A wetted wall ultraviolet photoreactor for the disinfection of liquids

Ashton, Robert C.; Killick, E.G.; Shama, Gilbert; Smith, Alan Jay

doi:10.1080/09593338809384641

Cited by 2 publications

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“…Additional studies are being planned to realize the preliminary results presented here on a larger scale. Such work will involve an evaluation of contactor designs previously described by Ashton et al (1988) and Shama (1992).…”

Section: Resultsmentioning

confidence: 99%

Effect of titanium dioxide concentration on the survival of Pseudomonas stutzeri during irradiation with near ultraviolet light

Biguzzi

Shama

1994

Lett Appl Microbiol

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Cells of Pseudomonas stutzeri in suspensions of TiO2 ranging in concentration from 0.5 to 4.0 g l‐1 were irradiated with a blacklight blue u.v. source displaying peak emissivity at approximately 370 mm. Irradiation under these conditions is known to result in the generation of lethal free radicals. During irradiation the suspensions were agitated, using a specially modified laboratory shaker, to ensure efficient exposure of the TiO2. A u.v. radiation dose of 175 kJ m‐2 resulted in cell fractional survival ranging from 5.5 times 10‐5, at the lowest TiO2 concentration, to 1.0 times 10‐6, at the highest TiO2 concentration. The advantages of contactors employing TiO2 suspensions are briefly compared to immobilized TiO2 systems.

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Section: Resultsmentioning

confidence: 99%

Effect of titanium dioxide concentration on the survival of Pseudomonas stutzeri during irradiation with near ultraviolet light

Biguzzi

Shama

1994

Lett Appl Microbiol

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Ultraviolet irradiation apparatus for disinfecting liquids of high ultraviolet absorptivities

Shama

1992

Lett Appl Microbiol

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A nozzle was used to generate freely supported totally enclosed thin liquid films, known as ‘liquid bells’, from suspensions of Escherichia coli in water and humic acid solutions. Disinfection was achieved by continuously recirculating the liquids to the nozzle and irradiating the bells generated with ultraviolet light. The absorptivities at 254 nm of the liquids treated ranged from 0.18 to 4.0 and after 30 min treatment E. coli viability, expressed in terms of surviving fractions, was reduced to 1.88 times 10‐5 and 1.84 times 10‐4 respectively.

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A wetted wall ultraviolet photoreactor for the disinfection of liquids

Cited by 2 publications

References 1 publication

Effect of titanium dioxide concentration on the survival of Pseudomonas stutzeri during irradiation with near ultraviolet light

Effect of titanium dioxide concentration on the survival of Pseudomonas stutzeri during irradiation with near ultraviolet light

Ultraviolet irradiation apparatus for disinfecting liquids of high ultraviolet absorptivities

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