CN110845015A - Method for improving evaporation efficiency of salt lake brine by using dunaliella salina - Google Patents
Method for improving evaporation efficiency of salt lake brine by using dunaliella salina Download PDFInfo
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- CN110845015A CN110845015A CN201911152027.1A CN201911152027A CN110845015A CN 110845015 A CN110845015 A CN 110845015A CN 201911152027 A CN201911152027 A CN 201911152027A CN 110845015 A CN110845015 A CN 110845015A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G33/00—Cultivation of seaweed or algae
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
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Abstract
A method for improving evaporation efficiency of salt lake brine by using Dunaliella salina. The method comprises the following steps: (1) weighing dunaliella salina, and placing the dunaliella salina in original brine for amplification culture to obtain an alga solution with the dunaliella salina concentration of 5-8 ten thousand cells/mL; (2) putting the algae liquid obtained in the step (1) into original brine, performing illumination evaporation, allowing the dunaliella salina to grow and propagate in the original brine, and adjusting the concentration of the dunaliella salina to be kept at 15-35 ten thousand cells/mL by adopting original brine guide brine; (3) stopping guiding bittern, continuing illumination evaporation, and separating to obtain salt ore and old bittern; wherein the Dunaliella salina is selected from Dunaliella salina, Dunaliella acidophilus,Dunaliella parva、Dunaliella bardawilAndDunaliella tertiolectaone or more of (a). The method of the invention selects specific dunaliella salina to combine with the brine, promotes the evaporation of the brine and improves the evaporation through the characteristic of color of the dunaliella salinaThe hair-growing efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of salt field chemical engineering, and particularly relates to a method for improving evaporation efficiency of salt lake brine by using dunaliella salina.
Background
China is one of the most salt lakes in the world, the salt lakes are complete in variety, salt lake brine contains abundant mineral resources such as potassium salt, lithium salt, magnesium salt, rock salt, borate and the like, particularly the development of potassium salt and lithium salt is very important, and in addition, the salt lake brine in China also contains a large amount of rare elements and is a strategic resource treasury in China.
Salt lakes in China are mainly distributed in arid and semiarid climatic regions in the northwest and are not uniformly distributed. Domestic researchers utilize the characteristics of strong local illumination, less rainfall, large evaporation capacity and the like to build a salt pan, and utilize natural factors to evaporate salt lake brine to enrich and obtain mineral resources with economic values. However, under natural conditions, the absorption rate of the salt lake brine to sunlight is not high, so that a large area of salt pan is needed to evaporate the brine, thereby causing the defects of high investment cost, large occupied area and the like.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects and providing a method for improving the evaporation efficiency of salt lake brine by using dunaliella salina. The method can effectively improve the evaporation efficiency of the salt lake brine.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for improving evaporation efficiency of salt lake brine by using dunaliella salina comprises the following steps:
(1) weighing dunaliella salina, and placing the dunaliella salina in original brine for amplification culture to obtain an alga solution with the dunaliella salina concentration of 5-8 ten thousand cells/mL;
(2) putting the algae liquid obtained in the step (1) into original brine, performing illumination evaporation, allowing the dunaliella salina to grow and propagate in the original brine, and adjusting the concentration of the dunaliella salina to be kept at 15-35 ten thousand cells/mL by adopting original brine guide brine;
(3) stopping guiding bittern, continuing illumination evaporation, and separating to obtain salt ore and old bittern;
wherein the Dunaliella salina is selected from Dunaliella salina (A)Dunaliella salina) Dunaliella salina (I) and (II)Dunaliella acidophila）、Dunaliella parva、Dunaliella bardawilAndDunaliella tertiolectaone or more of (a).
The dunaliella salina can resist salt genes, can survive in brine with high salt content, contains a cup-shaped pigment body in the brine, contains chlorophyll and carotenoid, and is observed by the inventor to generate heme, chlorophyll and the like in the brine when the living environment changes, so that the water body presents special red, pink, green, blue-green and the like, and the absorption of the water body to sunlight is promoted. The inventor considers that the characteristics are utilized, and the salt algae is introduced into the salt field to promote the evaporation of the salt field brine in combination with the salt field brine. However, the absorption efficiency of sunlight by different dunaliella salina is different, and the requirements of living environment are also different, especially, some dunaliella salina are difficult to survive along with the evaporation of brine and the increase of sodium chloride and other salt concentrations, so that the characteristic is difficult to be applied. Through a great deal of experimental research, the inventor selects Dunaliella salina (A), (B), (C) and (C)Dunaliella salina) Dunaliella salina (I) and (II)Dunaliella acidophila）、Dunaliella parva、Dunaliella bardawilAndDunaliella tertiolectathe evaporation rate of the brine can be effectively improved by more than 10 percent.
