Framework for evaluating sorbent usage rate of various sorption column configurations with and without bypass blending

Benjamin A. Stewart, Christian W. New, Ahmed A. Hosni, Bruce I. Dvorak

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

This study evaluated the system performance in terms of sorbent usage rate (SUR) of single column, two-column parallel, and lead-lag configurations, both with and without bypass blending, based on two normalized parameters describing the breakthrough profile (mass transfer zone length to lag ratio, or MTZ:Lag) and treatment objective (C/Co). The pore surface diffusion model was used to simulate a range of single compound scenarios to develop a framework for comparing configurations. From this analysis, regions on a MTZ:Lag versus C/Co plot could be identified in which particular configurations yielded the lowest system SUR. At low MTZ:Lag ratios, bypass blending (single column or lead-lag operation) offered significant improvements because of the ability to bypass untreated flow and reduce sorbent bed mass. However, at low target C/Co values, bypass offered little improvement. Lead-lag without bypass performed best at high MTZ:Lag ratios by passing the mass transfer zone through two columns in series. At high MTZ:Lag ratios and high target C/Co values, two-column parallel configurations yielded significant benefits by blending high and low concentration effluents and improving sorbent utilization.

Original languageEnglish (US)
Pages (from-to)554-563
Number of pages10
JournalJournal of Environmental Engineering (United States)
Volume139
Issue number4
DOIs
StatePublished - Apr 1 2013

Keywords

  • Activated carbon
  • Drinking water
  • Fixed-bed models
  • Sorption
  • Water treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Environmental Chemistry
  • Environmental Science(all)

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