CN108014643A - A kind of salt algae solution immersion ultrafiltration system and salt algae solution method for concentration - Google Patents

A kind of salt algae solution immersion ultrafiltration system and salt algae solution method for concentration Download PDF

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Publication number
CN108014643A
CN108014643A CN201711343381.3A CN201711343381A CN108014643A CN 108014643 A CN108014643 A CN 108014643A CN 201711343381 A CN201711343381 A CN 201711343381A CN 108014643 A CN108014643 A CN 108014643A
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water
concentration
production
aeration
ultrafiltration
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孙磊
戴海平
孙明
袁心
张程
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Tianjin Motimo Membrane Technology Co Ltd
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Tianjin Motimo Membrane Technology Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/145—Ultrafiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/20—Accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/04—Backflushing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/18—Use of gases

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  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

The present invention provides a kind of salt algae solution immersion ultrafiltration system, including raceway pond, submerged ultrafiltration component, concentration basin, water production system, aerating system and backwashing system, utilize the salt algae solution method for concentration of the ultrafiltration system, effectively concentrated in the salt algae largely bred close under optimum growh Variation of Salinity Condition, while keeping biomass, greatly reduce the volume of Low-salinity algae solution, reduce follow-up to realize height bittern amount that high salinity stress growth conditions adds, pass through the accurate control to ultrafiltration operating pressure, the death rate of salt algae in concentration process can be reduced to greatest extent, obtain more effective biomass.

Description

A kind of salt algae solution immersion ultrafiltration system and salt algae solution method for concentration
Technical field
The present invention relates to salt algae cultural technique field, is a kind of salt algae solution immersion ultrafiltration system and salt algae solution concentration side Method.
Background technology
Dunaliella salina, that is, salt algae is single celled phytoplankton, its thermophilic salt scope is very wide, except to pH value and the infiltration side of body Compel to have outside very strong adaptability, also there is very strong resistance to temperature stress, in production mono- carrotene of β, glycerine, protein feed It is used widely Deng field.The production of salt algae mainly uses extensive open type culture, more using seawater, bittern as culture Base fluid, incubation will not only obtain substantial amounts of biomass, while cause the materials such as mono- carrotene of β largely to add up.Salt algae exists (high salt, low nitrogen and intense light irradiation) will largely accumulate mono- carrotene of β under stress conditions, but be not its optimum growh in this condition Condition.Therefore, two-stage cultivation can be used in production, first obtain higher life with advantages such as appropriate salinity, illumination Thing concentration, then improves salinity and causes frustule largely to accumulate mono- carrotene of β under stress conditions again.After the completion of culture, Biomass harvesting is proceeded by, more using chemical flocculation, centrifugal separation, dissolved air flotation method etc..Nutrient solution warp after separation It can be recycled after crossing refinement treatment, disinfection.
In two-stage incubation, turned out under optimum growh Variation of Salinity Condition after a large amount of salt algaes, it is necessary to increase culture Salt solution degree causes salt algae largely to accumulate mono- carrotene of β, while reduces its harmful organisms by high salinity environment, can by The methods of former reaction tank adds salt or salt algae is transferred to the reaction tank of bigger and supplements height bittern.The former is, it is necessary to consume big Measure the raw materials such as crude salt；The latter, then need to take a large amount of places, increase investment of production cost；Additionally due to frustule very little, very crisp It is weak, it is vulnerable to lesion ruptures, if be easy to causeing the death of salt algae using mechanical system conveying, reduces effective biomass；Meanwhile Due to blending height bittern, the total amount of nutrient solution becomes larger, and adds last use treating capacity, adds harvesting cost.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of salt algae solution immersion ultrafiltration system.
Another technical problem to be solved by this invention is to provide the salt using above-mentioned salt algae solution immersion ultrafiltration system Algae solution method for concentration.
