WO2003027021A3 - Fluid treatment apparatus comprising doped semiconductor material - Google Patents

Fluid treatment apparatus comprising doped semiconductor material Download PDF

Info

Publication number
WO2003027021A3
WO2003027021A3 PCT/GB2002/004320 GB0204320W WO03027021A3 WO 2003027021 A3 WO2003027021 A3 WO 2003027021A3 GB 0204320 W GB0204320 W GB 0204320W WO 03027021 A3 WO03027021 A3 WO 03027021A3
Authority
WO
WIPO (PCT)
Prior art keywords
treatment apparatus
fluid treatment
semiconductor material
doped semiconductor
free radicals
Prior art date
Application number
PCT/GB2002/004320
Other languages
French (fr)
Other versions
WO2003027021A2 (en
Inventor
Malcolm Robert Snowball
Original Assignee
Malcolm Robert Snowball
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Malcolm Robert Snowball filed Critical Malcolm Robert Snowball
Priority to AU2002334077A priority Critical patent/AU2002334077A1/en
Publication of WO2003027021A2 publication Critical patent/WO2003027021A2/en
Publication of WO2003027021A3 publication Critical patent/WO2003027021A3/en

Links

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
    • 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
    • C02F1/30—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
    • C02F1/727—Treatment of water, waste water, or sewage by oxidation using pure oxygen or oxygen rich gas
    • 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
    • C02F2201/328—Having flow diverters (baffles)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • 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
    • C02F2305/02—Specific form of oxidant
    • C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

A fluid treatment apparatus comprises a surface (15) which is coated with a photo catalytic oxidising semiconductor doped with a metal. The metal doping increases the life of electron hole pairs which are generated when the photo catalytic oxidising semiconductor is irradiated with light having a wavelength in the UV range. These electron hole pairs produce hydroxyls and oxygen free radicals (22). Hydroxyls and oxygen free radicals (22) are highly reactive and will break down complex molecules and, in the case of micro-organisms, will destroy them by attacking and breaching their cell walls.
PCT/GB2002/004320 2001-09-24 2002-09-24 Fluid treatment apparatus comprising doped semiconductor material WO2003027021A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002334077A AU2002334077A1 (en) 2001-09-24 2002-09-24 Fluid treatment apparatus comprising doped semiconductor material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0122933A GB0122933D0 (en) 2001-09-24 2001-09-24 High efficiency microbiological disinfection and pollution removal system
GB0122933.5 2001-09-24

Publications (2)

Publication Number Publication Date
WO2003027021A2 WO2003027021A2 (en) 2003-04-03
WO2003027021A3 true WO2003027021A3 (en) 2003-06-19

Family

ID=9922575

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/004320 WO2003027021A2 (en) 2001-09-24 2002-09-24 Fluid treatment apparatus comprising doped semiconductor material

Country Status (3)

Country Link
AU (1) AU2002334077A1 (en)
GB (2) GB0122933D0 (en)
WO (1) WO2003027021A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4195499B2 (en) * 2005-10-11 2008-12-10 有限会社Ｋ２Ｒ Photocatalytic reaction water generator
GB2445792A (en) * 2007-01-18 2008-07-23 Malcolm Robert Snowball Photocatalytic fluid treatment
DE102012018995A1 (en) * 2012-09-27 2014-03-27 Klaus Büttner Process for the treatment of a liquid
CN105000626B (en) * 2015-06-26 2017-04-19 中山大学 Method for reinforcing piezoelectric effect to improve organic pollutant degradation efficiency and application thereof
DE102016211920A1 (en) * 2016-06-30 2018-01-04 Skf Marine Gmbh Reactor and process for the treatment of contaminated water
CN108996698A (en) * 2018-07-10 2018-12-14 同济大学 A kind of hydrogen matrix biopolymers palladium reactor being aerated with non-porous hollow tunica fibrosa

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5501801A (en) * 1993-11-30 1996-03-26 Board Of Control Of Michigan Technology University Method and apparatus for destroying organic compounds in fluid
US5932111A (en) * 1994-06-24 1999-08-03 Christensen; Paul A. Photoelectrochemical reactor
US6136186A (en) * 1997-01-31 2000-10-24 Lynntech, Inc. Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant
US6156211A (en) * 1997-01-31 2000-12-05 Lynntech, Inc. Enhanced photocatalytic conversion of methane to methanol using a porous semiconductor membrane
WO2001070396A2 (en) * 2000-03-22 2001-09-27 Speer Samuel E Photolytic and photocatalytic reaction enhancement device
WO2002083570A1 (en) * 2001-04-12 2002-10-24 Carmignani Gary M Apparatus and method for phtocatalytic purification and disinfection of water and ultrapure water

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3772220D1 (en) * 1986-01-22 1991-09-26 Hitachi Ltd METHOD AND DEVICE FOR PHOTOELECTROCATALYTIC REDUCTION OF PRECIOUS METALS IN Nitric Acid Solution.
US4892712A (en) * 1987-09-04 1990-01-09 Nutech Energy Systems Inc. Fluid purification
DE19911738A1 (en) * 1999-03-16 2000-09-28 Fraunhofer Ges Forschung Titanium dioxide photocatalyst doped with Fe · 3 ·· + · ions
GB2356859A (en) * 1999-07-21 2001-06-06 Procter & Gamble Combined photocatalytic and ultrasonic degradation of organic contaminants
JP2001316115A (en) * 2000-03-28 2001-11-13 Degussa Ag Doping-processed titanium dioxide
EP1138632B1 (en) * 2000-03-29 2009-10-14 Evonik Degussa GmbH Doped titanium dioxide

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5501801A (en) * 1993-11-30 1996-03-26 Board Of Control Of Michigan Technology University Method and apparatus for destroying organic compounds in fluid
US5932111A (en) * 1994-06-24 1999-08-03 Christensen; Paul A. Photoelectrochemical reactor
US6136186A (en) * 1997-01-31 2000-10-24 Lynntech, Inc. Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant
US6156211A (en) * 1997-01-31 2000-12-05 Lynntech, Inc. Enhanced photocatalytic conversion of methane to methanol using a porous semiconductor membrane
WO2001070396A2 (en) * 2000-03-22 2001-09-27 Speer Samuel E Photolytic and photocatalytic reaction enhancement device
WO2002083570A1 (en) * 2001-04-12 2002-10-24 Carmignani Gary M Apparatus and method for phtocatalytic purification and disinfection of water and ultrapure water

Also Published As

Publication number Publication date
GB2380994A (en) 2003-04-23
AU2002334077A1 (en) 2003-04-07
GB0122933D0 (en) 2001-11-14
GB0222082D0 (en) 2002-10-30
WO2003027021A2 (en) 2003-04-03

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