Report I-673 - R.P. Hocking, G.E. Timbers, J. Fallis, Research Branch, Agriculture Canada. November 1984
Thes report describes the basic design and
construction features of this digester and reviews operational
procedures and problems involved in this particular farm scale
operation.
The construction of a farm scale anaerobic digester was the logical
outcome of research which suggested that the production of biogas from
livestock manure was technically, although not necessarily economically
feasible. The economic question of whether the net energy yield when
combined with the environmental benefits from the digester would
justify the construction and operating costs can only be properly
evaluated through construction and operation of a farm system. The
usefulness of digesters depends to a large part on the labour
requirements as well as the technical expertise required for operation.
The success of a digester on a North American farm could not be
predicted without practical experience at the farm level.
The digester operation at Millbrook, Ontario provided Agriculture
Canada through its contractor with "hands on" experience in the
construction, maintenance and operation of a farm sale anaerobic
digester.
Daily operation of the digester was to occupy approximately one hour
per day of the farmer-operator's time; however, major time commitments
did occur when equipment malfunctioned or when operational conditions
dictated a shutdown of the system. The major problem areas of mixing
and unloading the digester on a regular basis were not completely
solved and it was decided to refit and modify the digester.
Root / Canadian Biogas Projects
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