In order to solve the above technical problems, the technical scheme is that：
A kind of salt algae solution immersion ultrafiltration system, including raceway pond (16), submerged ultrafiltration component (2), concentration basin (1), water production system, aerating system and backwashing system, wherein,
Liquid outlet and concentration basin pipeline connection, the pipeline are equipped with inlet valve (17) below the raceway pond (16)；
The concentration basin (1), is internally provided with the submerged ultrafiltration component (2)；
The water production system, by production water centrifugal pump (7), production water regulating valve door (9), production water ga(u)ge (10), production water pressure Table (8) and water tank (11) composition, the production water end (W.E.) of the submerged ultrafiltration component is successively with producing water centrifugal pump (7), production water Control valve (9), production water ga(u)ge (10), the connection of water tank (11) pipeline, the production water pressure table (8) are arranged at immersion On pipeline between hyperfiltration membrane assembly and production water centrifugal pump；
The aerating system, by aeration blower (4), aeration tube (3), aeration intensity control valve (5) and gas flow (6) composition is counted, the aeration tube (3) is arranged at concentration basin bottom, submerged ultrafiltration component underface, and the aeration tube is successively It is connected with gas flowmeter (6), aeration intensity control valve (5) and aeration blower (4) pipeline；
The backwashing system, by backwashing pump (12), backwash flow control valve (14), backwash flowmeter (13) and back wash tank (15) form, the pipeline between the submerged ultrafiltration component and production water centrifugal pump is equipped with bypass line, the bypass line On be sequentially communicated and be provided with backwash flowmeter (13), backwash flow control valve (14), backwashing pump (12), back wash tank (15).
Preferably, above-mentioned salt algae solution immersion ultrafiltration system, the submerged ultrafiltration use filtering accuracy as 0.03- 0.1 μm of hollow fiber ultrafiltration membrane.
Preferably, above-mentioned salt algae solution immersion ultrafiltration system, pipeline, accessory, film in the submerged ultrafiltration component Frame uses anti-corrosion material.
Preferably, above-mentioned salt algae solution immersion ultrafiltration system, the anti-corrosion material are UPVC or ABS.
A kind of salt algae solution method for concentration, realizes the concentration to algae solution, specific method is as follows by immersion ultrafiltration system：
(1) salt algae grows to 2 × 10 in containing raceway pond of the concentration for 10.0-13.5 ° of B é bittern5-10× 105Cells/ml, then by flow by gravity into 1 concentration basin, flow can be controlled by 17 raceway pond inlet valves；
(2) submerged ultrafiltration is in concentration basin, and after 1 concentration basin reaches 2.0-2.2 meters of liquid levels, water production system opens It is dynamic, concentrated, after concentration process starts, production water regulating valve door is opened, production water centrifuges pump startup in submerged ultrafiltration component Produce water end (W.E.) and produce negative pressure, nutrient solution enters water producing pipe road by film outer surface, while salt algae is trapped, with salt algae in raceway pond Continuous entrance, the nutrient solution outflow after having retained, is trapped within salt algae in concentration basin and is continuously increased, salt concentration of algae constantly increases Add；
(3) after the production water time of water production system starts 5-10mi n, the salt algae of film surface, suspended matter, colloid are attached to Add up obvious to concentration polarization phenomenon, filtration flow-rate substantially reduces, and aerating system starts at this time, aeration blower, aeration intensity Control valve is opened, and water production system stops, and production water centrifugal pump, production water regulating valve door are turned off, and concentration basin water inlet continues, and passes through exposure Gas causes the film wire of submerged ultrafiltration component to shake, and and gas friction so that the salt algae of attachment comes off, wherein, aeration is strong Spend 10-20Nm3/m2, aeration time 60-120s, after aeration, aeration blower, aeration intensity control valve are closed, and produce water It is again started up, then stops again after the production water time is reached, aerating system starts, and runs so forth；
(4) to produce water-be aerated as the cycle, after running 6-12 cycle, aeration phase will at the end of, backwashing system opens Dynamic, the purpose of backwashing system is the cleaning strengthened to film, and after backwashing system starts, backwash flow control valve is opened, backwashing pump opens Dynamic, fresh water enters ultrafiltration membrane production water end (W.E.) by backwash pipeline in back wash tank, is produced on the inside of the film wire of submerged ultrafiltration component Pressure from inside to outside, realizes the cleaning to film wire outer surface pollutant, at the same time aeration blower, aeration intensity regulating valve Door, raceway pond inlet valve continue on, and backwash water uses tap water or the fresh water after ultrafiltration, backwash flux 5- 10LMH, backwash time 60-120s, after backwash, backwash flow control valve, backwashing pump, aeration blower, aeration intensity tune Save valve to close, water production system starts, and continues to produce the periodic duty of water-aeration；
(5) after running 6-12h as above, concentration basin inner salt concentration of algae reaches 4 × 105-80×105Cells/ml, this When close raceway pond inlet valve, water production system, aerating system, backwashing system close, convey valve opening, concentration algae solution flow direction High salinity culture pond so that salt algae accumulates the material including beta carotene under high salinity stressful environmental；
(6) after the concentrate in concentration basin all conveying, conveying valve is closed, and raceway pond inlet valve is opened, Form batch operational mode.
