Feasibility study of an electrodialysis system for in-home water desalination in urban India

Kishor G. Nayar, Prithiviraj Sundararaman, Catherine L. O'Connor, Jeffrey D. Schacherl, Michael L. Heath, Mario Orozco Gabriel, Sahil R. Shah, Natasha C. Wright, Amos G. Winter, V

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

Poor quality of drinking water delivered to homes by state utilities, and a large reliance on brackish ground water resources in parts of urban India, has resulted in the adoption of in-home water treatment solutions. The only existing in-home water treatment solution capable of desalination is reverse osmosis (RO). However, existing RO products can recover only 25–50% of the feed water supplied as usable product water. In this study, an alternative solution that relies on electrodialysis (ED) was designed and experimentally shown to achieve a recovery of 80%, producing 12 L/h of water at the desired salinity of 350 ppm from a feed salinity of 3000 ppm. The cost and size of the proposed system were also found to be comparable to existing in-home RO systems. In-home ED water treatment systems could compete with existing RO products while providing the advantage of improved water-conservation in water-stressed India.

Original languageEnglish (US)
Pages (from-to)38-46
Number of pages9
JournalDevelopment Engineering
Volume2
DOIs
StatePublished - Feb 15 2016
Externally publishedYes

Keywords

  • Brackish water
  • Desalination
  • Electrodialysis
  • Reverse osmosis

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