Explains co-digestion of dairy manure with food waste and other substrates to increase biogas production and system value.
This fact sheet explains how co-digestion can increase the value and performance of dairy manure anaerobic digestion systems. Co-digestion occurs when manure is processed together with other organic materials—such as food processing waste, fats, oils, and greases—in the same digester. These high-energy substrates can significantly increase biogas production, improving the economic performance of anaerobic digestion systems on dairy farms.
The publication reviews potential co-digestion substrates, including materials that complement manure digestion as well as those that may create operational challenges. It also discusses considerations for securing reliable feedstocks, managing contamination risks, and complying with regulatory requirements. Operational factors such as infrastructure upgrades, feedstock handling, and digester performance are also addressed.
By outlining both opportunities and potential challenges, the publication helps dairy producers, advisors, and project developers evaluate whether co-digestion could improve the technical and financial viability of manure-based anaerobic digestion systems.
This publication is part of an archive and may not meet current digital accessibility standards. CSANR is working to improve digital accessibility of all materials. If you need this content in an alternative format, please contact csanr@wsu.edu.
Authors
Kennedy, N., Yorgey, G., Frear, C., and Kruger, C.
Year Published
2015
Areas of Focus
Agricultural Practices, Climate & Environment, and Value from Waste
Topics
Energy, Livestock, Production Systems, and Waste Management
