Processing waste from pizza dough and potato processing,
2 x 100 m3 receiving tanks
2008 first feasibility study
2009 updated feasibility study
2010 begin construction
2011 System operating
53 m3 / day
Excess heat is utilized in the barn, truck shop,
houses and outdoor swimming pool.
progressive farmer, Jacques Laforge wanted to integrate a biogas system in
his farming operations. Being that it was the first anaerobic digester
system in the province of New Brunswick, the surrounding community colleges
took great interest in the project, and the project was further supported
with funding from public sources, for example Planning and Assessment for
Value-Added Enterprises, a program of Agri-Food Canada, as well as from the New
Brunswick Climate Action Fund.
project is sited in close proximity to the McCain potato processing facility
and takes all of their processing waste stream, an arrangement that was part
of the consideration in getting the project built.
annual effluent amounts to 13,000 MT/yr of liquid fertilizer, which is spread
on surrounding fields.
the start-up phase the system experienced a foaming issue which was due to a
polymer change in one of the off-farm feedstocks. The foaming resulted in a
drop of the pH-level, which, in turn, required the addition of lime to
increase the pH. Ultimately, the situation was remedied through an
adjustment in feedstock mix and feed-in rate, that did not result in foaming,
while keeping the same list of feedstocks.
project is uniquely set on a steep hill of underground tight shale
formations. The digester was sited in place of the existing manure lagoon, whereby
a significantly oversized effluent storage tank was built in another phase. Due
to unfamiliarity with the technologies in this application, construction
approvals were challenging, ranging from local utility approval to generator