Lenz Composting

Stanwood, Washington

Turning Trash to Treasure in the Pacific Northwest
The Lenz Composting project is situated on 150+ acres in Stanwood, Snohomish County, Washington. The project provides compost services to residents and farmers in the region and the local air authority points to Lenz Compost as an exemplary facility in the region.

The context
Landfilling of food waste and food-soiled paper results in the anaerobic decomposition of the waste, releasing methane, a potent greenhouse gas. Composting is the natural process of recycling this food waste into a valuable fertilizer that can enrich soil and plants. Composting speeds up the organic decomposition process by providing an ideal environment for bacteria, fungi, and other decomposing organisms to do their work. The resulting matter, which often ends up looking like fertile garden soil, is called compost and it is rich in nutrients and can be used for gardening, horticulture, and agriculture.

The project
Lenz Composting receives food waste (feedstocks) at their site, where it is deposited in a covered receiving building. The feedstocks are mixed with bulking agents, if needed, and mixed in a slow-speed shredder. The mixed materials are then processed through a picking station where contaminants are removed manually. The material is then moved directly to the Aerated Static Pile composting process.

The benefits
The project avoids the release of dangerous methane gas into the atmosphere while producing high-quality organic compost with a number of positive environmental attributes. The compost’s organic matter and nutrients improve the water retention capacity of the soil, allowing for the conservation of water resources and improved plant growth and vigor.

Interested in this project and want to get involved?

Project Type:

Renewable Energy


Organic Waste Composting


Climate Action Reserve
PROJECT sustainability GOALS

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