Technology Research and Extension Related to Anaerobic Digestion of Dairy Manure: 2015–17 Biennium

This report summarizes research and extension activities related to anaerobic digestion of dairy manure conducted during the 2015–2017 biennium through Washington State University’s Agricultural Research Center. The work was supported through the state’s Appendix A applied bioenergy research program, a collaboration between Washington State University and the Washington State Department of Agriculture focused on advancing practical bioenergy technologies. The report describes multiple research efforts addressing anaerobic digestion systems, energy conversion from agricultural wastes, and related technologies supporting manure management and renewable energy production. Projects included research on digester system performance, co-digestion strategies, bioenergy production pathways, and technologies for converting agricultural waste streams into useful products. The program also helped leverage additional external funding from state and federal agencies to expand research on waste-to-energy systems. Overall, the work contributes to improving the technical feasibility, environmental performance, and economic viability of anaerobic digestion systems for dairy operations in Washington state.