Predicting the apparent viscosity and yield stress of mixtures of primary, secondary and anaerobically digested sewage sludge: Simulating anaerobic digesters.
Identifieur interne : 001988 ( PubMed/Corpus ); précédent : 001987; suivant : 001989Predicting the apparent viscosity and yield stress of mixtures of primary, secondary and anaerobically digested sewage sludge: Simulating anaerobic digesters.
Auteurs : Flora Markis ; Jean-Christophe Baudez ; Rajarathinam Parthasarathy ; Paul Slatter ; Nicky EshtiaghiSource :
- Water research [ 1879-2448 ] ; 2016.
English descriptors
- KwdEn :
- MESH :
- chemical : Sewage.
- Hydrodynamics, Models, Theoretical, Rheology, Viscosity.
Abstract
Predicting the flow behaviour, most notably, the apparent viscosity and yield stress of sludge mixtures inside the anaerobic digester is essential because it helps optimize the mixing system in digesters. This paper investigates the rheology of sludge mixtures as a function of digested sludge volume fraction. Sludge mixtures exhibited non-Newtonian, shear thinning, yield stress behaviour. The apparent viscosity and yield stress of sludge mixtures prepared at the same total solids concentration was influenced by the interactions within the digested sludge and increased with the volume fraction of digested sludge - highlighted using shear compliance and shear modulus of sludge mixtures. However, when a thickened primary - secondary sludge mixture was mixed with dilute digested sludge, the apparent viscosity and yield stress decreased with increasing the volume fraction of digested sludge. This was caused by the dilution effect leading to a reduction in the hydrodynamic and non-hydrodynamic interactions when dilute digested sludge was added. Correlations were developed to predict the apparent viscosity and yield stress of the mixtures as a function of the digested sludge volume fraction and total solids concentration of the mixtures. The parameters of correlations can be estimated using pH of sludge. The shear and complex modulus were also modelled and they followed an exponential relationship with increasing digested sludge volume fraction.
DOI: 10.1016/j.watres.2016.05.045
PubMed: 27243386
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pubmed:27243386Le document en format XML
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Electronic address: nicky.eshtiaghi@rmit.edu.au.</nlm:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2016">2016</date><idno type="RBID">pubmed:27243386</idno><idno type="pmid">27243386</idno><idno type="doi">10.1016/j.watres.2016.05.045</idno><idno type="wicri:Area/PubMed/Corpus">001988</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">001988</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Predicting the apparent viscosity and yield stress of mixtures of primary, secondary and anaerobically digested sewage sludge: Simulating anaerobic digesters.</title><author><name sortKey="Markis, Flora" sort="Markis, Flora" uniqKey="Markis F" first="Flora" last="Markis">Flora Markis</name><affiliation><nlm:affiliation>School of Civil, Environmental and Chemical Engineering, RMIT University, 3001, Melbourne, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Baudez, Jean Christophe" sort="Baudez, Jean Christophe" uniqKey="Baudez J" first="Jean-Christophe" last="Baudez">Jean-Christophe Baudez</name><affiliation><nlm:affiliation>Irstea, UR TSCF, F-03150, Montoldre, France.</nlm:affiliation></affiliation></author><author><name sortKey="Parthasarathy, Rajarathinam" sort="Parthasarathy, Rajarathinam" uniqKey="Parthasarathy R" first="Rajarathinam" last="Parthasarathy">Rajarathinam Parthasarathy</name><affiliation><nlm:affiliation>School of Civil, Environmental and Chemical Engineering, RMIT University, 3001, Melbourne, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Slatter, Paul" sort="Slatter, Paul" uniqKey="Slatter P" first="Paul" last="Slatter">Paul Slatter</name><affiliation><nlm:affiliation>ATC Williams, Mordialloc, VIC, 3195, Australia.</nlm:affiliation></affiliation></author><author><name sortKey="Eshtiaghi, Nicky" sort="Eshtiaghi, Nicky" uniqKey="Eshtiaghi N" first="Nicky" last="Eshtiaghi">Nicky Eshtiaghi</name><affiliation><nlm:affiliation>School of Civil, Environmental and Chemical Engineering, RMIT University, 3001, Melbourne, Australia. Electronic address: nicky.eshtiaghi@rmit.edu.au.