Oct. 6—The city of Pullman announced Thursday it has returned to its traditional method of hauling biosolids. The process changed last month when the City Council ratified an emergency ...

State lawmakers nearly passed legislation that would have placed a five-year moratorium on the use of biosolids, which are ...

The plans call for nearly doubling the plant's current treatment capacity from 2.7 million gallons per day to 5 million, improving the biosolids treatment process.

“I think it also future proofs us,” CCU Director Roger Kelso said of transitioning to biosolids drying. “This process wouldn’t age out like the land application is.

For over 30 years, the city used diesel to burn biosolids into ash. The process released carbon dioxide into the air, and the resulting ash waste was trucked to landfills, interim Edmonds Public ...

In addition, a company called Synagro handles the drying of about 60% of the plant’s sewage sludge after it’s removed from the process, so that it can be used as agricultural fertilizer.

As part of the work, 12-hour vacuum canisters were set to collect samples in each of the biosolids process areas and biosolids storage loading areas, Baker said.