DMT Clear Gas Solutions

Your Total Solutions Provider for Biogas Upgrading and Gas Desulfurization

Biogas Upgrade with DMT

DMT Clear Gas Solutions is a socially and environmentally responsible technology supplier specializing in biogas upgrading and gas desulfurization. From financing options to 24/7 service support, DMT is your local total solutions partner for renewable natural gas (RNG) projects in North America.

  • +130 worldwide references
  • +30 years of experience
  • 24/7 service support
About the products Market solutions

Renewable natural gas (RNG) technology experts

We are renewable natural gas (RNG) experts in all sectors– agriculture, livestock (e.g., dairy, swine, poultry), wastewater treatment plants (WWTP), source separated organics (SSO) and landfills. We specialize in biogas upgrading (CO₂ removal) through membrane separation and biogas pre-treatment using chemical and biological gas desulfurization techniques (H₂S removal). Our integrated solutions can be tailored to your biogas composition, inlet fluctuation and RNG off-take requirements.


“DMT’s service department is wonderful. They quickly respond to any inquiries we may send them.”

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Richard DeGarmo

Director of Renewable Energy, Hawai’i Gas

“Jasper is now the country’s largest dairy RNG project. We look forward to working on more innovative projects with DMT.”

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Grant Zimmerman

CEO, AMP Americas

“We attribute our success to partnering with key vendors like DMT that have real and proven experience in the gas upgrading and processing world.”

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Gov Graney

Managing Member, Nacelle Solutions

Total Solutions Provider

As a Total Solutions Provider, DMT handles all interconnecting interfaces of a RNG project. Our customers seeking to convert biogas into RNG deal with one company and one contract. In return, there is no hassle of dealing with multiple parties, suppliers, and contracts. DMT will handle that for you. Looking for a financier or off-taker? We have partnerships to solve that problem for you.

Biogas Industry Events

Our sales and marketing team attends biogas industry events and conferences all over North America. Got a question? Come meet the team.

  • May 13-16, 2024

    Biogas Americas

  • Sept 10-12, 2024

    RNG Works

  • Oct. 7-9 2024

    Value of Biogas, West

All events

About DMT

DMT was originally founded in 1987 by chemist, Rob Dirkse, to specialize in sustainable solutions such as groundwater purification, desulfurization and odor abatement. He was succeeded by his son, Erwin, in 2001, who refocused the company on biogas upgrading and desulfurization. In 2015, DMT opened its North America office in Portland, OR as DMT Clear Gas Solutions. Our mission is to create a sustainable world.

Theo Zuijdwijk, CEO

Theo Zuijdwijk, CEO

Theo is an entrepreneurial, highly driven executive with decades of international experience in general management, finance, IT, M&A, strategic planning and organizational restructuring. As our leader, Theo’s focus is to enhance our offering by broadening our integrated solutions as well as providing superior customer service and project execution.

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