More preferably, the Dunaliella salina is selected from Dunaliella salina (Dunaliella salina)Dunaliella salina）、Dunaliella tertiolectaAndDunaliella.parvaone or more of (a).
More preferably, the Dunaliella salina is Dunaliella salina (A)Dunaliella salina) AndDunaliella.parva(ii) a More preferably, the Dunaliella salina is (A), (B), (C), (D), (CDunaliella salina) AndDunaliella.parvathe mass ratio is 5: 2.
Preferably, in step (1), the culture is Dunaliella salina（Dunaliella salina) AndDunaliella.parvaanculturing in the original halogen for 2 days according to the mass ratio of 5: 2.
Preferably, in the step (2), the amount of the algal solution to be added per 1kg of the raw halogen is 0.05 to 0.15 kg.
Preferably, in the step (2), the concentration of the halophytic adjusting Dunaliella salina is kept at 23-35 ten thousand cells/mL.
Preferably, in the steps (1) to (2), the concentration of the original halogen is 40 to 300 g/L.
Preferably, in the step (3), the continuous light evaporation time is 15-45 days.
Preferably, in the step (3), the separation method comprises filtering the salt ore and the slurry through a 20-mesh screen to obtain salt ore and slurry, and performing centrifugal separation on the slurry at 3500-7000 r/min to obtain the algae mud and the old brine.
The invention has the beneficial effects that:
(1) according to the method, specific dunaliella salina is selected to be combined with the raw brine, and the evaporation of the brine is promoted and the evaporation efficiency of a salt pan is improved through the characteristic of color of the dunaliella salina;
(2) in the preferred scheme of the method, the compound of the specific dunaliella salina is selected, and the specific dunaliella salina concentration is combined, so that the evaporation efficiency of brine can be improved to 45% while the dunaliella salina is rapidly propagated.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
Test groups: weighing 0.5g Dunaliella salina (Dunaliella salina), and culturing in 0.2kg of original halogen (concentration of 285 g/L) for 2 days to obtain algae solution with the concentration of 6 ten thousand cells/mL; 100g of algae solution was added to the mixture to evaporate the algae solution to an evaporation area of 0.175m210.0kg of the crude halogen (D) in an atmosphere of 45 humidity and 8000 light intensitylxPerforming illumination evaporation in the environment, controlling the concentration of the dunaliella salina to be 28 ten thousand cells/mL by guiding bittern and guiding bittern, wherein the bittern adopted for guiding the bittern is the same raw bittern, and evaporating for 45 days; stopping supplementing the raw brine, continuing to evaporate for 15 days, filtering by a 20-mesh screen to obtain 2.20kg of salt ore and slurry, centrifugally separating the slurry by 5000r/min,obtaining the algae mud and 5.38kg of old brine, and calculating to obtain 2.52kg of evaporated water.
Control group: while the test group was being carried out, a control group was set so that the evaporation area of the container was 0.175m2And (3) placing 10.1kg of raw brine in the same environment of the test group for illumination evaporation, simultaneously guiding the brine, keeping the speed of guiding the brine to be consistent with that of guiding the brine of the test group, evaporating for 45 days, stopping guiding the brine, continuing to evaporate for 15 days, and filtering to obtain 1.83kg of salt mine and 6.17kg of old brine, wherein the amount of the evaporated water is 2.1 kg.
Compared with the control test, the evaporation efficiency of the embodiment is improved by 20%.
Example 2
Test groups: weighing 0.3g Dunaliella salina (Dunaliella salina) and culturing in 0.2kg of original halogen (concentration of 285 g/L) for 2 days to obtain algae solution with the concentration of 6 ten thousand cells/mL; 100g of algae solution was added to the mixture to evaporate the algae solution to an evaporation area of 0.175m210kg of raw halogen at a humidity of 45 and a light intensity of 8000lxPerforming illumination evaporation in the environment, controlling the concentration of the dunaliella salina to be 30 ten thousand cells/mL by guiding bittern in the evaporation process, wherein the bittern adopted for guiding the bittern is the same raw bittern, performing illumination evaporation for 45 days, stopping supplementing the raw bittern, adjusting the algae concentration, and continuing the illumination evaporation for 15 days; then filtering the mixture by a screen with 20 meshes to obtain 2.07kg of salt mine and slurry, carrying out centrifugal separation on the slurry at 70000r/min to obtain the algae mud and 5.66kg of old brine, and calculating to obtain 2.37kg of evaporated water.
