Use of Pilot Filters to Predict Optimum Chemical Feeds

Abstract

The objective of this study was to formulate and test a pilot filter system for the determination of optimum chemical dosages. The pilot filter was designed to indicate the minimum coagulant dosage required to produce a filter effluent of a given quality and the proper floc strength to maintain that quality throughout a filter run terminated by the development of maximum head loss. This pilot filter would have hydraulic and physical characteristics similar to full‐scale filters and would therefore be representative of the larger filters.