Pilot-Scale Evaluation of Bicarbonate-Form Anion Exchange for DOC Removal in Small Systems

Alysse Ness, Treavor Boyer

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

This article highlights results from an ion exchange (IX) pilot-plant study that evaluated bicarbonate-form anion exchange resin (AER) with sodium bicarbonate (NaHCO3) regeneration for dissolved organic carbon (DOC) removal. Sodium chloride (NaCl) is the conventional regeneration salt; however, NaHCO3 could be used as an alternative to reduce the environmental impacts associated with NaCl brine disposal. In a comparison of chloride-form AER and bicarbonate-form AER, results indicated that chloride-form AER and bicarbonate-form AER have a similar affinity for DOC; chloride-form AER treats more bed volumes before breakthrough than bicarbonate-form AER; chloride-form AER is regenerated 10–48% more efficiently with NaCl compared with bicarbonate-form AER regenerated with NaHCO3; polyacrylic AER is regenerated more efficiently than polystyrene AER using both NaCl and NaHCO3; and the total cost of using NaCl and NaHCO3 is comparable when brine disposal is considered. Results from this study provide guidance for small water systems considering IX treatment.

Original languageEnglish (US)
Pages (from-to)13-26
Number of pages14
JournalJournal - American Water Works Association
Volume109
Issue number12
DOIs
StatePublished - Dec 1 2017

Keywords

  • Anion Exchange
  • bicarbonate, brine disposal
  • Brines
  • Dissolved Organic Carbon
  • ion exchange
  • Ion Exchange
  • pilot
  • Pilot Plants
  • Regeneration
  • Resins
  • Small Water Systems
  • Sodium Chloride

ASJC Scopus subject areas

  • Chemistry(all)
  • Water Science and Technology

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