Impact of mechanical history on sludge rheological properties: Role of the organic content

The rheological behavior is known to be of great interest in sludge treatment, but the material complexity induces strong measurement difficulties. The literature highlights two characteristics deeply impacting sludge rheological properties and their characterization: Thixotropic behavior and organi...

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Bibliographic Details
Published inWater research (Oxford) Vol. 157; pp. 175 - 180
Main Authors Thiène, O., Dieudé-Fauvel, E., Baudez, J.C.
Format Journal Article
LanguageEnglish
Published England Elsevier Ltd 15.06.2019
IWA Publishing/Elsevier
Subjects
Environmental Sciences
Mechanical history
Organic matter
Rheology
Sludge
Organic matter
Sludge
Rheology
Mechanical history
MECHANICAL HISTORY
RHEOLOGY
ORGANIC MATTER
SLUDGE
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Summary:The rheological behavior is known to be of great interest in sludge treatment, but the material complexity induces strong measurement difficulties. The literature highlights two characteristics deeply impacting sludge rheological properties and their characterization: Thixotropic behavior and organic matter (Seyssiecq et al., 2003; Eshtiaghi et al., 2013), both being related to each other. Indeed, by looking at how thixotropy affects elastic modulus and yield stress with different mechanical histories at different organic matter ratios, it turns out that the higher the organic matter, the higher the thixotropic behavior. •Sludge solid properties are quantified according to the organic content.•Through the solid properties, sludge thixotropic behavior is evaluated.•The evolution of solid properties against the mechanical history is described.•A master curve of solid properties against mechanical history is obtained.
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ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2019.03.040