Turning Waste into Value

Our Services Include:

  • Biogas Project Development

  • Gas Conditioning Systems

  • Floating Digester Covers

  • Digester Covers for Gas Storage

  • Site specific sludge removal and maintenance systems

  • Tank Biogas Covers

  • Ambient Temperature and Mesophilic Lagoon Biogas Systems

  • Flaring and Cloud Based Monitoring Equipment

  • O2 injection systems for H2S removal

  • Carbon Dioxide extraction and purification from waste RNG tail gas

EFI - The leader in Anaerobic Lagoon Digesters for Biogas Production

We are the #1 installer of covered lagoon anaerobic digesters in the U.S., with over 500 operating systems. Our innovative, integrated approach captures the value in your waste stream, transforming it into a sustainable energy source for your operation.

EFI has the most comprehensive dataset of biogas feedstock materials, their biogas potential, operating conditions, and project return analyses, assembled from hundreds of biogas projects around the world. 

EFI does not produce, market or transport RNG

Our partners

  • JBS logo with blue text and green and blue curved lines on either side
  • A logo featuring a stylized sun rising above two red and blue paths, with the word "AEMETIS" beneath.
  • Sonoco logo with a blue background and white stylized design.
  • Illustration of a woman with brown hair in a red dress with white sleeves, standing behind a garden of leafy greens and vegetables, surrounded by a yellow sunburst on a red background. The text 'SUN-MAID' appears below.
  • Perdue logo with a rural landscape and a house in the background
  • Wayne Sanderson Farms logo with red rooster and slogan 'Together, We Make Chicken Amazing'

American Biogas Council Honors EFI Founder & President Dennis Shanklin with Lifetime Achievement Award

Case Study - Perdue Lewiston - Winner of the 2025 US Poultry Association Clean Water Award

Erica Chase with EFI and Neal Powell with Perdue Farms and Ashton Weller with Perdue Farms

Project Highlights:

  • EFI installed HDPE covers on two wastewater lagoons.

  • The project reduced GHG Emissions by 95%, equivalent to 120,000 tons per year (17% of Perdue’s corporate-wide emissions.)

  • Recovery and Purification of CO₂: EFI’s subsidiary CleanCycle Carbon purifies CO₂ from anaerobic digester to beverage-grade quality for beneficial industry reuse.

An aerial view of an anaerobic digester covered by EFI
An aerial view of an anaerobic digester before being covered by EFi with geosynthetic membrane and HDPE liner

We’re passionate about helping you build smarter, stronger projects from the ground up! By consulting on your specific project, regulatory requirements and long-term goals, we guide you toward the best-fit solution.

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Technical Overview: The Impact of Integrated Biogas Systems

An integrated anaerobic digester system utilizes geosynthetic covers and liners to facilitate the biological breakdown of organic matter in an oxygen-free environment. This process, known as anaerobic digestion, transforms organic waste into high-value energy outputs while mitigating environmental hazards.

Core Functional Benefits of Covered Lagoon Digesters (CLDs)

1. Renewable Energy Generation (Biogas Capture)

Advanced geomembrane cover systems create a hermetic seal over waste lagoons, allowing for the collection of raw biogas (primarily methane, (CH4), and carbon dioxide, (CO2)).

  • Energy Conversion: Captured biogas can be scrubbed and upgraded to Renewable Natural Gas (RNG) or utilized on-site for heat and power (CHP) generation.

  • Economic Value: This converts a waste-disposal liability into a revenue-generating asset through carbon credits and energy offsets.

2. Atmospheric Protection and Odor Mitigation

By sealing the lagoon surface, these systems eliminate the release of Volatile Organic Compounds (VOCs) and hydrogen sulfide (H2S).

  • Community Impact: Effective containment reduces odor profiles by over 90%, facilitating better zoning compliance and community relations.

  • Air Quality: The system prevents the localized accumulation of hazardous gases, ensuring a safer operational environment for personnel.

3. Greenhouse Gas (GHG) Abatement and Regulatory Compliance

Methane is a potent greenhouse gas with a Global Warming Potential (GWP) significantly higher than carbon dioxide.

  • Methane Destruction: By capturing and combusting methane, operators can reduce their facility’s carbon footprint by up to 95%.

  • Regulatory Alignment: These systems are engineered to meet stringent EPA AgSTAR standards and state-level environmental mandates, providing a verifiable path to "Net Zero" operations.

Why EFI Is the Partner of Choice

The success of a biogas project is contingent upon the synergy between site-specific engineering and material performance.

Custom Site Analysis and Design

Every system is engineered based on the biochemical methane potential (BMP) of the feedstock—whether dairy manure, swine waste, or food processing byproducts. Design variables include:

  • Hydraulic Retention Time (HRT): Optimizing the duration waste stays in the digester for maximum gas yield.

  • Material Compatibility: Selecting liners that withstand the chemical degradation common in high-ammonia environments.

Turnkey Installation Standards

Precision fabrication and installation by specialized crews ensure the structural integrity of the containment system. A "design-build" approach minimizes technical friction between the engineering phase and the physical deployment of geosynthetic components, ensuring that the finished system meets the exact specifications required for long-term gas pressure management.

Let’s work together.

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