Salt-water recycling for brine production at road-salt-storage facilities

G. Michael Fitch, Vinka Oyanedel-Craver, Shannon L Bartelt-Hunt, Megan Fuller, James A. Smith

Research output: Contribution to journalArticle

Abstract

This research investigates the storm-water quality at road-salt-storage facilities located at Virginia Department of Transportation (VDOT) winter maintenance locations and investigates the feasibility of a sustainable solution to better manage the salt-contaminated storm-water runoff. Collection ponds are currently used at most salt-storage sites to contain highly saline runoffand prevent its release into the environment. During a synoptic, winter-time sampling, chloride-ion concentrations in these ponds were found to be significantly greater than state and federal regulatory guidelines for surface-water-quality criteria, with individual values exceeding 2000 mg/L. The pond water is currently treated as a waste product by VDOT, resulting in significant costs for disposal. However, this saline pond water can potentially be recycled to produce concentrated brine solutions, which can then be used by VDOT for either prewet-ting dry salt during application to roadways or for direct brine application. Laboratory and field tests have been performed using a bench-scale brine generation system to quantify the effects of hydraulic retention time, temperature, and influent-water quality on system performance. Results of these studies have found that the storm-water runoffcaptured in collection ponds requires no pretreatment before entering the brine generation system and can effectively produce brine at the target salt concentration. Results of a cost-benefit analysis indicate that it is possible under multiple scenarios to recover the investment capital ofimplementing brine generation at all VDOT winter maintenance locations, typically within a 4-year horizon.

Original languageEnglish (US)
Pages (from-to)565-575
Number of pages11
JournalEnvironmental Progress and Sustainable Energy
Volume28
Issue number4
DOIs
StatePublished - Dec 1 2009

Fingerprint

Water recycling
Saline water
Ponds
salt water
brine
recycling
Salts
pond
Water quality
salt
Water
water quality
winter
Tolnaftate
Cost benefit analysis
water
Runoff
Surface waters
cost-benefit analysis
Hydraulics

Keywords

  • Chloride
  • Road salt
  • Stormwater run off
  • Winter maintenance

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Water Science and Technology
  • Waste Management and Disposal
  • Environmental Science(all)

Cite this

Salt-water recycling for brine production at road-salt-storage facilities. / Fitch, G. Michael; Oyanedel-Craver, Vinka; Bartelt-Hunt, Shannon L; Fuller, Megan; Smith, James A.

In: Environmental Progress and Sustainable Energy, Vol. 28, No. 4, 01.12.2009, p. 565-575.

Research output: Contribution to journalArticle

Fitch, G. Michael ; Oyanedel-Craver, Vinka ; Bartelt-Hunt, Shannon L ; Fuller, Megan ; Smith, James A. / Salt-water recycling for brine production at road-salt-storage facilities. In: Environmental Progress and Sustainable Energy. 2009 ; Vol. 28, No. 4. pp. 565-575.
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