Operational temperature of the prototype plant is low
compared to typical values used to design biogas systems in
tropical regions. As a result, longer digestion time and lower
processing rate are necessary, which in turn influence
equipment specifications such as digester volume required.
The plant includes some powered components to assist in
hard manual labour operation-related tasks (e.g. digesters
loading and stirring) at the expense of increasing investment
and operational costs and probably affecting plant’s potential
market especially in low-income countries.