The impact of temperature on the rheological behaviour of anaerobic digested sludge
Identifieur interne : 004C03 ( Main/Exploration ); précédent : 004C02; suivant : 004C04The impact of temperature on the rheological behaviour of anaerobic digested sludge
Auteurs : J. C. Baudez [France, Australie] ; P. Slatter [Australie] ; N. Eshtiaghi [Australie]Source :
- Chemical engineering journal : (1996) [ 1385-8947 ] ; 2013.
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- Pascal (Inist)
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Abstract
The rheological properties of municipal anaerobic digested sludge rheology are temperature dependent. In this paper, we show that both solid and liquid characteristics decrease with temperature. We also show that the yield stress and the high shear (Bingham) viscosity are the two key parameters determining the rheological behaviour. By normalising the shear stress with the yield stress and the shear rate with the yield stress divided by the Bingham viscosity, a master curve was obtained, independent of both temperature and concentration. We also show that the rheological behaviour is irreversibly altered by the thermal history. Dissolution of some of the solids may cause a decrease of the yield stress and an increase of the Bingham viscosity. This result suggests that the usual laws used to describe the thermal evolution of the rheological behaviour of fluids are no longer valid with anaerobic digested sludge. Finally, the impact of temperature and thermal history have to be taken into account for the design of engineering hydrodynamic processes such as mixing and pumping.
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Eshtiaghi</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Rheology and Materials Processing Centre, Dept, of Chemical Engineering, RMIT University</s1><s2>Victoria 3001</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Victoria 3001</wicri:noRegion></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">INIST</idno><idno type="inist">13-0118977</idno><date when="2013">2013</date><idno type="stanalyst">PASCAL 13-0118977 INIST</idno><idno type="RBID">Pascal:13-0118977</idno><idno type="wicri:Area/PascalFrancis/Corpus">000B62</idno><idno type="wicri:Area/PascalFrancis/Curation">005303</idno><idno type="wicri:Area/PascalFrancis/Checkpoint">000564</idno><idno type="wicri:explorRef" wicri:stream="PascalFrancis" wicri:step="Checkpoint">000564</idno><idno type="wicri:doubleKey">1385-8947:2013:Baudez J:the:impact:of</idno><idno type="wicri:Area/Main/Merge">004D38</idno><idno type="wicri:Area/Main/Curation">004C03</idno><idno type="wicri:Area/Main/Exploration">004C03</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a">The impact of temperature on the rheological behaviour of anaerobic digested sludge</title><author><name sortKey="Baudez, J C" sort="Baudez, J C" uniqKey="Baudez J" first="J. C." last="Baudez">J. C. Baudez</name><affiliation wicri:level="3"><inist:fA14 i1="01"><s1>Irstea, UR TSCF, Domaine des Palaquins</s1><s2>03150 Montoldre</s2><s3>FRA</s3><sZ>1 aut.</sZ></inist:fA14><country>France</country><placeName><region type="region" nuts="2">Auvergne-Rhône-Alpes</region><region type="old region" nuts="2">Auvergne (région administrative)</region><settlement type="city">Montoldre</settlement></placeName></affiliation><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Rheology and Materials Processing Centre, Dept, of Chemical Engineering, RMIT University</s1><s2>Victoria 3001</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Victoria 3001</wicri:noRegion></affiliation></author><author><name sortKey="Slatter, P" sort="Slatter, P" uniqKey="Slatter P" first="P." last="Slatter">P. Slatter</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Rheology and Materials Processing Centre, Dept, of Chemical Engineering, RMIT University</s1><s2>Victoria 3001</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Victoria 3001</wicri:noRegion></affiliation></author><author><name sortKey="Eshtiaghi, N" sort="Eshtiaghi, N" uniqKey="Eshtiaghi N" first="N." last="Eshtiaghi">N. Eshtiaghi</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Rheology and Materials Processing Centre, Dept, of Chemical Engineering, RMIT University</s1><s2>Victoria 3001</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Victoria 3001</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Chemical engineering journal : (1996)</title><title level="j" type="abbreviated">Chem. eng. j. : (1996)</title><idno type="ISSN">1385-8947</idno><imprint><date when="2013">2013</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Chemical engineering journal : (1996)</title><title level="j" type="abbreviated">Chem. eng. j. : (1996)</title><idno type="ISSN">1385-8947</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Agitation</term><term>Anaerobic digestion</term><term>Design</term><term>Dissolution</term><term>Hydrodynamics</term><term>Mixing</term><term>Pumping</term><term>Rheological properties</term><term>Sewage sludge</term><term>Shear</term><term>Shear stress</term><term>Thermal history</term><term>Viscosity</term><term>Yield stress</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Digestion anaérobie</term><term>Boue résiduaire</term><term>Propriété rhéologique</term><term>Contrainte élasticité</term><term>Cisaillement</term><term>Viscosité</term><term>Contrainte cisaillement</term><term>Histoire thermique</term><term>Dissolution</term><term>Conception</term><term>Hydrodynamique</term><term>Mélangeage</term><term>Pompage</term><term>Agitation</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The rheological properties of municipal anaerobic digested sludge rheology are temperature dependent. In this paper, we show that both solid and liquid characteristics decrease with temperature. We also show that the yield stress and the high shear (Bingham) viscosity are the two key parameters determining the rheological behaviour. By normalising the shear stress with the yield stress and the shear rate with the yield stress divided by the Bingham viscosity, a master curve was obtained, independent of both temperature and concentration. We also show that the rheological behaviour is irreversibly altered by the thermal history. Dissolution of some of the solids may cause a decrease of the yield stress and an increase of the Bingham viscosity. This result suggests that the usual laws used to describe the thermal evolution of the rheological behaviour of fluids are no longer valid with anaerobic digested sludge. Finally, the impact of temperature and thermal history have to be taken into account for the design of engineering hydrodynamic processes such as mixing and pumping.</div></front></TEI><affiliations><list><country><li>Australie</li><li>France</li></country><region><li>Auvergne (région administrative)</li><li>Auvergne-Rhône-Alpes</li></region><settlement><li>Montoldre</li></settlement></list><tree><country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Baudez, J C" sort="Baudez, J C" uniqKey="Baudez J" first="J. C." last="Baudez">J. C. Baudez</name></region></country><country name="Australie"><noRegion><name sortKey="Baudez, J C" sort="Baudez, J C" uniqKey="Baudez J" first="J. C." last="Baudez">J. C. Baudez</name></noRegion><name sortKey="Eshtiaghi, N" sort="Eshtiaghi, N" uniqKey="Eshtiaghi N" first="N." last="Eshtiaghi">N. Eshtiaghi</name><name sortKey="Slatter, P" sort="Slatter, P" uniqKey="Slatter P" first="P." last="Slatter">P. 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