The role of extracellular polymeric substances (EPS) on aerobic granules formation: comparison between a case of synthetic wastewater supply and another of industrial wastewater.

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Abstract

The paper focused on the evolution and the comparison of the extracellular polymeric substances (EPSs) content during the granulation process in two Granular Sequencing Batch Airlift Reactors(GSBAR) (3,5 L) fed with synthetic (R1) and industrial wastewater (R2). The results showed that in both the reactors the EPSs, in particular proteins (PN), were mainly produced during the feast phase because of the high substrate availability, especially under conditions of metabolic stress. Then, the EPSs content reduced during the famine period, because of biodegradation by bacteria. More in detail, during the granulation process, a greater polysaccharides (PS) consumption occurred in both reactors, whereas the PN content reduced significantly only in R2. As a result, the PN/PS ratio increased significantly during the granules formation, confirming the key role of proteins on the granulation process. In R2, the granules produced a greater amount of PN on average, and this resulted in a more rapid granulation. Nevertheless, due to the several consumption of PN during the famine period, the granules in R2 resulted weaker and less dense compared with the granules in R1. For this reason, the granules in R2 were more susceptible to breakage. Overall, although the industrial wastewater favored a more rapid granulation, the excessive consumption of the EPSs, led to the structural weakening of the granules.
Lingua originaleEnglish
pagine (da-a)196-205
Numero di pagine10
RivistaDesalination and Water Treatment
Volume61
Stato di pubblicazionePublished - 2017

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Granulation
Wastewater
Proteins
wastewater
protein
famine
Polysaccharides
polysaccharide
Batch reactors
breakage
Biodegradation
comparison
biodegradation
Bacteria
Availability
substrate
bacterium
Substrates
reactor
consumption

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

Cita questo

@article{a8e87df31ad842cbba21696dfe4394f8,
title = "The role of extracellular polymeric substances (EPS) on aerobic granules formation: comparison between a case of synthetic wastewater supply and another of industrial wastewater.",
abstract = "The paper focused on the evolution and the comparison of the extracellular polymeric substances (EPSs) content during the granulation process in two Granular Sequencing Batch Airlift Reactors(GSBAR) (3,5 L) fed with synthetic (R1) and industrial wastewater (R2). The results showed that in both the reactors the EPSs, in particular proteins (PN), were mainly produced during the feast phase because of the high substrate availability, especially under conditions of metabolic stress. Then, the EPSs content reduced during the famine period, because of biodegradation by bacteria. More in detail, during the granulation process, a greater polysaccharides (PS) consumption occurred in both reactors, whereas the PN content reduced significantly only in R2. As a result, the PN/PS ratio increased significantly during the granules formation, confirming the key role of proteins on the granulation process. In R2, the granules produced a greater amount of PN on average, and this resulted in a more rapid granulation. Nevertheless, due to the several consumption of PN during the famine period, the granules in R2 resulted weaker and less dense compared with the granules in R1. For this reason, the granules in R2 were more susceptible to breakage. Overall, although the industrial wastewater favored a more rapid granulation, the excessive consumption of the EPSs, led to the structural weakening of the granules.",
author = "Gaspare Viviani and Michele Torregrossa and Corsino, {Santo Fabio}",
year = "2017",
language = "English",
volume = "61",
pages = "196--205",
journal = "Desalination and Water Treatment",
issn = "1944-3994",
publisher = "Taylor and Francis Ltd.",

}

TY - JOUR

T1 - The role of extracellular polymeric substances (EPS) on aerobic granules formation: comparison between a case of synthetic wastewater supply and another of industrial wastewater.

AU - Viviani, Gaspare

AU - Torregrossa, Michele

AU - Corsino, Santo Fabio

PY - 2017

Y1 - 2017

N2 - The paper focused on the evolution and the comparison of the extracellular polymeric substances (EPSs) content during the granulation process in two Granular Sequencing Batch Airlift Reactors(GSBAR) (3,5 L) fed with synthetic (R1) and industrial wastewater (R2). The results showed that in both the reactors the EPSs, in particular proteins (PN), were mainly produced during the feast phase because of the high substrate availability, especially under conditions of metabolic stress. Then, the EPSs content reduced during the famine period, because of biodegradation by bacteria. More in detail, during the granulation process, a greater polysaccharides (PS) consumption occurred in both reactors, whereas the PN content reduced significantly only in R2. As a result, the PN/PS ratio increased significantly during the granules formation, confirming the key role of proteins on the granulation process. In R2, the granules produced a greater amount of PN on average, and this resulted in a more rapid granulation. Nevertheless, due to the several consumption of PN during the famine period, the granules in R2 resulted weaker and less dense compared with the granules in R1. For this reason, the granules in R2 were more susceptible to breakage. Overall, although the industrial wastewater favored a more rapid granulation, the excessive consumption of the EPSs, led to the structural weakening of the granules.

AB - The paper focused on the evolution and the comparison of the extracellular polymeric substances (EPSs) content during the granulation process in two Granular Sequencing Batch Airlift Reactors(GSBAR) (3,5 L) fed with synthetic (R1) and industrial wastewater (R2). The results showed that in both the reactors the EPSs, in particular proteins (PN), were mainly produced during the feast phase because of the high substrate availability, especially under conditions of metabolic stress. Then, the EPSs content reduced during the famine period, because of biodegradation by bacteria. More in detail, during the granulation process, a greater polysaccharides (PS) consumption occurred in both reactors, whereas the PN content reduced significantly only in R2. As a result, the PN/PS ratio increased significantly during the granules formation, confirming the key role of proteins on the granulation process. In R2, the granules produced a greater amount of PN on average, and this resulted in a more rapid granulation. Nevertheless, due to the several consumption of PN during the famine period, the granules in R2 resulted weaker and less dense compared with the granules in R1. For this reason, the granules in R2 were more susceptible to breakage. Overall, although the industrial wastewater favored a more rapid granulation, the excessive consumption of the EPSs, led to the structural weakening of the granules.

UR - http://hdl.handle.net/10447/264055

M3 - Article

VL - 61

SP - 196

EP - 205

JO - Desalination and Water Treatment

JF - Desalination and Water Treatment

SN - 1944-3994

ER -