CN106399045B - A kind of portable low energy consumption air-floating apparatus and application method for microalgae recovery - Google Patents
A kind of portable low energy consumption air-floating apparatus and application method for microalgae recovery Download PDFInfo
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Abstract
The present invention relates to a kind of portable low energy consumption air-floating apparatus for microalgae recovery.The device is made of pedestal, cylinder and upper cover three parts, microbubble generator and outlet pipe are fixed on pedestal, microbubble generator is made of a pair of electrodes group, cathode placed below is plate, it is pectination or palisade or netted that anode, which is placed in top, using graphite as electrode group material, powered by DC power supply；Water inlet and slag notch are equipped in upper cover, water inlet is slightly below water outlet, and slag notch is slightly above water outlet, and water outlet top is pipe-line mixer.The present invention generates microbubble using the corrosion-resistant lossless electrode group electrolysis water of bottom of device, by microbubble stick and buoyance lift effect harvesting or removal liquid in particulate matter, achieve the effect that improve harvest efficiency or removal efficiency, reduce energy consumption, simplify technique, is provided simultaneously with easy to remove, the characteristics of being easy to carry about with one.The present invention is especially suitable for the recovery process of micro-algae large-scale culture under the environment such as desert, sea.
Description
Technical field
The present invention relates to a kind of air-floating apparatus and its application methods, adopt specifically, the present invention relates to one kind for microalgae
The portable low energy consumption air-floating apparatus and its application method received.
Background technique
The features such as microalgae has the speed of growth fast, and nutriment enriches is widely used in biological feed, health care food
The fields such as product, food additives.Especially in recent years, with increasingly deficient, the day of Global Environmental Problems of the conventional petrochemical energy
Benefit is severe, is considered as alleviating energy crisis using oil-rich microalgae as the recyclable organism fuel of raw material, reduces environmental nuisance most
Good selection.But since microalgae cell individual is small, the concentration in culture solution is low, results in it that there are difficulty is larger in harvesting, at
This higher problem.According to statistics, in large-scale cultivation, the harvesting cost of microalgae can reach 30% or so of cultivation totle drilling cost.
Currently, the collecting method of microalgae mainly has centrifugal process, filtration method, flocculence and gas floatation process etc..Centrifugal process has energy consumption investment high
Deficiency, filter rule often because frustule block filter opening due to cause filter membrane to fail.Flocculence is usually combined with gas floatation process and is made
With to reach the continuous harvesting of high efficiency, low cost.
Gas floatation process is a kind of to stick algae floccule body thereon to reach buoyance lift by importing micro-bubble into algae solution
Collect the technology of purpose.In the recovery process of microalgae, often as the subsequent step of flocculence, combining for the two make gas floatation process
With the continuity of scale recovery process will be made to become feasible.How steadily to generate abundant and small bubble is that this method obtains
Obtain the key point of higher harvest efficiency.Currently, the generating mode of microbubble mainly has Mechanical Method and air soluble method.The former is formed
Microbubble partial size it is larger, be not easy to stick with algae floccule body.In contrast, the latter can then form the lesser bubble of partial size, relatively suitable
Enrichment for algae floccule body harvests.Nevertheless, dissolved air flotation still has energy consumption investment height, complex process, microbubble
Generation is difficult to continual and steady deficiency.
Application No. is 201310719153.7 Chinese patents to disclose a kind of microalgae Foam concentration recovering device, the device
It is broken up including bubble holding unit, concentration and separation tower, liquid stream cycling element and foam collector unit, gas through gas distributor
After be adhered to microalgae cell surface, bring it into liquid surface formed froth bed, the froth bed by foam diversion pipe input bubble
Foam collector unit obtains concentration algae solution after defoaming.However, the unit that the device is related to is more, structure is relative complex, takes up an area face
Product is larger, and portability is bad, and equipment investment and operating cost are all relatively high, and bubble diameter caused by gas distributor
It is larger, cause air flotation effect to be very restricted.
