illustrated in conjunction with the embodiments it should explanation, and the description below is merely to solve
Release the present invention, its content is not defined.
Embodiment 1：Air-floating apparatus specific embodiment
As depicted in figs. 1 and 2, a kind of portable low energy consumption air-floating apparatus, its ingredient include base (6),
Cylinder (8) and upper lid (13), three is detachable；Described base diameter is 5～30cm, and described base passes through
Fixed column (4) is connected with a pair of electrodes group, and described electrode group includes negative electrode (2) placed below and is placed in
The anode (1) of side, is equipped with felt pad (3), described electrode group is by DC source (5) between described negative electrode and anode
Power supply；Described base side is provided with opening, is connected with outlet (11) and evacuated tube (7) by threeway；
Described cylinder is transparent material, and its lower end is connected with base, and its upper end and top cap connect；When cylinder is soft
During bright material, it is equipped with netted enclosing (9) about；Described barrel diameter is 5～30cm, a height of 50～200cm；
A diameter of 5～the 30cm of described upper lid, described upper lid side is provided with slag notch (14), and centre is provided with water inlet (12),
Described water inlet top is pipe-line mixer (10).
In described electrode group, negative electrode is circular or square tabular, and anode is circular or square pectination and/or grid
Shape and/or netted, negative electrode and anode spacing are 0.5～10mm.Described electrode group material is graphite and/or not
Rust steel and/or all kinds of alloy and/or titanium and its oxide and/or tantalum and its oxide.
Described cylinder is cylinder and/or prism, and described cylinder is hard transparent material and/or soft transparent material
Material.
Described water inlet is horadiam, and liquid passes through feed liquor osculum and flows in cylinder with horizontal direction, water inlet
Mouth is less than outlet, and slag notch is higher than outlet, is provided with valve, water inlet and water outlet height can at evacuated tube
Up-down adjustment.
Described portable low energy consumption air-floating apparatus are used for the application of microalgae recovery, are securable on basal plane or outstanding
It is hung on support.
Before air supporting starts, first pass through evacuated tube and fill liquid toward in cylinder, close the valve in evacuated tube afterwards
Door, connects and opens DC source, now starts electrolysis and produces microbubble.Treat that in cylinder, microbubble quantity becomes
When liquid is visually changed into approximate milky in quite abundant i.e. cylinder, starts to be passed through algae solution and carry out air supporting and adopt
Receive.Described algae solution is that stream has added the algae solution of flocculant by a certain percentage in advance.Described stream by a certain percentage has added wadding
The algae solution of solidifying agent is fully mixed when flowing through the pipe-line mixer of water inlet upper end and is stirred, and reaches preferably
Flocculating effect.The feed liquor osculum that algae solution through flocculation passes through horadiam flows in cylinder with horizontal direction, wadding
Solidifying body is contacted with microbubble, sticks, and moves to liquid-covered under the effect of its buoyance lift.And remove wadding through air supporting
The liquid of solidifying body then moves down, and flows out eventually through outlet.When the floccule body layer of liquid surface gradually becomes
When thick, flow out from the slag notch positioned at upper lid side.Contain bubble due in floccule body layer, its density is low
In algae solution, so slag notch is slightly above outlet, meanwhile, for avoid from water inlet flow into liquid to shape already
The flocbed becoming produces disturbance, and water inlet is set below outlet.After treating that air supporting terminates, open evacuated tube
Valve, by emptying rate of liquid in cylinder.
Embodiment 2：Air-floating apparatus are used for the discontinuous harvesting of microalgae
The chlorella algae solution that Biomass is about 1.2g/L is flocculated with the shitosan of final concentration of 25mg/L,
This algae solution is added in air-floating apparatus and carries out discrete aerating collecting.In recovery process, setting decomposition voltage is
3～6V, timing sampling mensuration absorbance value calculates harvest efficiency.Result shows, final under each voltage conditions
Up to 91%～99% harvest efficiency all can be obtained, up to more than 50 times of cycles of concentration, obtain optimal harvesting effect
The time of rate shortens (as Fig. 3) with the increase of voltage, but from the point of view of energy consumption angle, when voltage is set to 4V
When, the energy consumption harvesting needed for every kilogram of microalgae (dry weight) is minimum, only 0.043kWh.The present inventor is to pass
The dissolved air flotation of system and mechanical air flotation method carry out discrete aerating collecting as comparison to identical algae solution, knot
Fruit shows, the highest harvest efficiency that dissolved air flotation can reach is 60%, and mechanical air flotation rule only has 40%,
From the point of view of energy consumption angle, the energy consumption that dissolved air flotation harvests needed for every kilogram of microalgae (dry weight) is 2.2kWh,
Mechanical air flotation rule is 3.4kWh, and both is respectively 51.2 times and 79.1 times of apparatus of the present invention.Thus
It can be seen that, this air-floating apparatus significantly reduces the harvesting energy consumption of microalgae.
