A phosphate mine in Idaho has a 2000 gpm groundwater stream contaminated with selenium that must be treated prior to discharge. To minimize plant footprint, Frontier Water Systems integrated ultrafiltration (UF) and reverse-osmosis (RO) processes in conjunction with two SeHAWK® modular bioreactors. This innovative UF + RO + Bioreactor treatment configuration achieves high rate selenium removal from the stream, with the added benefit of an RO permeate stream to dilute the treated brine stream, allowing for contaminant removal to ultra-low levels. The plant has been fully operational since 2017 and continues to meet selenium discharge requirements for the customer.
