Premium
Changes in particle size distributions in batch flocculation
Author(s) -
Lawler Desmond F.,
Izurieta Edmundo,
Kao CheinPing
Publication year - 1983
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.1551-8833.1983.tb05245.x
Subject(s) - flocculation , sedimentation , particle size , particle (ecology) , particle size distribution , mechanics , velocity gradient , environmental science , materials science , chemistry , physics , environmental engineering , geology , oceanography , paleontology , sediment
Batch flocculation experiments were performed to test a previously developed model for the changes in particle size distribution. Within each experiment, time was the only independent variable; between experiments, the velocity gradient, particle concentration, and chemical conditions were varied independently. Detailed measurements of the particle size distribution were made, and the extent of change caused by each variable was quantified. The effect of time, concentration, and chemical conditions were reasonably well explained if partial sedimentation was allowed in the model. The effect of the velocity gradient was greatly overestimated by the model, suggesting that current understanding of particle collisions caused by fluid motion is weak.