CN111960530B - Biological membrane filler, preparation method thereof and device for sewage treatment - Google Patents
Biological membrane filler, preparation method thereof and device for sewage treatment Download PDFInfo
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- CN111960530B CN111960530B CN202011129177.3A CN202011129177A CN111960530B CN 111960530 B CN111960530 B CN 111960530B CN 202011129177 A CN202011129177 A CN 202011129177A CN 111960530 B CN111960530 B CN 111960530B
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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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
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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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
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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
- C02F2101/30—Organic compounds
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a biological membrane filler, a preparation method thereof and a device for sewage treatment. The biological membrane filler comprises a substrate layer and a super-hydrophilic filler layer, wherein the substrate layer is made of high-density polyethylene or high-density polypropylene materials, and the super-hydrophilic filler layer is composed of an aluminum membrane, dendritic nano silver and a polyethylene biological membrane. The upper surface and the lower surface of the biological membrane filler can be provided with water, the upper surface can be provided with water with sludge, only liquid can pass through pores of nano-silver dendrites, the hydrophilicity is excellent, and the nano-silver and polyethylene biological membrane materials act together to accelerate the decomposition of organic matters in sewage; the utilization rate and the service life of the biomembrane filler are improved.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a biological film filler, a preparation method thereof and a sewage treatment device.
Background
The biomembrane method is an efficient wastewater treatment method, and has the characteristics of small sludge amount, no sludge expansion, good adaptability to the change of the water quality and the water quantity of wastewater and simple operation management. Biofilm refers to all biologically active bodies and substances that are attached and immobilized through a medium. In the process of attaching and fixing the biological membrane, a certain medium is needed to bear and complete the fixation, and the medium is called a biological membrane carrier and is also called carrier filler.
Application number CN201410027439.3 discloses a modular intelligence membrane technology sewage treatment device, including equalizing basin, biochemical treatment jar, the MBR membrane bioreactor that connects gradually, equalizing basin, biochemical treatment jar bury underground, still include the sewage regeneration room, MBR membrane bioreactor locate in the sewage regeneration room. The combined type intelligent membrane technology sewage treatment equipment is adopted to carry out sewage treatment. The utilization rate of the biological membrane material is not high, and the hydrophilicity needs to be improved.
Application number CN201910933076.2 discloses a biomembrane filler of oxygen enrichment function, belongs to sewage treatment technical field, and this biomembrane filler of oxygen enrichment function comprises following raw materials: high density polyethylene 90% and magnetic nano Fe3O45-8% of particles and 2-5% of hydrophilic master batch. Although specific components are given, the specific structure is not limited thereto, and the specific surface area is not large.
Disclosure of Invention
Aiming at the above, in order to solve the above problems, a nano hydrophilic biomembrane filler based on laser surface modification is provided, which comprises a substrate layer and a super hydrophilic filler layer.
The substrate layer is made of high-density polyethylene or high-density polypropylene materials, an aluminum film is sprayed on the substrate layer, and the aluminum film is provided with a super-hydrophilic dendritic nano silver structure; the surface of the dendritic nano silver is covered by a polyethylene biological film; irradiating polyethylene biomembrane with ultraviolet laser for 5-30min with average irradiation energy of 50-100 mJ/m2；
The super-hydrophilic filler layer is composed of the aluminum film, the dendritic nano silver and the polyethylene biological film.
The thickness of the basal layer is 500-1000 μm, the thickness of the aluminum film is 100-300 μm, the thickness of the dendritic nano silver is 200-300 μm, and the thickness of the polyethylene biological film is less than 100 μm;
according to the mass percentage, the components of the polyethylene biological film comprise 80 percent of polyethylene, 5 percent of coupling agent, 5 percent of antioxidant and 10 percent of nutrient; the coupling agent is titanate or aluminate, and the antioxidant is antioxidant 1010 or antioxidant TPP; the nutritional agent is the mixture of starch and chitin;
when the biological membrane filler is used, a plurality of layers are superposed for use, and each layer comprises a substrate layer and a super-hydrophilic filler layer; and the interlayer spacing of the biofilm carrier is equal to the overall thickness of the biofilm carrier.
