LrgpV1, PascalFrancis, Corpus, bibRecord, 000504

Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal

Identifieur interne : 000504 ( PascalFrancis/Corpus ); précédent : 000503; suivant : 000505

Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal

Auteurs : C. Lopez ; M. N. Pons ; E. Morgenroth

Source :

Water research : (Oxford) [ 0043-1354 ] ; 2006.

RBID : Pascal:06-0306140

Descripteurs français

Pascal (Inist)
- Long terme, Boue activée, Phosphore, Traitement biologique, Epuration eau usée, Biomasse, Aérobie, Anaérobie, Réacteur SBR, En discontinu, Modélisation, Modèle mathématique, Epuration biologique, Traitement déchet, Bioréacteur.

English descriptors

KwdEn :
- Activated sludge, Aerobe, Anaerobe, Batchwise, Biological purification, Biological treatment, Biomass, Bioreactor, Long term, Mathematical model, Modeling, Phosphorus, Sequencing batch reactor, Waste treatment, Waste water purification.

Abstract

In many biological wastewater treatment systems, bacterial growth and the amount of active biomass are limited by the availability of substrate. Under these low growth conditions, endogenous processes have a significant influence on the amount of active biomass and therefore, the overall system performance. In enhanced biological phosphorus removal (EBPR) systems endogenous processes can also influence the levels of the internal storage compounds of the polyphosphate accumulating organisms (PAO), directly affecting phosphorus removal performance. The purpose of this study was to evaluate the significance of different endogenous processes that occur during the long-term starvation of EBPR sludge under aerobic and anaerobic conditions. Activated sludge obtained from a laboratory sequencing batch reactor was used to perform a series of batch starvation experiments. Under aerobic starvation conditions we observed a significant decay of PAO (first-order decay rate of 0.15/d) together with a rapid utilization of polyhydroxyalkanoates (PHA) and a slower utilization of glycogen and polyphosphate to generate maintenance energy. On the other hand, anaerobic starvation was best described by maintenance processes that rapidly reduce the levels of polyphosphate and glycogen under starvation conditions while no significant decay of PAO was observed. The endogenous utilization of glycogen for maintenance purposes is currently not included in available EBPR models. Our experimental results suggest that mathematical models for in EBPR should differentiate between aerobic and anaerobic endogenous processes, as they influence active biomass and storage products differently.

Notice en format standard (ISO 2709)

Pour connaître la documentation sur le format Inist Standard.

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A11	`01`	`1`		`@1 LOPEZ (C.)`
A11	`02`	`1`		`@1 PONS (M. N.)`
A11	`03`	`1`		`@1 MORGENROTH (E.)`
A14	`01`			`@1 Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 3219 Newmark Civil Engineering Laboratory, 205 North Mathews Avenue @2 Urbana, IL 61801 @3 USA @Z 1 aut. @Z 3 aut.`
A14	`02`			`@1 Laboratoire des Sciences du Génie Chimique, CNRS-ENSIC-INPL, BP 20451 @2 54001, Nancy @3 FRA @Z 2 aut.`
A14	`03`			`@1 Department of Animal Sciences, University of Illinois at Urbana-Champaign. Animal Sciences Laboratory, 1207 West Gregory Drive @2 Urbana, IL 61801 @3 USA @Z 3 aut.`
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C01	`01`		`ENG`	@0 In many biological wastewater treatment systems, bacterial growth and the amount of active biomass are limited by the availability of substrate. Under these low growth conditions, endogenous processes have a significant influence on the amount of active biomass and therefore, the overall system performance. In enhanced biological phosphorus removal (EBPR) systems endogenous processes can also influence the levels of the internal storage compounds of the polyphosphate accumulating organisms (PAO), directly affecting phosphorus removal performance. The purpose of this study was to evaluate the significance of different endogenous processes that occur during the long-term starvation of EBPR sludge under aerobic and anaerobic conditions. Activated sludge obtained from a laboratory sequencing batch reactor was used to perform a series of batch starvation experiments. Under aerobic starvation conditions we observed a significant decay of PAO (first-order decay rate of 0.15/d) together with a rapid utilization of polyhydroxyalkanoates (PHA) and a slower utilization of glycogen and polyphosphate to generate maintenance energy. On the other hand, anaerobic starvation was best described by maintenance processes that rapidly reduce the levels of polyphosphate and glycogen under starvation conditions while no significant decay of PAO was observed. The endogenous utilization of glycogen for maintenance purposes is currently not included in available EBPR models. Our experimental results suggest that mathematical models for in EBPR should differentiate between aerobic and anaerobic endogenous processes, as they influence active biomass and storage products differently.
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N21				`@1 198`
N44	`01`			`@1 OTO`
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Format Inist (serveur)

