CN112209477B - Biological magnetic fluid activity regeneration treatment method - Google Patents
Biological magnetic fluid activity regeneration treatment method Download PDFInfo
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- CN112209477B CN112209477B CN202011089351.6A CN202011089351A CN112209477B CN 112209477 B CN112209477 B CN 112209477B CN 202011089351 A CN202011089351 A CN 202011089351A CN 112209477 B CN112209477 B CN 112209477B
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/44—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of magnetic liquids, e.g. ferrofluids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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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
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Water Treatment By Electricity Or Magnetism (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a biological magnetic fluid activity regeneration treatment method which comprises five steps of microbial community microwave digestion, magnetization treatment, lattice curing treatment, surface modification treatment and acidification stabilization treatment on biological magnetic fluid which loses activity after long-term use. The invention greatly improves the recovery and utilization rate of the biological magnetic fluid and reduces the economic cost of replacing new biological magnetic fluid and the risk of secondary pollution; the method not only effectively solves the problems of low input rate, high turbidity of produced water, system blockage, large deposition amount and the like of the desulfurization wastewater treatment system, but also lays an important application foundation for implementation of zero discharge of wastewater of a power plant, and has good economic and social benefits.
Description
Technical Field
The invention relates to the technical field of biological materials, in particular to a biological magnetic fluid activity regeneration treatment method.
Background
The magnetic fluid, also called magnetic fluid, is a colloidal solution formed by stably dispersing nanoscale ferromagnetic or ferrimagnetic ultrafine particles in a carrier liquid through surfactant coating modification. The magnetic fluid has stable strong magnetism and liquid fluidity, and has controllable rheological property along with an external magnetic field.
The biological magnetic fluid has the basic properties of high magnetism, high density, large specific surface area, uniform distribution and the like, and is widely researched and applied in various separation fields. With the continuous development of biological magnetic fluid in the field of wastewater treatment, the biological magnetic fluid wastewater treatment flocculation technology has the advantages of high separation efficiency, high settling speed, large specific surface area, low turbidity of produced water and the like, and is vigorously researched and popularized in the field of wastewater advanced treatment in power plants, petrochemical industry, metallurgy and other industries. However, as the biological magnetic fluid material adsorbs the impurity components in the wastewater, the impurity components are gradually saturated, so that the adsorption efficiency of the biological magnetic fluid material on the impurity components is greatly reduced, and even the biological magnetic fluid material completely fails.
At present, the domestic method for replacing the failed biological magnetofluid is generally selected, so that the economic cost of wastewater treatment is greatly increased, and the potential risk of secondary environmental pollution caused by storing failed materials is also possible. At present, the technical field of implementing active regeneration treatment and cyclic utilization to the biological magnetic fluid in China is always in a blank stage. Therefore, a technology for performing active regeneration treatment and recycling on the biological magnetic fluid is needed to improve the utilization rate of the biological magnetic fluid and reduce the investment rate of a desulfurization wastewater treatment system.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a biological magnetic fluid activity regeneration treatment method, so as to solve the problem of high cost caused by failure of the biological magnetic fluid after use, improve the recovery utilization rate of the biological magnetic fluid and reduce the use cost.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
A biological magnetic fluid activity regeneration treatment method comprises the following steps:
s1, digesting flora with microwave
Naturally dehydrating and airing the biological magnetic fluid, and then placing the biological magnetic fluid in a large-scale microwave device for digestion treatment;
s2 magnetization treatment
Collecting the biological magnetic fluid subjected to flora digestion in S1 in a glass container and stirring at a constant speed; soaking the mixed solution of ammonia water and ammonium chloride in the biological magnetic fluid and fully mixing;
s3, lattice ripening treatment
Putting the biological magnetofluid treated in the step S2 into an oven, heating to constant temperature for 60 min;
s4, surface modification treatment
Uniformly leaching the surface of the biological magnetic fluid subjected to lattice curing treatment in S3 by using a sodium lauryl sulfate solution, and slowly stirring; secondly, uniformly and slowly leaching the mixture by using absolute ethyl alcohol;
s5, acidifying and stabilizing treatment
And (4) uniformly rinsing the nitric acid solution on the surface of the biological magnetic fluid treated in the step (S4), slowly stirring, and finally uniformly rinsing with secondary deionized water at a low speed.