A preparation method of the nano hydrophilic biomembrane filler based on laser surface modification comprises the following steps:
step 3, preparing dendritic nano silver, immersing the material obtained in the step 2 into a mixed solution of a silver nitrate solution with the concentration of 2-5 mmol/L and 5% of dilute sulfuric acid, placing the mixed solution in a vibration-free environment to self-assemble the mixed solution at room temperature for 48-72 hours, and then taking out the material deposited with the micro-nano dendritic silver film by adopting a liquid level uniform descent method to obtain the super-hydrophilic material deposited with the dendritic nano silver;
step 4, spraying a polyethylene biological film, mixing 80% of polyethylene serving as a raw material of the polyethylene biological film, 5% of a coupling agent, 5% of an antioxidant and 10% of a nutritional agent according to mass percentage, spraying the mixture on the material obtained in the step 3 at 180-200 ℃, wherein the average thickness of the sprayed material is ensured to be less than 100 microns, preferably less than 30 microns, and then annealing the sprayed material at 180-200 ℃ for 1-2 hours;
The polyethylene biomembrane spraying in the step 4 requires that the particle size of single particles of the polyethylene biomembrane raw material sprayed in the spraying is less than 1 mu m.
A device for sewage treatment by using a biological membrane filler.
Comprises an aeration bin, a contact bin and a precipitation bin; the bottom parts of the aeration bin and the contact bin are provided with vent pipes, and the vent pipes are connected to a fan and used for blowing air into the aeration bin and the contact bin to promote aerobic decomposition; sewage enters through a water inlet pipe at the top of the aeration bin, and the activated sludge in the aeration bin can digest and decompose organic matters in the sewage in the aeration bin, so that the organic matters are decomposed into carbon dioxide and water; the bottom of the aeration bin is connected with a contact bin, and the contact bin is internally provided with the biofilm filler or the biofilm filler prepared by the method; native microorganisms are parasitized in the biofilm filler, so that organic matters in the sewage in the contact bin are further decomposed;
the top of the aeration bin is connected with the top of the contact bin and is provided with a water return pump, so that sewage subjected to contact treatment of the biofilm filler in the contact bin can be recovered into the aeration bin for secondary treatment; organic matter electrochemical sensors are arranged at the top of the aeration bin and the top of the contact bin and are used for detecting the content of organic matters in sewage in the aeration bin and the contact bin; the electrochemical sensor is connected with the main controller;
the contact bin is communicated with the sedimentation bin, and the bottom of the contact bin and the middle of the sedimentation bin are on the same horizontal line, so that the sludge in the contact bin can flow into the sedimentation bin; a valve is arranged on a pipeline between the contact bin and the precipitation bin and is connected with the main controller;
when the organic matter content detected by the electrochemical sensors in the aeration bin and the contact bin is less than a threshold value, a valve between the contact bin and the precipitation bin is opened, so that sludge and water enter the precipitation bin; after the sewage is precipitated in the precipitation bin, the sludge is discharged from the bottom, and the upper water is pumped out by a water pump through a water outlet to perform other subsequent treatments.
The biological film in the contact bin is a multilayer biological film filler, and the biological film filler is obliquely arranged, so that a water outlet at the top of the biological film filler is aligned with the contact bin and is connected to a pipeline of the aeration bin, and a water inlet at the bottom of the biological film filler is aligned with a connecting pipeline between the contact bin and the precipitation bin; the top of the aeration bin and the top of the contact bin are provided with exhaust ports.
The invention has the beneficial effects that:
the preparation method comprises the steps of preparing a super-hydrophilic structure on a flat polyethylene substrate layer on the basis of dendritic nano silver, spraying a biological membrane material on the super-hydrophilic structure, and annealing to enable the polyethylene biological membrane material to be adhered to the surface of a nano silver material to form the super-hydrophilic biological membrane material, wherein the upper surface and the lower surface of a biological membrane filler can be provided with water through, the upper surface can be provided with water with sludge, only liquid can pass through pores of nano silver dendrites, the hydrophilicity is excellent, and the nano silver and the polyethylene biological membrane material act together to accelerate decomposition of organic matters in sewage; the utilization rate and the service life of the biomembrane filler are improved;
when being applied to sewage treatment device with the biomembrane filler, set up two storehouses that can circulate aeration and contact to make the organic matter decomposition of sewage more thorough, combine the use of organic matter sensor, can control whole sewage treatment flow, guarantee that the sewage organic matter that gets into and deposit the storehouse decomposes thoroughly.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated in and constitute a part of this specification. The drawings illustrate the implementations of the disclosed subject matter and, together with the detailed description, serve to explain the principles of implementations of the disclosed subject matter. No attempt is made to show structural details of the disclosed subject matter in more detail than is necessary for a fundamental understanding of the disclosed subject matter and various modes of practicing the same.
