Recycling of Salt-Contaminated Storm Water Runoff for Brine Production at Virginia Department of Transportation Road-Salt Storage Facilities

Abstract

A large part of the Virginia Department of Transportation's (DOT) maintenance effort comprises the implementation of its anti-icing program. Earlier research confirmed that Virginia DOT captures a large volume of salt-laden storm water runoff at its 300-plus salt storage facilities throughout the state and that disposal options for this water are limited and costly. Although Virginia DOT is implementing recommended management options to reduce the quantity of salt water captured, this research was undertaken to determine the possibility of recycling salt-contaminated storm water runoff for brine production. Laboratory and field tests were conducted using bench-scale brine generation equipment. In the laboratory phase, brine was produced by using tap water, applying different hydraulic retention times and temperatures. Storm water runoff from a storage pond without any previous treatment was used in the field phase. Results show that the optimum conditions for brine production are low hydraulic retention time (high flow rates) and high temperatures. The total suspended solids present in the storm water runoff did not diminish the quality of brine in the field tests. Economic and environmental benefits can be obtained by applying this recycling strategy.

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“…Si programa yra naudojama Niujorko valstijoje, jos tikslas -sumazinti prieziüros kainas, keliii uzdarymo laiko, avaringumo bei gerinti matomumo, apsaugoti kelius nuo pustymo ir saugoti juos nuo apledèjimo. Taip yra siekiama gerinti nacionaliniii ir magistraliniii keliii kontrolç ziemos solygomis (Chen et al 2009). …”

Runoff water loaded with road de‐icing salts: Occurrence, environmental impact and treatment processes

“…Another potential strategy for mitigating the adverse effects of road de-icing salts is to recover and recycle the salt. This can be achieved by installing drainage basins near road lanes to capture runoff water containing road de-icing salts (Craver et al, 2008).…”

Research of Snow Melting Materials Performance Efficiency for Road Winter Maintenance

“…However, the excess use of chloride deicer can cause soil and water pollution, corrosion of concrete structures, and spalling of concrete pavement. Based on the increasing requirements in the field of traffic safety, environmental protection and ecology, it is necessary to search for the most effective and less damaging measures to ensure road maintenance in winter (Ružinskas et al 2016;Kazlauskienė et al 2013;Craver et al 2008;Strong, Shi 2008;Ye et al 2009).…”