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Deodorizing pig manure with a slurry bioreactor!

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Media Relations
Agriculture and Agri-Food Canada

Sherbrooke (Quebec) is the birthplace of a method of producing electricity from pig slurry, an innovation that has also given rise to a local business. Agriculture and Agri-Food Canada’s Dairy and Swine Research and Development Centre, in partnership with Sherbrooke company Bio-Terre Systems Inc., has developed a technology that eliminates the stench from liquid pig manure.

While rural residents will consider this achievement a major boon, the research team’s initial objective was to find a way to reduce and use methane emissions from manure pits. That objective was achieved when the research team developed a new technology, a bioreactor for the anaerobic treatment of liquid manure: bacteria work at low temperatures to digest pig excrement while allowing the release of methane, which can then be used to produce electricity. This innovation solved three problems at once: it deodorized manure, produced electrical or thermal energy, and turned the residual sludge into a high-quality fertilizer.

This innovation was developed in the 1990s and patented in the United States and Canada. Pig farmers in Quebec and elsewhere in Canada are already using the bioreactor, and this technology is also in demand internationally.

Agriculture and Agri-Food Canada is contributing to the development of an innovative, sustainable agriculture sector.

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