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AWWA WQTC50388
- Application of Ballasted Flocculation in Recycling Filter Backwash Wastewater
- Conference Proceeding by American Water Works Association, 01/01/1999
- Publisher: AWWA
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The key behind the ballasted flocculation process is the use of continuously recycled ballast or fine sand, which attaches to flocculated particles through a polymer bridge. Very high settling velocities combined with rapid flocculation kinetics lead to plant footprints less than 1/10th of conventional treatment processes. This paper reviews the background theory associated with ballasted flocculation and presents the process approach and performance results from a filter backwash recovery installation. Includes 6 references, tables, figures.