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Backwash Investigation and a Proposed Simple Uniformity Control
Author(s) -
Hirsch A. Adler
Publication year - 1968
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.1551-8833.1968.tb03582.x
Subject(s) - filter (signal processing) , simple (philosophy) , process (computing) , sample (material) , control (management) , mathematics , computer science , control theory (sociology) , environmental science , chromatography , chemistry , artificial intelligence , philosophy , epistemology , computer vision , operating system
The objectives of this study were to examine backwash characteristics, investigate some of the dynamics of the washing process, determine the effect of bed structure, and contribute to the theory of filter design. The method of investigation consists of the determination of the amount of suspended matter contained in the washings sampled at various key positions over the filter throughout the duration of a backwash. Strategic points selected for catchment are the troughside bottom (where cleansing is most complete), the intertrough median (where floc removal is reduced sharply), a corner (where wash is notoriously sluggish), and a composite sample at the sewer.