CN101935227A - Surface-modified foamed ceramic carrier and manufacturing method thereof - Google Patents
Surface-modified foamed ceramic carrier and manufacturing method thereof Download PDFInfo
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- CN101935227A CN101935227A CN2010101190715A CN201010119071A CN101935227A CN 101935227 A CN101935227 A CN 101935227A CN 2010101190715 A CN2010101190715 A CN 2010101190715A CN 201010119071 A CN201010119071 A CN 201010119071A CN 101935227 A CN101935227 A CN 101935227A
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- foamed ceramic
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- metal oxide
- transition metal
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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
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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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- Biological Treatment Of Waste Water (AREA)
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
Abstract
The invention discloses a surface-modified foamed ceramic carrier, which is manufactured by bonding transition metal oxide powder particles onto the specific surfaces of ordinary foamed ceramics by cold gas dynamic spray technology and then performing hydrophilic treatment. A manufacturing method for the surface-modified foamed ceramic carrier comprises the following steps of: (1) cleaning and drying the specific surface of a foamed ceramic body; (2) bonding the transition metal oxide powder particles onto the specific surface of the foamed ceramic body by adopting the cold gas dynamic spray technology; and (3) performing the hydrophilic treatment. Microbes immobilized by the carrier manufactured by the method have high loads; and the carrier can form biomembranes with strong impact strength and can be widely applied to the treatment of wastewater and exhaust gases in environmental engineering.
Description
Technical field:
The present invention relates to a kind of microbial fixed carrier-surface modification foamed ceramics and manufacture method thereof, can be widely used in waste water and waste gas pollution control and treatment in the environmental engineering.
Technical background:
Microbial immobilized technology is meant in the area of space that the method by adopting physics or chemistry is positioned free microorganism to limit, and makes it keep active and uses repeatedly.Be mainly used in fermentative production at first, the later stage seventies, be utilized water treatment field, the research and the application of waste gas pollution control and treatment aspect start from the nineties, become the research focus recently.Microbial immobilized technology demonstrates special advantages in environmental improvement, but as a science and technology that moves to maturity, it is perfect to also have many places to need, and at first should solve the problem of fixation support.Zhang Lan etc. formally propose foamed ceramics as microbial fixed carrier in " preparation of cell immobilization carrier foamed ceramics " (the 27th the 6th phase of volume of " Shandong pottery " December in 2004) literary composition, and made sample has been carried out test analysis.Foamed ceramics is compared with organic class carrier as carrier, its advantage is: to the microorganism toxicological harmless, bioaffinity is good, corrosion-resistant, stability is excellent, mass-transfer performance is good, physical strength is high, simple to operate and cheap and easy to get etc., compare with other mineral-type carriers, advantages such as specific surface area big (specific surface of foamed ceramics is meant the general name on outer surface and internal pore structure surface, and specific surface area is meant external surface area and internal pore structure surface-area sum), suitability are extensive are arranged.Because foamed ceramics mainly is to utilize the absorption property of specific surface to fix microorganism, the microbial film of its formation impacts (in waste gas pollution control and treatment to the impact of institute by gas) to aeration and tolerates insufficient strength in waste water control, come off easily, therefore greatly hindered foamed ceramics as the application of microbial fixed carrier in waste gas and waste water treatment.
Summary of the invention:
The objective of the invention is to overcome above-mentioned defective,,, provide a kind of surface modification foamed ceramic carrier and manufacture method thereof again through hydrophilic treatment by at the method bonding transition metal oxide powder particle of foamed ceramics specific surface with cold air power spraying and coating.The microbial film that forms with its specific surface of the surface modification foamed ceramic carrier of this method manufacturing has the intensity of bigger withstand shock.
For reaching above purpose, method provided by the invention may further comprise the steps: 1. 2. foamed ceramics surface area per unit volume cleaning and drying treatment adopt cold air power spraying and coating technology bonding transition metal oxide powder particle 3. to carry out hydrophilic treatment then on the foamed ceramics specific surface and obtain surface modification foamed ceramic carrier material.
The manufacture method of surface modification foamed ceramic carrier of the present invention is seen process flow sheet. foamed ceramic body 1 can be rectangular parallelepiped or right cylinder etc., foamed ceramic body 1 obtains cleaning the exsiccant specific surface after clean, at the uniform velocity send into and pass through spraying area through tensioning roller 2, spray gun 3 sprays the transition metal oxide powder particle by the cold air power spraying and coating technology on the foamed ceramic body wall surface, send spraying area through conveying roller 4, make hydrophilic treatment through hydrophilic treatment groove 5 again, obtain the surface modification foamed ceramic carrier.
Below be the key point of master operation:
1. foamed ceramic body is carried out cleaning pretreatment, obtain cleaning the exsiccant specific surface, the aperture of foamed ceramic body, porosity, ultimate compression strength, size and shape can be determined according to the requirement of actual engineering;
2. all agglutinating transition metal oxide systems of foamed ceramics surface area per unit volume adopt the preparation of cold air power spraying and coating technology.The principle of cold air power spraying and coating technology is: high pressure compressed gas is carried the transition metal oxide powder particle, is being lower than under its fusing point, makes it produce the viscous deformation bonding wherein with high-speed impact foamed ceramics surface area per unit volume.For the present invention, only need to use the most basic technology of cold air power spraying and coating, be not formed with the coating of certain thickness densification because require the particle that is sprayed.Need only institute and dust last particle bond on specific surface, non-densification gets final product.
