Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy

The effect of glutaraldehyde, a commercial biocide widely used in paper and pulp industry, on the performance of laboratory-scale rotating biological contactors (RBCs) as well as biocide efficacy was studied. Biofilms were established on the RBCs and then exposed to 0 - 180 ppm glutaraldehyde at a d...

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Autores principales:	Laopaiboon,Lakkana, Phukoetphim,Niphaphat, Laopaiboon,Pattana
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2006
Materias:	acclimation aldehyde biocide biofilm RBC wastewater treatment
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400003
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spelling	oai:scielo:S0717-345820060004000032007-01-12Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacyLaopaiboon,LakkanaPhukoetphim,NiphaphatLaopaiboon,Pattana acclimation aldehyde biocide biofilm RBC wastewater treatment The effect of glutaraldehyde, a commercial biocide widely used in paper and pulp industry, on the performance of laboratory-scale rotating biological contactors (RBCs) as well as biocide efficacy was studied. Biofilms were established on the RBCs and then exposed to 0 - 180 ppm glutaraldehyde at a dilution rate of 1.60 h-1. The results showed that the biofilms became acclimated to glutaraldehyde and eventually could degrade it. Acclimation to the biocide took longer at the higher biocide concentrations. The degree of biocide degradation and chemical oxygen demand (COD) removal depended on acclimation period, the presence of other organic matters and the amount of mineral salts available. Glutaraldehyde at up to 80 ppm had no effect on treatment efficiency and populations of biofilms and planktonic phase of the system whereas glutaraldehyde at 180 ppm caused a progressive decline in all measured values. However, no glutaraldehyde concentration used in the study was sufficiently high to kill microorganisms in the RBC system. The presence of biofilm provided additional resistance to glutaraldehyde to bacteria because the biocide had to penetrate through biofilm to reach bacteria. The increased resistance of bacteria to glutaraldehyde due to acclimation should be considered in biocide applications.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.9 n.4 20062006-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400003en
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	acclimation aldehyde biocide biofilm RBC wastewater treatment
spellingShingle	acclimation aldehyde biocide biofilm RBC wastewater treatment Laopaiboon,Lakkana Phukoetphim,Niphaphat Laopaiboon,Pattana Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy
description	The effect of glutaraldehyde, a commercial biocide widely used in paper and pulp industry, on the performance of laboratory-scale rotating biological contactors (RBCs) as well as biocide efficacy was studied. Biofilms were established on the RBCs and then exposed to 0 - 180 ppm glutaraldehyde at a dilution rate of 1.60 h-1. The results showed that the biofilms became acclimated to glutaraldehyde and eventually could degrade it. Acclimation to the biocide took longer at the higher biocide concentrations. The degree of biocide degradation and chemical oxygen demand (COD) removal depended on acclimation period, the presence of other organic matters and the amount of mineral salts available. Glutaraldehyde at up to 80 ppm had no effect on treatment efficiency and populations of biofilms and planktonic phase of the system whereas glutaraldehyde at 180 ppm caused a progressive decline in all measured values. However, no glutaraldehyde concentration used in the study was sufficiently high to kill microorganisms in the RBC system. The presence of biofilm provided additional resistance to glutaraldehyde to bacteria because the biocide had to penetrate through biofilm to reach bacteria. The increased resistance of bacteria to glutaraldehyde due to acclimation should be considered in biocide applications.
author	Laopaiboon,Lakkana Phukoetphim,Niphaphat Laopaiboon,Pattana
author_facet	Laopaiboon,Lakkana Phukoetphim,Niphaphat Laopaiboon,Pattana
author_sort	Laopaiboon,Lakkana
title	Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy
title_short	Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy
title_full	Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy
title_fullStr	Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy
title_full_unstemmed	Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy
title_sort	effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000400003
work_keys_str_mv	AT laopaiboonlakkana effectofglutaraldehydebiocideonlaboratoryscalerotatingbiologicalcontactorsandbiocideefficacy AT phukoetphimniphaphat effectofglutaraldehydebiocideonlaboratoryscalerotatingbiologicalcontactorsandbiocideefficacy AT laopaiboonpattana effectofglutaraldehydebiocideonlaboratoryscalerotatingbiologicalcontactorsandbiocideefficacy
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Effect of glutaraldehyde biocide on laboratory-scale rotating biological contactors and biocide efficacy

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