INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO
Ano de defesa: | 2017 |
---|---|
Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Estadual do Centro-Oeste
|
Programa de Pós-Graduação: |
Programa de Pós-Graduação em Engenharia Sanitária e Ambiental (Mestrado / Associação Ampla com UEPG)
|
Departamento: |
Unicentro::Departamento de Ciências Agrárias e Ambientais
|
País: |
Brasil
|
Palavras-chave em Português: | |
Palavras-chave em Inglês: | |
Área do conhecimento CNPq: | |
Link de acesso: | http://tede.unicentro.br:8080/jspui/handle/jspui/883 |
Resumo: | This study evaluated the efficiency of individual disinfection methods using peracetic acid (PAA), hydrogen peroxide (H2O2) and UV radiation and the combined disinfection methods of PAA/UV and H2O2/UV for final effluent of municipal wastewater treatment plant. It was evaluated the performance of the disinfectants used according to the inactivation efficiency of the indicator microorganisms, E. coli, total coliforms, Clostridium perfringens and coliphages. To the experimental conditions adopted, the concentrations of PAA and H2O2 were 2,0 and 3,0 mg/L and contact time of 10 and 20 minutes, with mean exposure doses ranging from 30,62 to 206,65 mWs.cm² for UV radiation. The PAA/UV and H2O2/UV disinfection consisted of a combination of the times, concentrations and doses of disinfectants adopted in individual methods. The results obtained in the disinfection tests with peracetic acid and hydrogen peroxide did not promoted significant inactivations for any of the indicator microorganisms, under the experimental conditions employed. The UV radiation showed to be more effective in the reduction of all the indicator microorganisms, showing superior results compared to the other disinfectants. The disinfection processes PAA/UV and H2O2/UV showed near inactivations to those obtained by UV radiation method, reaching higher inactivation results for all the indicator microorganisms, these results occurred in isolation for the experimental conditions adopted. Clostridium perfringens was the microorganism that showed higher resistance to inactivation for all disinfectants used. The occurrence of synergism was observed for Escherichia coli, Clostridium perfringens and coliphages, only in the concentrations and times of superior contacts. There was a significant increase of 1 log of inactivation for C. perfringens compared to the results obtained by individual methods, when combined H2O2/UV disinfection method was used. |
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Souza, Jeanette Beber dehttp://lattes.cnpq.br/3539413296260672http://lattes.cnpq.br/1235776750853944KOVALSKI, THAÍS2018-08-01T12:43:10Z2017-08-25KOVALSKI, THAÍS. INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO. 2017. 83 f. Dissertação (Programa de Pós-Graduação em Engenharia Sanitária e Ambiental - Mestrado / Associação Ampla com UEPG) - Universidade Estadual do Centro-Oeste, Irati - PR.http://tede.unicentro.br:8080/jspui/handle/jspui/883This study evaluated the efficiency of individual disinfection methods using peracetic acid (PAA), hydrogen peroxide (H2O2) and UV radiation and the combined disinfection methods of PAA/UV and H2O2/UV for final effluent of municipal wastewater treatment plant. It was evaluated the performance of the disinfectants used according to the inactivation efficiency of the indicator microorganisms, E. coli, total coliforms, Clostridium perfringens and coliphages. To the experimental conditions adopted, the concentrations of PAA and H2O2 were 2,0 and 3,0 mg/L and contact time of 10 and 20 minutes, with mean exposure doses ranging from 30,62 to 206,65 mWs.cm² for UV radiation. The PAA/UV and H2O2/UV disinfection consisted of a combination of the times, concentrations and doses of disinfectants adopted in individual methods. The results obtained in the disinfection tests with peracetic acid and hydrogen peroxide did not promoted significant inactivations for any of the indicator microorganisms, under the experimental conditions employed. The UV radiation showed to be more effective in the reduction of all the indicator microorganisms, showing superior results compared to the other disinfectants. The disinfection processes PAA/UV and H2O2/UV showed near inactivations to those obtained by UV radiation method, reaching higher inactivation results for all the indicator microorganisms, these results occurred in isolation for the experimental conditions adopted. Clostridium perfringens was the microorganism that showed higher resistance to inactivation for all disinfectants used. The occurrence of synergism was observed for Escherichia coli, Clostridium perfringens and coliphages, only in the concentrations and times of superior contacts. There was a significant increase of 1 log of inactivation for C. perfringens compared to the results obtained by individual methods, when combined H2O2/UV disinfection method was used.Neste estudo foi avaliada a eficiência dos métodos individuais de desinfecção empregando ácido peracético (APA), peróxido de hidrogênio (H2O2) e radiação UV e os métodos de desinfecção combinados APA/UV e H2O2/UV para efluente final de Estação de Tratamento de Esgoto municipal. Avaliou-se o desempenho dos desinfetantes empregados em função da eficiência das inativações dos microrganismos indicadores, Escherichia coli, coliformes totais, Clostridium perfringens e colifagos. Para as condições experimentais adotadas, as concentrações de APA e H2O2 foram de 2,0 e 3,0 mg/L e tempos de contato de 10 e 20 minutos, e doses médias de exposição variando de 30,62 a 206,65 mWs.cm² para radiação UV. A desinfecção APA/UV e H2O2/UV consistiu na combinação dos tempos, concentrações e doses de desinfetantes adotados nos métodos individuais. Os resultados obtidos nos ensaios de desinfecção com ácido peracético e peróxido de hidrogênio não promoveram inativações significativas para nenhum dos microrganismos indicadores, nas condições experimentais empregadas. A radiação UV mostrou-se mais efetiva na redução de todos os microrganismos indicadores, apresentando