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High floc strength with aged polyelectrolytes

Gray, Stephen R, Becker, N. S. C, Booker, N. A and Davey, A (2007) High floc strength with aged polyelectrolytes. Colloids and surfaces A: physicochemical and engineering aspects, 298 (3). pp. 262-266. ISSN 0927-7757

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The ageing of powdered polyelectrolyte solutions has shown that while the viscosity of these solutions decreases rapidly with time, the flocculation performance and the strength of the flocs produced does not alter over periods >200 days. This was shown for polyacrylamides of cationic, anionic and non-ionic charge. The use of tap or deionized water did not adversely affect the results unless a biocide capable of associating with the polyelectrolyte was added. These results contradict the common belief that solutions made with powdered polyelectrolytes should not be stored for long periods of time as their performance decreases after being stored for several days. The results indicate that powdered polyelectrolyte solutions are suitable for intermittent process operations, such as sewer overflow treatment and that dosing and handling of the solutions can be made easier by ageing of the solutions.

Item Type: Article
Uncontrolled Keywords: polyelectrolyte, ageing, floc strength, sewage
Subjects: Historical > RFCD Classification > 290000 Engineering and Technology
Historical > Faculty/School/Research Centre/Department > Centre for Environmental Safety and Risk Engineering (CESARE)
Depositing User: Ms Marcia Millard
Date Deposited: 20 Apr 2009 16:49
Last Modified: 23 May 2013 16:41
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Citations in Scopus: 0 - View on Scopus

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