The used above-mentioned transition metal oxide powder particle particle diameter of cold air power spraying and coating is 1 micron-400 microns, and optimum grain-diameter is 2-3 a times of microorganism cells diameter.Cold air power spraying and coating adopts high pressure compressed gas as working gas, the air pressure scope is: 1MPa-2.5MPa, the working gas temperature scope is: room temperature-700 ℃. working gas is helium, nitrogen, hydrogen, argon gas, airborne one or more gas mixture bodies.
Used above-mentioned transition metal oxide is to microorganism toxicological harmless or few toxic action in the cold air power spraying and coating, titanium dioxide for example, zirconium dioxide etc.
3. it is moisture that hydrophilic treatment can make the transition metal oxide of surface modification foamed ceramics surface area per unit volume.
The surface modification foamed ceramic carrier of manufacturing of the present invention is compared advantage with existing organic class carrier: good to microorganism toxicological harmless, biological affinity, corrosion-resistant, the stability excellence, mass-transfer performance is good, physical strength is high, simple to operate and moderate being easy to get.
The surface modification foamed ceramic carrier of the manufacturing of the present invention advantage of comparing with other mineral-type carrier is: specific surface area is big, suitability is extensive etc.
The surface modification foamed ceramic carrier of manufacturing of the present invention is compared with the regular foam ceramic monolith, and advantage is: the intensity of its epontic microbial film withstand shock significantly improves.Hydroxyl in the aqueous transition metal oxide can be replaced by the suitable ligand of cell, forms covalent linkage.Cell for prokaryotic organism and fungi, owing to have a large amount of polysaccharide on the cell walls, can be crosslinked by sequestering action and foamed ceramics grain, for protobiont and miniature metazoan, be inlaid with a large amount of protein on the cytoplasmic membrane, amino-acid residue on the proteinic peptide chain can form covalent linkage with the hydroxyl in the aqueous transition metal oxide, and this crosslinked action influences the biological activity of cell hardly.The inner grain specific surface of surface modification foamed ceramic carrier has the aqueous transition metal oxide ion of one deck, the carrying out of the chelatropic reaction when being very beneficial for fixation of microbe, thereby make its specific surface carry out immobilization with absorption-crosslinked complex method to microorganism cells, the intensity of formed microbial film withstand shock improves significantly.Therefore, this carrier will be used widely in the environmental engineering wastewater and waste gas treatment.
Description of drawings:
Accompanying drawing is the manufacturing process flow diagram of surface modification foamed ceramic carrier
1, foamed ceramics
2, tensioning roller
3, spray gun
4, conveying roller
5, hydrophilic treatment groove
Embodiment:
Embodiment
Certain large-scale wastewater treatment plant anaerobic pond, sludge thickener etc. produce a large amount of foul smell uncontrollable discharges, peripheral resident's physical and mental health is brought great harm, this factory collects foul smell by gas skirt, send into biological filtering tower combined working and carry out purifying treatment, obtained good effect, adopt in its biological filtering tower combined working the polylith specification be the surface modification foamed ceramics of 50 * 50 * 25cm as microbial fixed carrier, aperture 1.5cm, porosity 91%, ultimate compression strength 1.25MPa.
Foamed ceramic body is after the pickling drying, adopt the cold air power spraying and coating technology to spray titanium dioxide powder particles at specific surface, the cold air spraying coating process is: driving gas is the mixture of nitrogen and hydrogen, and pressure is 1.0MPa, 100 ℃ of gas temperatures, the particle diameter of powder are the 30-40 micron.After the hydrophilic treatment, obtain required carrier.
The direction of lance ejection is the direction passed through of foul smell and oppositely, i.e. during cold spraying, after foamed ceramic body at the uniform velocity carries out spraying first time by the spraying district, its counter-rotating is placed, and once more at the uniform velocity by the spraying district, carries out spraying the second time.
Claims (4)
1. a surface modification foamed ceramic carrier is the method by cold air power spraying and coating, at foamed ceramic body surface adhesion transition metal oxide powder particle, forms after the hydrophilic treatment.
2. carrier according to claim 1, its shape can be penetrating rectangular parallelepiped, right cylinder etc.
3. carrier according to claim 1, its manufacture method may further comprise the steps: 1. 2. foamed ceramics surface area per unit volume cleaning and drying treatment adopt cold air power spraying and coating technology bonding transition metal oxide powder particle 3. to carry out hydrophilic treatment then on the foamed ceramics specific surface and obtain surface modification foamed ceramic carrier material.
4. carrier according to claim 1, its aperture, porosity and ultimate compression strength can be determined according to actual requirement of engineering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010101190715A CN101935227A (en) | 2010-03-03 | 2010-03-03 | Surface-modified foamed ceramic carrier and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101190715A CN101935227A (en) | 2010-03-03 | 2010-03-03 | Surface-modified foamed ceramic carrier and manufacturing method thereof |
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| CN101935227A true CN101935227A (en) | 2011-01-05 |
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| CN2010101190715A Pending CN101935227A (en) | 2010-03-03 | 2010-03-03 | Surface-modified foamed ceramic carrier and manufacturing method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1834542A (en) * | 2005-03-18 | 2006-09-20 | 广州市华之特奥因特种材料科技有限公司 | Indoor air purifier using photocatalytic oxidation process |
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2010
- 2010-03-03 CN CN2010101190715A patent/CN101935227A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1834542A (en) * | 2005-03-18 | 2006-09-20 | 广州市华之特奥因特种材料科技有限公司 | Indoor air purifier using photocatalytic oxidation process |
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Application publication date: 20110105 |