Guild Associates' background in gas processing dates back to 2001, when Guild Associates was chosen by Englehard (now BASF) to commercialize the Molecular GateTM technology.  Guild has biogas plants in operation at landfills, wastewater treatment plants, lagoon digesters, and other facilities where the biogas is purified to either pipeline or LNG specifications. Our portfolio of equipment includes:

  • Feed Compression
  • Pressure Swing Adsorption (PSA)
  • Temperature Swing Adsorption (TSA)
  • Membranes
  • Vacuum Compression
  • Product Compression
  • Thermal Oxidizers and Flares

Interactive Worldwide Locations Map

Below is a map highlighting our locations worldwide. Pan in or out of the map using common Google Maps controls to discover locations using Guild Associates equipment. The carousel below the map also shows the locations and a brief summary of the specifics of the location. Where our customer has agreed, photos and/or contact information is supplied. At these locations, you are welcome to contact these individuals directly concerning Guild Associates' equipment performance.

We have standard system offerings or can custom build a package to meet individual customer needs. Guild Associates' longest running plant has been in operation since 2004. Tours of operating commercial units can be arranged upon request.  Below lists the summary of our capabilities in Gas Processing:

  • Biogas plant locations in USA, Canada, United Kingdom, Brazil and Philippines
  • Feed Flows: 75 to 8,000 SCFM
  • Contaminants removed
    • Bulk rejection of CO2 and N2
    • Rejection of trace components including:
      • H2S, H2O, O2, VOCs, siloxanes, heavy hydrocarbons (C6+), and Ammonia (NH3)
      • Carcinogenic and Non-Carcinogenic Constituents identified in "Biomethane Quality Specifications" of Southern California Gas Company Rule No. 30
      • Health Protective Consituents - Carcinogenic and Non-Carcinogenic listed in Table 1 of Pacific Gas and Electric Company Gas Rule No. 21
  • Product Compression
    • Pressure up to 1,400 PSIG for high-pressure interstate pipeline
    • CNG up to 4,500 PSIG with both slow fill and direct fill

Guild Associates has a solution for you. Contact us to learn more.

MG143 biogas digester pur banner

Biogas and Digester Gas Upgrading

Biogas from digesters (waste water treatment plants and other digesters) typically have a methane (CH4) content of about 50-60% with the remaining gas being mostly carbon dioxide (CO2) and saturated moisture. Hydrogen sulfide (H2S), Volatile Organic Chemicals (VOC) and siloxanes …

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N2 Rejection with Equilibrium PSA

Guild Associates offers a new Equilibrium PSA, utilizing activated carbon adsorbent.  For landfill applications utilizing any CO2 removal technology, the Guild Associates Equilibrium PSA can be placed downstream of the CO2 removal equipment and offers many advantages for the landfill …

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Molecular Gate Adsorbent Technology

What is Molecular Gate™? Pressure Swing Adsorption processes have been commercialized for over 60 years.  So what makes Molecular Gate unique for PSA processes?  The key is the patented Molecular Gate adsorbent.  Originally developed by Engelhard (now a part of BASF), Guild Associates …

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Landfill Gas Upgrading

Landfill Gas Upgrading

Technology to satisfy California Rule 21 and Rule 30 for RNG pipleine injection While digesters normally require only carbon dioxide (CO2) removal from the product gas, landfills generally have issues with both CO2and nitrogen (N2) in the feed gas.  Guild …

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Molecular Gate Adsorbent Technology

LNG Pretreatment

LNG Pretreatment for Liquifiers The Molecular Gate™ adsorption process uses Pressure Swing Adsorption (PSA) to remove carbon dioxide from natural gas to 50 ppm or less and bulk removal of nitrogen using specially developed adsorbents with high selectivity between methane …

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