Preferably, above-mentioned salt algae solution method for concentration, the system produce the training after submerged ultrafiltration component filters in water Nutrient solution, into production water pot, since ultrafiltration membrance filter precision is high, suspended matter, colloid pollution thing, enemy microorganism are equal in original fluid Do not influenced by effectively catching, while on salt content, therefore, production water may continue as Low-salinity culture after simple process Liquid uses.
Preferably, above-mentioned salt algae solution method for concentration, the concentration rate 2-8 of the concentration basin, concentration rate can pass through runway Pond enters the nutrient solution total amount of concentration basin, averagely produces water inventory control.
Preferably, above-mentioned salt algae solution method for concentration, the ultrafiltration membrane permeant flux 5-8LMH, production water pressure -5 to - 20kPa, produces water time 5-10min.
Preferably, above-mentioned salt algae solution method for concentration, in the step (5) due in concentrate salt concentration of algae it is high, salt algae is thin Born of the same parents' fragility is broken, and therefore, concentrate can use gravity, slow-speed of revolution plug-flow or be conveyed using vacuum generator.
Preferably, above-mentioned salt algae solution method for concentration, the run time of a batch is by into production current in the step (6) Amount, concentration rate, the decision of concentration basin effective volume, wherein, the run time of a batch is 6-12h.
The beneficial effects of the invention are as follows：
Above-mentioned salt algae solution immersion ultrafiltration system is effectively dense in the salt algae largely bred close under optimum growh Variation of Salinity Condition Contracting, while keeping biomass, greatly reduces the volume of Low-salinity algae solution, and it is to realize high salinity stress growth to reduce follow-up Condition and the height bittern amount added, reduce culture pond occupation of land；Using the salt algae solution method for concentration of the system, by ultrafiltration The accurate control of operating pressure, can reduce the death rate of salt algae in concentration process to greatest extent, obtain more effective biomass. Since ultrafiltration membrance filter precision is high, suspended matter, colloid pollution thing, enemy microorganism are by effectively catching in original fluid, at the same time Salt content is not influenced, therefore, production water may continue as the use of Low-salinity nutrient solution after simple process.This method It can be used in salt algae harvest stages, salt algae solution is concentrated, reduced harvesting processing unit processes amount, increase salt concentration of algae, Harvesting unit cost of investment is reduced, improves harvest efficiency.
Brief description of the drawings
Fig. 1 is the structure diagram of salt algae solution immersion ultrafiltration system of the present invention.
In figure：1- concentration basin 2- submerged ultrafiltration component 3- aeration tube 4- aeration blowers
5- aeration intensity control valve 6- gas flowmeters 7- produces water centrifugal pump
8- production water pressure table 9- production water regulating valve door 10- production water ga(u)ges
11- water tank 12- backwashing pump 13- backwash flowmeter 14- backwash flow control valves
15- back wash tank 16- raceway pond 17- inlet valves
Fig. 2 is ultrafiltration system service chart in salt algae solution method for concentration of the present invention.
