Premium
Particle Behavior in Deep‐Bed Filtration: Part 1—Ripening and Breakthrough
Author(s) -
Moran Daniel C.,
Moran Melissa C.,
Cushing Robert S.,
Lawler Desmond F.
Publication year - 1993
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.1551-8833.1993.tb06120.x
Subject(s) - filtration (mathematics) , sedimentation , softening , ripening , particle (ecology) , particle size , particle size distribution , lime , environmental science , effluent , filter (signal processing) , materials science , chromatography , environmental engineering , chemistry , mathematics , geology , engineering , composite material , statistics , sediment , metallurgy , geomorphology , food science , oceanography , electrical engineering
Laboratory‐scale filtration experiments were conducted using sedimentation basin effluent from a local lime‐softening water treatment plant. An electronic particle counter was used to observe changes in the particle size distribution of the filtrate as a function of filter depth and time under a variety of filter operating conditions. The experiments were conducted for an extended period (up to 48 h) to observe the effects of both ripening and breakthrough over the duration of a typical water treatment plant filter cycle. The results indicate that ripening and breakthrough are not distinct stages but occur simultaneously for different‐size particles. The effects of media size and filtration velocity were investigated, and simple normalizations were developed.