CN1301917C - Method for killing of microorganism in water by UV-TiO2 photocatalytic reaction and reactor for killing of micro-organisms - Google Patents
Method for killing of microorganism in water by UV-TiO2 photocatalytic reaction and reactor for killing of micro-organisms Download PDFInfo
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- CN1301917C CN1301917C CNB028154770A CN02815477A CN1301917C CN 1301917 C CN1301917 C CN 1301917C CN B028154770 A CNB028154770 A CN B028154770A CN 02815477 A CN02815477 A CN 02815477A CN 1301917 C CN1301917 C CN 1301917C
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 17
- 244000005700 microbiome Species 0.000 title abstract description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title abstract description 6
- 238000013032 photocatalytic reaction Methods 0.000 title abstract 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 141
- 238000004659 sterilization and disinfection Methods 0.000 claims description 91
- 238000007146 photocatalysis Methods 0.000 claims description 85
- 230000001699 photocatalysis Effects 0.000 claims description 85
- 230000001954 sterilising effect Effects 0.000 claims description 53
- 239000011324 bead Substances 0.000 claims description 44
- 239000011941 photocatalyst Substances 0.000 claims description 33
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 28
- 238000006555 catalytic reaction Methods 0.000 claims description 12
- 239000010445 mica Substances 0.000 claims description 11
- 229910052618 mica group Inorganic materials 0.000 claims description 11
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 238000007669 thermal treatment Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 230000002186 photoactivation Effects 0.000 claims description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims 1
- 241000894006 Bacteria Species 0.000 description 22
- 239000011521 glass Substances 0.000 description 19
- 235000010627 Phaseolus vulgaris Nutrition 0.000 description 16
- 244000046052 Phaseolus vulgaris Species 0.000 description 16
- 238000002161 passivation Methods 0.000 description 11
- 150000003254 radicals Chemical class 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 10
- 230000000855 fungicidal effect Effects 0.000 description 9
- 230000035899 viability Effects 0.000 description 8
- 241000233866 Fungi Species 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000968 intestinal effect Effects 0.000 description 7
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
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- 229920000178 Acrylic resin Polymers 0.000 description 2
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- 241000195493 Cryptophyta Species 0.000 description 1
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- 241000588724 Escherichia coli Species 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- -1 acryl Chemical group 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
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- 239000012498 ultrapure water Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
Images
Classifications
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
- C02F1/325—Irradiation devices or lamp constructions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- 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
- C02F2103/002—Grey water, e.g. from clothes washers, showers or dishwashers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/32—Details relating to UV-irradiation devices
- C02F2201/322—Lamp arrangement
- C02F2201/3227—Units with two or more lamps
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
Abstract
There are disclosed a method for killing of microorganisms in the water by UV-TiO2 photocatalytic reaction and a reactor for killing of microorganisms.
Description
Technical field
The present invention relates generally to water sterilization by light-catalyzed reaction.More specifically, the present invention relates to be used for the device of water sterilization and use this device passivation or the method for destruction water microorganism and organic substance, it comprises hydrogen peroxide is added in the water that pollutes, the polluted water that is added with hydrogen peroxide is imported the photo catalysis reactor of the porous bead that comprises fixed photocatalyst, toward wherein injecting air and the past step that wherein applies the UV ray.
Background technology
Typically, the area with low-level rainfall amount faces tap water and the shortage of the water that is used to irrigate.Particularly in Korea S, annual rainfall descends recently, causes the shortage of fresh water.Most of Korea S peasants are using conventional irrigation system, because the economic problems of introducing in the modern rill irrigation cause its efficient low, described rill is irrigated to supply water effectively and given desired region, but requirement is used for the cost with high investment of its foundation.Therefore, in order to solve this difficulty in the irrigation field that is used for the farm crop farming, the essential recirculation of water, particularly waste water.In addition, the recirculation of waste water is essential for the continuous use of seawater or fresh water in the large-scale aquarium.For recirculation waste water, at first, the most important thing is to kill the microorganism in the water.
In order to control bacterium, virus and algae grows are widely used in water sterilization with chlorine in conventional waste recycle system.Yet this water sterilization is disadvantageous, because produce carcinogenic haloform (THM) and residual chloride thing.Especially, residual muriate is debatable in the production of pure water or ultrapure water.In addition, using hi-tech purification process that ozone is used for water sterilization is uneconomic requiring to be used for aspect its cost with high investment that develops and manages.Recently, attempted using photocatalyst, titanium dioxide (TiO
2) sterilization, this sterilisation system it foundation and safeguard aspect be cheap.
Use titanium dioxide (TiO
2) sterilization of photocatalyst is based on following scheme.
[scheme 1]
[scheme 2]
[scheme 3]
According to scheme 1, have sufficient band-gap energy or bigger photon irradiation TiO when using
2The time, photon (hv) overcomes band gap with electronics from valence band (valance band) and is excited to conduction band, and stays the vacant electron site in valence band, hole (h
+).Conduction band electron (e
- CB) and valence band hole (h
+ VB) spread then and move to TiO
2The surface.The hole of electrons excited and generation can with the H in the water
2O, OH
-, organic substance and O
2Participate in redox processes together.
With reference to scheme 2, the hole (h of diffusion
+ VB) with water in OH
-Reaction is to produce OH free radical (OH), perhaps with water molecules (H
2O) reaction produces OH and H
+, and the direct oxidation organic substance.
With reference to scheme 3, electronics (e
- CB) with water in oxygen reaction, produce peroxide radical (O
2 -).Peroxide radical and water molecule reaction produce OH, OH
-And oxygen molecule.When water contained hydrogen peroxide, hydrogen peroxide absorbed the UV energy, produced OH, or and e
- CBPerhaps OH is produced in the reaction of dissolved oxygen.The OH free radical (OH) that produces participates in the oxidation of organic substance.
