title: Rheological characteristics of the cationic polyelectrolyte flocculated wastewater sludge.
abstract: The rheological characteristics of the wastewater sludge were investigated by using a Haake Rheostress RS 75 rheometer. The stress-sweep experiments and the small-amplitude-oscillatory-shearing (SAOS) tests were conducted. The stress-sweep measurements demonstrate that addition of polymer coagulants to sludge samples could significantly influence the corresponding complex shear modulus G*. Furthermore, the SAOS tests indicate that the sludge samples treated with polymer coagulants will form more rigid structures. The original sludge samples mostly show typical viscoelastic liquid-like behavior. However, the solid-like behaviors were always observed in the samples treated with polymers.
authors.affiliation: Department of Chemical Engineering, National Cheng Kung University, 1, Tainan 70101, Taiwan, ROC.
authors.forename: Bing-Hung
authors.initials: BH
authors.lastname: Chen
authors.forename: Sue-Jean
authors.initials: SJ
authors.lastname: Lee
authors.forename: D J
authors.initials: DJ
authors.lastname: Lee
mesh_terms: D004548:Elasticity; D005427:Flocculation; D011073:Polyamines / Q000737:chemistry*; D000071228:Polyelectrolytes; D011108:Polymers / Q000737:chemistry; D012212:Rheology; D012722:Sewage / Q000737:chemistry*; D014783:Viscosity; D014872:Water Movements
chemical_list: D011073:Polyamines; D000071228:Polyelectrolytes; D011108:Polymers; D012722:Sewage