CSBE-SCGAB
Wednesday, 03 October 2012 06:49

Saskatchewan Regional News - Events and Technical note on an anaerobic digester

 

The University of Saskatchewan’s College of Engineering Centennial Reunion will be held Sept 20 to 23, 2012 in Saskatoon. Visit http://www.engr.usask.ca/100Years/ for more information on the planned events and festivities.

The CSBE Annual Meeting and Conference will be held on the campus of the University of Saskatchewan July 7-10, 2013. Stay tuned for details on the theme, workshops, tours and call for abstracts.

Technical Note

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 Lanigan, Saskatchewan. Funding assistance was provided by Western Economic Diversification, Saskatchewan’s Ministry of Agriculture and Natural Resources Canada. The facility is the only solid state digester in Canada and one of two in North America. The goal of the facility is to conduct pilot scale trials to optimize digestion operating parameters and to evaluate the energy balance and economic potential of the technology.

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 38°C.

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 University of Saskatchewan on a bench scale solid state digester to conduct replicated trials to validate the results from the pilot facility. For more information on PAMI’s solid state digestion facility, go to http://pami.ca/bioenergy/second-generation/ or email Joy Agnew (This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.).

ss-biodigester

Read 3845 times Last modified on Wednesday, 03 October 2012 06:53
Joy Agnew

Saskatchewan Regional Director

Email This email address is being protected from spambots. You need JavaScript enabled to view it.

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