Control group: while the test group was being carried out, a control group was set so that the evaporation area of the container was 0.175m2And (3) placing 10.1kg of raw brine in the same environment of the test group for illumination evaporation, simultaneously guiding the brine, keeping the speed of guiding the brine to be consistent with that of guiding the brine of the test group, evaporating for 45 days, stopping guiding the brine, continuing to evaporate for 15 days, and filtering to obtain 1.85kg of salt mine and 6.13kg of old brine, wherein the evaporation water amount is 2.12 kg.
The evaporation efficiency of the test group of this example was improved by 12% compared to the control group.
Example 3
Weighing 0.5g Dunaliella salina (Dunaliella salina) and 0.2g Dunaliella salina, and culturing in 0.2kg of bittern (285 g/L) for 2 daysTo obtain algae solution with dunaliella salina concentration of 8 ten thousand cells/mL, 100g of algae solution is added into the algae solution with evaporation area of 0.175m210kg of raw halogen at a humidity of 45 and a light intensity of 8000lxPerforming illumination evaporation in the environment, wherein in the evaporation process, original halogen is adopted to guide halogen to control the concentration of the dunaliella salina to be 32 ten thousand cells/mL, and the illumination evaporation is performed for 45 days; stopping supplementing and guiding bittern to adjust the concentration of the algae, and continuing to evaporate for 15 days by illumination; filtering with 20 mesh screen to obtain 2.61g salt ore and slurry, and centrifuging at 7000r/min to obtain algae mud and 4.50kg old bittern. The amount of evaporated water was calculated to be 2.99 kg.
Control group: while the test group was being carried out, a control group was set so that the evaporation area of the container was 0.175m2And (3) placing 10.1kg of raw brine in the same environment of the test group for illumination evaporation, simultaneously guiding the brine, keeping the speed of guiding the brine to be consistent with that of guiding the brine of the test group and guiding the brine for 45 days, stopping guiding the brine, continuing to evaporate for 15 days, and filtering to obtain 1.80kg of salt mine and 6.24kg of old brine, wherein the evaporation water amount is 2.06 kg.
The evaporation efficiency of the test group of this example was improved by 45% compared to the control group.
Example 4
Weighing 0.5g Dunaliella salina (Dunaliella salina) and 0.3g Dunaliella para, culturing in 0.2kg of bittern (concentration of 285 g/L) for 2 days to obtain algae solution with Dunaliella salina concentration of 8 ten thousand cells/mL, adding 100g of algae solution into the solution with evaporation area of 0.175m210kg of raw halogen at a humidity of 45 and a light intensity of 8000lxPerforming illumination evaporation in the environment, wherein in the evaporation process, original halogen is adopted to guide halogen to control the concentration of the dunaliella salina to be 29 ten thousand cells/mL, and the illumination evaporation is performed for 45 days; stopping supplementing original bittern, adjusting algae concentration, continuing illumination and evaporation for 15 days, filtering with 20 mesh screen to obtain 2.49kg salt ore and slurry, and centrifuging the slurry at 6000r/min to obtain algae mud and 4.77kg old bittern. The amount of evaporated water was measured to be 2.84 kg.
Control group: while the test group was being carried out, a control group was set so that the evaporation area of the container was 0.175m210.1kg of raw bittern is placed in the same environment of the experimental group for illumination evaporation, and simultaneously the bittern is led, the bittern led is the bittern adopted by the experimental group and the bittern ledThe speed is kept consistent, evaporation is carried out for 45 days, then the introduction of brine is stopped, evaporation is continued for 15 days, and 1.83kg of salt mine and 6.18kg of old brine are obtained by filtration, wherein the amount of the evaporated water is 2.09 kg.
The evaporation efficiency of the test group of this example was improved by 36% compared to the control group.
Example 5
Culturing Dunaliella salina (Dunaliella salina) 0.5g and Dunaliella tertiolecta 0.2g in 0.2kg of raw bittern (285 g/L) for 2 days to obtain algae solution with Dunaliella salina concentration of 7 ten thousand cells/mL, adding algae solution 100g into the solution with evaporation area of 0.175m210kg of raw halogen at a humidity of 45 and a light intensity of 8000lxPerforming illumination evaporation in the environment, adopting original halogen to guide halogen to control the concentration of the dunaliella salina to be 28 ten thousand cells/mL in the evaporation process, performing illumination evaporation for 45 days, stopping supplementing the original halogen to adjust the concentration of the dunaliella salina, continuing to perform illumination evaporation for 15 days, filtering by a 20-mesh screen to obtain 2.43kg of salt mine and slurry, performing 6000r/min centrifugal separation on the slurry to obtain algae mud and 4.95kg of old brine, and calculating to obtain 2.72kg of evaporated water.
