Edmonds approves contract for gasifier operations at sewage plant

EVERETT — After three years of trial and error, the city of Edmonds may begin consistently operating the gasification system at its wastewater treatment plant this month.

On Tuesday, the Edmonds City Council approved a $415,000 contract with Jacobs Engineering, an engineering consultant, to assist the city with operating the technology. The city’s wastewater utility fund will fund the contract.

The project has been in the works since 2018, when the city was considering greener options to replace the sewage plant’s incinerator, according to Tuesday’s council agenda memo. The state enterprise services department contracted with Ameresco, an energy solutions provider, to develop a proposal for the project. The technology, provided by Ecoremedy, uses gasification to turn human waste into dried solids.

A 2025 Hazen study found the technology destroys Per- and polyfluoroalkyl substances, or PFAS, in biosolids. Known as “forever chemicals” because they take centuries to break down, PFAS can cause serious health effects, including certain cancers, liver damage, and reproductive and developmental issues. Edmonds was the first city in the country to implement the new technology.

https://www.heraldnet.com/2026/04/09/edmonds-approves-contract-for-gasifier-operations-at-sewage-plant/