Landfill Gas to Energy Project – Providence, Rhode Island

Location: Providence, Rhode Island
Date Completed: 2011

Project Scope

Venture Engineering & Construction was contracted to provide various engineering, design, procurement and equipment supply as part of an EPC contract for a new combined cycle landfill gas to energy facility at the Providence Landfill in Providence, Rhode Island. This project is a sister plant to the Olinda LFGTE located in Brea, California. Both projects were designed and built concurrently. Venture Engineering & Construction is part of a team providing EPC services for the project. The project includes four Solar Taurus Turbine Generators (T-60’s) with HRSG’s. The new combined cycle, merchant power plant produces 32.5MW of power for sale to the local grid. The turbines are fueled with 11,500 scfm of landfill gas. Project scope included:

Landfill gas blowers (75″ wc vacuum, 12 psig discharge)
Landfill gas compression (two stage, 12 psig suction, 260 psig discharge)
Swing compressor (serves as backup first or second stage compressor)
Landfill gas chiller (gas drying)
Ammonia Refrigeration (for compression systems)
Gas Conditioning System (remove unwanted landfill gas contaminants)
Power Island: four Solar Taurus T-60 turbine gensets with HRSGs.
Environmental systems: Oxidative and SCR catalysts (CO and NOx reduction, respectively)
Inlet air chilling PG&E interconnect

Services Provided

Venture provided detailed engineering and design of the above, plus engineering, fabrication and supply of Venture Engineering’s patent-pending landfill gas conditioning system (pictured above). Venture’s gas conditioning system removes unwanted and harmful organosilicon (siloxane) compounds, as well as moisture and H2S from the landfill gas prior to combustion. Siloxanes form silicon dioxide when combusted, which foul turbine blades as well as post combustion catalysts. This is the world’s largest landfill gas conditioning system (identical to Olinda LFGTE project).