Production of methane biogas from a biomass, by computer-controlled wet fermentation, has a primary reactor to set an initial pH level and a main reactor at a different pH level to produce the gas

摘要

To produce a biogas, by wet fermentation of a biomass in a gas production assembly (1), a primary fermenting reactor (6) takes the mass from a mixer (2) together with a nutrient solution, to dwell until it has a pH value of 4.3-4.8 and this level is maintained by further feeds of biomass and nutrient. The mass is transferred to a main reactor (5), where there is a constant pH value of 6.7-7.7 at a temperature of 32-40[deg]C. To produce a biogas, by wet fermentation of a biomass in a gas production assembly (1), a primary fermenting reactor (6) takes the mass from a mixer (2) together with a nutrient solution, to dwell until it has a pH value of 4.3-4.8 and this level is maintained by further feeds of biomass and nutrient. The mass is transferred to a main reactor (5), where there is a constant pH value of 6.7-7.7 at a temperature of 32-40degreesC. Digested matter is returned to the primary reactor as a nutrient. The heating is provided by the nutrient in a circuit through a pump (3) and heat exchanger (4). The developed biogas from the main reactor can be passed through a condensation separator (7) for use as energy. The reactors are mobile to be charged and emptied.