Embodiment 3：Air-floating apparatus are used for the continuous harvesting of microalgae
According to the specific embodiment described in embodiment 1, Biomass is about the chlorella algae solution of 1.2g/L
It is continually fed in air-floating apparatus and is continuously harvested, this algae solution flows in advance and added shitosan as flocculant, makes shell
Final concentration of 25mg/L in algae solution for the polysaccharide.In recovery process, setting decomposition voltage is 4～6V, and setting is dilute
Release speed (the i.e. ratio of algae solution flow and air-floating apparatus volume, unit min-1) it is 0.08～0.33min-1.Fixed
When be measured by sampling absorbance calculate whole recovery process average harvest efficiency.As shown in figure 4, result shows,
It is less than 0.12min in dilution rate-1When, the air supporting that the decomposition voltage of 4V can obtain up to more than 91.4% is adopted
Produce effects rate.When dilution rate is gradually increased, want to obtain higher harvest efficiency, then decomposition voltage also need to be by
Gradually improve.In each condition, cycles of concentration all can reach more than 50 times.From the perspective of energy consumption, when dilute
Releasing speed is 0.12min-1, when decomposition voltage is 4V, the energy consumption needed for every kilogram of microalgae (dry weight) of results is
Low, only 0.075kWh.The present inventor is using traditional dissolved air flotation and mechanical air flotation method as comparison to phase
Same algae solution carries out continuous aerating collecting, and result shows, the average harvest efficiency that dissolved air flotation can reach
For 45%, mechanical air flotation rule only has 25%, from the point of view of energy consumption angle, dissolved air flotation harvest every kilogram micro-
Energy consumption needed for algae (dry weight) is 3.4kWh, and mechanical air flotation rule is 4.7kWh, and both is respectively this
45.3 times of invention device and 62.7 times.As can be seen here, this air-floating apparatus significantly reduces the harvesting of microalgae
Energy consumption.
Embodiment 4：The granularmetric analyses of the produced bubble of air-floating apparatus
According to the specific embodiment described in embodiment 1, before air supporting starts, first pass through evacuated tube toward cylinder
Fill liquid in vivo, close the valve in evacuated tube afterwards, connect and open DC source, now start to be electrolysed
Produce microbubble.Using high speed microscope camera, microimaging is carried out to the bubble in device, and by image
Reason software I mage-Pro Plus 6.0 carries out data analysiss to the image being obtained.Using the method to traditional gas
Floating mode bubble as produced by air soluble method and Mechanical Method also carries out granularmetric analyses.Result shows, as shown in figure 5,
Bubble diameter produced by this air-floating apparatus is minimum, and distribution is extremely concentrated, and more than 85% bubble diameter exists
Between 15～27 microns.In addition, persistently carrying out with air supporting process, bubble grain produced by this air-floating apparatus
Footpath has no significant change, extremely stable, and aerating collecting efficiency also sustainedly and stably maintains more than 90%.And pass
Bubble diameter produced by system air supporting mode is larger, is 100～1000 microns, and distribution does not relatively collect
In.And, persistently carrying out with air supporting process, bubble diameter produced by traditional air supporting mode is gradually increased,
Inhomogeneities also progressively expand, and lead to daf efficiency to be greatly reduced, after such as dissolved air flotation runs 1 hour, its
Daf efficiency from the outset 60% about be reduced to less than 30%, mechanical air flotation rule is reduced to from 40%
10%.The aerating collecting efficiency of microalgae is directly related to bubble diameter, and bubble diameter is less, then aerating collecting effect
Rate is higher.This means to compare traditional air supporting mode, produced by this air-floating apparatus, less bubble is more favourable
In carrying the frustule in supernatant liquid body, meanwhile, centralized particle diameter, individual uniform bubble significantly reduce gas
The disturbance that bubble produces to liquid, is more beneficial for maintaining the air supporting state of liquid stabilising.
