CN109650557A - A kind of method, microorganism antisludging agent and purposes reducing Calcium in Seawater magnesium ion content - Google Patents
A kind of method, microorganism antisludging agent and purposes reducing Calcium in Seawater magnesium ion content Download PDFInfo
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- CN109650557A CN109650557A CN201910114043.5A CN201910114043A CN109650557A CN 109650557 A CN109650557 A CN 109650557A CN 201910114043 A CN201910114043 A CN 201910114043A CN 109650557 A CN109650557 A CN 109650557A
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/08—Seawater, e.g. for desalination
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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
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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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
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Biodiversity & Conservation Biology (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
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Abstract
The invention discloses a kind of method for reducing Calcium in Seawater magnesium ion content, microorganism antisludging agent and purposes, the methods to comprise the steps of, step 1: aquatic Alcaligenes being inoculated in expand in fluid nutrient medium and are cultivated；Step 2: the aquatic Alcaligenes after will be enlarged by culture are added in the seawater of calcium ions and magnesium ions content to be reduced, and aquatic Alcaligenes density in seawater is made to be not less than 104CFU/ml；Step 3: seawater is cultivated 24 hours or more at 10-37 DEG C；Step 4: seawater being centrifuged or stood, to remove deposit, obtains the seawater that calcium ions and magnesium ions content reduces.The method can be used for preventing reverse osmosis membrane fouling in desalting process.Microorganism antisludging agent provided by the invention is the bacterium solution of the aquatic Alcaligenes.Method of the invention is easy to operate, nontoxic and pollution-free, and to reverse osmosis seawater desalination equipment without particular/special requirement, the cost and post-processing cost of desalination by reverse osmosis can be greatly reduced, realize efficient green scale inhibition.
Description
Technical field
The present invention relates to field of sea water desalting technology, and in particular to it is a kind of reduce Calcium in Seawater magnesium ion content method,
Microorganism antisludging agent and purposes.
Background technique
There is no water, just there is no life, in recent years, water resource is more and more rare.Climate change, arid and population increase etc. are each
Kind factor causes water resource rare.Although earth surface is made of 70% water, only 3% or so fresh water.In addition, fresh water
A big chunk of resource is present in ice sheet and glacier, therefore only 1% surface fresh water is available.If using new or change
Into technology improve water utilization rate, then water-use efficiency significant can improve.For seawater, by its desalination and it can remove
Pollutant therein is translated into the water of suitable mankind's reference, or for the production purposes such as agricultural and mining.
Contain the Ca of high concentration in seawater2+、Mg2+、HCO3 -、SO4 2-Plasma, during reverse osmosis seawater desalting, sea
Water is concentrated, and the precipitating of indissoluble inorganic salts is easily formed on reverse osmosis membrane surface.Sulphur is added before seawater enters reverse osmosis unit
Acid makees antisludging agent, controls seawater pH value in 7.0~7.5 ranges, can effectively prevent in seawater indissoluble inorganic salts in reverse osmosis membrane
Surface forms fouling precipitating.Inorganic salts calgon (SHMP) is a kind of antisludging agent generally used, can be used for preventing CaCO3
And CaSO4Deposition.However, due to the reagent cost used be it is expensive, it is complicated, chemical method application also can be to nature
It is adversely affected with human environment.Therefore, it is necessary to develop a kind of green and inexpensive antisludging agent, it to be used for sea water desalination
Cheng Zhong.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies of existing technologies, provide a kind of green and inexpensive, and can be effectively reduced
The method and antisludging agent of Calcium in Seawater magnesium ion content.
In order to achieve the above object, the present invention provides it is a kind of reduce Calcium in Seawater magnesium ion content method, it includes
Following steps, step 1: aquatic Alcaligenes are expanded to culture in fluid nutrient medium；Step 2: the aquatic production after will be enlarged by culture
Alkali bacterium is added in the seawater of calcium ions and magnesium ions content to be reduced, and aquatic Alcaligenes density in seawater is made to be not less than 104CFU/ml；Step
Rapid 3: seawater is cultivated 24 hours or more at 10-37 DEG C；Step 4: seawater being centrifuged or stood, to remove deposit, is obtained
The seawater that calcium ions and magnesium ions content reduces.The method of reduction Calcium in Seawater magnesium ion content of the invention can also be used in water body with high salt
The removal of calcium ions and magnesium ions.