Embodiment
Technical solution of the present invention is further described with reference to specific embodiment.
Embodiment 1
As shown in Figure 1, a kind of salt algae solution immersion ultrafiltration system, including it is raceway pond 16, submerged ultrafiltration component 2, dense Contracting pond 1, water production system, aerating system and backwashing system, wherein,
The 16 lower section liquid outlet of raceway pond and concentration basin pipeline connection, the pipeline are equipped with inlet valve 17；
The concentration basin 1, is internally provided with the submerged ultrafiltration component 2, and the submerged ultrafiltration in the component uses Filtering accuracy is 0.03-0.1 μm of hollow fiber ultrafiltration membrane, and film frame can be prevented from corroding, kept away using anti-corrosion materials such as UPVC, ABS Exempt to influence algal grown；
The water production system, by production water centrifugal pump 7, production water regulating valve door 9, production water ga(u)ge 10, production water pressure table 8 and production Water tank 11 forms, and the production water end (W.E.) of the submerged ultrafiltration component is successively with producing water centrifugal pump 7, production water regulating valve door 9, production water Flowmeter 10, the connection of 11 pipeline of water tank, the production water pressure table 8 are arranged at submerged ultrafiltration component and production water centrifugal pump Between pipeline on；
The aerating system, by aeration blower 4, aeration tube 3,6 groups of 5 and gas flow meter of aeration intensity control valve Be arranged at concentration basin bottom, immediately below submerged ultrafiltration component into, the aeration tube 3, the aeration tube successively with gas stream Gauge 6, aeration intensity control valve 5 are connected with 4 pipeline of aeration blower；
The backwashing system, by 15 groups of backwashing pump 12, backwash flow control valve 14, backwash flowmeter 13 and back wash tank Bypass line is equipped with into the pipeline between, the submerged ultrafiltration component and production water centrifugal pump, on the bypass line successively It is provided with and communicated with backwash flowmeter 13, backwash flow control valve 14, backwashing pump 12, back wash tank 15.
Above-mentioned pipeline using anti-corrosion materials such as UPVC, ABS, effectively prevents from corroding, and avoids influencing algal grown.
Embodiment 2
A kind of salt algae solution method for concentration, realizes the concentration to algae solution, specifically by immersion ultrafiltration system described in embodiment 1 Method is as follows：
(1) salt algae grows to 5 × 10 in the raceway pond 16 of 12 ° of B é5Cells/ml, then passes through flow by gravity to concentration In pond 1, flow can be controlled by raceway pond inlet valve 17；
(2) submerged ultrafiltration is in concentration basin 1, my 2-8 of the concentration rate of concentration basin, concentration rate can pass through runway Pond enters the nutrient solution total amount of concentration basin, averagely produces water inventory control, and after concentration basin 1 reaches 2.0 meters of liquid levels, water production system opens It is dynamic, concentrated, after concentration process starts, production water regulating valve door 9, which opens, produces water centrifugal pump 7 starts in submerged ultrafiltration group Part 2 produces water end (W.E.) and produces negative pressure, and nutrient solution enters water producing pipe road by film outer surface, while salt algae is trapped, with raceway pond The continuous entrance of salt algae, the nutrient solution outflow after having retained, is trapped within salt algae in concentration basin and is continuously increased, salt concentration of algae is not Disconnected increase, wherein, ultrafiltration membrane permeant flux 5-8LMH, produces water pressure -5--20kPa, produces water time 5-10mi n, can effectively prevent Only production water pressure is excessive causes Dunaliella salina cell dead, and deep layer caused by production water overlong time pollutes；Stream after having retained Go out nutrient solution, i.e. the nutrient solution after the filtering of submerged ultrafiltration component 2 enters production water pot 11, due to ultrafiltration membrance filter precision Height, suspended matter, colloid pollution thing, enemy microorganism are by effectively catching in original fluid, while salt content is not influenced, because This, production water may continue as the use of Low-salinity nutrient solution after simple process；