Disclose a kind of electrolysis air flotation column application No. is 201420310778.8 Chinese patent, the device by
One group of circular ring electrode is installed in flotation column bottom, and the foaming agent that the bubble and cooperation generated by electrolysis water is added reaches floating
The purpose of ore dressing substance.This uses vertical circular ring electrode group, and being electrolysed generated bubble can rise along electrode wooden partition, leads
Bubble is caused to disperse in system unevenly, and bubble can constantly be gathered into the biggish gas of partial size along electrode wooden partition uphill process
Bubble, to reduce daf efficiency.On the other hand, the device be applied to preparation equipment technical field.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, need to develop at present a kind of structure is simple, portability is good, energy consumption compared with
The higher microalgae recovery device of low and efficiency, to meet micro-algae large-scale culture, (microalgae is advised especially under the environment such as desert, sea
Modelling culture) harvesting link.The present invention is intended to provide a kind of new portable low energy consumption air-floating apparatus, is both able to satisfy microalgae
Continuity harvesting, ensures that higher and stable harvest efficiency.
To achieve the above object, the invention adopts the following technical scheme:
A kind of portable low energy consumption air-floating apparatus for microalgae recovery, it is characterised in that: the device by pedestal, cylinder and
Upper cover three parts composition, the three parts are detachable, easy to remove and carrying.
Microbubble generator is fixed with by fixed column on the pedestal, the microbubble generator is by a pair of electrodes group structure
At, wherein cathode is placed below, is plate, and anode is placed in top, is pectination or palisade or netted.The cathode and anode it
Between be equipped with felt pad.The electrode group material is preferably graphite.The electrode group material can also be stainless steel, all kinds of alloys, titanium
And its oxide, tantalum and its oxide etc..The electrode group is powered by DC power supply.
The base side is equipped with opening, is connected by threeway with water outlet and evacuated tube, and the water outlet height is adjustable,
The function of liquid level in control air-floating apparatus is had both, is equipped with valve at the evacuated tube.
The cylinder lower end is connect with pedestal, and upper end is connect with upper cover, and material is transparent glass or organic glass etc.
Hard material can also be the soft materials such as transparent plastics.When cylinder uses soft material, netted enclose is equipped with around cylinder
Gear.
Height-adjustable water inlet is equipped in the upper cover, upper cover side is equipped with slag notch, wherein water inlet slightly below goes out
The mouth of a river, slag notch are slightly above water outlet.The water outlet is horadiam, and liquid is flowed by feed liquor osculum with horizontal direction
In cylinder.
The water inlet top be pipe-line mixer, to mix well containing flocculant to air bearing liquid.
The portable low energy consumption air-floating apparatus is securable on basal plane or hangs on bracket.
When the portable low energy consumption air-floating apparatus is used for the harvesting of microalgae, every kilogram of microalgae (dry weight) of harvest only needs to disappear
Consume 0.043~0.075kWh electric energy.
The present invention provides a kind of portable low energy consumption air-floating apparatus for microalgae recovery, have both been able to satisfy the continuous of microalgae
Property harvesting, ensure that higher and stable harvest efficiency, efficiently solve technical problem as described below:
1. traditional microalgae recovery mode has the deficiency that equipment cost is high, operating cost is high, what the invention patent provided
Air-floating apparatus has the advantage that material price is cheap, operating cost is extremely low, significantly reduces the material and energy of microalgae recovery process
Consumption investment, has saved cost.
2. the deficiency that traditional microalgae recovery equipment has lengthy and tedious structure, complex process, equipment huge, not only operating process
It is cumbersome, and take up a large area, portability is bad, seriously limits the practicality.The air-floating apparatus tool that the invention patent provides
Have that structure is simple, concise in technology, the advantage of compact is easy to remove, is easy to carry about with one, and can be flexibly widely used in micro-
The various types of pilot scale culture modes of algae, are particularly suitable for the harvesting of micro-algae large-scale culture under the environment such as desert, sea.
3. traditional aerating collecting equipment is because the generation of bubble is difficult to long lasting for stabilization, and generated bubble diameter
It is larger, lead to aerating collecting inefficiency, principle of the air-floating apparatus based on electrolysis water that the invention patent provides can stablize real estate
Raw a large amount of lesser bubbles of partial size effectively increase harvest efficiency especially for the floating load of microalgae；Inventor passes through research hair
It is existing, particle is collected again by gas floatation process, generated Air Bubble Size is different, the floating load effect of targeted different size particle
Fruit is significantly different, and 201420310778.8 described device of patent application adheres to short grained bubble load mode using air pocket,
And the application is for this bulky grain of microalgae, the bubble load mode of air pocket is extremely low for the collection efficiency of microalgae, and is changed to small
Bubble more can effectively adhere to microalgae bulky grain, improve the recovery ratio of microalgae.
