Jump to main content or area navigation.

Digester Byproducts

Digester effluent can be separated into liquids and solids that add economic value to a project.

Photo of a crop irrigation system.

Photo: AgSTAR

The liquid effluent from a digester can be used as a fertilizer, reducing the purchase of commercial fertilizers.


Photo of a screw press separator.

Photo: AgSTAR

Photo of separated solids conveyed from screw press separator.

Photo: AgSTAR


Photo of cows on separated solids bedding.

Photo: GHD, Inc.

Photo of packaged potting mix from digested solids.

Photo: Clear Horizons, LLC.

Photo of potting mix created from digested solids.

Photo: Clear Horizons, LLC



Digested solids can be removed from the digester effluent by means of a solids separator. The separated solids are commonly used as livestock bedding. It can also be sold for use in landscape products, such as soil amendments or biodegradable planting pots.


Photo of planting pots made from digested solids.

Photo: Freund Farm

Emerging applications for effluent solids include their use in structural building materials, such as deck boards and particle board.


Return to AD 101 »

Top of page


Jump to main content.