Treatment of basal water using a hybrid electrodialysis reversal-reverse osmosis system combined with a low-temperature crystallizer for near-zero liquid discharge

Kavithaa Loganathan, Pamela Chelme-Ayala, Mohamed Gamal El-Din

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Basal aquifer water is saline groundwater that often needs to be dewatered prior to mining. The oil sands industry is seeking cost-effective methods to treat basal aquifer water in order to allow its recycle to the bitumen extraction process. A hybrid desalination system consisting of advanced electrodialysis reversal (EDR)-reverse osmosis (RO) combined with a low-temperature evaporator/crystallizer was assessed as an opportunity to treat basal aquifer water for a near-zero liquid discharge (ZLD) approach. The pilot-scale plant had a capacity of 50m3/day influent. Pretreatment through sedimentation and ultrafiltration proved to be effective in removing both suspended solids and turbidity. The hybrid EDR-RO desalination system achieved about 77% recoveries, with brine concentrations up to 125,000mg/L. The results showed that the evaporator-crystallizer was able to concentrate the EDR-RO brine to a conductivity of just over 250mS/cm, while producing additional freshwater. This proof-of-concept study demonstrated that the hybrid EDR-RO system combined with a low-temperature evaporator/crystallizer was an effective near-zero ZLD approach to produce freshwater and minimize brine discharge when treating basal aquifer water.

Original languageEnglish
Pages (from-to)92-98
Number of pages7
JournalDesalination
Volume363
DOIs
Publication statusPublished - 1 May 2015
Externally publishedYes

Fingerprint

Crystallizers
Electrodialysis
Reverse osmosis
Aquifers
Discharge (fluid mechanics)
Evaporators
aquifer
brine
liquid
asphalt
Water
Liquids
Desalination
desalination
water
Temperature
Oil sands
Saline water
oil sand
bitumen

Keywords

  • Basal aquifer water
  • Crystallizer
  • Electrodialysis reversal
  • Oil sands
  • Reverse osmosis

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Water Science and Technology
  • Mechanical Engineering

Cite this

Treatment of basal water using a hybrid electrodialysis reversal-reverse osmosis system combined with a low-temperature crystallizer for near-zero liquid discharge. / Loganathan, Kavithaa; Chelme-Ayala, Pamela; Gamal El-Din, Mohamed.

In: Desalination, Vol. 363, 01.05.2015, p. 92-98.

Research output: Contribution to journalArticle

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