</nlm:affiliation></affiliation></author></analytic><series><title level="j">Water research</title><idno type="eISSN">1879-2448</idno><imprint><date when="2016" type="published">2016</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Hydrodynamics</term><term>Models, Theoretical</term><term>Rheology</term><term>Sewage</term><term>Viscosity</term></keywords><keywords scheme="MESH" type="chemical" xml:lang="en"><term>Sewage</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Hydrodynamics</term><term>Models, Theoretical</term><term>Rheology</term><term>Viscosity</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Predicting the flow behaviour, most notably, the apparent viscosity and yield stress of sludge mixtures inside the anaerobic digester is essential because it helps optimize the mixing system in digesters. This paper investigates the rheology of sludge mixtures as a function of digested sludge volume fraction. Sludge mixtures exhibited non-Newtonian, shear thinning, yield stress behaviour. The apparent viscosity and yield stress of sludge mixtures prepared at the same total solids concentration was influenced by the interactions within the digested sludge and increased with the volume fraction of digested sludge - highlighted using shear compliance and shear modulus of sludge mixtures. However, when a thickened primary - secondary sludge mixture was mixed with dilute digested sludge, the apparent viscosity and yield stress decreased with increasing the volume fraction of digested sludge. This was caused by the dilution effect leading to a reduction in the hydrodynamic and non-hydrodynamic interactions when dilute digested sludge was added. Correlations were developed to predict the apparent viscosity and yield stress of the mixtures as a function of the digested sludge volume fraction and total solids concentration of the mixtures. The parameters of correlations can be estimated using pH of sludge. The shear and complex modulus were also modelled and they followed an exponential relationship with increasing digested sludge volume fraction.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">27243386</PMID><DateCreated><Year>2016</Year><Month>06</Month><Day>12</Day></DateCreated><DateCompleted><Year>2017</Year><Month>05</Month><Day>05</Day></DateCompleted><DateRevised><Year>2017</Year><Month>08</Month><Day>05</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1879-2448</ISSN><JournalIssue CitedMedium="Internet"><Volume>100</Volume><PubDate><Year>2016</Year><Month>Sep</Month><Day>01</Day></PubDate></JournalIssue><Title>Water research</Title><ISOAbbreviation>Water Res.</ISOAbbreviation></Journal><ArticleTitle>Predicting the apparent viscosity and yield stress of mixtures of primary, secondary and anaerobically digested sewage sludge: Simulating anaerobic digesters.</ArticleTitle><Pagination><MedlinePgn>568-579</MedlinePgn></Pagination><ELocationID EIdType="pii" ValidYN="Y">S0043-1354(16)30371-2</ELocationID><ELocationID EIdType="doi" ValidYN="Y">10.1016/j.watres.2016.05.045</ELocationID><Abstract><AbstractText>Predicting the flow behaviour, most notably, the apparent viscosity and yield stress of sludge mixtures inside the anaerobic digester is essential because it helps optimize the mixing system in digesters. This paper investigates the rheology of sludge mixtures as a function of digested sludge volume fraction. Sludge mixtures exhibited non-Newtonian, shear thinning, yield stress behaviour. The apparent viscosity and yield stress of sludge mixtures prepared at the same total solids concentration was influenced by the interactions within the digested sludge and increased with the volume fraction of digested sludge - highlighted using shear compliance and shear modulus of sludge mixtures. However, when a thickened primary - secondary sludge mixture was mixed with dilute digested sludge, the apparent viscosity and yield stress decreased with increasing the volume fraction of digested sludge. This was caused by the dilution effect leading to a reduction in the hydrodynamic and non-hydrodynamic interactions when dilute digested sludge was added. Correlations were developed to predict the apparent viscosity and yield stress of the mixtures as a function of the digested sludge volume fraction and total solids concentration of the mixtures. The parameters of correlations can be estimated using pH of sludge. The shear and complex modulus were also modelled and they followed an exponential relationship with increasing digested sludge volume fraction.