Yet, use photocatalyst TiO
2And have following several shortcomings according to the sterilization method of reaction mechanism as mentioned above.When pulverous titanium dioxide being added in the water that contains pollutent, use TiO
2The continuous processing of the water of powder causes being used for resuspending TiO
2The consumption of a large amount of electric energy of powder, in addition, photocatalyst should reclaim from the water of having handled.When with TiO
2When directly being coated on the UV-lamp, at the terminal TiO of the time limit of service of lamp
2Undesirably be dropped probably with lamp.In addition, when using TiO
2When being coated with the inside of reactor, if the size of reactor is big, the coating operation is difficulty very.In addition, using TiO
2After the coating, reactor should be higher than 500 ℃ of following thermal treatments, has therefore limited the material that can use in reactor is made.In addition, when with TiO
2When being fixed on the granulated glass sphere, TiO
2Rete gradually from the surface of granulated glass sphere by the etch of successive current.
Summary of the invention
In order to solve the problem that in background technology, runs into, to be used for the reactor of water sterilization by light-catalyzed reaction, with use this device passivation or destruction be included in microorganism in the water and organic substance method deeply and thorough research cause discovery, comprise the device of photo catalysis reactor and use this device to be used for the method for water sterilization, wherein by hydrogen peroxide being added in the pending water, the water that is added with hydrogen peroxide is imported in the photo catalysis reactor of the porous bead that comprises fixed photocatalyst, air is injected photo catalysis reactor and the method that the UV ray puts on photo catalysis reactor is sterilized polluted water, because importing air and hydrogen peroxide can shorten the disinfectant operating time and improve disinfection efficiency, and can build reactor in small size ground, therefore allow it to be installed in narrow place, with remove it, be easy to its cleaning like this, thereby finish the present invention.
Therefore, an object of the present invention is to provide the device that is used for water sterilization, it comprises photo catalysis reactor, and this photo catalysis reactor comprises the porous bead of fixed photocatalyst and is equipped with the UV-lamp that is used for the UV irradiation and is used for the past inlet that wherein injects air.
Another object of the present invention provides the method for microorganism of the effective passivation of the device that is used for water sterilization in polluted water.
The accompanying drawing summary
Combine with accompanying drawing, above and other objects of the present invention, feature and other advantage will be understood clearer from following detailed, wherein
Fig. 1 shows the sectional view of structure that is used for the device of water sterilization according to first embodiment of the present invention;
Fig. 2 shows the side-view that is included in the photo catalysis reactor in apparatus of the present invention;
Fig. 3 has the several photo catalysis reactors that are arranged in parallel, the view that is used for the device of water sterilization according to another embodiment of the invention.
Fig. 4 shows fixedly TiO
2The photo of bead;
Fig. 5 a and 5b show fixedly TiO
2Porous bead and the graphic representation of the fungicidal activity of granulated glass sphere, wherein in Fig. 5 a and 5b, with viable count with to colibacillary sterilizing rate (%) time is mapped respectively;
Fig. 6 a and 6b show according to the sterilization effect of each UV-lamp of diameter of photo catalysis reactor and the graphic representation of viability, wherein with viable count with to colibacillary sterilizing rate (%) time are mapped respectively in Fig. 6 a and 6b;
Fig. 7 a and 7b are graphic representations, wherein when air is injected photo catalysis reactor, with viable count with to colibacillary sterilizing rate (%) time are mapped respectively in Fig. 7 a and 7b;
Fig. 8 shows that the concentration of hydrogen peroxide wherein will be mapped to the time at the sterilizing rate under the different concentration of hydrogen peroxide (%) to the graphic representation of the influence of intestinal bacteria disinfection efficiency when light-catalyzed reaction takes place;
Fig. 9 shows that the concentration of hydrogen peroxide wherein will be mapped to the time at the sterilizing rate under the different concentration of hydrogen peroxide (%) to the graphic representation of the influence of intestinal bacteria disinfection efficiency when not inducing light-catalyzed reaction;
Figure 10 shows the graphic representation of concentration of hydrogen peroxide to the influence of beans rudiment;
Figure 11 a and 11b are graphic representations, wherein when the volume of the water that will handle doubles and induces light-catalyzed reaction, respectively colibacillary viable count and sterilizing rate (%) are mapped to the time in Figure 11 a and 11b;
Figure 12 a and 12b are wherein with viable count with to the sterilizing rate (%) of the water bacterium that is used for the beans rudiment graphic representation to the time mapping; With
Figure 13 a and 13b are wherein with viable count with to the fungicidal rate (%) of the fungi of the water that is used for the beans rudiment graphic representation to the time mapping.
* reference number summary
100: device 10: photo catalysis reactor
11: the porous bead of fixed photocatalyst
12: UV-lamp 13: water outlet
14: water-in 15: internal framework
16: outside framework 17:O shape ring
18: 20: the first retention basins (water resirvoir) of locking gear
21: water-supply pipe 22: working shaft
30: inlet pipe 31: air pump
40: the UV stable device
41: circuit 50: strainer
51: the second retention basins
Implement best mode of the present invention
The present invention relates to be used for the device of water sterilization, it will be described in detail with reference to accompanying drawing.
Fig. 1 shows the structure that is used for the device of water sterilization according to the preferred embodiment of the invention.
As shown in Figure 1, be used for the device 100 of water sterilization, wherein by light-catalyzed reaction with water sterilization, comprise photo catalysis reactor 10, it contains the porous bead 11 of fixed photocatalyst.UV-lamp 12 is axially to be installed at regular intervals in the photo catalysis reactor 10, when being drawn as shade with interlacing line, as in Fig. 2, finding out best, so that lamp 12 is positioned at criss-cross center and end,, when the porous bead 11 with fixed photocatalyst is exposed to from the UV of UV-lamp 12 irradiation, produce the OH free radical thus.Inlet pipe 30 axially is installed in the lower interior part of photo catalysis reactor 10, will injects the inside of photo catalysis reactor 10 from the air of air pump 31 by inlet pipe 30.Water-in 14 and water outlet 13 are installed in the bottom and the top of photo catalysis reactor 10 respectively, and when being positioned at diagonally on the shell of reactor 10 when the longitudinal axis cuts off, have therefore increased the residence time of water in photo catalysis reactor 10.The porous bead 11 that will be used for preventing fixed photocatalyst is from the strainer 50 of reactor 10 undesirable discharges is installed in water-in 14 and the water outlet 13 each.The shell of reactor 10 has sealed structure, and it has inside and outside framework 15 and 16.Internal framework 15 and outside framework 16 are equipped in together each other by locking gear 18, and this locking gear 18 has by rubber to be made, and are clipped in the O shape ring 17 between two frameworks 15 and 16.
