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Optimizing Ballasted Sedimentation for Organics‐Laden Surface Water
Author(s) -
Pierpont John W.,
Alvarez Matt
Publication year - 2005
Publication title -
opflow
Language(s) - English
Resource type - Journals
eISSN - 1551-8701
pISSN - 0149-8029
DOI - 10.1002/j.1551-8701.2005.tb02726.x
Subject(s) - clarifier , sedimentation , environmental science , flocculation , surface water , water treatment , environmental engineering , geology , sediment , paleontology
This is the second of two articles about ballasted sedimentation, an alternative to conventional flocculation and sedimentation to treat highly colored surface water supplies. The article discusses Tampa Water Department's (TWD) experience with adding ballasted sedimentation to its David L. Tippin Water Treatment Plant in 2001 to resolve operational issues with carryover of the organic floc. The article discusses testing alternatives that included: lamella tube size; sludge rake speed; maturation mixer speed and blade elevation; microsand size; injection mixer rotation; and, loading rate of the ballasted clarifier. Test results for each component and actions taken to improve performance are provided.