</AbstractText><CopyrightInformation>Copyright © 2016 Elsevier Ltd. All rights reserved.</CopyrightInformation></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Markis</LastName><ForeName>Flora</ForeName><Initials>F</Initials><AffiliationInfo><Affiliation>School of Civil, Environmental and Chemical Engineering, RMIT University, 3001, Melbourne, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Baudez</LastName><ForeName>Jean-Christophe</ForeName><Initials>JC</Initials><AffiliationInfo><Affiliation>Irstea, UR TSCF, F-03150, Montoldre, France.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Parthasarathy</LastName><ForeName>Rajarathinam</ForeName><Initials>R</Initials><AffiliationInfo><Affiliation>School of Civil, Environmental and Chemical Engineering, RMIT University, 3001, Melbourne, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Slatter</LastName><ForeName>Paul</ForeName><Initials>P</Initials><AffiliationInfo><Affiliation>ATC Williams, Mordialloc, VIC, 3195, Australia.</Affiliation></AffiliationInfo></Author><Author ValidYN="Y"><LastName>Eshtiaghi</LastName><ForeName>Nicky</ForeName><Initials>N</Initials><AffiliationInfo><Affiliation>School of Civil, Environmental and Chemical Engineering, RMIT University, 3001, Melbourne, Australia. Electronic address: nicky.eshtiaghi@rmit.edu.au.</Affiliation></AffiliationInfo></Author></AuthorList><Language>eng</Language><PublicationTypeList><PublicationType UI="D016428">Journal Article</PublicationType></PublicationTypeList><ArticleDate DateType="Electronic"><Year>2016</Year><Month>05</Month><Day>17</Day></ArticleDate></Article><MedlineJournalInfo><Country>England</Country><MedlineTA>Water Res</MedlineTA><NlmUniqueID>0105072</NlmUniqueID><ISSNLinking>0043-1354</ISSNLinking></MedlineJournalInfo><ChemicalList><Chemical><RegistryNumber>0</RegistryNumber><NameOfSubstance UI="D012722">Sewage</NameOfSubstance></Chemical></ChemicalList><CitationSubset>IM</CitationSubset><MeshHeadingList><MeshHeading><DescriptorName UI="D057446" MajorTopicYN="N">Hydrodynamics</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D008962" MajorTopicYN="N">Models, Theoretical</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012212" MajorTopicYN="N">Rheology</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D012722" MajorTopicYN="Y">Sewage</DescriptorName></MeshHeading><MeshHeading><DescriptorName UI="D014783" MajorTopicYN="Y">Viscosity</DescriptorName></MeshHeading></MeshHeadingList><KeywordList Owner="NOTNLM"><Keyword MajorTopicYN="N">Digested sludge</Keyword><Keyword MajorTopicYN="N">Mixtures</Keyword><Keyword MajorTopicYN="N">Primary sludge</Keyword><Keyword MajorTopicYN="N">Secondary sludge</Keyword><Keyword MajorTopicYN="N">Viscosity</Keyword><Keyword MajorTopicYN="N">Yield stress</Keyword></KeywordList></MedlineCitation><PubmedData><History><PubMedPubDate PubStatus="received"><Year>2015</Year><Month>11</Month><Day>18</Day></PubMedPubDate><PubMedPubDate PubStatus="revised"><Year>2016</Year><Month>05</Month><Day>13</Day></PubMedPubDate><PubMedPubDate PubStatus="accepted"><Year>2016</Year><Month>05</Month><Day>14</Day></PubMedPubDate><PubMedPubDate PubStatus="entrez"><Year>2016</Year><Month>6</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="pubmed"><Year>2016</Year><Month>6</Month><Day>1</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate><PubMedPubDate PubStatus="medline"><Year>2017</Year><Month>5</Month><Day>6</Day><Hour>6</Hour><Minute>0</Minute></PubMedPubDate></History><PublicationStatus>ppublish</PublicationStatus><ArticleIdList><ArticleId IdType="pubmed">27243386</ArticleId><ArticleId IdType="pii">S0043-1354(16)30371-2</ArticleId><ArticleId IdType="doi">10.1016/j.watres.2016.05.045</ArticleId></ArticleIdList></PubmedData></pubmed></record>Pour manipuler ce document sous Unix (Dilib)
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