The inside and outside framework 15 and 16 of photo catalysis reactor 10 is to be made by transparent acrylic resin (acryl), therefore allows the user to detect by an unaided eye the inside of photo catalysis reactor 10 and the unusual and replacing time of checking UV-lamp 12.
Pearl by using fixed photocatalyst such as white mica pearl or wilkinite pearl can form porous bead 11.At length, as shown in Figure 4, by have the white mica of high porosity 800 ℃ of bakings, the photoactivation agent is coated with its surface, prepares porous bead 11 porous beads of being made by white mica 1400 ℃ of thermal treatments then.This photocatalyst is TiO
2By having big surface-area, the porous bead 11 of fixed photocatalyst is passivation or destroy microorganisms and organic substance effectively.Preferred porous bead diameter is 6-10mm.When diameter was lower than this scope, porous bead was together tightly packed, thus blocking-up water flowing in photo catalysis reactor.On the contrary, when diameter when this scope is above, the total surface area of porous bead reduces, thereby has reduced disinfection efficiency.
Especially, when being exposed to UV-light, the porous bead 11 of fixed photocatalyst in the method for water sterilization as catalyzer.After the porous bead 11 of fixed photocatalyst is used for several times, can easily remove microorganism and the organic substance that absorbs in the hole of porous bead 11 by thermal treatment, therefore allow their semi-permanent use.
It is favourable that the porous bead 11 that is filled in the fixed photocatalyst of photo catalysis reactor inside is compared with the conventional granulated glass sphere of coating photocatalyst, as follows.Porous bead is because their porosity has the receptivity to the excellence of microorganism and organic substance, because their big surface-area have the disinfection efficiency of improvement, and can be by semi-permanent use.On the contrary, granulated glass sphere is because the easy desorption of photocatalyst has short time limit of service, and this desorption is to be caused by the successive current.
According to embodiments of the invention, when the porous bead that uses fixed photocatalyst and granulated glass sphere carry out water sterilization in photo catalysis reactor, with reference to figure 5a and 5b, fixedly TiO
2Pearl have than the coating TiO
2The bigger disinfecting power of granulated glass sphere.
UV-lamp 12 is installed in photo catalysis reactor 10 at regular intervals, and wherein the interval between the UV-lamp influences the disinfection efficiency in the polluted water.Because produce OH free radical (OH) in the time of on from the porous bead 11 of UV-irradiation at fixed photocatalyst of UV-lamp 12 as strong oxidizer, installations of UV-lamp 12 should being embarked on journey, permission is exposed to ultraviolet ray with all porous beads 11.Can change the interval between the UV-lamp 12 according to the size of photo catalysis reactor 10.According to embodiments of the invention, when arranging UV-lamp 12, diameter therein at regular intervals is that 20cm, length are when carrying out the sterilization of water in the cylindric photo catalysis reactor 10 of 72cm, when with 55-80mm be spaced UV-lamp 12 time obtain the most effective sterilization.Yet, when a large amount of polluted water is sterilized, can change the interval between the UV-lamp 12 according to the size of photo catalysis reactor 10.
According to prior art, the electrode of UV-lamp is placed in the photo catalysis reactor, so UV-lamp need cover with expensive quartz, contact with water so that prevent the electrode of UV-lamp.Yet, according to the present invention, can need not silica tube UV-lamp 12 is installed, because the electrode of UV-lamp 12 extends the outside of photo catalysis reactor 10, allow reactor 10 sealing effect completely, therefore reduce the cost of material.Because inside and outside framework 15 and 16 is to be made by transparent acrylic resin, the inside of photo catalysis reactor 10 is visible, therefore allows the user with the naked eye to study any unusual and definite time with the existing lamp 12 of new replacement of lamp 12.In addition, inside and outside structure 15 and 16 is by locking gear 18 equipments, to keep the resistance to air loss of photo catalysis reactor 10.Unclamp locking gear 18 as required, thereby only by unclamping the new replacement UV-lamp 12 of locking gear 18 usefulness.Locking gear 18 can be selected from conventional nuts and bolt and the separable locking gear of other type.
For air being injected photo catalysis reactor 10, inlet pipe 30 is installed in the bottom of photo catalysis reactor 10.Inlet pipe 30 is bored a hole meticulously with porous bead 11 obstructions that prevent its applied photocatalyst, and be connected, so that control air pressure with the air pump 31 that can have or not have setter.Will be from the air of air pump 31 by in the inlet pipe 30 lead-in light catalyticreactors 10, thus the amount of oxygen in water increased.Yet because the inflow of a large amount of air produces the reaction efficiency that therefore warm current also increases water in water, preferred air pump 31 is powerful.
For the porous bead 11 that prevents fixed photocatalyst flows out in the water-supply pipe 21, the strainer 50 that is made of plastics is installed in water-in 14 and water outlet 13.The pore size of strainer 50 can change according to the size of porous bead.
According to the present invention, the device 100 that is used for water sterilization comprises water-supply pipe 21 in addition, water is injected the UV stable device 40 of photo catalysis reactor 10 and 12 operations of control UV-lamp by it.
