Great River Energy (GRE) operates a power plant in the City of Elk River which generates electricity by incinerating municipal solid wastes. The plant is located proximate to the City of Elk River wastewater treatment plant (WWTP). This project will result in a corresponding reduction of groundwater use by GRE.
The St. Cloud Waste Water Treatment Facility (SCWWTF) is currently conducting long term planning for future biosolids management. The most likely path forward includes dewatering of the digested biosolids, which will produce a supernatant stream with significant phosphorus and ammonia loads that would be returned to the liquids treatment portion of the WWTF. Returning these nutrient loads to the liquids train would result in increases to effluent concentrations, increases in power consumption, or both.