(3) after the production water time of water production system starts 5-10mi n, the salt algae of film surface, suspended matter, colloid are attached to Accumulation, concentration polarization phenomenon is obvious, and filtration flow-rate substantially reduces, and aerating system starts at this time, aeration blower 4, aeration intensity Control valve 5 is opened, and water production system stops, and production water centrifugal pump 7, production water regulating valve door 9 are turned off, and the water inlet of concentration basin 1 continues, and leads to Crossing aeration causes the film wire of submerged ultrafiltration component to shake, and and gas friction so that the salt algae of attachment comes off, wherein, expose Gas intensity 10-20Nm3/m2, aeration time 60-120s, after aeration, aeration blower 4, aeration intensity control valve 5 close Close, production water is again started up, and is then stopped again after the production water time is reached, aerating system starts, and runs so forth；
(4) to produce water-be aerated as the cycle, after running 6-12 cycle, aeration phase will at the end of, backwashing system opens Dynamic, the purpose of backwashing system is the cleaning strengthened to film, and after backwashing system starts, backwash flow control valve 14 is opened, backwashing pump 12 start, and fresh water enters ultrafiltration membrane production water end (W.E.) by backwash pipeline in back wash tank 15, in the film wire of submerged ultrafiltration component Side produces pressure from inside to outside, realizes the cleaning to film wire outer surface pollutant, and at the same time aeration blower 4, aeration are strong Degree control valve 5, raceway pond inlet valve 17 continue on, and backwash water uses tap water or the fresh water after ultrafiltration, backwash Flux is 5-10LMH, backwash time 60-120s, after backwash, backwash flow control valve 14, backwashing pump 12, aeration blower 4th, aeration intensity control valve 5 is closed, and water production system starts, and continues to produce the periodic duty of water-aeration；
(5) after running 8h as above, concentration basin inner salt concentration of algae reaches 30 × 105Ce l l s/ml, are closed at this time Raceway pond inlet valve 17, water production system, aerating system, backwashing system are closed, and conveying valve 18 is opened, and concentration algae solution flow direction is high Salinity culture pond so that salt algae accumulates the material including mono- carrotene of β under high salinity stressful environmental, due to concentrate Middle salt concentration of algae is high, and Dunaliella salina cell fragility has crushed, and therefore, concentrate can use gravity, slow-speed of revolution plug-flow or profit Conveyed with vacuum generator；
(6) after the concentrate in concentration basin 1 all conveying, conveying valve 18 is closed, raceway pond inlet valve 17 Open, form batch operational mode, the run time of a batch is by into production water flow, concentration rate, concentration basin effective volume Determine, wherein, the run time of a batch is 6-12h.
Embodiment 3
It is about 80m3/d to design water yield.
Design and operation flux 6.7LMH, operating pressure -5 to -20kPa.
System is intended using 8 methods of operation for stopping 2 are opened, that is, produces water 8min aerations 2min.
Concentration basin dischargeable capacity 10m3, concentrate pool size：Length × width × height=2.0 × 2.5 × 2.5m, superelevation 0.5m.
Using 40 curtain 12.5m2Curtain ultrafiltration membrane, 0.1 μm of average pore size, total membrane area 500m2。
4 assembly mould frames are made altogether, are made of per assembly mould frame 10 curtain films.Collector pipe, aeration tube and frame structure are used and drunk Water level UPVC materials make, and consider the corrosive feature of bittern, and membrane cisterna main body uses PP structures.
Concrete structure is referring to embodiment 1, and salt algae solution method for concentration is referring to embodiment 2.
