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.”

quote person

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.”

quote person

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.”

quote person

Gov Graney

Managing Member, Nacelle Solutions

Join our newsletter

Stay up to date with our newsletter!

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.

  • Sept 29-30, 2021

    RNG Works

  • Nov 9-10, 2021

    Value of Biogas, West

  • Dec 13-16, 2021

    RNG Conference

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 'clear and prosperous future'.

Robert Lems, General Manager

Robert Lems, General Manager

Robert Lems, M.Sc., is a technical expert with more than 15 years of experience in biogas upgrading. As DMT’s former R&D Manager, Lems has pioneered majority of the products currently in the market. In 2015, Lems established DMT’s U.S. branch and has since oversaw more than 20 RNG projects in North America.

About us Contact us