Framingham energy management company Ameresco is working with the Philadelphia Water Department on a wastewater biogas-to-energy plant.
The $47.5-million plant will be fueled mostly by biogas produced by the wastewater system and will produce electricity and thermal energy for use on site. Ameresco said it's expected to generate 5.6 megawatts of power and reduce the plant's energy costs by more than $12 million over 16 years.
Ameresco will design, build and maintain the plant. The project will be partially funded through an American Recovery and Reinvestment Act grant, with financing from Merrill Lynch's energy services unit.