| Registro completo |
| Provedor de dados: |
BABT
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| País: |
Brazil
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| Título: |
Studies on the electrochemical disinfection of water containing Escherichia coli using a Dimensionally Stable Anode
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| Autores: |
Gusmão,Isabel Celeste Caíres Pereira
Moraes,Peterson Bueno
Bidoia,Ederio Dino
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| Data: |
2010-10-01
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| Ano: |
2010
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| Palavras-chave: |
E. coli inactivation
Electrochemical treatment
Electrolysis of microorganisms
Electroxidation process
Bactericidal effect
DSA oxide electrode
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| Resumo: |
The aim of this work was to investigate the disinfectant effect of electrolysis on chlorine-free water, artificially contaminated with Escherichia coli (CCT-1457) and to evaluate the bactericidal activity of electrolysis and kinetic behavior of a single-cell reactor, with a DSA (Dimensionally Stable Anode) electrode to develop a scaled-up system. A high-density E. coli suspension (10(6) CFU mL-1) was electrolyzed in this reactor at 25, 50 and 75 mA cm-2 for up to 60 min, at flow rates of 200 and 500 L h-1. Bacterial survival fell by 98.9% without addition of chlorinated compounds and a power consumption rate not more than 5.60 kWh m-3 at flow rate of 200 L h-1 and 75 mA cm-2. The process produced a germicidal effect that reached this inactivation rate within a relatively short contact time. Also, a solution of electrolyzed 0.08 M Na2SO4 added to the inoculum showed residual bactericidal effect. The efficiency of disinfection was regulated by both the contact time and current density applied, and a kinetic function for the survival rate was developed for the purpose of scaling up.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000500029
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| Editor: |
Instituto de Tecnologia do Paraná - Tecpar
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| Relação: |
10.1590/S1516-89132010000500029
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| Formato: |
text/html
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| Fonte: |
Brazilian Archives of Biology and Technology v.53 n.5 2010
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| Direitos: |
info:eu-repo/semantics/openAccess
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