resultados superiores comparados aos demais desinfetantes. Os processos de desinfecção APA/UV e H2O2/UV apresentaram inativações próximas às obtidas pelo método de radiação UV, alcançando resultados de inativações superiores para todos os microrganismos indicadores, estes resultados ocorreram de forma isolada para as condições experimentais adotadas. Clostridium perfringens foi o microrganismo que apresentou maior resistência à inativação para todos os desinfetantes utilizados. A ocorrência de sinergismo foi observada para Escherichia coli, Clostridium perfringens e colifagos, apenas nas concentrações e tempos de contatos superiores. Houve um aumento significativo de 1 log de inativação para Clostridium perfringens quando comparado aos resultados obtidos pelos métodos individuais, quando utilizou-se o método combinado de desinfecção H2O2/UV.Submitted by Fabiano Jucá (fjuca@unicentro.br) on 2018-08-01T12:43:10Z No. of bitstreams: 1 THAÍS KOVALSKI.pdf: 2375734 bytes, checksum: 8ad4805cc0eae34b26ccde8204e28de4 (MD5)Made available in DSpace on 2018-08-01T12:43:10Z (GMT). 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dc.title.por.fl_str_mv |
INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO |
title |
INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO |
spellingShingle |
INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO KOVALSKI, THAÍS processos oxidativos avançados sinergismo radiação UV peróxido de hidrogênio ácido peracético advanced oxidative processes synergism UV radiation hydrogen peroxide peracetic acid ENGENHARIAS ENGENHARIAS::ENGENHARIA SANITARIA |
title_short |
INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO |
title_full |
INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO |
title_fullStr |
INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO |
title_full_unstemmed |
INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO |
title_sort |
INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO |
author |
KOVALSKI, THAÍS |
author_facet |
KOVALSKI, THAÍS |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Souza, Jeanette Beber de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/3539413296260672 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/1235776750853944 |
dc.contributor.author.fl_str_mv |
KOVALSKI, THAÍS |
contributor_str_mv |
Souza, Jeanette Beber de |
dc.subject.por.fl_str_mv |
processos oxidativos avançados sinergismo radiação UV peróxido de hidrogênio ácido peracético |
topic |
processos oxidativos avançados sinergismo radiação UV peróxido de hidrogênio ácido peracético advanced oxidative processes synergism UV radiation hydrogen peroxide peracetic acid ENGENHARIAS ENGENHARIAS::ENGENHARIA SANITARIA |
dc.subject.eng.fl_str_mv |
advanced oxidative processes synergism UV radiation hydrogen peroxide peracetic acid |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS ENGENHARIAS::ENGENHARIA SANITARIA |
description |
This study evaluated the efficiency of individual disinfection methods using peracetic acid (PAA), hydrogen peroxide (H2O2) and UV radiation and the combined disinfection methods of PAA/UV and H2O2/UV for final effluent of municipal wastewater treatment plant. It was evaluated the performance of the disinfectants used according to the inactivation efficiency of the indicator microorganisms, E. coli, total coliforms, Clostridium perfringens and coliphages. To the experimental conditions adopted, the concentrations of PAA and H2O2 were 2,0 and 3,0 mg/L and contact time of 10 and 20 minutes, with mean exposure doses ranging from 30,62 to 206,65 mWs.cm² for UV radiation. The PAA/UV and H2O2/UV disinfection consisted of a combination of the times, concentrations and doses of disinfectants adopted in individual methods. The results obtained in the disinfection tests with peracetic acid and hydrogen peroxide did not promoted significant inactivations for any of the indicator microorganisms, under the experimental conditions employed. The UV radiation showed to be more effective in the reduction of all the indicator microorganisms, showing superior results compared to the other disinfectants. The disinfection processes PAA/UV and H2O2/UV showed near inactivations to those obtained by UV radiation method, reaching higher inactivation results for all the indicator microorganisms, these results occurred in isolation for the experimental conditions adopted. Clostridium perfringens was the microorganism that showed higher resistance to inactivation for all disinfectants used. The occurrence of synergism was observed for Escherichia coli, Clostridium perfringens and coliphages, only in the concentrations and times of superior contacts. There was a significant increase of 1 log of inactivation for C. perfringens compared to the results obtained by individual methods, when combined H2O2/UV disinfection method was used. |
publishDate |
2017 |
dc.date.issued.fl_str_mv |
2017-08-25 |
dc.date.accessioned.fl_str_mv |
2018-08-01T12:43:10Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
dc.identifier.citation.fl_str_mv |
KOVALSKI, THAÍS. INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO. 2017. 83 f. Dissertação (Programa de Pós-Graduação em Engenharia Sanitária e Ambiental - Mestrado / Associação Ampla com UEPG) - Universidade Estadual do Centro-Oeste, Irati - PR. |
dc.identifier.uri.fl_str_mv |
http://tede.unicentro.br:8080/jspui/handle/jspui/883 |
identifier_str_mv |
KOVALSKI, THAÍS. INATIVAÇÃO DE MICRORGANISMOS INDICADORES POR SISTEMAS COMBINADOS DE DESINFECÇÃO. 2017. 83 f. Dissertação (Programa de Pós-Graduação em Engenharia Sanitária e Ambiental - Mestrado / Associação Ampla com UEPG) - Universidade Estadual do Centro-Oeste, Irati - PR. |
url |
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por |
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Brasil |
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Unicentro::Departamento de Ciências Agrárias e Ambientais |
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Universidade Estadual do Centro-Oeste |
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