King County purifying biogas into RNG

In Washington, at its South Treatment Plant in Renton, King County is purifying the biogas into renewable natural gas, an alternative to fossil fuels that generates revenue for the county while reducing greenhouse gas emissions. King County — which has converted methane to natural gas for more than 30 years — is now a leading producer of clean, renewable biofuel that can be used by commercial vehicles.

Renewable natural gas sales last year yielded more than $6 million in revenue for King County’s Wastewater Treatment Division. Clean Energy, the leading provider of natural gas fuel and renewable natural gas fuel for transportation in North America, is currently delivering the renewable natural gas produced from South Plant to its Washington fueling station network.

The five stations fuel about 1.5 million gallons of renewable natural gas annually, sourced from this local production facility. One of the largest local end users is Recology, an employee-owned waste management company that uses the renewable natural gas for their garbage trucks that roam the region’s neighborhoods.