State of Green
Summary
Downers Grove Sanitary District (DGSD) is responsible for the treatment of wastewater from seven cities and more than 60,000 residents and industrial customers. The wastewater treatment plant set the goals of operating as a net-zero facility as well as becoming more cost-efficient, but this was a challenge as no renewable energy recovery measures were in place.
The road to optimizing Downers Grove Sanitary District cost-efficiency and reaching energy neutrality began with installing a CHP system in 2013. To further increase their energy production and achieve net-zero, they installed the NISSEN Energy NPM375 CHP system and an accompanying ventilation system in 2017. In 2020 the first CHP from 2013 was exchanged with another highly efficient NISSEN 375 kW CHP. The wastewater treatment plant also installed a food waste receiving station and were able to increase biogas production, which they used for electricity generation and digester heating in the CHP.
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