Preferably, the fluid nutrient medium is 2216E fluid nutrient medium in step 1.
Preferably, the culture refers to cultivates under aeration or oscillating condition in step 3.
Preferably, the seawater is cultivated 24 hours or more at 20-37 DEG C in step 3.
Preferably, centrifugal speed is in 3000-5000r/min, and time of repose is 12-24 hours in step 4.
The method of above-mentioned reduction Calcium in Seawater magnesium ion content can be used in desalting process preventing reverse osmosis membrane knot
Dirt.
The purposes in reverse osmosis membrane fouling is prevented in desalting process the present invention also provides aquatic Alcaligenes, it is described
Aquatic Alcaligenes for reducing Calcium in Seawater magnesium ion content.
In addition the present invention also provides a kind of microorganism antisludging agent, which is the bacterium solution of aquatic Alcaligenes, can
It is used as antisludging agent in desalting process.
Preferably, the concentration of aquatic Alcaligenes is not less than 10 in the microorganism antisludging agent8CFU/ml。
Preferably, the pH value of the microorganism antisludging agent is 6.8-9.0.
The utility model has the advantages that
(1) a kind of active constituent of novel microbial antisludging agent provided by the invention is aquatic Alcaligenes (Alcaligenes
Aquatilis), the bacterium is harmless；Compared with conventional antisludging agent, the microorganism scale inhibitor dosage is few, easy to use,
It is nontoxic and pollution-free, it is degradable, belong to environmentally friendly antisludging agent.
(2) the microorganism antisludging agent that the present invention uses can be generated using calcium and magnesium ion in the seawater has calcite knot
The Organic-inorganic composite biogenic deposit of structure, deposit compact structure are stablized, can be by being centrifuged or precipitating away, Ke Yiyou
Effect reduces Calcium in Seawater, magnesium ion content, prevents reverse osmosis membrane fouling.With the injection of new seawater, bacterium can constantly grow
Breeding and calcium and magnesium ion reaction, maintain the effect of biological scale inhibition, prevent reverse osmosis membrane fouling.
(3) biological antisludging agent of the present invention and the method for reducing Calcium in Seawater magnesium ion content can be used for sea-water reverse osmose
Production and maintenance cost can be greatly reduced to sea-water reverse osmose desalting plant without particular/special requirement in desalination, simple process.
Detailed description of the invention
Fig. 1 is seawater calcium and magnesium ion content change diagram in the experimental group of embodiment 1.
Fig. 2 a is the SEM figure for the deposit that the experimental group of embodiment 1 is formed.
Fig. 2 b is the EDS energy spectrum diagram for the deposit that the experimental group of embodiment 1 is formed.
Fig. 3 is the XRD diagram for the deposit that the experimental group of embodiment 1 is formed.
Fig. 4 is the FT-IR figure for the deposit that the experimental group of embodiment 1 is formed.
Specific embodiment
Below in conjunction with drawings and examples, the following further describes the technical solution of the present invention.
The aquatic Alcaligenes (Alcaligenes aquatilis) that following embodiment uses, size are 0.5-1.2 μ m
0.5-2.6 μm, it is in rod-short, is purchased from Chinese Sea Microbiological Culture Collection administrative center, strain number 1A00086.It should
Bacterium no pathogenicity.
The 2216E culture medium that following embodiment uses is the culture common culture medium of marine source bacterium.
Embodiment 1
Steps are as follows:
1. the expansion culture of aquatic Alcaligenes
1.1 will be stored in the 2216E fluid nutrient medium containing 20% glycerol, the aquatic Alcaligenes that storage temperature is -80 DEG C
Strain take out, be placed under room temperature environment, carry out vigor recovery, then take 100 μ l strains to be inoculated in 2216E fluid nutrient medium
In, at 37 DEG C, 120r/min shaken cultivation 12 hours, obtain bacterium solution；With antiseptic sea water by bacterial density in bacterium solution adjust to
108CFU/ml obtains microorganism antisludging agent.
