In May of 2018, an eastern power utility encountered an urgent need for a selenium removal system during the closure of one of their ash ponds. Frontier deployed a SeHAW® Mobile bioreactor which was deployed to site within 30 days of the order. While operational, the bioreactor experienced temperatures in the treatment stream as low as 35o F , and the system continued to reduce selenium below the required limits. Working in conjunction with an upstream absorbent media system, the system demonstrated compliance that could not have been met without the additional biological treatment.
SeHAWK® 250 gpm Eastern Ash Pond Closure
To comply with state and federal regulations, an Eastern US power utility required treatment for TSS, selenium, and other metals to properly decommission their coal ash water retention pond. The customer chose to purchase, rather than lease, a SeHAWK® Mobile bioreactor for future use at other sites.
The SeHAWK® unit was operated under a wide range of conditions and temperatures with a wide fluctuation in influent concentrations. Under these variable conditions, the system successfully removed nitrate, selenium and other contaminants of concern enabled the complete closure of the ash pond in 2019.
600 gpm Leasable SeHAWK®and UF Equipment Package for Eastern Ash Pond Closure
To comply with state and federal regulations, an Eastern US power utility required treatment for TSS, selenium, and other metals to properly decommission their coal ash water retention pond. The customer selected a leasable, mobile equipment package which provided a small footprint without upfront capital investment. A SeHAWK® Mobile bioreactor was implemented for selenium and metals removal in conjunction with two 300 gpm mobile UF containers for overall TSS removal. Treating over 18 million gallons of ash pond water, the SeHAWK® and UF mobile equipment surpassed discharge requirements, enabling project completion more than 2 months ahead of schedule.