4. traditional electrofloatation device, as electrolysis electrode, is being electrolysed using substances such as metallic iron, the aluminium being easily corroded
It is also easy to produce metallic salt in the process to mix in cutting, seriously polluted the quality of cutting, therefore is unsuitable for adopting for microalgae
It receives, moreover, on the one hand the consumption of electrode will increase lossy cost leads to conduction on the other hand but also electrode is gradually passivated
Reduced performance, air flotation effect are deteriorated.During the experiment, the electrode that multiple material is substituted is combined experiment to inventor, hair
The substances such as existing metallic iron, aluminium are as electrolysis electrode in economy and electrolysis performance, hence it is evident that are lower than graphite, stainless steel alloy, titanium
And its several electrode materials such as oxide, tantalum and its oxide, and in contrast, graphite electrode is more particularly suitable, corrosion-resistant
Property it is high, it is not only cheap, and the problems such as completely avoid above-mentioned pollution, loss and passivation.
5. the air-floating apparatus principle that the invention patent provides is concise, structurally reasonable, especially it is mounted on the base for producing
The electrode group of raw microbubble, since in electrolytic process, bubbles volume caused by cathode is far more than anode, so by cathode design
It is placed below for plate, by anode design be pectination or palisade or it is netted be placed in top, both can avoid bubble distribution not in this way
Uniformity, and can guarantee that bubble will not be detained and be gathered into biggish bubble.Be electrolysed using direct current rather than alternating current, more
It is to avoid disturbing for more stable generation microbubble, thus the carry out microalgae recovery of continuous-stable；In addition, in preferred electricity
Interpolar away from and decomposition voltage under the conditions of, the device significantly reduce harvest unit mass microalgae energy consumption investment.
6. the air-floating apparatus that the invention patent provides, the pipe-line mixer positioned at water inlet upper end can play stirring and mix
Even effect makes adequately being flocculated to air bearing liquid containing flocculant.This design avoids previous aerating collecting dress
Subsidiary conventional stirring equipment such as stirring motor in setting, the use for mixing pond make air-floating apparatus be configured to increase to simplify
Its portability, while also effectively reducing stirring energy consumption.In addition, opposite position of the application by water outlet, water inlet, slag notch
It is fixed to install, so that microalgae can be realized and be collected by slag notch spilling by the regulation intracorporal fluid change of cylinder, thus
The setting for reducing scraper plate in prior art airfloat equipment (for the microalgae for floating up to the page to be scraped collection), is further simplified
The construction of device improves the portability of air-floating apparatus.
7. the air-floating apparatus that the invention patent provides has horadiam water outlet, liquid is by feed liquor osculum with level
Direction flows into cylinder, this design is uniformly distributed in the horizontal direction when can flow liquid into cylinder, while also will effectively be dropped
It is disturbed caused by when low liquid flows into cylinder.
8. the air-floating apparatus that the invention patent provides uses hard and/or soft material, it is securable on basal plane and/or outstanding
It is hung on bracket, to adapt to various types of Large-scale microalgae training modes.
The invention patent the utility model has the advantages that
1. it is the air-floating apparatus simple structure that the invention patent provides, compact, convenient for safeguarding, it is be easily moved and carries,
The various types of pilot scale culture modes of microalgae flexibly can be widely used in, be particularly suitable for the environment such as desert, sea
The harvesting of lower micro-algae large-scale culture.
2. the air-floating apparatus material that the invention patent provides is cheap, operating cost is low, and microalgae recovery process can be greatly reduced
Material and energy consumption investment, save the cost it is (dry to harvest every kilogram of microalgae under the conditions of preferred electrode spacing and decomposition voltage
Weight) only need consumption 0.043~0.075kWh electric energy.
3. the air-floating apparatus that the invention patent provides generates microbubble based on the principle of electrolysis water, in preferred electrode material
It is sustainable steadily to obtain the minimum bubble of a large amount of partial sizes under the conditions of electrode composition form, harvest efficiency is effectively improved,
Under the conditions ofs preferred decomposition voltage and flow rate of liquid etc., harvest efficiency may be up to 91%~99%.
4. the air-floating apparatus that the invention patent provides, the material of electrode, construction, installation etc. design rationally,
The pipe-line mixer of water inlet upper end avoids additional mixing plant, reduces energy consumption, the water outlet of horadiam is more
It is beneficial to maintain the stabilization of air bearing state in cylinder, hard and/or soft cylinder material are securable on basal plane and/or hang
It is hung on bracket, is more suitable for various types of Large-scale microalgae training modes.
