Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor

The effect of sequencing batch reactor (SBR) operating conditions on sludge macromolecular composition and the effect of sludge macromolecular composition on the anaerobic degradation of the sludge produced in SBR was investigated in this work. A SBR, fed with synthetic wastewater, was operated at d...

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Autores principales:	Chelme,Susana, Fonseca,Pamela, Mercado,Rodrigo, Alarcon,Nelson, Sánchez,Omar
Lenguaje:	English
Publicado:	Pontificia Universidad Católica de Valparaíso 2008
Materias:	anaerobic digestion sequencing batch reactor sludge
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000300010
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spelling	oai:scielo:S0717-345820080003000102009-01-30Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactorChelme,SusanaFonseca,PamelaMercado,RodrigoAlarcon,NelsonSánchez,Omar anaerobic digestion sequencing batch reactor sludge The effect of sequencing batch reactor (SBR) operating conditions on sludge macromolecular composition and the effect of sludge macromolecular composition on the anaerobic degradation of the sludge produced in SBR was investigated in this work. A SBR, fed with synthetic wastewater, was operated at different air flow rates. The resulting sludge was analyzed in terms of protein, carbohydrate, phospholipid and polyhydroxybutyrate concentrations. Methane production during anaerobic digestion of the sludge was also measured. Ammonium, nitrite, nitrate, dissolved oxygen and chemical oxygen demand (COD) track studies in the SBR were carried out in order to relate SBR performance and sludge macromolecular composition. The lowest air flow rate at which the SBR was operated was 2 l min-1, in which case the dissolved oxygen concentration was lower than 0.5 mg l-1 in the SBR and partial denitrification occurred during the feeding phase. An increased air flow rate caused a decrease in protein concentration, as well as an increase in carbohydrate concentration. Polyhydroxybutyrate (PHB) concentration in the sludge was independent of air flow rate. At different air flows, the methane production rates were similar, but the total volume of methane was greater during anaerobic digestion of the sludge produced at low air flow rates. These results indicate a strategy by which changes in sludge composition can optimize the operation of anaerobic sludge digesters.info:eu-repo/semantics/openAccessPontificia Universidad Católica de ValparaísoElectronic Journal of Biotechnology v.11 n.3 20082008-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000300010en10.4067/S0717-34582008000300010
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	anaerobic digestion sequencing batch reactor sludge
spellingShingle	anaerobic digestion sequencing batch reactor sludge Chelme,Susana Fonseca,Pamela Mercado,Rodrigo Alarcon,Nelson Sánchez,Omar Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor
description	The effect of sequencing batch reactor (SBR) operating conditions on sludge macromolecular composition and the effect of sludge macromolecular composition on the anaerobic degradation of the sludge produced in SBR was investigated in this work. A SBR, fed with synthetic wastewater, was operated at different air flow rates. The resulting sludge was analyzed in terms of protein, carbohydrate, phospholipid and polyhydroxybutyrate concentrations. Methane production during anaerobic digestion of the sludge was also measured. Ammonium, nitrite, nitrate, dissolved oxygen and chemical oxygen demand (COD) track studies in the SBR were carried out in order to relate SBR performance and sludge macromolecular composition. The lowest air flow rate at which the SBR was operated was 2 l min-1, in which case the dissolved oxygen concentration was lower than 0.5 mg l-1 in the SBR and partial denitrification occurred during the feeding phase. An increased air flow rate caused a decrease in protein concentration, as well as an increase in carbohydrate concentration. Polyhydroxybutyrate (PHB) concentration in the sludge was independent of air flow rate. At different air flows, the methane production rates were similar, but the total volume of methane was greater during anaerobic digestion of the sludge produced at low air flow rates. These results indicate a strategy by which changes in sludge composition can optimize the operation of anaerobic sludge digesters.
author	Chelme,Susana Fonseca,Pamela Mercado,Rodrigo Alarcon,Nelson Sánchez,Omar
author_facet	Chelme,Susana Fonseca,Pamela Mercado,Rodrigo Alarcon,Nelson Sánchez,Omar
author_sort	Chelme,Susana
title	Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor
title_short	Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor
title_full	Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor
title_fullStr	Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor
title_full_unstemmed	Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor
title_sort	macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor
publisher	Pontificia Universidad Católica de Valparaíso
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000300010
work_keys_str_mv	AT chelmesusana macromolecularcompositionandanaerobicdegradationofthesludgeproducedinasequencingbatchreactor AT fonsecapamela macromolecularcompositionandanaerobicdegradationofthesludgeproducedinasequencingbatchreactor AT mercadorodrigo macromolecularcompositionandanaerobicdegradationofthesludgeproducedinasequencingbatchreactor AT alarconnelson macromolecularcompositionandanaerobicdegradationofthesludgeproducedinasequencingbatchreactor AT sanchezomar macromolecularcompositionandanaerobicdegradationofthesludgeproducedinasequencingbatchreactor
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Macromolecular composition and anaerobic degradation of the sludge produced in a sequencing batch reactor

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