1.2 are added to the bacterium solution for adjusting density (i.e. microorganism antisludging agent) in seawater.Seawater is collected in Area of The East China Sea,
It through precipitating filtering, is placed in autoclave under the conditions of 121 DEG C the 15min that sterilizes and is made antiseptic sea water, antiseptic sea water is packed into sterile triangle
In flask；The bacterium solution (i.e. microorganism antisludging agent) of 1ml is added in every liter of antiseptic sea water, aquatic Alcaligenes is final concentration of in seawater
105CFU/ml。
1.3 are placed on conical flask in biochemical cultivation case, and 37 DEG C of temperature, 120r/min shaken cultivation；Because thin in seawater
The bacterium speed of growth is slower, therefore the bacterium in air is smaller to the seawater pollution in conical flask, in some embodiments, can also adopt
It is cultivated with the method for aeration.The seawater of aquatic Alcaligenes is added as experimental group, antiseptic sea water is as a control group.It trains respectively
It supports 1 day, 2 days, 3 days, 4 days and 5 days.
1.4 experimental groups and control group are centrifuged respectively at 3000r/min.
Interpretation of result:
1. control group is generated without precipitating, experimental group forms obvious deposit.
2. experimental group Calcium in Seawater magnesium ion content is analyzed:
Using ICP-MS (Perkin Elmer, ICP-OES) test experiments group Calcium in Seawater, magnesium ion content.As a result such as
Fig. 1, as can be seen from the results, experimental group on day 1 when, magnesium ion has dropped 60% or so, and calcium ion has dropped 30% or so, arrives
Calcium ion removal rate reaches 91.8% at the 5th day, and magnesium ion removal rate reaches 68.5%.The calcium ions and magnesium ions content of control group is simultaneously
Without significant change.
3. the deposit formed in pair experimental group is analyzed
Pattern and power spectrum observation are carried out using SEM-EDS (JSM 7500F, Japan Electronics).As a result as shown in Figure 2 b, institute's shape
At deposit contain calcium, magnesium elements, in Fig. 2 a, precipitated product is in the state reunited.
XRD result is analyzed by X-ray diffractometer (X'Pert PRO, PANalytical).As a result such as Fig. 3, by result
It is found that its main component is calcium carbonate magnesium salts.
In Vertex70 Fourier transform infrared/Raman spectrometer of Bruker, using Fourier transform infrared spectroscopy
(FT-IR) chemical composition analysis is carried out to the precipitated product that the seawater of the antisludging agent containing microorganism is formed, as a result such as Fig. 4, contains micro- life
The precipitated product that the seawater of object antisludging agent is formed, is observed that 7 peaks.Wherein 1690cm-1C-O in orresponding amino acid and
The peak C-N, 2520cm-1-2650cm-1CH in orresponding amino acid2Or HCO3 -, 3429cm-1The corresponding peak O-H, 1425cm-1、
876cm-1And 712cm-1The calcium carbonate magnesium salts of counterparty's solution stone structure.It is thus identified that precipitated product contains organic matter and has side
Solve the calcium carbonate magnesium salts of stone structure.
Embodiment 2
After being added to microorganism antisludging agent in the seawater of embodiment 1, viable bacteria concentration detection is carried out to seawater immediately.With sterile
Seawater carries out doubling dilution, and the seawater after taking 100 μ l to dilute is coated on 2216E solid medium, cultivates 72 under the conditions of 25 DEG C
Hour, clump count is counted, obtaining bacterial concentration in 1 seawater of embodiment is 100000CFU/ml.
Embodiment 3
It will be stored in the 2216E fluid nutrient medium containing 20% glycerol, the bacterium for the aquatic Alcaligenes that storage temperature is -80 DEG C
Kind is taken out, and is placed under room temperature environment, carries out vigor recovery, 100 μ l strains is then taken to be inoculated in 2216E fluid nutrient medium,
At 30 DEG C, 120r/min shaken cultivation 16 hours, obtains bacterial density and be greater than 108The microorganism antisludging agent of CFU/ml.
In conclusion aquatic Alcaligenes (Alcaligenes aquatilis) can be formed using calcium ions and magnesium ions in the seawater
Stable organo-mineral complexing biogenic deposit with calcite structure, makes Calcium in Seawater magnesium ion sharp fall, avoids
The generation of reverse osmosis membrane fouling problem during reverse osmosis seawater desalting.This side for reducing Calcium in Seawater magnesium ion content
Method is easy to operate, and dosage is few, nontoxic and pollution-free, to reverse osmosis seawater desalination equipment without particular/special requirement, can replace certain tradition
The antisludging agent for having pollution, be greatly reduced the cost and post-processing cost of desalination by reverse osmosis, realize reverse osmosis seawater desalting mistake
Efficient green scale inhibition in journey.
