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Renewable Energy from Waste

Even when materials can’t be recycled, they can still contribute to a cleaner energy future. At Casella, we capture landfill methane biogas and convert it into renewable energy that powers homes, fuels vehicles, and reduces greenhouse gas emissions across the Northeast.

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Indoor landfill gas-to-energy facility featuring multiple large yellow CAT generator engines connected to bright yellow and white piping labeled “GAS.” Overhead metal beams, ventilation ducts, and industrial lighting are visible across the ceiling, with concrete flooring throughout the space.

Landfill Gas-to-Energy

  • Row of industrial electrical control panels with multiple digital screens, labeled switches, indicator lights, and emergency stop buttons. Displays show system data and operational controls, including labels such as “LPS” and numbered sections. The panels are mounted on a gray metal enclosure inside a facility with concrete flooring.

Every active Casella landfill captures and repurposes methane gas to generate clean electricity. Today, four active and one closed facility supply gas-to-energy plants that produce enough renewable power for about 30,000 homes each year—reducing emissions and helping communities rely less on fossil fuels. This process turns a once-wasted byproduct into a renewable energy source, supporting both circular economy and climate leadership objectives outlined in Casella’s 2030 sustainability goals.


Renewable Natural Gas

  • Aerial view of a landfill gas-to-energy facility surrounded by green forest and grassy terrain. The site includes a rectangular beige building with rooftop vents, multiple gas processing units, and a gravel access road leading to the facility. Power lines and a water tower are visible in the background under a partly cloudy sky.

Casella is expanding its renewable natural gas production through partnerships that accelerate clean energy adoption. In collaboration with WAGA Energy, we’re developing RNG capacity at three landfill sites—expected to produce over 1.3 million MMBtu of renewable natural gas per year, enough to power more than 40,000 homes and businesses.

As this initiative scales, it will significantly reduce methane emissions and contribute to regional decarbonization—part of Casella’s broader commitment to sustainable operations and innovation.


Solar, Wind, and Geothermal

  • Rows of large solar panels installed on a sloped grassy field under a bright blue sky with scattered white clouds. The panels are arranged in multiple angled arrays along a dirt access path, with green hills and forested areas visible in the background.

Beyond landfill gas and RNG, Casella supports a diverse portfolio of renewable energy projects—from on-site solar arrays and wind turbines to one of the industry’s first landfill geothermal systems. These projects help transform waste facilities into clean energy hubs that contribute power back to local grids.

These smaller-scale initiatives demonstrate Casella’s holistic approach to sustainability—advancing renewable energy innovation across every stage of the waste lifecycle.

  • Infographic titled “Putting Waste to Work: Landfill Gas-to-Energy” explaining how waste creates biogas, how Casella collects biogas using wells and drones, and how biogas is converted into electricity. Includes illustrations of homes, landfill, gas collection system, and power lines, along with text boxes describing benefits such as powering homes and reducing waste impact.

  • Infographic showing how landfill waste produces biogas that is collected and converted into renewable natural gas for fuel and heating.