Abstract
This paper assesses the life-cycle cost analysis of three biogas digesters. Results show that the cost of biogas depends on the construction of digesters, sizes of methane tank and possibility of heating of the slurry. The biogas and natural gas cost calculations are observed and found to be comparable. Therefore, it is recommended that the biogas digesters can be constructed and installed even by every family where the forming of long gas pipelines is not required and/or compulsory.