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DOI : ,    Vol.5, No.4, 19 ~ 26, 1997
Title
Comparison of Breakthrough Characteristics in Tapered and Cylindrical Adsorbers
이승목Seung Mok Lee,김원기Won Gee Kim
Abstract
Adsorption on activated carbon is a very effective treatment method for removal of a broad spectrum of organic chemicals from water supplies and wastewater. Although GAC(granular activated carbon) treatment has been designated as BAT(best available technology) for the removal of several compounds. there are major technical and economic concerns that are forcing utilities to look at other alternatives including with the new regulations. Adsorption is typically carried out in fixed or pulsed beds in columns of constant cross section or in slurry reactors. Recent studies by the principal investigator has shown that adsorption efficiency can be increased substantially by a judicious selection of adsorbent size distribution and a variable cross section for the column. Under identical operating conditions, a reverse stratified tapered bed was shown to increase breakthrough time by 30% to 200% over the conventional cylindrical fixed bed for the solute-adsorbent system studied. Moreover, column pressure drops are lower for the RSTA than the conventional system. Water and wastewater plants processing large volumes of water can realize significant savings in capital and operating costs by utilizing this type of operation. This has wide ranging implications for adsorption technology and its applications in the processing of water and wastewater, hazardous waste and solid waste leachate treatment, and groundwater remediation.
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