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Reduce, reuse, refuel: A public-private partnership converts two cities’ biogas into transportation fuel

Pipes and tank at South Platte Renew Project

In October 2019, South Platte Renew commissioned its new gas recovery facility, the first system in Colorado to convert raw biogas to high-standard renewable natural gas and inject that product into a natural gas pipeline for downstream use as transportation fuel. Constructed as part of the pipeline injection project, this facility is expected not only to improve environmental sustainability and local air quality but also to generate valuable revenue streams for the utility, which is jointly owned by the cities of Littleton and Englewood.

In 2016, SPR hired Carollo to evaluate sustainable and cost-effective options to beneficially reuse the WRRF’s biogas, which was one of the focus areas of SPR’s 2014 Energy Improvement Program. Carollo recommended that SPR install a biogas-upgrading system that treats biogas and injects RNG directly into a nearby natural gas pipeline owned and operated by the Public Service Company of Colorado, a subsidiary of Xcel Energy. Carollo designed the upgrading system, which removes carbon dioxide, hydrogen sulfide, siloxanes, moisture, and volatile organic compounds from raw biogas.

Learn more in this Water Environment & Technology Article.