Fate of aerobic granular sludge in the long-term: The role of EPSs on the clogging of granular sludge porosity

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Abstract

This work aims to investigate the stability of aerobic granular sludge in the long term, focusing on the clogging of the granular sludge porosity exerted by the extracellular polymeric substances (EPSs). The effects of different cycle lengths (short and long-term cycle) on the granular sludge stability were investigated. Results obtained outlined that during the short duration cycle, the formation and breakage of the aerobic granules were continuously observed. During this period, the excess of EPS production contributed to the clogging of the granules porosity, causing their breakage in the long run. During the long-duration cycle, the extended famine period entailed a greater EPSs consumption by bacteria, thus limiting the clogging of the porosity, and allowed obtaining stable aerobic granules. Reported results demonstrated that an excess in EPSs content could be detrimental to the stability of aerobic granular sludge in the long-term.
Lingua originaleEnglish
pagine (da-a)541-550
Numero di pagine10
RivistaJournal of Environmental Management
Volume183
Stato di pubblicazionePublished - 2016

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Porosity
sludge
porosity
breakage
famine
Bacteria
bacterium

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Waste Management and Disposal
  • Management, Monitoring, Policy and Law

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title = "Fate of aerobic granular sludge in the long-term: The role of EPSs on the clogging of granular sludge porosity",
abstract = "This work aims to investigate the stability of aerobic granular sludge in the long term, focusing on the clogging of the granular sludge porosity exerted by the extracellular polymeric substances (EPSs). The effects of different cycle lengths (short and long-term cycle) on the granular sludge stability were investigated. Results obtained outlined that during the short duration cycle, the formation and breakage of the aerobic granules were continuously observed. During this period, the excess of EPS production contributed to the clogging of the granules porosity, causing their breakage in the long run. During the long-duration cycle, the extended famine period entailed a greater EPSs consumption by bacteria, thus limiting the clogging of the porosity, and allowed obtaining stable aerobic granules. Reported results demonstrated that an excess in EPSs content could be detrimental to the stability of aerobic granular sludge in the long-term.",
keywords = "Aerobic granular sludge; Extracellular polymeric substances (EPSs); Feast/famine; Long-term stability; Porosity clogging; Environmental Engineering; Waste Management and Disposal; Management, Monitoring, Policy and Law",
author = "Gaspare Viviani and Michele Torregrossa and Corsino, {Santo Fabio} and Marco Capodici",
year = "2016",
language = "English",
volume = "183",
pages = "541--550",
journal = "Journal of Environmental Management",
issn = "0301-4797",
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TY - JOUR

T1 - Fate of aerobic granular sludge in the long-term: The role of EPSs on the clogging of granular sludge porosity

AU - Viviani, Gaspare

AU - Torregrossa, Michele

AU - Corsino, Santo Fabio

AU - Capodici, Marco

PY - 2016

Y1 - 2016

N2 - This work aims to investigate the stability of aerobic granular sludge in the long term, focusing on the clogging of the granular sludge porosity exerted by the extracellular polymeric substances (EPSs). The effects of different cycle lengths (short and long-term cycle) on the granular sludge stability were investigated. Results obtained outlined that during the short duration cycle, the formation and breakage of the aerobic granules were continuously observed. During this period, the excess of EPS production contributed to the clogging of the granules porosity, causing their breakage in the long run. During the long-duration cycle, the extended famine period entailed a greater EPSs consumption by bacteria, thus limiting the clogging of the porosity, and allowed obtaining stable aerobic granules. Reported results demonstrated that an excess in EPSs content could be detrimental to the stability of aerobic granular sludge in the long-term.

AB - This work aims to investigate the stability of aerobic granular sludge in the long term, focusing on the clogging of the granular sludge porosity exerted by the extracellular polymeric substances (EPSs). The effects of different cycle lengths (short and long-term cycle) on the granular sludge stability were investigated. Results obtained outlined that during the short duration cycle, the formation and breakage of the aerobic granules were continuously observed. During this period, the excess of EPS production contributed to the clogging of the granules porosity, causing their breakage in the long run. During the long-duration cycle, the extended famine period entailed a greater EPSs consumption by bacteria, thus limiting the clogging of the porosity, and allowed obtaining stable aerobic granules. Reported results demonstrated that an excess in EPSs content could be detrimental to the stability of aerobic granular sludge in the long-term.

KW - Aerobic granular sludge; Extracellular polymeric substances (EPSs); Feast/famine; Long-term stability; Porosity clogging; Environmental Engineering; Waste Management and Disposal; Management

KW - Monitoring

KW - Policy and Law

UR - http://hdl.handle.net/10447/215643

UR - http://www.elsevier.com/inca/publications/store/6/2/2/8/7/1/index.htt

M3 - Article

VL - 183

SP - 541

EP - 550

JO - Journal of Environmental Management

JF - Journal of Environmental Management

SN - 0301-4797

ER -