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic flow chart of the preparation method of the present invention.
Detailed Description
The advantages, features and methods of accomplishing the same will become apparent from the drawings and the detailed description that follows.
Example 1:
a nano hydrophilic biomembrane filler based on laser surface modification comprises a substrate layer 1 and a super hydrophilic filler layer.
The substrate layer 1 is made of high-density polyethylene or high-density polypropylene materials, an aluminum film 2 is sprayed on the substrate layer 1, and the aluminum film 2 is provided with a super-hydrophilic dendritic nano silver 3 structure; the surface of the dendritic nano silver 3 is covered by a polyethylene biological film; irradiating polyethylene biomembrane with ultraviolet laser for 5-30min with average irradiation energy of 50-100 mJ/m2；
The super-hydrophilic filler layer is composed of the aluminum film 2, the dendritic nano silver 3 and the polyethylene biomembrane.
The thickness of the substrate layer 1 is 500-1000 μm, the thickness of the aluminum film 2 is 100-300 μm, the thickness of the dendritic nano silver 3 is 200-300 μm, and the thickness of the polyethylene biological film is less than 100 μm;
according to the mass percentage, the components of the polyethylene biological film comprise 80 percent of polyethylene, 5 percent of coupling agent, 5 percent of antioxidant and 10 percent of nutrient; the coupling agent is titanate or aluminate, and the antioxidant is antioxidant 1010 or antioxidant TPP; the nutritional agent is the mixture of starch and chitin;
when the biological membrane filler is used, a plurality of layers are superposed for use, and each layer comprises a substrate layer 1 and a super-hydrophilic filler layer; and the interlayer spacing of the biofilm carrier is equal to the overall thickness of the biofilm carrier.
Example 2:
with reference to fig. 2, a preparation method of the nano hydrophilic biofilm filler based on laser surface modification includes the following steps:
step 3, preparing dendritic nano silver 3, immersing the material obtained in the step 2 into a mixed solution of silver nitrate solution with the concentration of 2-5 mmol/L and 5% dilute sulfuric acid, placing the mixture in a vibration-free environment to self-assemble at room temperature for 48-72 hours, and taking out the material deposited with the micro-nano dendritic silver film by adopting a liquid level uniform descent method to obtain the super-hydrophilic material deposited with the dendritic nano silver 3;
step 4, spraying a polyethylene biological film, mixing 80% of polyethylene serving as a raw material of the polyethylene biological film, 5% of a coupling agent, 5% of an antioxidant and 10% of a nutritional agent according to mass percentage, spraying the mixture on the material obtained in the step 3 at 180-200 ℃, spraying the mixture to ensure that the average thickness of the sprayed mixture is less than 100 microns, preferably less than 30 microns, and then annealing the sprayed mixture for 1-2 hours at the temperature of 180-200 ℃;
The polyethylene biomembrane spraying in the step 4 requires that the particle size of single particles of the polyethylene biomembrane raw material sprayed in the spraying is less than 1 mu m.
Example 3:
referring to fig. 1, a device for sewage treatment by using biofilm filler.
Comprises an aeration bin 4, a contact bin 5 and a precipitation bin 6; the bottom parts of the aeration bin 4 and the contact bin 5 are provided with an air duct 7, and the air duct 7 is connected to a fan 8 and used for blowing air into the aeration bin 4 and the contact bin 5 to promote aerobic decomposition; sewage enters through a water inlet pipe 12 at the top of the aeration bin 4, and organic matters in the sewage in the aeration bin 4 can be digested and decomposed by activated sludge in the aeration bin 4, so that the sewage is decomposed into carbon dioxide and water; the bottom of the aeration bin 4 is connected with the contact bin 5, and the biofilm filler in the embodiment 1 or the biofilm filler prepared by the method in the embodiment 2 is arranged in the contact bin 5; the biological film filler is internally provided with native microorganisms, so that organic matters in the sewage in the contact bin 5 are further decomposed;
the top of the aeration bin 4 is connected with the top of the contact bin 5 and is provided with a water return pump 11, so that sewage subjected to contact treatment of the biofilm filler in the contact bin 5 can be recovered into the aeration bin 4 for secondary treatment; organic matter electrochemical sensors are arranged at the top of the aeration bin 4 and the top of the contact bin 5 and are used for detecting the content of organic matters in sewage in the aeration bin 4 and the contact bin 5; the electrochemical sensor is connected with the main controller;
the contact bin 5 is communicated with the sedimentation bin 6, and the bottom of the contact bin 5 and the middle of the sedimentation bin 6 are on the same horizontal line, so that the sludge in the contact bin 5 can flow into the sedimentation bin 6; a valve 9 is arranged on a pipeline between the contact bin 5 and the precipitation bin 6, and the valve 9 is connected with the main controller;
when the organic matter content detected by the electrochemical sensors in the aeration bin 4 and the contact bin 5 is less than a threshold value, a valve between the contact bin 5 and the precipitation bin 6 is opened, so that sludge and water enter the precipitation bin 6; after the sewage is precipitated in the precipitation bin 6, the sludge is discharged from the bottom, and the upper water is pumped out by a water pump through a water outlet 13 for other subsequent treatment.