Control group: while the test group was being carried out, a control group was set so that the evaporation area of the container was 0.175m2And (3) placing 10.1kg of raw brine in the same environment of the test group for illumination evaporation, simultaneously guiding the brine, keeping the speed of guiding the brine to be consistent with that of guiding the brine of the test group and guiding the brine for 45 days, stopping guiding the brine, continuing to evaporate for 15 days, and filtering to obtain 1.86kg of salt mine and 6.16kg of old brine, wherein the evaporation water amount is 2.08 kg.
The evaporation efficiency of the test group of this example was increased by 31% compared to the control group.
Claims (9)
1. A method for improving evaporation efficiency of salt lake brine by using dunaliella salina is characterized by comprising the following steps:
(1) weighing dunaliella salina, and placing the dunaliella salina in original brine for amplification culture to obtain an alga solution with the dunaliella salina concentration of 5-8 ten thousand cells/mL;
(2) putting the algae liquid obtained in the step (1) into original brine, performing illumination evaporation, allowing the dunaliella salina to grow and propagate in the original brine, and adjusting the concentration of the dunaliella salina to be kept at 15-35 ten thousand cells/mL by adopting original brine guide brine;
(3) stopping guiding bittern, continuing illumination evaporation, and separating to obtain salt ore and old bittern;
wherein the Dunaliella salina is selected from Dunaliella salina, Dunaliella acidophilus,Dunaliella.parva、Dunaliella bardawilAndDunaliella tertiolectaone or more of (a).
2. The method of claim 1, wherein the Dunaliella salina is selected from Dunaliella salina, and Dunaliella salina in step (1),Dunaliella tertiolectaAndDunaliella.parvaone or more of (a).
3. The method for improving evaporation efficiency of brine in salt lake by using Dunaliella salina as claimed in claim 1 or 2, wherein in step (1), the Dunaliella salina is Dunaliella salinaDunaliella.parva(ii) a More preferably, the Dunaliella salina andDunaliella. Parvathe mass ratio of (A) to (B) is 5: 2.
4. The method for improving evaporation efficiency of brine from salt lake as claimed in any one of claims 1-3, wherein in step (1), said expanded culture is Dunaliella salina and Dunaliella salinaDunaliella.parvaanCulturing in the original halogen for 2 days according to the mass ratio of 5: 2.
5. The method for improving the evaporation efficiency of the brine in the salt lake by using the dunaliella salina according to any one of claims 1 to 4, wherein 1kg of the raw brine is added into the algae liquid in the step (2) in an amount of 0.1 to 0.3 kg.
6. The method for improving the evaporation efficiency of the brine in the salt lake by using the dunaliella salina according to any one of claims 1 to 5, wherein in the step (2), the concentration of the dunaliella salina is kept to be 23-35 ten thousand cells/mL.
7. The method for improving the evaporation efficiency of the brine in the salt lake by using the dunaliella salina according to any one of claims 1 to 6, wherein the concentration of the raw brine in the steps (1) to (2) is 40 to 300 g/L.
8. The method for improving the evaporation efficiency of the brine in the salt lake by using the dunaliella salina according to any one of claims 1 to 7, wherein in the step (3), the continuous illumination evaporation time is 15 to 45 days.
9. The method for improving the evaporation efficiency of the salt lake brine by using the dunaliella salina according to any one of claims 1 to 8, wherein in the step (3), the separation method comprises the steps of filtering the salt lake brine by a 20-mesh screen to obtain salt ores and slurry, and then performing centrifugal separation on the slurry at 3500-7000 r/min to obtain the dunaliella salina mud and old brine.
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Cited By (3)
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| CN109880745A (en) * | 2019-03-15 | 2019-06-14 | 江苏大学 | A method of using pickling waste water, shining bittern water subsection filter salt algae |
| CN114394677A (en) * | 2022-01-18 | 2022-04-26 | 山东海之宝海洋科技有限公司 | Method for treating salt-containing wastewater |
| CN115159546A (en) * | 2022-07-15 | 2022-10-11 | 中国科学院青海盐湖研究所 | Method for improving evaporation efficiency of salt lake brine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109880745A (en) * | 2019-03-15 | 2019-06-14 | 江苏大学 | A method of using pickling waste water, shining bittern water subsection filter salt algae |
| CN114394677A (en) * | 2022-01-18 | 2022-04-26 | 山东海之宝海洋科技有限公司 | Method for treating salt-containing wastewater |
| CN115159546A (en) * | 2022-07-15 | 2022-10-11 | 中国科学院青海盐湖研究所 | Method for improving evaporation efficiency of salt lake brine |
| CN115159546B (en) * | 2022-07-15 | 2024-02-27 | 中国科学院青海盐湖研究所 | Method for improving evaporation efficiency of salt lake brine |
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