Detailed description of the invention:
Fig. 1 is the structural schematic diagram 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 that microalgae continuously to harvest.
Fig. 5 is bubble size distribution figure caused by this air-floating apparatus.
In Fig. 1: 1, anode；2, cathode；3, felt pad；4, fixed column；5, DC power supply；6, pedestal；7, evacuated tube；8, cylinder
Body；9, netted enclosing；10, pipe-line mixer；11, water outlet；12, water inlet；13, upper cover；14, slag notch.
Specific embodiment
The present invention is further illustrated in conjunction with the embodiments, it should which explanation, following the description is merely to explain this
Invention, is not defined its content.
Embodiment 1: air-floating apparatus specific embodiment
As depicted in figs. 1 and 2, a kind of portable low energy consumption air-floating apparatus, component part include pedestal (6), cylinder (8)
With upper cover (13), three is detachable；The base diameter is 5~30cm, and the pedestal passes through fixed column (4) and a pair of electrodes group
Connection, the electrode group include cathode placed below (2) and the anode (1) for being placed in top, are set between the cathode and anode
Have felt pad (3), the electrode group is powered by DC power supply (5)；The base side is equipped with opening, passes through threeway and water outlet
(11) it is connected with evacuated tube (7)；The cylinder is transparent material, and lower end is connect with pedestal, and the upper end is connect with upper cover；Work as cylinder
Body be soft parent material when, around be equipped with netted enclosing (9)；The barrel diameter is 5~30cm, a height of 50~200cm；
The upper cover diameter is 5~30cm, and the upper cover side is equipped with slag notch (14), and centre is equipped with water inlet (12), the water inlet
Mouth top is pipe-line mixer (10).
In the electrode group, cathode is round or rectangular plate, anode be round or rectangular pectination and/or palisade and/
Or it is netted, cathode and anode spacing are 0.5~10mm.The electrode group material is graphite and/or stainless steel and/or all kinds of conjunctions
Gold and/or titanium and its oxide and/or tantalum and its oxide.
The cylinder is cylindrical body and/or prism, and the cylinder is hard transparent material and/or soft parent material.
The water inlet is horadiam, and liquid is flowed into cylinder by feed liquor osculum with horizontal direction, and water inlet is low
In water outlet, slag notch is higher than water outlet, is equipped with valve at evacuated tube, inlet and outlet height can up and down adjustment.
The portable low energy consumption air-floating apparatus is used for the application of microalgae recovery, is securable on basal plane or hangs on
On bracket.
It before air bearing starts, first passes through evacuated tube and fills liquid in cylinder, close the valve in evacuated tube later, connect
Lead to and open DC power supply, starts electrolysis at this time and generate microbubble.Become quite to enrich i.e. cylinder to microbubble quantity in cylinder
When interior liquid visually becomes approximate milky, start to be passed through algae solution progress aerating collecting.The algae solution is in advance by certain
Ratio stream has added the algae solution of flocculant.The stream by a certain percentage has added the algae solution of flocculant in the pipeline for flowing through water inlet upper end
It is able to mix well and stir when mixer, reaches ideal flocculating effect.Through flocculated algae solution by horadiam into
Liquid osculum is flowed into cylinder with horizontal direction, and floccule body contacts with microbubble, sticks, and to liquid-covered under the effect of its buoyance lift
It is mobile.And the liquid for removing floccule body through air bearing then moves down, and flows out eventually by water outlet.When the flocculation of liquid surface
When body layer gradually thickens, i.e., flowed out from the slag notch for being located at upper cover side.Due to containing bubble in floccule body layer, density is lower than
Algae solution, so slag notch is slightly above water outlet, meanwhile, to avoid the liquid flowed into from water inlet from producing the established flocbed of industry
Raw disturbance, water inlet are set below water outlet.After to the end of air bearing, the valve of evacuated tube is opened, liquid in cylinder is arranged
It is empty.
