Full Description

Adequate filter bed expansion is critical to achieving an effective filter backwash.While this is a simple and well-known concept, many filter plant operators have not beenable to effectively incorporate bed expansion measurements into a filter backwashroutine. Accomplishing this task can be cumbersome, unless proper equipment,techniques, and guidance are provided. During Pennsylvania's 14-year history ofconducting over 1,000 detailed Filter Plant Performance Evaluations at 340 filter plants,Pennsylvania Department of Environmental Protection (DEP) staff have had theopportunity to perform countless filter bed expansion measurements. Over the years,DEP staff have observed common performance trends and have refined expansionmeasurement techniques to gather information that can be readily applied to operatorsacross the country. These experiences have enabled DEP staff to devise an inexpensiveand easy-to-construct device to measure bed expansion. This paper presents theinnovative construction and measurement techniques in their research paper, with thegoal of enabling filter plant operators to routinely conduct efficient bed expansionmeasurements. Includes 2 references, table, figures.

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Edition: Vol. - No. Published: 11/02/2003 Number of Pages: 16File Size: 1 file , 970 KB