Biosolids Beneficial Use Program
Committed to Responsible and Economical Use of Our Natural Resources
Before the Biosolids Beneficial Use Program was introduced at the Laguna Treatment Plant in 1985, all the solids that passed through the plant went to the Sonoma County landfill. By 1997, only a third of the biosolids material was sent to landfill. The remaining two-thirds were used in land application, as fertilizer or produced into organically-based compost*. Over the past 11 years, with stepped up land application and composting programs, an average of only four percent of the biosolids generated at Santa Rosa's Regional Water Reuse Plant reach the landfill, where it is used as alternative daily cover.
Biosolids Beneficial Use Options
LystekIn 2016 the City of Santa Rosa started working with Lystek International, Inc. to process some of the biosolids produced at Santa Rosa’s Water Reuse Plant. Biosolids are sent to the Lystek Organic Material Recovery Center at the Fairfield Suisun Sewer District.
A byproduct of treating and processing biosolids is methane gas. At the City's Laguna Treatment Plant, this gas is used to generate about thirty percent of the Plant's energy needs.