desinfecção de água de chuva por radiação ultravioleta disinfection of rainwater by ultraviolet radiation
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ID: 194037
2011
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Abstract
O objetivo deste trabalho foi avaliar o tratamento de água de chuva, de duas regiões industriais de Joinville (SC), por radiação ultravioleta. O reator operou em processo contínuo, de modo que cada partícula permanecesse sob radiação por 60 segundos. As amostras de água foram analisadas em termos de coliformes totais, coliformes termotolerantes e bactérias heterotróficas antes do tratamento por ultravioleta, após o tratamento e após tratadas e armazenadas por 24, 48 e 72 horas. Verificou-se a eficiência da desinfecção de água de chuva direta e de telhado por radiação ultravioleta com a inativação de 100% dos coliformes totais e dos coliformes termotolerantes e o não recrescimento desses micro-organismos em amostras tratadas e estocados por até 72 horas, no entanto, bactérias heterotróficas persistiram e foram identificadas após 24, 48 e 72 horas ao tratamento.
The objective of this study was to evaluate the treatment of rainwater in two industrial regions in Joinville (SC, Brazil) by ultraviolet radiation. The reactor was operating in continuous process with each particle remaining under radiation for 60 seconds. The samples were evaluated in terms of total coliforms, fecal coliform and heterotrophic bacteria prior to ultraviolet treatment, after treatment and further treated and stored for 24, 48 and 72 hours. The efficiency of disinfection of direct rainwater and that collected from roofing by ultraviolet radiation was verified with 100% inactivation of total coliforms and fecal coliform and these microorganisms did not reappear in samples treated and stored for up to 72 hours, however, heterotrophic bacteria persisted and were identified after 24, 48 and 72 hours of treatment.
The objective of this study was to evaluate the treatment of rainwater in two industrial regions in Joinville (SC, Brazil) by ultraviolet radiation. The reactor was operating in continuous process with each particle remaining under radiation for 60 seconds. The samples were evaluated in terms of total coliforms, fecal coliform and heterotrophic bacteria prior to ultraviolet treatment, after treatment and further treated and stored for 24, 48 and 72 hours. The efficiency of disinfection of direct rainwater and that collected from roofing by ultraviolet radiation was verified with 100% inactivation of total coliforms and fecal coliform and these microorganisms did not reappear in samples treated and stored for up to 72 hours, however, heterotrophic bacteria persisted and were identified after 24, 48 and 72 hours of treatment.
| Reference Key |
wisbeck2011engenhariadesinfeco
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| Authors | ;Elisabeth Wisbeck;Edgar K Sandri;Andrea L M Soares;Sandra H W Medeiros |
| Journal | ophthalmology and therapy |
| Year | 2011 |
| DOI |
10.1590/S1413-41522011000400004
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