Further, the frequency range adjusted by the microwave device in the step S1 is 1000-1500MHz, and the digestion time is controlled for 4-6 hours.
Further, the glass container in the step S2 is a glass container with a stirrer and an inverted cone, the stirring speed is 0.2-0.3r/S, and the stirring time is 10 min.
Further, the mixed solution in the step S2 includes 20-25% of ammonia water and 5-10% of ammonium chloride solution, and the volume ratio of ammonia water to ammonium chloride is 9: 1; the soaking reaction time of the mixed solution in the biological magnetic fluid is 4-5 hours.
Further, the heating temperature of the oven in the step S3 is 60 ℃.
Further, the mass fraction of the sodium lauryl sulfate solution in the step S4 is 10%, the stirring manner is chronic mechanical stirring, the stirring time is 60min, and the stirring speed is 10-15 r/min.
Further, the mass fraction of the nitric acid solution in the step S5 is 5%, the stirring mode is chronic mechanical stirring, the stirring time is 60min, and the stirring speed is controlled to be 10-15 r/min.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
The invention provides an activity regeneration treatment method of a biological magnetic fluid, which realizes the activity regeneration treatment of the biological magnetic fluid which loses activity after long-term use and recovers the original specific surface area, high magnetism and sedimentation separation capability of the biological magnetic fluid; the recovery rate of the biological magnetic fluid is greatly improved, and the economic cost of replacing new biological magnetic fluid and the risk of secondary environmental pollution caused by storage of invalid materials are reduced. The biological magnetic fluid activity regeneration treatment method realizes the effects of fast sedimentation and separation of suspended matters and colloids in the field of advanced treatment of desulfurization wastewater of a thermal power plant, not only effectively solves the problems of low input rate, high turbidity of produced water, system blockage, large deposition amount and the like of a desulfurization wastewater treatment system, but also lays an important application foundation for implementation of zero discharge of wastewater of the power plant, and has good economic benefit and social benefit.
Detailed Description
The present invention will be described in further detail below.
A biological magnetic fluid activity regeneration treatment method comprises five steps of flora microwave digestion, magnetization treatment, lattice curing treatment, surface modification treatment and acidification stabilization treatment, and the specific method comprises the following steps:
s1 microwave digestion of flora
Naturally dehydrating and airing the inactivated biological magnetic fluid, then placing the biological magnetic fluid in a large-scale microwave device to perform digestion treatment on biological flora, adjusting the frequency of the microwave device to be 1000-1500MHz, and controlling the digestion time to be 4-6 hours.
S2 magnetization treatment
Collecting the biological magnetic fluid digested by the flora in the S1 in a glass container with a stirrer and an inverted cone, stirring at a constant speed, and controlling the stirring speed to be 0.2-0.3r/S to prevent Fe3O4And (5) agglomeration of magnetic particles. Preparing a mixed solution of 20-25 percent (mass fraction) of ammonia water and 5-10 percent (mass fraction) of ammonium chloride solution, mixing according to a volume ratio of 9:1, soaking the mixed solution in the biological magnetic fluid which is stirred at a constant speed for 4-5 hours to ensure that the mixed solution and the biological magnetic fluid are subjected to full magnetization reaction.
S3, lattice ripening treatment
Heating the biological magnetic fluid in an oven to 60 deg.C, and heating at constant temperature for 60min to promote Fe3O4The biological magnetic fluid crystal lattice is cured and fixed to prevent oxidation.
S4 surface modification treatment
Uniformly rinsing the surface of the biological magnetic fluid subjected to lattice curing treatment in the step S3 with a sodium lauryl sulfate solution with the mass fraction of 10%, so as to modify the biological magnetic fluid, and performing low-speed mechanical stirring for 60min, wherein the stirring speed is controlled to be 10-15 r/min; secondly, the lauryl sodium sulfate solution remained on the surface of the biological magnetic fluid is uniformly and slowly rinsed by using absolute ethyl alcohol, and the rinsing is clean, so that negative charges carried on the surfaces of the magnetic particles are mutually repelled, and the effect of electrostatic stabilization is achieved.
S5, acidifying and stabilizing treatment
Uniformly rinsing the surface of the biological magnetic fluid subjected to surface modification treatment in the step S4 with a nitric acid solution with the mass fraction of 5%, performing low-speed mechanical stirring for 60min, controlling the stirring speed to be 10-15r/min, finally uniformly rinsing with secondary deionized water at a low speed, and rinsing the residual nitric acid solution on the surface of the biological magnetic fluid, so that the surface of the magnetic particles carries the same positive charges, and the effect of stabilizing the charges is achieved.
