CN1872715A - Methdof for treating wastewater through catalysis of plasma Ti02 in liquid phase - Google Patents
Methdof for treating wastewater through catalysis of plasma Ti02 in liquid phase Download PDFInfo
- Publication number
- CN1872715A CN1872715A CN 200610052002 CN200610052002A CN1872715A CN 1872715 A CN1872715 A CN 1872715A CN 200610052002 CN200610052002 CN 200610052002 CN 200610052002 A CN200610052002 A CN 200610052002A CN 1872715 A CN1872715 A CN 1872715A
- Authority
- CN
- China
- Prior art keywords
- wastewater
- plasma
- tio2
- liquid phase
- waste water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 239000002351 wastewater Substances 0.000 title claims abstract description 26
- 239000007791 liquid phase Substances 0.000 title claims abstract description 15
- 238000006555 catalytic reaction Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000005495 cold plasma Effects 0.000 claims abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000003344 environmental pollutant Substances 0.000 claims description 5
- 231100000719 pollutant Toxicity 0.000 claims description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 5
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 abstract description 7
- 238000007254 oxidation reaction Methods 0.000 abstract description 7
- 239000000356 contaminant Substances 0.000 abstract description 3
- 239000008187 granular material Substances 0.000 abstract description 3
- 244000005700 microbiome Species 0.000 abstract description 3
- 230000001699 photocatalysis Effects 0.000 abstract description 3
- 239000003054 catalyst Substances 0.000 abstract description 2
- 230000003612 virological effect Effects 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 231100000331 toxic Toxicity 0.000 abstract 1
- 230000002588 toxic effect Effects 0.000 abstract 1
- 238000004065 wastewater treatment Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 6
- 238000006731 degradation reaction Methods 0.000 description 6
- 239000013543 active substance Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 4
- 150000003254 radicals Chemical class 0.000 description 4
- 230000009931 harmful effect Effects 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 231100000614 poison Toxicity 0.000 description 3
- 230000007096 poisonous effect Effects 0.000 description 3
- WXNZTHHGJRFXKQ-UHFFFAOYSA-N 4-chlorophenol Chemical compound OC1=CC=C(Cl)C=C1 WXNZTHHGJRFXKQ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000002925 chemical effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229940090668 parachlorophenol Drugs 0.000 description 2
- 238000007146 photocatalysis Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
- Catalysts (AREA)
Abstract
This invention discloses a method for treating wastewater with liquid-phase plasma and TiO2 catalyst. The method comprises: (1) utilizing cold plasma generated by high voltage impulse liquid-phase discharging to remove the contaminants in the wastewater; (2) adding anatase-type TiO2 powder or granules to the wastewater to catalyze the wastewater treatment. Solid TiO2 has excellent photocatalytic property, and can absorb UV with wavelength less than 320 nm, excite the separation of the electrons in the conduction band and the holes in the valence band, and generate OH radicals by the strong oxidation of the holes, or directly oxidize the contaminants. The method has such advantages as simple process and low operation cost, and can utilize TiO2 granules repeatedly. The method can be applied to treat toxic and unbiodegradable wastewater and viral microorganisms.
Description
Technical field
The present invention relates to a kind of method of handling waste water, especially liquid phase plasma TiO
2The method for the treatment of wastewater through catalysis of connected.
Background technology
At a large amount of trade effluents that discharged in the present industrial production, it is of a great variety, complicated component, and chemical oxygen demand (COD) (COD) concentration height, biodegradability is poor, and characteristics such as poisonous and harmful adopt conventional materialization or biochemical processing to be difficult to control effectively and to have administered.Therefore, high-level oxidation technology becomes the new technology and the novel method of current processing difficult for biological degradation and poisonous and harmful trade effluent.
