Replacing Aging Infrastructure With Renewable Power

Replacing an Idle Asset With Productive, Low-Carbon Infrastructure

A South Carolina landfill operator set out to replace a long-offline landfill gas-to-energy (LFGTE) facility with a new renewable natural gas (RNG) plant designed for modern performance and long-term value. The objective was to process approximately 2,000 standard cubic feet per minute of landfill gas containing 45–50% methane and deliver pipeline-quality RNG into a local natural gas system, supporting both sustainability goals and regional energy supply.

RESPEC provided integrated planning, design, and permitting services to move the project from concept to a build-ready facility. The work focused on creating a system that safely and reliably converts landfill gas into usable energy while meeting environmental and regulatory requirements and minimizing disruption to ongoing landfill operations.

The scope of work included landfill gas conveyance and control system design; land development, environmental, and airpermitting; and geotechnical investigation. also completed a mechanical process simulation to support system sizing and performance expectations. Building on that foundation, the team delivered full structural, mechanical, electrical, process instrumentation, and SCADA design for the RNG facility, along with gas delivery and condensate management systems required for dependable operation and pipeline interconnection.

From Waste Stream to Working Energy

The completed design provides a clear path to converting landfill gas into a reliable renewable energy source while replacing aging, inactive infrastructure. For the client, the project supports greenhouse gas reduction commitments, improves utilization of an existing waste stream, and reduces long-term costs through shared capital investment and sustained gas production—demonstrating how practical engineering can turn environmental responsibility into durable infrastructure.