As mentioned above, comprise photo catalysis reactor 10 according to the device 100 that is used for water sterilization of the present invention, it comprises the porous bead 11 of fixed photocatalyst, UV-lamp 12 and inlet pipe 30.For with a large amount of polluted water sterilizations, as shown in Figure 3, can make or the manufacturing of small size ground and a plurality of photo catalysis reactors 10 that are arranged in parallel then on large size ground.Can be revised by those skilled in the art according to the size and this manufacturing of arranging photo catalysis reactor, the device 100 that is used for water sterilization can be used to sterilize and and then circulation comprise the various water of agricultural water and seawater that uses in the aquarium or fresh water.
According to another aspect of the present invention, provide and use said apparatus 100 passivation or destroy microorganism in polluted water and the method for organic substance.
Method by the light-catalyzed reaction water sterilization comprises step: hydrogen peroxide is added in the pending water; The water that is added with hydrogen peroxide is imported in the photo catalysis reactor 10 of the porous bead 11 that comprises fixed photocatalyst; With air is injected photo catalysis reactors 10 and ultraviolet rays is put on photo catalysis reactor 10 to induce light-catalyzed reaction by inlet pipe 30.
Water from first retention basin 20 flows into photo catalysis reactor 10 by the water-in 14 that is installed in its underpart, and circulation is therein flowed out by water outlet 13 then, and it is stimulated by working shaft 22.Water in photo catalysis reactor 10 is sterilized by the OH free radical, and described OH free radical is when producing uviolizing on porous bead 11 time, and the water that will sterilize is stored in second retention basin 51.
In addition, in order to improve disinfection efficiency, a small amount of hydrogen peroxide is added in the water of first retention basin 20.The concentration of hydrogen peroxide can change according to the volume of water, and is preferably 25-50mg/L, wherein because when high density is used hydrogen peroxide economy and stable aspect possible problem preferably use minimum hydrogen peroxide.As shown in Figure 8, when using the hydrogen peroxide treatment water of different concns, disinfection efficiency increases with the concentration of hydrogen peroxide in the water, thereby has shortened the required time of water sterilization.
As shown in Figure 9, the disinfection efficiency that wherein will add hydrogen peroxide and not be exposed to UV is compared with the disinfection efficiency that is exposed to UV, the proof hydrogen peroxide is the microorganism in the passivation water effectively separately, yet by obtaining high disinfection efficiency with hydrogen peroxide together with being exposed to ultraviolet rays.
In addition, owing to use inlet pipe 30 and air pump 31 can obtain much higher disinfection efficiency by the amount that increases dissolved oxygen in water.When air during by inlet pipe 30 lead-in light catalyticreactors 10, has been increased the amount of the dissolved oxygen in the water from air pump 31, cause the formation of warm current and therefore increase contacting of water pollutant and OH free radical.The volume of air of injecting the photo catalysis reactor that uses in the present invention is 30L/min, and power is big as much as possible in the operation of not negative impact photo catalysis reactor for wherein preferred air pump.
As shown in Figure 7, in the time of in air lead-in light catalyticreactor, be higher than disinfection efficiency when not using air to carry out disinfection at the disinfection efficiency of starting stage water.According to embodiments of the invention, during first is 1 minute, when injecting or not injecting air, observes sterilizing rate and be respectively 95% or 90.6%.This result is because the air that imports produces the fact that therefore warm current has also increased the level of dissolved oxygen, and it causes the output of OH free radical to increase and therefore more effective sterilization.
As among following table 1 and Figure 10 significantly, be stable with the water of hydrogen peroxide treatment.Table 1 shows the influence of hydrogen peroxide to the rudiment of beans.
[table 1]
| Unit (%) | H 2O 2Concentration (mg/L) | |||||
| My | 0 | 10 | 50 | 100 | 500 | 1000 |
| 1 | 71.67 | 20.00 | 53.33 | 60.00 | 78.33 | 50.00 |
| 2 | 90.00 | 86.67 | 76.67 | 86.67 | 93.33 | 95.00 |
| 3 | 91.67 | 88.33 | 80.00 | 88.33 | 93.33 | 95.00 |
As in the table 1 significantly, germination rate slightly reduces under the concentration of the hydrogen peroxide of 50mg/L, but pass by recovery in time.As tangible among Figure 10, the length overall of bean sprouts increases with the concentration of hydrogen peroxide.The length overall of bean sprouts enlarges markedly under the concentration of the hydrogen peroxide of 500mg/L, and wherein significance level is 5%.There is not significant difference in hypocotylar length between the bean sprouts of growing in not with hydrogen peroxide treatment or the water with the hydrogen peroxide treatment of 100mg/L, but under the hydrogen peroxide of 500mg/L, hypocotylar length enlarges markedly.In addition, the length of bean sprouts root increases with the adding of hydrogen peroxide.There is not significant difference in hypocotylar thickness between usefulness or the bean sprouts without hydrogen peroxide treatment.These presentation of results are stable with the water of hydrogen peroxide treatment.
When the volume of the water of handling doubles, be used for the device 100 of water sterilization, it comprises the photo catalysis reactor 10 of the porous bead 11 that contains fixed photocatalyst, shown in Figure 11 a and 11b, also shown excellent disinfection efficiency, wherein initial disinfection efficiency is lower a little, but recovers soon.In addition, use the several photo catalysis reactors 10 that are arranged in parallel to realize the processing of big water gaging.
Combine reference the following example with accompanying drawing and will explain the present invention in more detail.Yet, provide the following example just in order to demonstrate the invention, the present invention is not limited to them.
＜embodiment 1〉method of using photo catalysis reactor to carry out water sterilization
Use various reactors to determine the top condition of water sterilization, top condition is as follows.Use has the photo catalysis reactor 10 of 720mm length and 200mm diameter, and diameter is the fixedly TiO of 8mm
2Porous bead 11 and in the UV-lamp 12 of the maximal ultraviolet light of 254nm place emission 39W, add the hydrogen peroxide of 0-75mg/L and inject air with the speed of 30L/min by inlet pipe 30 and carry out water sterilization.In all experiments of the present invention and comparing embodiment, by collecting sample at regular intervals, the serial dilution sample is coated in the sample of the final dilution of 100 μ l and allows bacterium and fungi growth on the solid medium and count the bacterium colony of growing then and assess disinfection efficiency on substratum.