NO :	PASCAL 06-0306140 INIST
ET :	Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal
AU :	LOPEZ (C.); PONS (M. N.); MORGENROTH (E.)
AF :	Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 3219 Newmark Civil Engineering Laboratory, 205 North Mathews Avenue/Urbana, IL 61801/Etats-Unis (1 aut., 3 aut.); Laboratoire des Sciences du Génie Chimique, CNRS-ENSIC-INPL, BP 20451/54001, Nancy/France (2 aut.); Department of Animal Sciences, University of Illinois at Urbana-Champaign. Animal Sciences Laboratory, 1207 West Gregory Drive/Urbana, IL 61801/Etats-Unis (3 aut.)
DT :	Publication en série; Niveau analytique
SO :	Water research : (Oxford); ISSN 0043-1354; Coden WATRAG; Royaume-Uni; Da. 2006; Vol. 40; No. 8; Pp. 1519-1530; Bibl. 1 p.1/2
LA :	Anglais
EA :	In many biological wastewater treatment systems, bacterial growth and the amount of active biomass are limited by the availability of substrate. Under these low growth conditions, endogenous processes have a significant influence on the amount of active biomass and therefore, the overall system performance. In enhanced biological phosphorus removal (EBPR) systems endogenous processes can also influence the levels of the internal storage compounds of the polyphosphate accumulating organisms (PAO), directly affecting phosphorus removal performance. The purpose of this study was to evaluate the significance of different endogenous processes that occur during the long-term starvation of EBPR sludge under aerobic and anaerobic conditions. Activated sludge obtained from a laboratory sequencing batch reactor was used to perform a series of batch starvation experiments. Under aerobic starvation conditions we observed a significant decay of PAO (first-order decay rate of 0.15/d) together with a rapid utilization of polyhydroxyalkanoates (PHA) and a slower utilization of glycogen and polyphosphate to generate maintenance energy. On the other hand, anaerobic starvation was best described by maintenance processes that rapidly reduce the levels of polyphosphate and glycogen under starvation conditions while no significant decay of PAO was observed. The endogenous utilization of glycogen for maintenance purposes is currently not included in available EBPR models. Our experimental results suggest that mathematical models for in EBPR should differentiate between aerobic and anaerobic endogenous processes, as they influence active biomass and storage products differently.
CC :	001D16A; 001D16B06
FD :	Long terme; Boue activée; Phosphore; Traitement biologique; Epuration eau usée; Biomasse; Aérobie; Anaérobie; Réacteur SBR; En discontinu; Modélisation; Modèle mathématique; Epuration biologique; Traitement déchet; Bioréacteur
ED :	Long term; Activated sludge; Phosphorus; Biological treatment; Waste water purification; Biomass; Aerobe; Anaerobe; Sequencing batch reactor; Batchwise; Modeling; Mathematical model; Biological purification; Waste treatment; Bioreactor
SD :	Largo plazo; Lodo activado; Fósforo; Tratamiento biológico; Depuración aguas servidas; Biomasa; Aerobio; Anaerobio; Reactor SBR; En discontinuo; Modelización; Modelo matemático; Depuración biológica; Tratamiento desperdicios; Biorreactor
LO :	INIST-8940A.354000115405990020
ID :	06-0306140