It is discussed in detail although the contents of the present invention have passed through above preferred embodiment, but it should be appreciated that above-mentioned
Description is not considered as limitation of the present invention.After those skilled in the art have read above content, for of the invention
A variety of modifications and substitutions all will be apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a kind of method for reducing Calcium in Seawater magnesium ion content, which is characterized in that it comprises the steps of,
Step 1: aquatic Alcaligenes are expanded to culture in fluid nutrient medium；
Step 2: the aquatic Alcaligenes after will be enlarged by culture are added in the seawater of calcium ions and magnesium ions content to be reduced, make water in seawater
It produces alkali strain density and is not less than 104CFU/ml；
Step 3: seawater is cultivated 24 hours or more at 10-37 DEG C；
Step 4: seawater being centrifuged or stood, to remove deposit, obtains the seawater that calcium ions and magnesium ions content reduces.
2. the method according to claim 1 for reducing Calcium in Seawater magnesium ion content, which is characterized in that described in step 1
Fluid nutrient medium be 2216E fluid nutrient medium.
3. the method according to claim 1 for reducing Calcium in Seawater magnesium ion content, which is characterized in that described in step 3
Culture refer to and cultivated under aeration or oscillating condition.
4. the method according to claim 1 for reducing Calcium in Seawater magnesium ion content, which is characterized in that described in step 3
Seawater cultivated 24 hours or more at 20-37 DEG C.
5. the method according to claim 1 for reducing Calcium in Seawater magnesium ion content, which is characterized in that in step 4, centrifugation
Speed is in 3000-5000r/min, and time of repose is 12-24 hours.
6. the method according to any one of claims 1-5 for reducing Calcium in Seawater magnesium ion content, which is characterized in that should
Method is for preventing reverse osmosis membrane fouling in desalting process.
7. aquatic Alcaligenes prevent the purposes in reverse osmosis membrane fouling in desalting process, which is characterized in that the water
Alcaligenes are given birth to for reducing the content of Calcium in Seawater magnesium ion.
8. a kind of microorganism antisludging agent, which is characterized in that the microorganism antisludging agent is the bacterium solution of aquatic Alcaligenes.
9. microorganism antisludging agent according to claim 8, which is characterized in that aquatic Alcaligenes in the microorganism antisludging agent
Concentration be not less than 108CFU/ml。
10. microorganism antisludging agent according to claim 9, which is characterized in that the pH value of the microorganism antisludging agent is
6.8-9.0。
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110713959A (en) * | 2019-11-28 | 2020-01-21 | 上海海事大学 | Microbial agent for heavy metal pollution remediation and application thereof |
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| CN106399200A (en) * | 2016-11-08 | 2017-02-15 | 中海油天津化工研究设计院有限公司 | Alcaligenes sp. and application thereof to high-salt high-polymer waste water |
| JP2017164716A (en) * | 2016-03-17 | 2017-09-21 | イビデン株式会社 | Wastewater treatment system and wastewater treatment method |
| CN108754506A (en) * | 2018-05-23 | 2018-11-06 | 上海海事大学 | Biologic inhibitor and anti-corrosion method for inhibiting metallic material corrosion in briny environment |
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Patent Citations (4)
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| CN105623964A (en) * | 2016-03-13 | 2016-06-01 | 中国食品发酵工业研究院 | Technological measure for relieving calcification problem of pit mud |
| JP2017164716A (en) * | 2016-03-17 | 2017-09-21 | イビデン株式会社 | Wastewater treatment system and wastewater treatment method |
| CN106399200A (en) * | 2016-11-08 | 2017-02-15 | 中海油天津化工研究设计院有限公司 | Alcaligenes sp. and application thereof to high-salt high-polymer waste water |
| CN108754506A (en) * | 2018-05-23 | 2018-11-06 | 上海海事大学 | Biologic inhibitor and anti-corrosion method for inhibiting metallic material corrosion in briny environment |
Cited By (1)
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| CN110713959A (en) * | 2019-11-28 | 2020-01-21 | 上海海事大学 | Microbial agent for heavy metal pollution remediation and application thereof |
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