＜EXPERIMENTAL EXAMPLE 1〉according to the mensuration of each UV-lamp intestinal bacteria viability of diameter of photo catalysis reactor
In order to measure the optimum size of the photo catalysis reactor that is used to obtain each UV-lamp maximal disinfection efficient, a UV-lamp 12, diameter be installed therein be 55,80 or the photo catalysis reactor 10 of 110mm in the inhibition level of research intestinal bacteria growth.
At fixing TiO
2Porous bead add in each photo catalysis reactor 10 after, comprise colibacillary damping fluid and in being exposed to ultraviolet photo catalysis reactor 10, circulated 15 minutes.The disinfection efficiency that obtains provides among table 2 and Fig. 6 a and the 6b below.
[table 2]
| Colibacillary number alive (cell/ml) | 0min | 1min | 15min |
| 55mm | 7.1×10 3 | 375 | 13 |
| 80mm | 7.3×10 3 | 823 | 21 |
| 110mm | 7.1×10 3 | 3.1×10 3 | 201 |
Shown in table 2 and Fig. 6 a and 6b, be in the photo catalysis reactor 10 of 55mm at diameter, colibacillary initial cell number (7.1 * 10 behind 1min
3Individual cell/ml) be reduced to 375 cell/ml was reduced to 13 cell/ml after 15 minutes, it shows 95% and 99.8% germ-killing efficiency respectively.At diameter is in the photo catalysis reactor 10 of 80mm, colibacillary initial cell number (7.3 * 10 behind 1min
3Individual cell/ml) is reduced to 823 cell/ml, after 15 minutes, be reduced to 21 cell/ml, it shows 88.6% and 99.7% germ-killing efficiency respectively, wherein initial fungicidal activity is lower than the fungicidal activity when using diameter as the photo catalysis reactor of 55mm, is the similar level of photo catalysis reactor of 55mm but return to behind 15min to diameter.Yet, when using diameter as the photo catalysis reactor of 110mm, colibacillary initial cell number (7.1 * 10 behind 1min
3Individual cell/ml) be reduced to 3.1 * 10
3Individual cell/ml was reduced to 201 cell/ml after 15 minutes, show 57.5% and 97.2% germ-killing efficiency respectively, its germ-killing efficiency when using diameter as the photo catalysis reactor of 55mm and 80mm.These results show that diameter provides high disinfection efficiency for the photo catalysis reactor of 55mm and 80mm, provide significantly low disinfection efficiency yet diameter is the photo catalysis reactor of 110mm.Therefore, the optimal size of each UV-lamp 12 photo catalysis reactor is that diameter is 55mm-80mm.
＜EXPERIMENTAL EXAMPLE 2〉injection of air uses air pump 31 with the speed of 30L/min air to be injected photo catalysis reactor 10 by inlet pipe 30 to the influence of intestinal bacteria passivation, study colibacillary viability 15min, and compare with the situation of not injecting air.The result provides in following table 3 and Fig. 7 a and 7b.
[table 3]
| Colibacillary number alive (cell/ml) | 0min | 1min | 15min |
| Do not inject air | 7.1×10 3 | 668 | 70 |
| Inject air | 7.1×10 3 | 357 | 13 |
Shown in table 3 and Fig. 7 a and 7b, when not injecting air, colibacillary initial cell number (7.1 * 10 behind 1min
3Individual cell/ml) be reduced to 668 cell/ml shows 90.6% germ-killing efficiency, is reduced to 70 cell/ml after 15 minutes.On the contrary, when injecting air, colibacillary initial cell number (7.1 * 10 behind 1min
3Individual cell/ml) be reduced to 357 cell/ml shows 95% germ-killing efficiency, is reduced to 13 cell/ml after 15 minutes.The disinfection efficiency of discovery when importing air is higher than the disinfection efficiency when not importing air.Think that this result produces warm current because the water of the photo catalysis reactor 10 of light-catalyzed reaction takes place the air that injects therein, therefore the OH free radical is more effectively reacted, and increase the amount of dissolved oxygen and produce therefore that the fact of OH free radical causes.
＜EXPERIMENTAL EXAMPLE 3〉H
2O
2Injection to the influence of intestinal bacteria growths
With hydrogen peroxide with 10,15,20 and the amount of 25mg/L add in the water of photo catalysis reactor 10, use air pump 31 to add air with the speed of 30L/min, assess colibacillary viability 15min.The result provides in following table 4 and Fig. 8.
[table 4]
| Colibacillary number alive (cell/ml) | 0min | 1min | 15min |
| Do not add H 2O 2 | 7.3×10 3 | 267 | 13 |
| H 2O 2，10mg/L | 7.5×10 3 | 242 | 14 |
| H 2O 2，15mg/L | 9.2×10 3 | 203 | 5 |
| H 2O 2，20mg/L | 8.5×10 3 | 157 | 0 |
| H 2O 2，25mg/L | 8.5×10 3 | 82 | Behind |
As table 4 and shown in Figure 8, when not adding hydrogen peroxide, colibacillary initial cell number (7.3 * 10 behind 1min
3Individual cell/ml) be reduced to 267 cell/ml was reduced to 13 cell/ml after 15 minutes, it shows 96% and 99.8% germ-killing efficiency respectively.When the amount with 10mg/L adds hydrogen peroxide, colibacillary initial cell number (7.5 * 10 behind 1min
3Individual cell/ml) is reduced to 242 cell/ml, shows 96.7% germ-killing efficiency, and height when not adding hydrogen peroxide behind 15min, shows 99.8% germ-killing efficiency a little, and is similar when not adding hydrogen peroxide.When the amount with 15mg/L adds hydrogen peroxide, colibacillary initial cell number (9.2 * 10 behind 1min
3Individual cell/ml) be reduced to 203 cell/ml shows 97.8% germ-killing efficiency.When the amount with 20mg/L adds hydrogen peroxide, colibacillary initial cell number (8.5 * 10 behind 1min
3Individual cell/ml) is reduced to 157 cell/ml, shows 98% germ-killing efficiency, and hour shows germ-killing efficiency completely behind 15min.When the amount with 25mg/L adds hydrogen peroxide, colibacillary initial cell number (8.5 * 10 behind 1min
3Individual cell/ml) be reduced to 82 cell/ml shows 99% germ-killing efficiency, and show germ-killing efficiency completely behind 10min.The high disinfection efficiency of these presentation of results is realized by adding a spot of hydrogen peroxide.
