BOROUGH PROJECT SPOTLIGHT: PXVNEO - New Energy Optimization is the revolutionary wastewater treatment plant in Phoenixville. Phoenixville is the first municipality in all of North America to use the hydrothermal carbonization process to treat the communities wastewater. More than a wastewater treatment plant, PXVNEO is a resource recovery system. PXVNEO’s first phase will see the Borough’s wastewater treatment transformed from anaerobic digestion to hydrothermal carbonization or HTC.