Renewable Natural Gas (RNG) from Dairy Manure in Fair Oaks, Indiana

Jasper County Cow Power


600 tons of daily cow manure is collected from three farms and transported to anaerobic digesters for biogas capture. Through DMT’s fully integrated system, hydrogen sulfide (H₂S) and carbon dioxide (CO₂) is removed from the biogas stream to create renewable natural gas (RNG), which is injected into the natural gas pipeline and subsequently sold as transportation fuel.

  • < 75 ppm for H₂S removal with the Sulfurex®BR
  • < .85 caustic consumption average (kg NaOH/kg S)
  • < 2% of CO₂ in the product gas

Project Details

Year: 2018
Location: Fair Oaks, IN / USA
Product: Sulfurex®BR & Carborex®MS
Biogas Inlet: 1500 SCFM
H₂S Concentration: 4000 to < 75 ppm
Biogas Source: Dairy Manure
Application: Pipeline Injection

H₂S is removed from the biogas stream upfront by the Sulfurex® BR before CO₂ is removed by the Carborex® MS.

About the Project

The dairy RNG facility in Fair Oaks, Indiana became the first system in the U.S. to use DMT’s fully integrated system: the Sulfurex® BR for H₂S removal and the Carborex® MS for CO₂ removal.

600 tons of daily manure, generated from 16,000 milking cows, is collected by three farms, transported to one centralized site, and converted into RNG equivalent to the annual CO₂ emissions from 2.7 million gallons of gasoline. The RNG is compressed and injected into the NIPSCO natural gas pipeline which is subsequently sold as transportation fuel.

“We are proud to be recognized for our contributions in improving air quality, sustainability and farm profitability. Jasper is now the country’s largest dairy RNG project, but there is still tremendous opportunity out there to convert dairy waste into 100 percent renewable transportation fuel. We look forward to working on more innovative projects with DMT.”

Grant Zimmerman, CEO, AMP Americas

Project Results

In December 2018, the first of its kind RNG facility in the U.S. became operational.

The RNG plant was designed to handle H₂S concentrations of up to 3,000 ppm, but in operation, the biogas inlet had concentrations as high as 4,500 ppm. Through modifications, the Sulfurex®BR has proven robust in its design and is able to remove H₂S to less than 75 ppm.

“The H₂S system has been meeting all of my requirements with no issues. It’s removing the H₂S with ease and doing a great job. Doesn’t matter if I’m bringing in nameplate or just above nameplate. It’s easily capable of processing out to under 75 ppm of H₂S.”

Jason Bond, Director of RNG Service Delivery, AMP Americas

Project Recognition

In 2018, this RNG facility was the largest dairy-biogas-to-transportation-fuel project in the nation and won the American Biogas Council’s “Innovation of the Year” award for effectively combining biogas upgrading technologies.

“Our awards this year recognize projects that are great examples for future projects— a great new tool for finding nutrient recovery technologies and a champion for the biogas industry. We are so proud to be awarding these shining stars of the industry.”

Patrick Serfass, Executive Director, American Biogas Council

Large in scope, this award-winning RNG project is a model for sustainable dairy farming across North America by repurposing waste, protecting the health of the land through nutrient management, and generating substantial financial returns for all farm partners.

This RNG facility uses the Sulfurex®BR & Carborex®MS.

For key biogas contaminants, DMT offers one or a combination of technologies. The technology selection is based on an analysis of your biogas composition, inlet gas flow, pollution load and RNG application. Based on your CAPEX, OPEX and/or TCO needs, we provide our customers with an innovative, economical solution.