＜EXPERIMENTAL EXAMPLE 4〉mensuration of disinfection efficiency when the volume of the water of handling doubles
The amount of the water that will handle in photo catalysis reactor 10 doubles, simultaneously with 20,25,30 and the amount of 50mg/L add hydrogen peroxide, and use air pump 31 to inject air with the speed of 30L/min, assess colibacillary viability 15min.The result below table 5 and Figure 11 in provide.
[table 5]
| The number of viable cell | 0min | 1min | 2min | 5min | 15min |
| (cell/ml) | |||||
| Do not add H 2O 2 | 3.2×10 4 | 1.5×10 4 | 1.2×10 4 | 1.8×10 3 | 37 |
| H 2O 2，20mg/L | 3.8×10 4 | 1.1×10 4 | 7.0×10 3 | 1.8×10 3 | 15 |
| H 2O 2，25mg/L | 3.1×10 4 | 2.2×10 4 | 1.5×10 3 | 2×10 2 | 4 |
| H 2O 2，30mg/L | 3.5×10 4 | 1.9×10 4 | 1.0×10 3 | 82 | 2 |
| H 2O 2，50mg/L | 3.4×10 4 | 1.1×10 4 | 8.5×10 3 | 13 | 1 |
As table 5 and shown in Figure 11, when not adding hydrogen peroxide, colibacillary initial cell number (3.2 * 10 behind 1min
4Individual cell/ml) be reduced to 1.5 * 10
4Individual cell/ml is after 2 minutes 1.2 * 10
4Individual cell/ml is after 5 minutes 1.8 * 10
3Individual cell/ml and after 15 minutes 37 cell/ml, it shows 51%, 62.3%, 94.3% and 99.8% germ-killing efficiency respectively.When the amount with 20mg/L adds hydrogen peroxide, colibacillary initial cell number (3.8 * 10 behind 1min
4Individual cell/ml) be reduced to 1.1 * 10
4Individual cell/ml is after 2 minutes 7.0 * 10
3Individual cell/ml is after 5 minutes 1.8 * 10
3Individual cell/ml and after 15 minutes 15 cell/ml, respectively passivation 69.3%, 81.8%, 95.3% and 99.9% Bacillus coli cells.When the amount with 25mg/L adds hydrogen peroxide, colibacillary initial cell number (3.1 * 10 behind 1min
4Individual cell/ml) be reduced to 2.2 * 10
4Individual cell/ml is after 2 minutes 1.5 * 10
3Individual cell/ml and after 15 minutes 4 cell/ml, it shows 92.8%, 95.2% and 99.98% germ-killing efficiency respectively.When the amount with 30mg/L adds hydrogen peroxide, colibacillary initial cell number (3.5 * 10 behind 1min
4Individual cell/ml) be reduced to 1.9 * 10
4Individual cell/ml, 82 cell/ml after 5 minutes and after 15 minutes 2 cell/ml, it shows 94.4%, 99.7% and 99.99% germ-killing efficiency respectively.In addition, when the amount with 50mg/L adds hydrogen peroxide, colibacillary initial cell number (3.4 * 10 behind 1min
4Individual cell/ml) be reduced to 1.1 * 10
4Individual cell/ml, 13 cell/ml after 5 minutes and after 15 minutes 1 cell/ml, it shows 96.6%, 99.96% and 99.99% germ-killing efficiency respectively.
＜EXPERIMENTAL EXAMPLE 5〉to the mensuration of the disinfection efficiency of the water bacterium that is used for the beans rudiment
In this test, replace comprising colibacillary damping fluid, use the actual water that is used for the beans rudiment, and be evaluated at the disinfection efficiency in the water.Air is injected photo catalysis reactor 10 with the speed of 30L/min, add hydrogen peroxide with the different amounts of 75mg/ml with 25,50.The viability 90min of bacterium in the assessment water.The result below table 6 and Figure 12 a and Figure 12 b in provide.
[table 6]
| Disinfection efficiency | 1min | 15min | 30min | 90min |
| Do not add H 2O 2 | 82.9％ | 99.7％ | 99.1％ | 99.5％ |
| H 2O 2，25mg/L | 82.6％ | 99.4％ | 99.5％ | 99.9％ |
| H 2O 2，50mg/L | 88.2％ | 99.8％ | 99.9％ | 99.99％ |
| H 2O 2，75mg/L | 91.2％ | 99.8％ | 99.99％ | Sterilization fully |
Be used for 4 hours water of beans rudiment and comprise 4.0 * 10
4The bacterium of individual cell/ml.Shown in table 6 and Figure 12 a and 12b, when not adding hydrogen peroxide, the initial number of the bacterium that lives is reduced to 6.8 * 10 behind 1min
3Individual cell/ml, 123 cell/ml show 82.9% and 99.7% germ-killing efficiency respectively after 15 minutes.The number of bacteria of living increases to 343 cell/ml behind 30min, but is reduced to 220 cell/ml behind 90min again, shows 99.5% germ-killing efficiency.When the amount with 25mg/L adds hydrogen peroxide, discovery is 1,15,30 and 90min after germ-killing efficiency be respectively 82.6%, 99.4%, 99.5% and 99.9%, wherein at the germ-killing efficiency of starting stage a shade below the germ-killing efficiency when not adding hydrogen peroxide, but behind 90min, it increases to the level that is higher than when not adding hydrogen peroxide.In addition, during sterilizing process, do not observe reducing of disinfection efficiency, although when not adding hydrogen peroxide, observe this phenomenon.
