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Title:Study of the treatment of Lake Michigan water using direct filtration
Author(s):Letterman, Raymond D.
Contributor(s):Illinois Institute of Technology; Tanner, Roy D.; Reddy Sama, Rami; DiDomenico, Edward; Burgarino, Anthony E.; Kulprapha, Pranee; Chay, Shin-Chang
Subject(s):Water resources development
Water resources development--Illinois
Drinking water treatment
Water treatment
Direct filtration
Lake Michigan
Geographic Coverage:Illinois (state)
Abstract:The direct filtration process can be an effective and economical alternative to the conventional sequence of operations used for water clarification. In most cases the process has been used to treat water with a consistently low turbidity. Its effectiveness in other cases, e.g., treating water from Lake Michigan, will require a thorough understanding of process behavior and control techniques. Pilot plant studies were performed using a constant-rate dual-media filter preceded by a pretreatment reactor in which a cationic polyelectrolyte coagulant was added. For each filter design and set of operating conditions there is an optimum distribution of deposit within the filter bed at run termination which maximizes the water production per filter run. It was determined that the pretreatment conditions (the polyelectrolyte concentration and the mixing intensity and duration) can be used to maximize the water production per filter run and maintain an acceptable effluent turbidity. The pretreatment conditions determine the rate of clogging front advancement in the filter bed, which, in conjunction with the terminal headloss, determines the distribution of deposit within the bed at run termination.
Issue Date:1975-06
Publisher:University of Illinois at Urbana-Champaign. Water Resources Center
Genre:Report (Grant or Annual)
Sponsor:U.S. Department of the Interior
U.S. Geological Survey
Rights Information:Copyright 1975 held by Raymond D. Letterman
Date Available in IDEALS:2016-04-25

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