The GraniteFuel Blending System provides precise control of gas composition and flow within biogas and renewable natural gas (RNG) upgrading facilities. By automatically managing the ratio of multiple gas streams, the system ensures stable feed conditions for upgrading, combustion, or injection. This balance improves process performance, protects downstream equipment, and maximizes overall energy recovery efficiency.
Designed to integrate with all GraniteFuel Conditioning and Upgrading Systems, the Blending System plays a key role in maintaining consistent methane concentration and quality across fluctuating feedstocks and operating conditions. Whether managing multiple digesters, landfill wells, or storage sources, it delivers smooth, automated gas blending for safe and reliable operation.
Key Features and Benefits of the Blending System
Automated gas composition control
The system measures gas quality in real time and adjusts blend ratios automatically to maintain desired methane and contaminant levels. This ensures consistent gas properties entering upgrading or combustion systems.
Compatible with multiple gas sources
The Blending System can combine gas streams from digesters, landfills, or auxiliary sources such as natural gas. The control system allows independent valve modulation for each source to achieve precise blending performance.
Improved process stability
By controlling the inlet composition to upgrading and compression systems, the Blending System prevents fluctuations that can affect membrane performance, catalyst life, and compressor load. This results in smoother operation and reduced maintenance.
Integrated flow and pressure management
Flow meters, control valves, and automated feedback loops maintain uniform pressure and distribution across the gas network. This prevents surges and supports efficient coordination with the Process Gas Compression System.
Built-in safety and monitoring
Continuous measurement of methane concentration, pressure, and temperature ensures safe blending operation. The system automatically responds to deviations to maintain compliance with safety standards.
Modular skid-mounted design
Each Blending System is delivered as a complete skid with instrumentation, valves, and controls preassembled. The modular layout allows easy expansion or integration into existing plant infrastructure.
Blending System Applications in Biogas and RNG Projects
Agricultural Biogas and Farm Digesters
Farm-based RNG facilities often operate multiple digesters or variable feedstocks. The Blending System balances gas composition between units to deliver a uniform feed for upgrading, ensuring consistent gas quality and maximizing methane yield.
Wastewater Treatment and Municipal Facilities
At municipal wastewater plants, blending stabilizes biogas flow and methane concentration before upgrading or power generation. This improves equipment uptime and helps utilities meet performance and emissions targets.
Landfill Gas Conditioning and Recovery
Landfill gas flow and composition can change throughout the day or across wellfields. GraniteFuel’s Blending System automatically equalizes these variations, providing a steady feed to conditioning systems and preventing stress on compressors or membranes.
Each blending system is configured to match site conditions, source gas characteristics, and control requirements, ensuring reliable, site-specific performance.
Integration with Other GraniteFuel Systems
The Blending System is typically installed upstream of the Dehydration and H₂S Removal Systems. It ensures a uniform, well-balanced gas feed to the Process Gas Compression and Gas Separation Systems. The control architecture integrates with GraniteFuel’s platform to share real-time data across all modules, maintaining coordinated operation and process optimization.
Common Blending Questions and Answers
Gas blending ensures that variations in methane content, contaminants, or flow from multiple sources do not impact upgrading performance. Stable gas composition improves efficiency, safety, and methane recovery across the system.
Yes. The system can be configured to blend biogas with natural gas or other supplemental sources as required for process balancing, startup, or performance stabilization.
Minimal supervision is required. The system automatically monitors gas parameters and adjusts blend ratios in real time. Operators can view or adjust setpoints through GraniteFuel’s unified control interface.
Contact GraniteFuel Engineering to learn how our Blending System can improve gas consistency, optimize upgrading performance, and enhance overall process reliability.