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Title:Regeneration of clinoptilolite by biologically restored brine
Author(s):Semmens, M.J.
Contributor(s):Klieve, Jeffrey; Porter, Paul; Booth, Alan; Schnobrich, Dana; Kartardjieff, Alexandra; University of Minnesota; University of Illinois at Urbana-Champaign
Subject(s):Water resources development
Water resources development--Illinois
Drinking water treatment
Ammonium removal
Geographic Coverage:Illinois (state)
Abstract:Previous studies demonstrated that ammonium saturated clinoptilolite may be regenerated by nitrifying bacteria if a base is added for pH control. The mechanism was identified to be ammonium release by ion exchange followed by nitrification of the liberated ammonium. In this study the ion exchange and nitrification processes were studied separately to identify the best procedure for effective regeneration. The regeneration of clinoptilolite with neutral pH brine was studied and its effectiveness was measured by comparing breakthrough curves for ammonium removal. In addition the column performance was evaluated using recycled regenerant to evaluate the impact of the buildup of Ca, Mg and K in the regenerant. Nitrification studies conducted with recycled regenerant allowed the kinetics of ammonium oxidation to be identified. Both dispersed and attached growth systems were investigated. The observed nitrification kinetics were comparable to those reported by other investigators for domestic wastewater treatment. The information provided in the report allows for the rational design of ammonium removal by clinoptilolite which is regenerated using biologically restored regenerant.
Issue Date:1979-02
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 1979 held by M.J. Semmens
Date Available in IDEALS:2016-04-25

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