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AWWA MTC57645
- Application of Actiflo Ballasted Flocculation as Pre-Treatment of Low-Pressure Membrane Systems
- Conference Proceeding by American Water Works Association, 03/05/2003
- Publisher: AWWA
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Recently, a number of high rate, high performance clarification processeshave come to prominence in drinking water treatment. Among these is the ballastedflocculation process marketed as ACTIFLO(R). This process combines high rate(clarification rates of 25gpm/ft2 and higher) with outstanding effluent quality (typicallyless than 1 NTU). These characteristics make ACTIFLO(R) an appealing match withmembrane filtration, in principle. However, concerns over membrane fouling arisingfrom polymer carryover have slowed the adoption of this process combination.The objective of the work described in this paper was to investigate the suitability ofACTIFLO(R) followed by submerged membrane filtration as a process for pre-engineeredwater treatment systems. The results of pilot testing this processcombination at three surface water treatment sites are described. Includes tables, figures.
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