The biological film in the contact bin 5 is a multilayer biological film filler, and the biological film filler is obliquely arranged, so that a water outlet at the top of the biological film filler is aligned with the contact bin 5 and is connected to a pipeline of the aeration bin 4, and a water inlet at the bottom of the biological film filler is aligned with a connecting pipeline between the contact bin 5 and the precipitation bin 6; the top of the aeration bin 4 and the contact bin 5 are provided with exhaust ports 10.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. The nano hydrophilic biomembrane filler based on laser surface modification comprises a substrate layer (1) and a super hydrophilic filler layer, and is characterized in that:
the substrate layer (1) is made of high-density polyethylene or high-density polypropylene materials, an aluminum film (2) is sprayed on the substrate layer (1), and the aluminum film (2) is provided with a super-hydrophilic dendritic nano silver (3) structure; the surface of the dendritic nano silver (3) is covered by a polyethylene biological film; irradiating the polyethylene biological film for 5-30min under ultraviolet laser, wherein the average irradiation energy is 50-100 mJ/m 2;
the super-hydrophilic filler layer is composed of the aluminum film (2), the dendritic nano silver (3) and the polyethylene biomembrane.
2. The laser surface modification based nano hydrophilic biofilm filler according to claim 1, characterized in that:
the thickness of the substrate layer (1) is 500-1000 μm, the thickness of the aluminum film (2) is 100-300 μm, the thickness of the dendritic nano silver (3) is 200-300 μm, and the thickness of the polyethylene biological film is less than 100 μm;
according to the mass percentage, the components of the polyethylene biological film comprise 80 percent of polyethylene, 5 percent of coupling agent, 5 percent of antioxidant and 10 percent of nutrient; the coupling agent is titanate or aluminate, and the antioxidant is antioxidant 1010 or antioxidant TPP; the nutritional agent is the mixture of starch and chitin;
the biological membrane filler is used by overlapping a plurality of layers when in use, and each layer comprises a substrate layer (1) and a super-hydrophilic filler layer; and the interlayer spacing of the biofilm carrier is equal to the overall thickness of the biofilm carrier.
3. The preparation method of the nano hydrophilic biomembrane filler based on laser surface modification of claim 1 or 2, characterized by comprising the following steps:
step 1, leveling a substrate layer (1): adhering high-density polyethylene or high-density polypropylene on a hard board, wherein the hard board is made of a metal plate or an acrylic plate, so that the substrate layer (1) is flat and smooth in surface;
step 2, coating a film: spraying a layer of aluminum film (2) on the surface of the substrate layer (1) by adopting a spraying method, and polishing the aluminum film (2) after spraying, but ensuring that the roughness of the aluminum film is more than 0.5 mu m;
step 3, preparing dendritic nano silver (3), immersing the material obtained in the step 2 into a mixed solution of silver nitrate solution with the concentration of 2-5 mmol/L and 5% dilute sulfuric acid, placing the mixture in a vibration-free environment to self-assemble at room temperature for 48-72 hours, and then taking out the material deposited with the micro-nano dendritic silver film by adopting a liquid level uniform descent method to obtain the super-hydrophilic material deposited with the dendritic nano silver (3);
step 4, spraying a polyethylene biological film, mixing 80% of polyethylene serving as a raw material of the polyethylene biological film, 5% of a coupling agent, 5% of an antioxidant and 10% of a nutritional agent according to mass percentage, spraying the mixture on the material obtained in the step 3 at 180-200 ℃ after mixing, ensuring that the average thickness of the sprayed material is less than 100 mu m, and then annealing the sprayed material at 180-200 ℃ for 1-2 hours;
and 5, performing laser surface modification, namely irradiating the polyethylene biological film obtained in the step 4 for 5-30min under ultraviolet laser, wherein the average irradiation energy is 50-100 mJ/m2, and thus obtaining the nano hydrophilic biological film filler based on the laser surface modification.