High-level oxidation technology utilizes the larger molecular organics (or microorganism) in the various living radicals attack trade effluents, destroys its molecular structure (or cell), thereby organic waste water is purified.But,, cause it further having certain limitation and subject range in the popularization because there are shortcomings such as severe reaction conditions, poor selectivity, cost height in high-level oxidation technology.The disclosed pulse liquid phase plasma power supply unit of CN1673103, utilize liquid phase electricimpulse technology, employing high-voltage pulse power source generation voltage rise time weak point (＜100ns), pulse width is narrow, and (＜200ns) forceful electric power is pressed, thereby can under the situation that does not make the acceleration of ions in the electric field electronics be quickened, thereby produce the high energy unbound electron, form cold plasma, excite the generation active substance in water body, pollutants in waste water is removed in degraded.Have physical influence and chemical effect in this excitation process simultaneously, physical influence can form UV-light and shockwave, and its intensity depends on the energy of discharge; Chemical effect is mainly impelled the formation of active substance, as: OH, O, H
2O
2, O
3Etc. various living radicals, thereby high pressure pulse discharge is handled UV-light, shockwave and living radical that waste water can utilize discharge to form, form multifactorial Synergistic degradation effects such as high-energy electron, ultraviolet ray, ozone, the enhancement process effect is that light harvesting, electricity, chemical oxidation are in the novel water technology of one.
But, in the conventional liquid electro-plasma system degradation of contaminant time longer, energy consumption is bigger, and power supply and electrode are all had great loss.Simultaneously, liquid electricity produces light moment launches, and fully do not absorbed by water body, so that photochemical effect is not fully utilized to the degraded of pollutent, and the photochemical energy utilization ratio is extremely low in this system.
Summary of the invention
The purpose of this invention is to provide and a kind ofly can make full use of the luminous energy that produces in the liquid electricity system, improve pollutants removal rate, reduce the liquid phase plasma TiO of power supply energy consumption
2The method for the treatment of wastewater through catalysis of connected.
Liquid phase plasma TiO of the present invention
2The method for the treatment of wastewater through catalysis of connected, be that the cold plasma that utilizes the high-voltage pulse discharge in water to produce is removed pollutants in waste water, add the titania powder or the particle that contain anatase crystal in processed waste water, the concentration of titanium dioxide in waste water is 10-200mg/L.The optimum concn of titanium dioxide in waste water is 50mg/L.
The inventive method is simple, and is easy and simple to handle, utilizes soild oxide titanium dioxide to have fabulous photocatalysis characteristic, can absorb UV-light less than the 320nm wavelength, excite the electronics of conduction band and separating of valence band hole, utilize the strong oxidation in hole to produce the OH free radical, or the direct oxidation pollutent.The electronics of conduction band has reductibility simultaneously.When handling waste water, on liquid electro-plasma reactor, apply high-voltage pulse, produce the liquid phase cold plasma,, thereby produce more active substances, Synergistic degradation pollutent in conjunction with the photocatalysis performance of titanium dioxide.All improve the active substance productive rate in liquid phase and liquid phase gas phase mixed system, improved processing efficiency to a greater extent, running cost is low, and can reuse titanium dioxide granule.The present invention can apply under single liquid phase, gas phase volatile pollutants and the gas-liquid two-phase mixed solution electrical environment, has improved degradation capability, thereby has improved the generation efficient of the active substance in the water body greatly, strengthens the water treatment effect.The present invention can be used for handling difficult for biological degradation and poisonous and harmful trade effluent and viral micro-organisms and removes purification.
Embodiment
Example 1
Contain the waste water that para-chlorophenol is a pollutent with the inventive method processing, the starting point concentration of pollutent is 100mg/L in the waste water, initial pH:6.5-7.0, specific conductivity: 3.0-6.0.Used high-voltage pulse power source is a 4-37 type high-voltage pulse power source, operating parameter: voltage peak (14.0KV), leading edge of impulse (about 100ns), pulse-repetition: (150Hz).Needle electrode and board-like interelectrode distance are 2mm under the liquid, and amount of oxygen exposes to the sun: 100L/h.Treatment time is 42min.With this understanding, add the titania powder that contains anatase crystal, its concentration in waste water is 50mg/L.
Table 1 has provided example 1 and has added titanium dioxide and the comparison of the liquid electricity system that does not add titanium dioxide to water treatment effect and efficiency.
