Case Study: City of Dallas achieves 30M kWh/year renewable power and major carbon reduction with Ameresco's 4.2 MW biogas CHP

City of Dallas - Customer Case Study

The City of Dallas faced rising energy costs and state mandates to reduce energy consumption and increase renewable energy use, while a portion of wastewater biogas was being flared instead of used. To meet these goals without significant up-front capital outlay, the City of Dallas entered a 20-year lease and PPA with Ameresco to deploy a cogeneration/combined heat and power (CHP) solution that would turn biogas into usable energy and heat.

Ameresco designed, permitted, constructed, owns and now operates a 4.2 MW CHP facility at the Southside Wastewater Treatment Plant that feeds three generators with biogas and captures engine heat for digester hot water. The Ameresco project produces roughly 30,000,000 kWh annually, about 30,000 RECs per year, and cuts CO2 emissions by an estimated 36,429 metric tons annually, while guaranteeing a minimum supply of electricity and hot water, lowering the City’s exposure to grid price spikes and operational risk.

City of Dallas

Richard Wagner

Senior Program Manager