Slide 1
Brickyard
LFG-to-RNG Facility
Illinois
One of the First U.S. Wastewater Utilities to Turn Biogas into Power and Thermal
Dallas Water Utilities WWTP (Biogas Cogen Facility), TX
Overview
Neogenyx Fuels developed, owns, and operates a biogas cogeneration facility at the Dallas Water Utilities’ Southside Wastewater Treatment Plant, one of the largest wastewater treatment operations in Texas serving ~2.5 million people. DWU was one of the first wastewater utilities in the U.S. to recycle biogas into electricity. The 4.2 MW facility captures methane generated during the sewage treatment process – transforming what was previously flared into on-site electricity and thermal load. The cogeneration approach utilizes ~80% of the biogas resource – more than double the efficiency of a typical electrical-only generation plant.
Solution & Benefits
The facility processes ~1,200 standard cubic feet per minute (SCFM) of biogas, feeding it into three engine-generators with heat recovery that cogenerate electricity and hot water – offsetting ~60% of the electricity DWU previously purchased from the grid while providing thermal energy to heat digester vessels. Achieving commercial operation in 2011, the plant saves the City ~$1.5 million annually in energy costs.
Beyond clean energy production, the cogeneration facility delivers significant benefits, including:
- Reduction of up to ~20,000 metric tons of CO₂ emissions annually
- Emissions reductions equivalent to ~4,600 gasoline-powered passenger vehicles driven for one year
- ~$1.5 million in annual energy cost savings for the City
- Generation of ~32,000 Renewable Energy Credits (RECs) per year
- No upfront capital cost or additional staffing requirements for the City
- Compliance support for Texas renewable energy requirements
Project Details
Solutions
Wastewater Biogas-to-Energy; Cogeneration Plant
Developer & Operator
Neogenyx Fuels
Partnership
City of Dallas Water Utilities (DWU)
Location
Dallas, Texas
End Use
On-site cogeneration of electricity and hot water
Commercial Operation
2011
~1,200 SCFM
Biogas Processing Capacity
4.2 MW
Installed Capacity
Up to ~20,000 MT
Annual CO₂ Emissions Reduction
~60% Offset
of DWU’s Grid-Derived Electricity
~$1.5 million
Annual Energy Cost Savings
~32,000 RECs
Renewable Energy Credits Generated Annually
Explore Plant Highlights
The official launch of Neogenyx Fuels is subject to the closing of the transaction between Ameresco, Inc. and HA Sustainable Infrastructure Capital, Inc.
