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Integral Water Treatment Plant Design: From Particle Size to Plant Performance

TitleIntegral Water Treatment Plant Design: From Particle Size to Plant Performance
Publication TypeBook Chapter
Year of Publication1980
AuthorsLawler DF, O'Melia CR, Tobiason JE
Book TitleParticulates in Water: Characterization, Fate, Effects, and Removal
Series VolumeAdvances in Chemistry Series No. 189
PublisherAmerican Chemical Society
CityWashington, D.C.
ISBN Number9780841223714

Particle concentration and size distribution in raw water have extensive and complex effects on the performance of individual treatment units (flocculator, sedimentation tank, and filter) and on the overall performance of water treatment plants. Mathematical models of each treatment unit were developed to evaluate the effects of various raw water characteristics and design parameters on plant performance. The flocculation and sedimentation models allow wide particle size distributions to be considered. The filtration model is restricted to homogeneous suspensions but does permit evaluation of filter ripening. The flocculation model is formulated to include simultaneous flocculation by Brownian diffusion and fluid shear, and the sedimentation model is constructed to consider simultaneous contacts by Brownian diffusion and differential settling. The predictions of the model are consistent with results in water treatment practice.