Four Colorado clean-water plants are implementing projects to recover and reuse biogas from anaerobic digestion.
Most wastewater treatment facilities use some biogas (a mixture of mainly methane and carbon dioxide) to fuel boilers that heat the anaerobic digester, and most of the biogas is flared. Instead of flaring the excess gas, the Colorado facilities are recovering, treating and using the biogas as alternative transportation fuel — as fuel for the cities’ fleet vehicles or through pipeline sales to other organizations.
The facilities are owned by Grand Junction, Longmont, Littleton/Englewood (now called the South Platte Water Renewal Partners), and Boulder. All four
