Considering the average salary in Kenya [49] and assuming that
to produce 60 m3 of biogas, 2 h of labour work per day are needed
to keep the system running, the O&M of the digestion system will
be around $0.08/kWh. Assuming the engine O&M to be $0.02/kWh,
its total O&M will be $0.1/kWh. Since this price is based on a rough
assumption, a sensitivity analysis has been done to have a better
projection of the system operation.