A western US municipality operates a reverse-osmosis drinking water plant that produces a brine stream with elevated selenium and nitrate. In order to comply with state regulations, the brine stream must be treated prior to being discharged to a local waterway. After completing a 2-month pilot study, Frontier Water Systems was selected to design and supply a treatment plant, centered around a SeHAWK® Link modular bioreactor. The SeHAWK® Link provides the customer with the flexibility for future expansion, a compact footprint, and easily integrates with the existing RO and various auxiliary equipment and treatment processes.
Since startup, the SeHAWK® has consistently removed nitrate to below detection limits and has removed selenium to below the stringent discharge limit of 4.6 ug/L. The success of the plant has enabled the municipality to attain greater independence of drinking water supplies, securing safe drinking water for current needs and future town growth.