The District’s new cogeneration facility produces up to 1.7 MW of energy, utilizing the biogas generated by USD’s treatment processes to generate power for its 33 acre (15 ha) treatment plant.
Taking almost two years to construct at a total cost of $14.5 million, the project includes two 850 kW engine generators. The District anticipates savings of up to $1.6 million annually on its power bills.
Commenting on the move, USD General Manager Paul Eldredge said: ‘Wastewater treatment is an energy-intensive process, and we’re always looking for ways to reduce our operational expenses. At about $2 million per year, power costs are a significant portion of our budget. This investment in larger, more efficient cogeneration units continues our stewardship of the environment, and helps us keep rates low for our customers.’