Embodiment 5：The mixed effect of pipe-line mixer
Adding shitosan in Biomass about the chlorella algae solution of 1.2g/L makes its final concentration of 25mg/L.With
Five kinds of pipe-line mixers such as spiral plate type, multiaperture-type, eddy cell type, nozzle-type and mixing hair style are as enforcement
Pipe-line mixer described in example 1 chlorella algae solution is carried out mix flocculation, and using traditional mechanical agitation as
Comparison.Result shows, spiral plate type is optimal with the mixing flocculating effect of multiaperture-type pipe-line mixer, flocculation effect
Up to 90～99%, eddy cell type and nozzle-type take second place rate, and flocculation efficiency is 85～88%, and mixing hair style is again
It, flocculation efficiency is 76%.Preferable mixed flocculation effect, every kilogram of microalgae (dry weight) are reached with mechanical agitation
Required energy consumption is 1.05kWh.As can be seen here, the use of pipe-line mixer not only avoids conventional aerating collecting
Subsidiary conventional stirring equipment such as stirring motor in device, mix the use in pond, make air-floating apparatus be configured to
Simplify, increase its portability, and also greatly reduce stirring energy consumption.
Claims (10)
1. a kind of portable low energy consumption air-floating apparatus for microalgae recovery, including base (6), cylinder (8) and upper
Lid (13) it is characterised in that：It is fixed with least one pair of for the electrode group being electrolysed water on described base, described
In electrode group, negative electrode (2) is located at the lower section of anode (1), and described electrode group is powered by DC source (5),
Described negative electrode is circular or square tabular, and described anode is circular or square pectination, palisade or reticulated structure；
Described base side is provided with opening, is connected with outlet (11) and evacuated tube (7) by threeway；On described
Lid side is provided with slag notch (14), and centre is provided with water inlet (12), and described water inlet top is pipe-line mixer
(10).
2. device as claimed in claim 1 it is characterised in that：Described water inlet is horadiam, and liquid passes through
Feed liquor osculum is flowed in cylinder with horizontal direction.
3. device as claimed in claim 1 or 2 it is characterised in that：Described electrode group material is graphite, all kinds of conjunction
Gold, titanium and its one or more of oxide, tantalum and its oxide.
4. device as claimed in claim 1 or 2 it is characterised in that：Described electrode group material is graphite.
5. device as claimed in claim 1 or 2 it is characterised in that：Described water inlet is less than outlet, described
Slag notch be higher than outlet, be provided with valve at described evacuated tube, described water inlet and water outlet height can
Up-down adjustment.
6. device as claimed in claim 1 or 2 it is characterised in that：Described cylinder is cylinder or prism, institute
Stating cylinder is hard transparent material or soft parent material.
7. device as claimed in claim 6, it is characterised in that cylinder is soft parent material, is equipped with net about
Shape enclosing (9).
8. device as claimed in claim 1 or 2 it is characterised in that：Base, cylinder and upper lid three are detachable.
9. the device described in any one of claim 1-8 is used for the application of microalgae recovery it is characterised in that application process
For：Before air supporting starts, first pass through evacuated tube and fill liquid toward in cylinder, connect and open DC source electricity
Solution produces microbubble；Treat that in cylinder, microbubble considerable amount is that in cylinder, liquid is visually changed into approximate breast
When white, start to be passed through algae solution and carry out aerating collecting；The floccule body layer of liquid surface is from going out positioned at upper lid side
Cinder notch flows out, and is flowed out by outlet through the liquid that air supporting removes floccule body, after air supporting terminates, opens emptying
The valve of pipe, by emptying rate of liquid in cylinder.
10. as claimed in claim 9 application it is characterised in that：When carrying out microalgae recovery, using decomposition voltage it is
3～6V, dilution rate is 0.08～0.33min-1, and described dilution rate is algae solution flow and air-floating apparatus volume
Ratio.
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| CN106399045B (en) | 2019-01-04 |
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Application publication date: 20170215 Assignee: Shandong Fengjia Biological Group Co.,Ltd. Assignor: QINGDAO INSTITUTE OF BIOENERGY AND BIOPROCESS TECHNOLOGY, CHINESE ACADEMY OF SCIENCES Contract record no.: X2023980033338 Denomination of invention: A portable low energy consumption air flotation device for microalgae harvesting and its use method Granted publication date: 20190104 License type: Exclusive License Record date: 20230307 |