Particle behavior in deep-bed filtration: Part 1 -- Ripening and breakthrough
- Hargis + Associates Inc., La Jolla, CA (United States)
- Malcolm Pirnie Inc., Carlsbad, CA (United States)
- Univ. of Texas, Austin, TX (United States). Dept. of Civil Engineering
Laboratory-scale filtration experiments were conducted using sedimentation basin effluent from a local lime-softening water treatment plant. Metals and synthetic organic chemicals are often adsorbed to particle surfaces. 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.
- OSTI ID:
- 5177176
- Journal Information:
- Journal of the American Water Works Association; (United States), Vol. 85:12; ISSN 0003-150X
- Country of Publication:
- United States
- Language:
- English
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