Table 1
| Pollutent | Titanium deoxide catalyst | Add concentration (mg/L) | Reaction rate constant, K 4-CP，(×10 -3S -1) | Remove efficiency (g/kWh) |
| Para-chlorophenol | TiO 2 | 0 | 1.56 | 0.92 |
| TiO 2 | 50 | 2.81 | 1.66 |
By table 1 as seen, the reaction system that adds titanium dioxide makes reaction digit rate constant (plan first _ order kinetics equation) and removal efficiency (promptly removing 50% o'clock energy expenditure (g/kWh) of starting point concentration) all add TiO than nothing
2System improved 80.4%.
Claims (2)
1. liquid phase plasma TiO
2The method for the treatment of wastewater through catalysis of connected, the cold plasma that utilizes the high-voltage pulse discharge in water to produce is removed pollutants in waste water, it is characterized in that adding in processed waste water titania powder or the particle that contains anatase crystal, the concentration of titanium dioxide in waste water is 10-200mg/L.
2. liquid phase plasma TiO according to claim 1
2The method for the treatment of wastewater through catalysis of connected is characterized in that the concentration of titanium dioxide in waste water is 50mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100520020A CN100371260C (en) | 2006-06-16 | 2006-06-16 | Methdof for treating wastewater through catalysis of plasma Ti02 in liquid phase |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100520020A CN100371260C (en) | 2006-06-16 | 2006-06-16 | Methdof for treating wastewater through catalysis of plasma Ti02 in liquid phase |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1872715A true CN1872715A (en) | 2006-12-06 |
| CN100371260C CN100371260C (en) | 2008-02-27 |
Family
ID=37483344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100520020A Expired - Fee Related CN100371260C (en) | 2006-06-16 | 2006-06-16 | Methdof for treating wastewater through catalysis of plasma Ti02 in liquid phase |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100371260C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053631A (en) * | 2011-12-01 | 2014-09-17 | Beewair公司 | Process for treating effluents in a bed of microbeads by cold plasma and photocatalysis |
| CN104058481A (en) * | 2014-06-30 | 2014-09-24 | 广西大学 | Dielectric barrier discharge plasma-fenton-like-photocatalysis method for degrading organic matter |
| CN104671357A (en) * | 2015-01-26 | 2015-06-03 | 南京大学 | Method for degrading dimethyl phthalate by virtue of cooperation of low-temperature plasma and bismuth tungstate catalyst |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6113779A (en) * | 1998-02-13 | 2000-09-05 | Des Moines Five, Inc. | Electrical water purification apparatus |
| JP2001187390A (en) * | 1999-12-28 | 2001-07-10 | Daido Steel Co Ltd | Process and device for purifying liquid |
| CN2613472Y (en) * | 2003-04-26 | 2004-04-28 | 清华大学 | Hydroxyl free radical-ozone generator of discharge catalyzing by nano titanium dioxide plasma |
| CN2780745Y (en) * | 2005-03-24 | 2006-05-17 | 浙江大学 | Pulsed plasma gas liquid discharge device for waste water treatment |
| CN1323950C (en) * | 2005-03-24 | 2007-07-04 | 浙江大学 | Pulse plasma gas-liquid discharge equipment for waste water treatment |
| CN1300007C (en) * | 2005-03-24 | 2007-02-14 | 浙江大学 | Pulse liquid phase plasma power supply unit for waste water treatment |
-
2006
- 2006-06-16 CN CNB2006100520020A patent/CN100371260C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104053631A (en) * | 2011-12-01 | 2014-09-17 | Beewair公司 | Process for treating effluents in a bed of microbeads by cold plasma and photocatalysis |
| CN104058481A (en) * | 2014-06-30 | 2014-09-24 | 广西大学 | Dielectric barrier discharge plasma-fenton-like-photocatalysis method for degrading organic matter |
| CN104671357A (en) * | 2015-01-26 | 2015-06-03 | 南京大学 | Method for degrading dimethyl phthalate by virtue of cooperation of low-temperature plasma and bismuth tungstate catalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100371260C (en) | 2008-02-27 |
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Granted publication date: 20080227 Termination date: 20130616 |