Rheological Behavior of Wastewater Sludge Following Cationic Polyelectrolyte Flocculation

Autor:	D. J. Lee, Bing Hung Chen, Sue Jean Lee, L. Spinosa
Rok vydání:	2006
Předmět:	chemistry.chemical_classification Flocculation Materials science General Chemical Engineering Rheometer Polymer Viscoelasticity Shear (sheet metal) Rheology Creep chemistry Kelvin–Voigt material Geotechnical engineering Physical and Theoretical Chemistry Composite material
Zdroj:	Drying Technology. 24:1289-1295
ISSN:	1532-2300 0737-3937
DOI:	10.1080/07373930600846507
Popis:	The rheological characteristics of the wastewater sludge were investigated by using a Haake Rheostress RS 75 rheometer. The shear creep compliance experiments and the dynamic viscosity measurements were conducted. The shear creep compliance experiments indicate the addition of polymer coagulants to the sludge samples will form more rigid structures. The elastic solid-like behaviors were always observed in the samples with polymers. The Voigt model was successfully employed in modeling the viscoelastic retardation behavior of sludge samples in the shear creep compliance tests. Moreover, the dynamic viscosity curves of the sludge samples with/without polymer could be described by the power law model of Ostwald and de Waele at the medium shear rates, ca. 100–300 s−1. Consequently, addition of polymer to the sludge tends to extend the applicable ranges of the shear rates for the power law model as well as to decrease the power law index.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::152a159bd434f94dd66865112b896be5 https://doi.org/10.1080/07373930600846507 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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