Case

Net-zero energy operations at WWTP

NISSEN energy

About Author

NISSEN energy supply services and products to ensures economical, beneficial production of sustainable energy – local and global.

See partner

The Downers Grove Sanitary District in Illinois has dedicated significant resources to reduce its energy footprint.

Improvements in process efficiency including plant automation, aeration system improvements, upgrades to HVAC and building management systems, and variable frequency drives have resulted in a 30% reduction in electricity usage at its wastewater treatment plant. The remaining electricity used by the facility is produced on-site using a biogas driven combined heat and power system. Biogas is produced by co-digesting hauled food waste and sewage sludge generated on-site. The biogas is used as fuel to drive an engine-driven electric generator. Furthermore, heat recovery in the form of circulating hot water is used for plant process heat. The CHP plant was installed in 2017 with a payback time of 3.5 years. Total Infrastructure investments of roughly USD 5 million are expected to have a 10-year payback period.

Did you like this solution?

NISSEN energy
  • 1 Solutions
Primary contact
Thorvald Pedersen
004575756500

Looking for our logo?

Find it in the State of Green Toolbox together with loads of materials to help you promote Denmark’s green solutions abroad.
Visit toolbox