A southern power utility evaluated a SeHAWK® bioreactor for selenium, nitrate, arsenic, and mercury removal of FGD blowdown water through a long-term pilot trial. This pilot trial included Frontier-provided iron co-precipitation pretreatment.
The pilot demonstrated sustained, long-term, compliance with 2019 ELG standards. Additionally, the pilot underwent two, extended 5-week shutdowns to explore the effects on system performance, demonstrating effective recovery from each of these shutdowns.