But when adding hydrogen peroxide with the amount of 50mg/L, find 1,15 and 90min after germ-killing efficiency be respectively 88.2%, 99.8% and 99.99%.When the amount with 75mg/L add fashionable, hydrogen peroxide 1,15 and 30min after show 91.2%, 99.8% and 99.99% fungicidal activity respectively, behind 90min, observe complete passivation to bacterium.
Discovery to the disinfection efficiencies of all bacteriums a shade below separately to colibacillary disinfection efficiency, and the sum of the bacterium that lives is higher than the colibacillary sum of independent work a little.Yet these results are because underlying cause causes.That is, in the damping fluid that does not comprise nutrition, there is restriction in colibacillary growth, yet because existence is from the organic acid of beans in water, bacterium may breed continuously.In addition, when adding hydrogen peroxide, observe the disinfection efficiency much higher to bacterium with the amount that is higher than 50mg/L.
＜EXPERIMENTAL EXAMPLE 6〉to the mensuration of the disinfection efficiency of the water fungi that is used for the beans rudiment
The water that uses the method identical with EXPERIMENTAL EXAMPLE 5 to be evaluated to be used for the beans rudiment is to the Fungicidally active of fungi.The result below table 7 and Figure 13 a and Figure 13 b in provide.
[table 7]
| Disinfection efficiency | 1min | 15min | 90min |
| Do not add H 2O 2 | 69.3％ | 99.6％ | 99.7％ |
| H 2O 2，25mg/L | 71.1％ | 99.5％ | 99.88％ |
| H 2O 2，50mg/L | 90％ | Sterilization fully | - |
| H 2O 2，75mg/L | 93.7％ | Sterilization fully behind the 4min | |
The water that uses in beans rudiment 4 hours comprises 1.0 * 10
4The fungi of individual cell/ml.As table 7 and shown in Figure 13, when not adding hydrogen peroxide, fungicidal efficient is respectively 69.3%, 99.6% and 99.7% after 1,15 and 90 minute.When the amount with 25mg/L adds fashionablely, hydrogen peroxide showed 71.1%, 99.5% and 99.88% fungicidal efficient respectively after 1,15 and 90 minute.When the amount with 50mg/L adds fashionablely, hydrogen peroxide showed 90% and 99.8% fungicidal efficient respectively after 1 and 10 minute, and behind 15min the fungi in the passivation water fully.When the amount with 75mg/L adds hydrogen peroxide, find that fungicidal efficient is 93.7% behind 1min, and behind 4min, do not observe fungi alive.
＜comparing embodiment 1〉using fixedly TiO
2Porous bead or the disinfection efficiency during granulated glass sphere measure
In this test, with the white mica of high porosity and granulated glass sphere as TiO
2The fixed carrier substance.For fixing TiO
2Porous bead, i.e. fixing TiO
2The white mica pearl disinfection efficiency with the coating TiO
2Granulated glass sphere disinfection efficiency relatively, TiO wherein
2As photocatalyst, using fixedly TiO
2Porous bead or granulated glass sphere fill after the photo catalysis reactor 10, add air with the speed of 30L/min and carry out under the ultraviolet ray colibacillary sterilization 15min being exposed to, and assess colibacillary viability.The result below table 8 and Fig. 5 a and 5b in provide.
[table 8]
| Viable count (cell/ml) | 0min | 1min | 15min |
| Porous bead | 7.2×10 3 | 370 | 1 |
| Granulated glass sphere | 7.1×10 3 | 357 | 13 |
Shown in table 8 and Fig. 5 a and 5b, fixing TiO wherein
2The white mica pearl disinfection efficiency with the coating TiO
2The disinfection efficiency of granulated glass sphere compare, when using coating TiO
2Granulated glass sphere the time, colibacillary initial cell number (7.1 * 10
4Individual cell/ml) be reduced to 357 cell/ml behind the 1min and behind 15min 13 cell/ml, show 95% and 99.8% germ-killing efficiency respectively.
When using fixedly TiO
2The white mica pearl time, the number of bacteria of living behind 1min from 7.2 * 10
3Individual cell/ml is reduced to 370 cell/ml, and 1 cell/ml shows 95% and 99.9% germ-killing efficiency respectively behind 15min, and fixedly TiO is described
2The disinfection efficiency of white mica pearl be higher than coating TiO a little
2Granulated glass sphere.
In addition, the TiO of discovery on granulated glass sphere
2By solid stream of water from the surface of granulated glass sphere gradually desorb get off, therefore require to use TiO
2The new application step of exhausted granulated glass sphere.On the contrary, compare TiO with granulated glass sphere
2Photocatalyst is easier to be impregnated among the porous bead, as has the white mica powder of high porosity.And, owing at high temperature handle fixedly TiO
2Porous bead, do not observe TiO
2Desorption from porous bead.
＜comparing embodiment 2〉adding H
2O
2And the mensuration of disinfection efficiency when not being exposed to ultraviolet ray
In order relatively to add hydrogen peroxide (H
2O
2) and expose to the open air or the disinfection efficiency when not being exposed to ultraviolet ray, the amount of hydrogen peroxide with 25mg/L added in the entry, and assess colibacillary viability.The result provides in Fig. 9.
As shown in Figure 9, add 25mg/L H down when being exposed to ultraviolet ray at the same time
2O
2Behind 5min, do not detect intestinal bacteria alive when carrying out disinfection.On the contrary, when not providing ultraviolet ray, even find that germ-killing efficiency only is 51% behind 15min.The fabulous disinfection efficiency of these presentation of results is not only to realize by hydrogen peroxide, but adds down by being exposed to ultraviolet ray at the same time that hydrogen peroxide realizes.