Embodiment 2: air-floating apparatus is used for the discontinuous harvesting of microalgae
The chlorella algae solution that biomass is about 1.2g/L is flocculated with the chitosan of final concentration of 25mg/L, by the algae
Liquid is added in air-floating apparatus and carries out discrete aerating collecting.In recovery process, setting decomposition voltage is 3~6V, timing sampling
It measures absorbance value and calculates harvest efficiency.The result shows that final can get is up to 91%~99% under each voltage conditions
Harvest efficiency, cycles of concentration are up to 50 times or more, and the time for obtaining best harvest efficiency shortens with the increase of voltage (as schemed
3), but from the point of view of energy consumption angle, when voltage is set as 4V, energy consumption needed for harvesting every kilogram of microalgae (dry weight) is minimum, only
0.043kWh.The present inventor carries out identical algae solution using traditional dissolved air flotation and mechanical air flotation method as control discontinuous
Aerating collecting, the results showed that, the attainable highest harvest efficiency of dissolved air flotation institute is 60%, and mechanical air flotation rule only has
40%, from the point of view of energy consumption angle, energy consumption needed for dissolved air flotation harvests every kilogram of microalgae (dry weight) is 2.2kWh, mechanical air flotation
Rule is 3.4kWh, and the two is respectively 51.2 times and 79.1 times of apparatus of the present invention.It can be seen that this air-floating apparatus is greatly
Reduce the harvesting energy consumption of microalgae.
Embodiment 3: air-floating apparatus is used for the continuous harvesting of microalgae
According to specific embodiment described in embodiment 1, the chlorella algae solution that biomass is about 1.2g/L is persistently led to
Enter in air-floating apparatus and continuously harvested, stream has added chitosan as flocculant to the algae solution in advance, makes chitosan in algae solution
Final concentration of 25mg/L.In recovery process, setting decomposition voltage is 4~6V, and (i.e. algae solution flow and air bearing fill setting dilution rate
Set the ratio of volume, unit min-1) it is 0.08~0.33min-1.Timing sampling measures absorbance value and calculates entire recovery process
Average harvest efficiency.As shown in Figure 4, the results showed that, it is less than 0.12min in dilution rate-1When, the decomposition voltage of 4V can obtain
91.4% or more aerating collecting efficiency must be up to.When dilution rate gradually increases, to obtain higher harvest efficiency, then
Decomposition voltage also needs to be gradually increased.In each condition, cycles of concentration all can reach 50 times or more.From the perspective of energy consumption, when
Dilution rate is 0.12min-1, when decomposition voltage is 4V, energy consumption needed for harvesting every kilogram of microalgae (dry weight) is minimum, only
0.075kWh.The present inventor carries out identical algae solution using traditional dissolved air flotation and mechanical air flotation method as control continuous
Aerating collecting, the results showed that, the attainable average harvest efficiency of dissolved air flotation institute is 45%, and mechanical air flotation rule only has
25%, from the point of view of energy consumption angle, energy consumption needed for dissolved air flotation harvests every kilogram of microalgae (dry weight) is 3.4kWh, mechanical air flotation
Rule is 4.7kWh, and the two is respectively 45.3 times and 62.7 times of apparatus of the present invention.It can be seen that this air-floating apparatus is greatly
Reduce the harvesting energy consumption of microalgae.
Embodiment 4: the granularmetric analysis of bubble produced by air-floating apparatus
According to specific embodiment described in embodiment 1, before air bearing starts, first passes through evacuated tube and infused in cylinder
Full liquid closes the valve in evacuated tube later, connects and open DC power supply, starts electrolysis at this time and generates microbubble.It utilizes
High speed microscope camera carries out microimaging to the bubble in device, and passes through image processing software Image-Pro Plus 6.0
Data analysis is carried out to image obtained.The gas as caused by air soluble method and Mechanical Method in such a way that this method is to traditional air bearing
Bubble also carries out granularmetric analysis.The result shows that as shown in figure 5, bubble diameter caused by the air-floating apparatus is minimum, and distribution is extremely
It concentrates, 85% or more bubble diameter is between 15~27 microns.In addition, with the lasting progress of air bearing process, air bearing dress
Bubble diameter caused by setting has no significant change, extremely stable, aerating collecting efficiency also sustainedly and stably maintain 90% with
On.And bubble diameter caused by traditional air bearing mode is larger, is 100~1000 microns, and distribution is more extensively without concentrating.
