Storage of livestock liquid manure in anaerobic conditions (absence of oxygen) in storage systems such as a pit or lagoon produces methane, a powerful greenhouse gas (GHG). The use of anaerobic digestion, chemical, or mechanical manure treatments can reduce methane emissions.
The Reducing Manure Methane Emissions federal offset protocol will create an incentive for farmers, livestock operation owners, and other project developers to implement projects that treat liquid manure to reduce methane emissions. These activities will generate GHG emission reductions for which federal offset credits may be issued under the Canadian Greenhouse Gas Offset Credit System Regulations.
Proposed eligible manure treatments are:
- anaerobic digestion, on-farm or at a communal facility, where the methane produced in the storage system is not released in the atmosphere. Manure is processed in a tank, and methane recovered to be used for energy generation (displacement of fossil fuel is not eligible for credit issuance)
- chemical treatment (acidification) by adding an acid solution into the manure storage system to reduce methane production
- mechanical treatment by separating manure into two outputs: a solid sludge and a liquid sludge, resulting in the liquid sludge having lower organic content and lower level of methane emission potential.
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