Industrial usability
As mentioned above, can shorten the required time of water sterilization according to the device for water sterilization of the present invention, and improve disinfection efficiency to add hydrogen peroxide and air. In addition, therefore small size ground preparation facilities allows in narrow place it to be installed as required. In addition, this device is removed easily, is easy to thus its cleaning. Therefore, the device that is used for water sterilization passivation or destroy the microorganism of water and organic pollution aspect very useful.
Claims (11)
1. one kind is used for the device of water sterilization by light-catalyzed reaction, and it comprises:
Store first retention basin of pending water;
Comprise the porous bead of fixed photocatalyst and be equipped with 1) water-in, 2) water outlet, 3) UV-lamp, its outside such mode that is electrode with described UV-lamp reaches described photo catalysis reactor is installed in the inside and 4 of photo catalysis reactor) photo catalysis reactor of inlet pipe;
Be connected the working shaft between described first retention basin and the described photo catalysis reactor;
Air is imported the air pump of described photo catalysis reactor by inlet pipe; With
Second retention basin of the water of the sterilization that storage is handled from described photo catalysis reactor,
Wherein the porous bead of fixed photocatalyst is that the photoactivation agent is coated with its surface by the baking white mica, the white mica of the described coating of thermal treatment and making then, and diameter is 6-10mm.
2. according to the device of claim 1, each in wherein said water-in and the described water outlet is equipped with strainer and flows out from described photo catalysis reactor with the porous bead that prevents described fixed photocatalyst.
3. according to the device of claim 1, wherein said water-in and described water outlet are installed in the upper and lower of described photo catalysis reactor respectively, and the diagonal angle is placed to increase the residence time of water in described photo catalysis reactor inside each other.
4. according to the device of claim 1, wherein said photocatalyst is TiO
2
5. according to the device of claim 1, wherein said UV-lamp is parallel with described photo catalysis reactor at regular intervals.
6. according to the device of claim 1, wherein described inlet pipe is installed in the bottom of described photo catalysis reactor and perforation subtly at regular intervals.
7. according to the device of claim 1, wherein said photo catalysis reactor has O-shape ring is clipped in sealed structure between internal framework and the outside framework.
8. according to the device of claim 1, wherein said photo catalysis reactor is equipped Packed transparent acrylate window to allow the detect by an unaided eye inside of described reactor of user.
9. according to the device of claim 1, wherein design described photo catalysis reactor so that two or more reactors in parallel.
10. a device that uses claim 1 is used for the method for water sterilization by light-catalyzed reaction, and it comprises step: hydrogen peroxide is added in the polluted water;
The polluted water that is added with hydrogen peroxide is imported the photo catalysis reactor of the porous bead that comprises fixed photocatalyst;
Air is injected described photo catalysis reactor; With
Ultraviolet ray is put among the described photo catalysis reactor.
11., wherein the amount of described hydrogen peroxide with 25-50mg/L is added in the water according to the method for claim 10.
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|---|---|---|---|
| KR2001/47216 | 2001-08-06 | ||
| KR10-2001-0047216A KR100439195B1 (en) | 2001-08-06 | 2001-08-06 | Method for killing of microorganisms in the water by UV-TiO2 photocatalytic reaction and reactor for killing of microorganisms |
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| CN114890498B (en) * | 2021-07-01 | 2023-09-19 | 南京诺兰环境工程技术有限公司 | Operation method of circulating photocatalytic device |
| DE102022113128A1 (en) * | 2022-05-24 | 2023-11-30 | Zahnen Technik Gmbh | Water treatment system for destroying organic pollutants in water and use of a water treatment system |
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| EP0634363B1 (en) * | 1993-07-12 | 1998-12-16 | Ishihara Sangyo Kaisha, Ltd. | Process for preparing a photocatalyst and process for purifying water |
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| KR100205443B1 (en) * | 1996-12-20 | 1999-07-01 | 남창우 | Apparatus for treating waste water using photocatalyst |
| JPH11156377A (en) * | 1997-11-26 | 1999-06-15 | Meidensha Corp | Ozone decomposing method and apparatus therefor |
| JPH11221581A (en) * | 1998-02-04 | 1999-08-17 | Aqua Eco Kyodo Kumiai | Oxidation decomposition treatment apparatus |
| EP0997439B1 (en) * | 1998-09-08 | 2009-03-04 | Kabushiki Kaisha Meidensha | Method for decomposing bromic acid by photocatalyst |
| KR100297928B1 (en) * | 1999-03-09 | 2001-09-22 | 이정형 | Method of nitrogen removal in wastewater with photocatalytic technology |
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| KR100334306B1 (en) * | 1999-12-31 | 2002-05-03 | 천상석 | Ozon using low temperature storehouse |
| KR20010008265A (en) * | 2000-11-20 | 2001-02-05 | 김현용 | Energy saving photocatalysis water treatment system using solar light/UV/photocatalyst |
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2001
- 2001-08-06 KR KR10-2001-0047216A patent/KR100439195B1/en not_active IP Right Cessation
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2002
- 2002-08-06 CN CNB028154770A patent/CN1301917C/en not_active Expired - Fee Related
- 2002-08-06 WO PCT/KR2002/001495 patent/WO2003014030A1/en not_active Application Discontinuation
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07148434A (en) * | 1993-07-12 | 1995-06-13 | Ishihara Sangyo Kaisha Ltd | Photocatalyst and water cleaning method using the same |
| JPH10174983A (en) * | 1996-10-15 | 1998-06-30 | Meidensha Corp | Accelerated oxidation treatment apparatus using ozone and photocatalyst |
| KR100242666B1 (en) * | 1997-07-07 | 2000-02-01 | 유성용 | Water purifying plant |
| JP2000079387A (en) * | 1998-09-08 | 2000-03-21 | Meidensha Corp | Method and apparatus for decomposing bromic acid by utilizing photocatalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1538939A (en) | 2004-10-20 |
| KR100439195B1 (en) | 2004-07-07 |
| KR20030012956A (en) | 2003-02-14 |
| WO2003014030A1 (en) | 2003-02-20 |
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