System flow：
Produce water：System produces water by negative-pressure ward, opens inlet valve and intakes to concentration basin, when water level reaches production aqueous position Production penstock and production water pump are opened afterwards, and system production water simultaneously keeps algae solution to enter, and algae solution enters flow velocity 3.33m3/ h, production water is using fortune Row 8min, the mode of aeration 2mi n, production water flow during operation are controlled in 4.17m3/ h, while coordinate Liquid level (liquid level arrives Inlet valve is closed up to upper limit, reaches bottom limit level and closes production water pump, production penstock) so that liquid level is kept within the specific limits Stablize.Aeration intensity 12Nm3/m2, a backwash, backwash flux 8LMH, backwash time 2mi n are carried out after running 6 cycles.Fortune After when row 12 is small, stops water inlet and production water, the algae solution of concentration is conveyed, concentration ratio 5, the results are shown in Table 1,2 and Fig. 2.
1 system operation process parameter table of table
Step Water Tolerance Time
Produce water 4.17m3/h — 8min
Water inlet 3.33m3/h — 10min
Aeration — 60Nm3/h 2min
Backwash 4.0m3/h 60Nm3/h 2min
Discharge 60m3/h —— 10min
2 water analysis of table
Above-mentioned reference embodiment carries out a kind of salt algae solution immersion ultrafiltration system and salt algae solution method for concentration detailed Description, is illustrative rather than limited, several embodiments can be included according to limited scope, therefore do not departing from Changing and modifications under present general inventive concept, should belong within protection scope of the present invention.

Claims (10)

  1. A kind of 1. salt algae solution immersion ultrafiltration system, it is characterised in that：Including raceway pond (16), submerged ultrafiltration component (2), Concentration basin (1), water production system, aerating system and backwashing system, wherein,
    Liquid outlet and concentration basin pipeline connection, the pipeline are equipped with inlet valve (17) below the raceway pond (16)；
    The concentration basin (1), is internally provided with the submerged ultrafiltration component (2)；
    The water production system, by production water centrifugal pump (7), production water regulating valve door (9), production water ga(u)ge (10), production water pressure table (8) Formed with water tank (11), the production water end (W.E.) of the submerged ultrafiltration component is successively with producing water centrifugal pump (7), production water regulating valve Door (9), production water ga(u)ge (10), the connection of water tank (11) pipeline, the production water pressure table (8) are arranged at submerged ultrafiltration On pipeline between component and production water centrifugal pump；
    The aerating system, by aeration blower (4), aeration tube (3), aeration intensity control valve (5) and gas flow meter (6) Composition, the aeration tube (3) are arranged at concentration basin bottom, immediately below submerged ultrafiltration component, the aeration tube successively with gas Flowmeter body (6), aeration intensity control valve (5) are connected with aeration blower (4) pipeline；
    The backwashing system, by backwashing pump (12), backwash flow control valve (14), backwash flowmeter (13) and back wash tank (15) Composition, the pipeline between the submerged ultrafiltration component and production water centrifugal pump are equipped with bypass line, on the bypass line according to It is secondary to be provided with and communicated with backwash flowmeter (13), backwash flow control valve (14), backwashing pump (12), back wash tank (15).
  2. 2. salt algae solution immersion ultrafiltration system according to claim 1, it is characterised in that：The submerged ultrafiltration uses Filtering accuracy is 0.03-0.1 μm of hollow fiber ultrafiltration membrane.
  3. 3. salt algae solution immersion ultrafiltration system according to claim 1, it is characterised in that：The submerged ultrafiltration component In pipeline, accessory, film frame use anti-corrosion material.
