Rockford, IL

Ballard Engineering with the Rock River Water Reclamation District designed and built a dual fuel 2,475 KW Natural Gas / Digester Gas powered Combined Heat and Power facility. The system provides maximum flexibility to the facility by its capacity to operate the entire facility independent of the utility automatically if necessary, provide all process heating requirements thru heat recovery from water jacket and exhaust, and switch fuels on the fly based on digester gas availability. Typical operation is one of the three engines operating 24 / 7 on digester fuel, with the remaining two engines operating 9 am to 6 pm Monday thru Friday.