Regarding the construction, operation and maintenance of
household biogas plants, the construction of fixed dome digesters is
labour intensive and requires skilled supervision [21]. Construction
materials are not always available in rural and remote communities,
but they are generally available in larger nearby communities.
Plastic tubular digesters are characterised by the ease of
implementation and handling. Most importantly, they do not
require specialised manpower. On the other hand, high quality
prefabricated plastic bags might not be locally available and require
importation. Nevertheless, all construction materials can be easily
transported