Low-Cost Polyethylene Tube Digesters in Bolivia

Brief description of the technology

Low-cost household bio digesters at the present moment have a cost between 93,- € and 148,- €. To operate a digester, the producer has to charge it day to day with 20 kg of cow dung (or other animal dung), mixed with 60 liters of water. Once the bio digester starts its operation (between 30 to 60 days), produces daily around 4 and 5 hours of biogas, for cooking or other applications like use of gas lamps. Furthermore the digester provides daily 80 liters of ecologic fertilizer which helps to increase the production of agriculture. The digester system has a pressure between 8 and 20 cm of water column.