Monitoring and modeling 4-chlorophenol biodegradation kinetics by phenol-acclimated activated sludge by using open respirometry

The aim of this study was to analyze the mechanisms, stoichiometry, and stability of 4-chlorophenol (4CP) biodegradation kinetics by phenol-acclimated activated sludge using open respirometry. While the removal of 4CP was higher than 98%, the removal of chemical oxygen demand (COD) ranged between 69...

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Detalles Bibliográficos
Autores principales: Lobo, Cintia Cecilia, Bértola, Nora Cristina, Contreras, Edgardo Martín, Zaritzky, Noemí Elisabet
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Ciencias Exactas
Acclimated activated sludge
4-Chlorophenol
Respirometry
Biodegradation
Oxidation coefficient
Mathematical model
Kinetics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/141356
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-141356
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Acclimated activated sludge
4-Chlorophenol
Respirometry
Biodegradation
Oxidation coefficient
Mathematical model
Kinetics
spellingShingle Ciencias Exactas
Acclimated activated sludge
4-Chlorophenol
Respirometry
Biodegradation
Oxidation coefficient
Mathematical model
Kinetics
Lobo, Cintia Cecilia
Bértola, Nora Cristina
Contreras, Edgardo Martín
Zaritzky, Noemí Elisabet
Monitoring and modeling 4-chlorophenol biodegradation kinetics by phenol-acclimated activated sludge by using open respirometry
topic_facet Ciencias Exactas
Acclimated activated sludge
4-Chlorophenol
Respirometry
Biodegradation
Oxidation coefficient
Mathematical model
Kinetics
description The aim of this study was to analyze the mechanisms, stoichiometry, and stability of 4-chlorophenol (4CP) biodegradation kinetics by phenol-acclimated activated sludge using open respirometry. While the removal of 4CP was higher than 98%, the removal of chemical oxygen demand (COD) ranged between 69 and 79% due to the accumulation of an intermediate metabolite. The value obtained from respirometric profiles for the stoichiometric ratio of O2 to 4CP (YO2/4CP) was 1.95 ± 0.04 mol of oxygen consumed per mol of 4CP removed. This YO2/4CP value reflected the action of the oxygenases responsible for the first steps of the aerobic oxidation of 4CP. The 4CP degradation activity decreased noticeably when successive pulses of 4CP were added to the respirometer. A mathematical model was developed to represent the aerobic biodegradation of 4CP. The fitted model adequately predicted the oxygen consumption rate, total phenols, and soluble COD concentrations as a function of time. The results presented could help to predict the dynamic of biodegradation of chlorophenols in a biological wastewater treatment system.
format Articulo
Articulo
author Lobo, Cintia Cecilia
Bértola, Nora Cristina
Contreras, Edgardo Martín
Zaritzky, Noemí Elisabet
author_facet Lobo, Cintia Cecilia
Bértola, Nora Cristina
Contreras, Edgardo Martín
Zaritzky, Noemí Elisabet
author_sort Lobo, Cintia Cecilia
title Monitoring and modeling 4-chlorophenol biodegradation kinetics by phenol-acclimated activated sludge by using open respirometry
title_short Monitoring and modeling 4-chlorophenol biodegradation kinetics by phenol-acclimated activated sludge by using open respirometry
title_full Monitoring and modeling 4-chlorophenol biodegradation kinetics by phenol-acclimated activated sludge by using open respirometry
title_fullStr Monitoring and modeling 4-chlorophenol biodegradation kinetics by phenol-acclimated activated sludge by using open respirometry
title_full_unstemmed Monitoring and modeling 4-chlorophenol biodegradation kinetics by phenol-acclimated activated sludge by using open respirometry
title_sort monitoring and modeling 4-chlorophenol biodegradation kinetics by phenol-acclimated activated sludge by using open respirometry
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/141356
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bdutipo_str Repositorios
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