Case Study: Sheboygan Wastewater Plant achieves lower energy costs and clean power with Capstone Green Energy microturbines

Sheboygan Wastewater Plant - Customer Case Study

Sheboygan Wastewater Plant, a municipal wastewater treatment facility in Sheboygan, Wisconsin, needed a better way to manage excess methane from its anaerobic digester while also reducing rising electricity costs. To solve both challenges, the plant turned to Capstone Green Energy and its microturbine technology as part of a combined heat and power (CHP) approach.

Capstone Green Energy implemented 10 Capstone C30 MicroTurbines with heat recovery modules, plus gas-cleaning and compression systems, to convert waste methane into electricity and useful heat. The system generates up to 300 kW of power, helps maintain digester temperature, and heats plant buildings. Results included a stable electricity bill despite utility rate increases, 1,681 MWh of electricity and 61,000 therms of biogas valued at nearly $178,000 in 2007, plus additional revenue from Renewable Energy Credits.

Sheboygan Wastewater Plant

Dale Doerr

Superintendent