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Sedimentation Success From Modified Jar Tests
Author(s) -
Reed Gregory D.,
Reece David A.
Publication year - 1984
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1984.tb05375.x
Subject(s) - sedimentation , settling , structural basin , flocculation , environmental science , filtration (mathematics) , residence time (fluid dynamics) , hydrology (agriculture) , environmental engineering , geology , geotechnical engineering , mathematics , geomorphology , statistics , sediment
Delivery of clear water from settling basins to filtration systems is important for the smooth operation of a treatment plant. But operators work at a disadvantage when they cannot determine what is happening during the sedimentation process. Incomplete settling allows turbid outflows to reach filters, shortening their runs and adding to water quality costs. A modified jar test method for modeling basin behavior has been designed. It uses a hydraulic comparison equation sensitive to basin flow rates, water residence times, and flocculant dosages. When properly calibrated, it can reflect actual basin performance, detect problems, and point to areas where solutions may be found.