Rock Products

NOV 2014

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The Lafarge Brookfield plant in Nova Scotia has been deemed a "viable disposal solution" for getting rid of treated hydraulic fracturing waste‐ water being held in storage ponds at Atlantic Industrial Services (AIS) in Debert, reported the Truro Daily News. The pilot project, approved last April by the Nova Scotia Department of Environment, permitted the transport of 2 million liters of treated wastewater from the AIS holding ponds for use as a coolant in the kiln at the cement plant, where it was evaporated at 700 C. "When I met with the community last April, I said that we would up‐ date people on the results of the pilot and making the results avail‐ able online is a good way to keep everyone informed," Environment Minister Randy Delorey said in a news release. "I'm pleased with the findings from the pilot. The results confirm that evaporation provides Nova Scotians with a viable disposal solution." Before being evaporated in the kiln, the wastewater had been treated for naturally occurring radioactive ma‐ terials (NORMS) and put through re‐ verse osmosis. The water was analyzed and met the Canadian Council of Environment Ministers and Health Canada guidelines for re‐ lease into a freshwater source. As part of the project, Lafarge con‐ ducted water testing before, during and after evaporation. The tests showed comparable re‐ sults for cooling water normally used by the plant from Shortts Lake, near Truro, and the wastewater from the holding ponds at AIS. The Department of Environment has received a request for authorization from AIS to remove and treat an‐ other 5 million liters at the Brook‐ field plant. A decision will be announced soon. If approved, any terms and conditions would be the same as the pilot project, requiring dual treatment of the wastewater before evaporation. There are 10 million liters remaining in two ponds at the company's Debert site. Triangle Petroleum also has 20 mil‐ lion liters of wastewater in two holdings ponds in Kennetcook, Nova Scotia. The wastewater in both areas is from high‐pressure hydraulic frac‐ turing that took place in 2007 and 2008. The results from the pilot project are available at www.novascotia.ca /nse/pollutionprevention/pubs.asp. ROCKproducts • NOVEMBER 2014 www.rockproducts.com 46 Lafarge Plant 'Viable' Solution for Fracking Wastewater

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