Iowa’s Second Renewable Natural Gas Plant Operational with Bartlett & West and DMT
Sioux City, IA – Iowa’s second renewable natural gas (RNG) plant at Sioux City’s Wastewater Treatment Plant is operational thanks to Bartlett & West, a community-driven and nationally-ranked engineering firm, and DMT Clear Gas Solutions, a leading technology supplier for biogas conditioning and upgrading systems.
Renewable Natural Gas Project Scope
The water resource reclamation facility converts 800 standard cubic feet per minute (SCFM) of biogas to produce more than 99.5% pure renewable natural gas for direct injection into the natural gas pipeline. In doing so, this project generates enough renewable energy equivalent to removing 2,900 vehicles from U.S. roadways for one year or replacing 1.5 million gallons of gasoline annually.
“DMT is thrilled with the plant’s completion. We would like to thank our hardworking team and partners like Bartlett & West for a successful collaboration. Many wastewater treatment plants already have on-site anaerobic digesters to treat sewage sludge but do not have the equipment to use the biogas they produce and flare the gas instead. Our proven technology can turn these potential facilities into a net energy producer rather than a consumer.”Robert Lems, General Manager of DMT.
Project Collaboration and Technology Solutions
Sioux City selected Bartlett & West as the wastewater treatment program manager. This entailed leading teams of consultants and individuals to design several improvement projects for the City. Furthermore, Bartlett & West recommended improvements to the City’s existing anaerobic digestion system using DMT systems. This included the
- Sulfurex®CR, a chemical desulfurization unit, to remove hydrogen sulfide (H2S), and
- three-stage Carborex®MS, a membrane separation technology, to extract carbon dioxide (CO2) from the methane (CH4) stream.
“Bartlett & West offers solutions that address concerns around funding, operations and maintenance, staffing, and budget over-runs. By partnering with experienced technology suppliers such as DMT, we help water resource recovery facilities like Sioux City conceptualize projects that contribute to their energy management goals while meeting compliance and performance targets.”Randy Kenyon, Senior Project Manager of Bartlett & West
About the Project and Renewable Natural Gas
The Sioux City Wastewater Treatment Plant treats approximately 15 million gallons of wastewater per day. The facility also serves more than 30 industries and five communities from three states including Iowa, Nebraska, and South Dakota.
This $11 million renewable energy project is a significant upgrade to the existing wastewater treatment plant. It offers significant advantages such as greenhouse gas emission reduction, odor control, and revenue for Sioux City. Additionally, this project will generate $4-7 million in city income after five years, making it a great return on investment for the people and state of Iowa.
“This project positions Sioux City as a leader in the Midwest region. As the second wastewater facility in the state of Iowa to produce renewable natural gas, we are currently taking biogas that was once wasted and now repurposing it for vehicle fuel consumption. We are proud to reduce our carbon footprint working with companies like Bartlett& West and DMT Clear Gas Solutions to make it happen.”Mark Simms, Utilities Director for Sioux City
Wastewater treatment plants are attractive candidates for renewable natural gas projects. This is because they typically generate biogas with high CH4 and extremely low N2 and O2 content. Additional benefits of renewable natural gas also include
- – Increased domestic energy security,
- – Improved waste management, and
- – More jobs in rural areas.
Author: Missy Lee