Moreover, bubble diameter caused by traditional air bearing mode is gradually increased with the lasting progress of air bearing process, inhomogeneities also by
Step expand, cause daf efficiency to be greatly reduced, as dissolved air flotation run 1 hour after, daf efficiency from the outset 60%
Left and right is reduced to less than 30%, and mechanical air flotation rule is reduced to 10% from 40%.The aerating collecting efficiency of microalgae is directly and bubble
Partial size is related, and bubble diameter is smaller, then aerating collecting efficiency is higher.This means that traditional air bearing mode is compared, air bearing dress
Smaller bubble caused by setting is more advantageous to the frustule carried in supernatant liquid body, meanwhile, centralized particle diameter, the uniform gas of individual
Bubble significantly reduces the disturbance that bubble generates liquid, is more advantageous to the air bearing state for maintaining liquid stabilising.
Embodiment 5: the mixed effect of pipe-line mixer
Chitosan is added in the chlorella algae solution that biomass is about 1.2g/L makes its final concentration of 25mg/L.Use flight
Five kinds of pipe-line mixers such as formula, multiaperture-type, eddy cell type, nozzle-type and mixing hair style are as pipeline described in embodiment 1
Mixer carries out mixing flocculation to chlorella algae solution, and using traditional mechanical stirring as control.The result shows that spiral plate type with
The mixing flocculating effect of multiaperture-type pipe-line mixer is best, and for flocculation efficiency up to 90~99%, eddy cell type and nozzle-type are secondary
It, flocculation efficiency is 85~88%, mixes hair style third, flocculation efficiency 76%.Reach ideal mixing with mechanical stirring
Flocculating effect, energy consumption needed for every kilogram of microalgae (dry weight) are 1.05kWh.It can be seen that the use of pipe-line mixer is not only kept away
The use exempted from conventional stirring equipment such as stirring motor subsidiary in previous aerating collecting device, mixed pond, makes air-floating apparatus
It is configured to increase its portability, and also greatly reduce stirring energy consumption to simplify.
Claims (7)
1. a kind of portable low energy consumption air-floating apparatus for microalgae recovery, including pedestal (6), cylinder (8) and upper cover (13),
It is characterized in that: being fixed at least a pair of electrode group for being used for electrolysis water on the pedestal, cathode (2) is located at sun in the electrode group
The lower section of pole (1), the electrode group are powered by DC power supply (5), and the cathode is round or rectangular plate, and the anode is circle
Shape or rectangular pectination, palisade or reticulated structure；The base side is equipped with opening, passes through threeway and water outlet (11) and emptying
(7) are managed to be connected；The upper cover side is equipped with slag notch (14), and centre is equipped with water inlet (12), and the water inlet top is pipeline
Mixer (10)；
The water inlet is horadiam, and liquid is flowed into cylinder by feed liquor osculum with horizontal direction；
Pedestal, cylinder and upper cover three are detachable；
The water inlet is lower than water outlet, and the slag notch is higher than water outlet, and valve is equipped at the evacuated tube, described
Inlet and outlet height can up and down adjustment.
2. device as described in claim 1, it is characterised in that: the electrode group material is graphite, all kinds of alloys, titanium and its oxygen
One of compound, tantalum and its oxide are a variety of.
3. device as described in claim 1, it is characterised in that: the electrode group material is graphite.
4. device as described in claim 1, it is characterised in that: the cylinder is cylindrical body or prism, and the cylinder is hard
Matter transparent material or soft parent material.
5. device as claimed in claim 4, which is characterized in that cylinder is soft parent material, around be equipped with netted enclosing
(9)。
6. the application that the described in any item devices of claim 1-5 are used for microalgae recovery, which is characterized in that application method are as follows:
It before air bearing starts, first passes through evacuated tube and fills liquid in cylinder, connect and open DC power supply electrolysis generation microbubble；To
When liquid visually becomes approximate milky in microbubble considerable amount, that is, cylinder in cylinder, start to be passed through algae solution progress
Aerating collecting；The floccule body layer of liquid surface is flowed out from the slag notch for being located at upper cover side, and the liquid of floccule body is removed through air bearing
Flowed out by water outlet, to air bearing after, the valve of evacuated tube is opened, by emptying rate of liquid in cylinder.
7. application as claimed in claim 6, it is characterised in that: when carrying out microalgae recovery, use decomposition voltage for 3~6V, it is dilute
Releasing rate is 0.08~0.33min-1, and the dilution rate is the ratio of algae solution flow and air-floating apparatus volume.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510468258.9A CN106399045B (en) | 2015-07-31 | 2015-07-31 | A kind of portable low energy consumption air-floating apparatus and application method for microalgae recovery |
Applications Claiming Priority (1)
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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 |