There is a current effort in Washington State to convert dairy farms to modular, extendable and environmentally friendly bio-refineries. The central process anchoring the bio-refinery concept is anaerobic digestion (AD). Using AD to treat a combined stream of off-dairy organics and manure can reduce the cost of organic waste treatment and enhance the production of methane rich biogas for utilization as an energy source. Capturing common nutrients such as nitrogen and phosphorus from the digester discharge also reduces the potential for downstream environmental contamination. Fiber separated from the digester can be reused on the farm or combined with off-dairy woody biomass to produce heat and biochar. The goal of this seminar is to introduce the current bio-refinery concept and then highlight the possible integration with future organic waste treatment technologies.
Presented by: Tim Ewing, Engineering Faculty