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* Investment costs vary greatly depending on the overall plant concept. Costs for biogas production increase with decreasing climatic temperatures. Life expectancy ranges from about 20 - 25 years.
* Investment domestic biogas plant in Nepal, (fixed dome types from 4-20m320m³) US$ 300 400. * Maintenance costs (8m3 8m³ digester) US$ 5.50 US$ 8.50 per year.
* Operational costs - Negligible.