4. The production method according to claim 3, characterized in that:
the polyethylene biomembrane spraying in the step 4 requires that the particle size of single particles of the polyethylene biomembrane raw material sprayed in the spraying is less than 1 mu m.
5. The utility model provides an use biofilm carrier to carry out sewage treatment's device which characterized in that:
comprises an aeration bin (4), a contact bin (5) and a precipitation bin (6); the bottom parts of the aeration bin (4) and the contact bin (5) are provided with vent pipes (7), and the vent pipes (7) are connected to a fan (8) and used for blowing air into the aeration bin (4) and the contact bin (5) to promote aerobic decomposition; sewage enters through a water inlet pipe (12) at the top of the aeration bin (4), and the activated sludge in the aeration bin (4) can digest and decompose organic matters in the sewage in the aeration bin (4) so as to decompose the organic matters into carbon dioxide and water; the bottom of the aeration bin (4) is connected with the contact bin (5), and the biofilm filler of claim 1 or 2 or the biofilm filler prepared by the method of claim 3 or 4 is arranged in the contact bin (5); native microorganisms are parasitized in the biofilm filler, so that organic matters in the sewage in the contact bin (5) are further decomposed;
the top of the aeration bin (4) is connected with the top of the contact bin (5) and is provided with a water return pump (11), so that sewage subjected to contact treatment of the biofilm filler in the contact bin (5) can be recovered into the aeration bin (4) for secondary treatment; organic matter electrochemical sensors are arranged at the top of the aeration bin (4) and the top of the contact bin (5) and are used for detecting the content of organic matters in sewage in the aeration bin (4) and the contact bin (5); the electrochemical sensor is connected with the main controller;
the contact bin (5) is communicated with the sedimentation bin (6), and the bottom of the contact bin (5) and the middle of the sedimentation bin (6) are on the same horizontal line, so that the sludge in the contact bin (5) can flow into the sedimentation bin (6); a valve (9) is arranged on a pipeline between the contact bin (5) and the precipitation bin (6), and the valve (9) is connected with a main controller;
when the organic matter content detected by the electrochemical sensors in the aeration bin (4) and the contact bin (5) is less than a threshold value, a valve between the contact bin (5) and the precipitation bin (6) is opened, so that sludge and water enter the precipitation bin (6); after the sewage is precipitated in the precipitation bin (6), the sludge is discharged from the bottom, and the upper water is pumped out by a water pump through a water outlet (13) for other subsequent treatment.
6. The wastewater treatment apparatus according to claim 5, wherein:
the biological film filler in the contact bin (5) is a multilayer biological film filler, and the biological film filler is obliquely arranged, so that a water outlet at the top of the biological film filler is aligned with the contact bin (5) and is connected to a pipeline of the aeration bin (4), and the direction of a water inlet at the bottom of the biological film filler is aligned with a connecting pipeline between the contact bin (5) and the precipitation bin (6); the top of the aeration bin (4) and the contact bin (5) are provided with exhaust ports (10).
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668140A (en) * | 2013-09-25 | 2014-03-26 | 北京工业大学 | Preparation method of micro/nano dendritic silver super-hydrophilicity film and application of film in surface enhanced Raman substrate |
| CN103708619A (en) * | 2014-01-21 | 2014-04-09 | 厦门市威士邦膜科技有限公司 | Fluidized bed biofilm filler, and preparation method and filler structure thereof |
| CN103708687A (en) * | 2014-01-21 | 2014-04-09 | 厦门市威士邦膜科技有限公司 | Combined type intelligent film technique sewage treatment equipment and process |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103668140A (en) * | 2013-09-25 | 2014-03-26 | 北京工业大学 | Preparation method of micro/nano dendritic silver super-hydrophilicity film and application of film in surface enhanced Raman substrate |
| CN103708619A (en) * | 2014-01-21 | 2014-04-09 | 厦门市威士邦膜科技有限公司 | Fluidized bed biofilm filler, and preparation method and filler structure thereof |
| CN103708687A (en) * | 2014-01-21 | 2014-04-09 | 厦门市威士邦膜科技有限公司 | Combined type intelligent film technique sewage treatment equipment and process |
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