The CSBE Annual Meeting and Conference will be held on the campus of the
The Prairie Agricultural Machinery Institute’s Applied Bioenergy Centre (ABC) designed and commissioned a pilot scale solid state anaerobic digester located at the Western Beef Development Centre Termuende Ranch near
The facility includes two batch reactors, each with a capacity for 10 tonnes of solid substrate. The system includes a leachate recirculation system (for inoculation and “mixing”) and a gas collection, metering and analysis instrumentation. Heated glycol piping inside the vessel maintains the temperature at
The scale of the pilot facility also allows assessment of the unique material handling requirements for solid state digestion. Unlike liquid digestion, the substrate cannot be pumped, metered or mixed mechanically. At 20% to 50% total solids content, solid state digesters have a small footprint and do not require water or generate wastewater. The technology allows solid organic waste to be digested in its natural form. The system can also handle heterogenous, “dirty” material that would cause sedimentation and clogging issues in a traditional liquid digester.
Digestion trials in 2012 utilized solid beef feedlot manure mixed with straw and trials planned for 2013 and 2014 will generate information on the digestion of feedlot manure, wet distiller’s grains, cull potatoes and deadstock. The ABC also collaborates with the