The method for regenerating the activity of the modified biological magnetic fluid realizes the regeneration treatment of the activity of the modified biological magnetic fluid which loses activity after being repeatedly used, and recovers the original specific surface area, magnetism and high-efficiency separation capability. The invention greatly improves the recycling rate of the biological magnetic fluid, reduces the economic cost of replacing the new biological magnetic fluid, realizes the rapid sedimentation and separation effect of suspended matters and colloids in the flue gas desulfurization wastewater of the thermal power plant, not only effectively solves the problems of low input rate, high turbidity of produced water, system blockage, large deposition amount and the like of a desulfurization wastewater treatment system, but also lays an important application foundation for the implementation of the zero discharge of the wastewater of the whole plant, and has good economic benefit and social benefit.
Claims (6)
1. The biological magnetic fluid activity regeneration treatment method is characterized by comprising the following steps:
s1 microwave digestion of flora
Naturally dehydrating and airing the biological magnetic fluid, and then placing the biological magnetic fluid in a large-scale microwave device for digestion treatment;
s2 magnetization treatment
Collecting the biological magnetic fluid digested by the flora in the S1 in a glass container and stirring at a constant speed; preparing a mixed solution of 20-25% by mass of ammonia water and 5-10% by mass of ammonium chloride solution, mixing according to a volume ratio of 9:1, soaking the mixed solution in the biological magnetic fluid which is stirred at a constant speed for 4-5 hours to enable the mixed solution and the biological magnetic fluid to be subjected to full magnetization reaction;
s3, lattice ripening treatment
Putting the biological magnetofluid treated in the step S2 into an oven, heating to constant temperature for 60 min;
s4 surface modification treatment
Uniformly leaching the surface of the biological magnetic fluid subjected to lattice curing treatment in S3 by using a sodium lauryl sulfate solution, and slowly stirring; secondly, uniformly and slowly leaching the mixture by using absolute ethyl alcohol;
s5, acidifying and stabilizing treatment
And (4) uniformly leaching the nitric acid solution on the surface of the biological magnetic fluid treated in the step S4, stirring at a low speed, and finally uniformly and slowly leaching and cleaning by using secondary deionized water.
2. The biological magnetic fluid activity regeneration treatment method according to claim 1, characterized in that: the frequency range adjusted by the microwave device in the step S1 is 1000-1500MHz, and the digestion time is controlled for 4-6 hours.
3. The biological magnetic fluid activity regeneration treatment method according to claim 1, characterized in that: the glass container in the step S2 is a glass container with an inverted cone attached with a stirrer, the stirring speed is 0.2-0.3r/S, and the stirring time is 10 min.
4. The biological magnetic fluid activity regeneration treatment method according to claim 1, characterized in that: the heating temperature of the oven in the step S3 is 60 ℃.
5. The biological magnetic fluid activity regeneration treatment method according to claim 1, characterized in that: the mass fraction of the sodium lauryl sulfate solution in the step S4 is 10%, the stirring mode is chronic mechanical stirring, the stirring time is 60min, and the stirring speed is 10-15 r/min.
6. The method for the active regeneration treatment of biological magnetic fluid according to claim 1, characterized in that: the mass fraction of the nitric acid solution in the step S5 is 5%, the stirring mode is chronic mechanical stirring, the stirring time is 60min, and the stirring speed is controlled to be 10-15 r/min.
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Citations (9)
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| JPS51130674A (en) * | 1975-05-08 | 1976-11-13 | Matsumoto Yushi Seiyaku Kk | A process of recovering magnetic fluid |
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| CN104319054A (en) * | 2014-10-11 | 2015-01-28 | 昆明理工大学 | Manometer magnetofluid and application thereof to purification of pollutants |
| CN105061785A (en) * | 2015-08-21 | 2015-11-18 | 广西大学 | Preparation method of magnetic cellulose microspheres |
| CN107337204A (en) * | 2017-06-28 | 2017-11-10 | 淮阴工学院 | Biomass pyrolytic, which is combined, prepares magnetic active carbon and the method rich in synthesis gas gas |
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2020
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