Links to Exploration step

Pascal:06-0306140

Le document en format XML

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<front><div type="abstract" xml:lang="en">In many biological wastewater treatment systems, bacterial growth and the amount of active biomass are limited by the availability of substrate. Under these low growth conditions, endogenous processes have a significant influence on the amount of active biomass and therefore, the overall system performance. In enhanced biological phosphorus removal (EBPR) systems endogenous processes can also influence the levels of the internal storage compounds of the polyphosphate accumulating organisms (PAO), directly affecting phosphorus removal performance. The purpose of this study was to evaluate the significance of different endogenous processes that occur during the long-term starvation of EBPR sludge under aerobic and anaerobic conditions. Activated sludge obtained from a laboratory sequencing batch reactor was used to perform a series of batch starvation experiments. Under aerobic starvation conditions we observed a significant decay of PAO (first-order decay rate of 0.15/d) together with a rapid utilization of polyhydroxyalkanoates (PHA) and a slower utilization of glycogen and polyphosphate to generate maintenance energy. On the other hand, anaerobic starvation was best described by maintenance processes that rapidly reduce the levels of polyphosphate and glycogen under starvation conditions while no significant decay of PAO was observed. The endogenous utilization of glycogen for maintenance purposes is currently not included in available EBPR models. Our experimental results suggest that mathematical models for in EBPR should differentiate between aerobic and anaerobic endogenous processes, as they influence active biomass and storage products differently.</div>
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<fC01 i1="01" l="ENG"><s0>In many biological wastewater treatment systems, bacterial growth and the amount of active biomass are limited by the availability of substrate. Under these low growth conditions, endogenous processes have a significant influence on the amount of active biomass and therefore, the overall system performance. In enhanced biological phosphorus removal (EBPR) systems endogenous processes can also influence the levels of the internal storage compounds of the polyphosphate accumulating organisms (PAO), directly affecting phosphorus removal performance. The purpose of this study was to evaluate the significance of different endogenous processes that occur during the long-term starvation of EBPR sludge under aerobic and anaerobic conditions. Activated sludge obtained from a laboratory sequencing batch reactor was used to perform a series of batch starvation experiments. Under aerobic starvation conditions we observed a significant decay of PAO (first-order decay rate of 0.15/d) together with a rapid utilization of polyhydroxyalkanoates (PHA) and a slower utilization of glycogen and polyphosphate to generate maintenance energy. On the other hand, anaerobic starvation was best described by maintenance processes that rapidly reduce the levels of polyphosphate and glycogen under starvation conditions while no significant decay of PAO was observed. The endogenous utilization of glycogen for maintenance purposes is currently not included in available EBPR models. Our experimental results suggest that mathematical models for in EBPR should differentiate between aerobic and anaerobic endogenous processes, as they influence active biomass and storage products differently.</s0>
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<server><NO>PASCAL 06-0306140 INIST</NO>
<ET>Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal</ET>
<AU>LOPEZ (C.); PONS (M. N.); MORGENROTH (E.)</AU>
<AF>Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, 3219 Newmark Civil Engineering Laboratory, 205 North Mathews Avenue/Urbana, IL 61801/Etats-Unis (1 aut., 3 aut.); Laboratoire des Sciences du Génie Chimique, CNRS-ENSIC-INPL, BP 20451/54001, Nancy/France (2 aut.); Department of Animal Sciences, University of Illinois at Urbana-Champaign. Animal Sciences Laboratory, 1207 West Gregory Drive/Urbana, IL 61801/Etats-Unis (3 aut.)</AF>
<DT>Publication en série; Niveau analytique</DT>
<SO>Water research : (Oxford); ISSN 0043-1354; Coden WATRAG; Royaume-Uni; Da. 2006; Vol. 40; No. 8; Pp. 1519-1530; Bibl. 1 p.1/2</SO>
<LA>Anglais</LA>
<EA>In many biological wastewater treatment systems, bacterial growth and the amount of active biomass are limited by the availability of substrate. Under these low growth conditions, endogenous processes have a significant influence on the amount of active biomass and therefore, the overall system performance. In enhanced biological phosphorus removal (EBPR) systems endogenous processes can also influence the levels of the internal storage compounds of the polyphosphate accumulating organisms (PAO), directly affecting phosphorus removal performance. The purpose of this study was to evaluate the significance of different endogenous processes that occur during the long-term starvation of EBPR sludge under aerobic and anaerobic conditions. Activated sludge obtained from a laboratory sequencing batch reactor was used to perform a series of batch starvation experiments. Under aerobic starvation conditions we observed a significant decay of PAO (first-order decay rate of 0.15/d) together with a rapid utilization of polyhydroxyalkanoates (PHA) and a slower utilization of glycogen and polyphosphate to generate maintenance energy. On the other hand, anaerobic starvation was best described by maintenance processes that rapidly reduce the levels of polyphosphate and glycogen under starvation conditions while no significant decay of PAO was observed. The endogenous utilization of glycogen for maintenance purposes is currently not included in available EBPR models. Our experimental results suggest that mathematical models for in EBPR should differentiate between aerobic and anaerobic endogenous processes, as they influence active biomass and storage products differently.</EA>
<CC>001D16A; 001D16B06</CC>
<FD>Long terme; Boue activée; Phosphore; Traitement biologique; Epuration eau usée; Biomasse; Aérobie; Anaérobie; Réacteur SBR; En discontinu; Modélisation; Modèle mathématique; Epuration biologique; Traitement déchet; Bioréacteur</FD>
<ED>Long term; Activated sludge; Phosphorus; Biological treatment; Waste water purification; Biomass; Aerobe; Anaerobe; Sequencing batch reactor; Batchwise; Modeling; Mathematical model; Biological purification; Waste treatment; Bioreactor</ED>
<SD>Largo plazo; Lodo activado; Fósforo; Tratamiento biológico; Depuración aguas servidas; Biomasa; Aerobio; Anaerobio; Reactor SBR; En discontinuo; Modelización; Modelo matemático; Depuración biológica; Tratamiento desperdicios; Biorreactor</SD>
<LO>INIST-8940A.354000115405990020</LO>
<ID>06-0306140</ID>
</server>
</inist>
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Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal

Endogenous processes during long-term starvation in activated sludge performing enhanced biological phosphorus removal

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