  4. 4. salt algae solution immersion ultrafiltration system according to claim 3, it is characterised in that：The anti-corrosion material for UPVC or ABS。
  5. A kind of 5. salt algae solution method for concentration, it is characterised in that：Realized by immersion ultrafiltration system described in claim 1 to algae solution Concentration, specific method is as follows：
    (1) salt algae grows to 2 × 10 in containing raceway pond of the concentration for 10.0-13.5 ° of B é bittern5-10×105Cells/ml, Then by flow by gravity into 1 concentration basin, flow can be controlled by 17 raceway pond inlet valves；
    (2) submerged ultrafiltration is in concentration basin, and after 1 concentration basin reaches 2.0-2.2 meters of liquid levels, water production system starts, into Row concentration, after concentration process starts, production water regulating valve door is opened, production water centrifugation pump startup produces water end (W.E.) in submerged ultrafiltration component Produce negative pressure, nutrient solution enters water producing pipe road by film outer surface, while salt algae is trapped, with raceway pond salt algae it is continuous Into the nutrient solution outflow after having retained, is trapped within salt algae in concentration basin and is continuously increased, salt concentration of algae is continuously increased；
    (3) after the production water time of water production system starts 5-10min, the salt algae of film surface, suspended matter, colloid accumulation are attached to, Concentration polarization phenomenon is obvious, and filtration flow-rate substantially reduces, and aerating system starts at this time, aeration blower, aeration intensity regulating valve Door is opened, and water production system stops, and production water centrifugal pump, production water regulating valve door are turned off, and concentration basin water inlet continues, and passes through aeration The film wire shake of submerged ultrafiltration component, and and gas friction so that the salt algae of attachment comes off, wherein, aeration intensity 10- 20Nm3/m2, aeration time 60-120s, after aeration, aeration blower, aeration intensity control valve are closed, and production water opens again It is dynamic, then stop again after the production water time is reached, aerating system starts, and runs so forth；
    (4) to produce water-be aerated as the cycle, after running 6-12 cycle, aeration phase will at the end of, backwashing system startup, The purpose of backwashing system is the cleaning strengthened to film, and after backwashing system starts, backwash flow control valve is opened, backwash pump startup, Fresh water enters ultrafiltration membrane production water end (W.E.) by backwash pipeline in back wash tank, is produced on the inside of the film wire of submerged ultrafiltration component by interior Outside pressure, realizes the cleaning to film wire outer surface pollutant, at the same time aeration blower, aeration intensity control valve, Raceway pond inlet valve continues on, and backwash water uses tap water or the fresh water after ultrafiltration, backwash flux 5-10LMH, Backwash time 60-120s, after backwash, backwash flow control valve, backwashing pump, aeration blower, aeration intensity control valve Close, water production system starts, and continues to produce the periodic duty of water-aeration；
    (5) after running 6-12h as above, concentration basin inner salt concentration of algae reaches 4 × 105-80×105Cells/ml, is closed at this time Raceway pond inlet valve is closed, water production system, aerating system, backwashing system are closed, and convey valve opening, and concentration algae solution flows to high salt Spend culture pond so that salt algae accumulates the material including beta carotene under high salinity stressful environmental；
    (6) after the concentrate in concentration basin all conveying, conveying valve is closed, and raceway pond inlet valve is opened, and is formed Batch operational mode.
  6. 6. salt algae solution method for concentration according to claim 5, it is characterised in that：Through immersion ultrafiltration in the system production water Nutrient solution after membrane module filtering, into production water pot, since ultrafiltration membrance filter precision is high, suspended matter, colloid are dirty in original fluid Dye thing, enemy microorganism do not influence salt content by effectively catching, and therefore, production water is after simple process Continue to use as Low-salinity nutrient solution.
  7. 7. salt algae solution method for concentration according to claim 5, it is characterised in that：The concentration rate 2-8 of the concentration basin is dense Demagnification rate can be entered the nutrient solution total amount of concentration basin by raceway pond, averagely produce water inventory control.
  8. 8. salt algae solution method for concentration according to claim 5, it is characterised in that：The ultrafiltration membrane permeant flux 5-8LMH, Water pressure -5 is produced to -20kPa, produces water time 5-10min.
  9. 9. salt algae solution method for concentration according to claim 5, it is characterised in that：Concentrate is using weight in the step (5) Power gravity flow, slow-speed of revolution plug-flow are conveyed using vacuum generator.
  10. 10. salt algae solution method for concentration according to claim 5, it is characterised in that：The fortune of a batch in the step (6) The row time by being determined into production water flow, concentration rate, concentration basin effective volume, wherein, the run time of a batch is 6- 12h。
CN201711343381.3A 2017-12-15 2017-12-15 A kind of salt algae solution immersion ultrafiltration system and salt algae solution method for concentration Pending CN108014643A (en)

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