| 摘要 |
The invention relates to a method for biogas production by co-digestion of waste activated sludge and lignocellulosic biomass. In order to increase biogas yield, activated sludge is mixed with lignocellulosic biomass which has been pre-treated at 120-250°C and a pH of 0.5-3.0, such that a mixture having a temperature of 75-99°C and a pH of 0.5-3.0 is obtained, and the mixture is incubated before being anaerobically digested. The invention also relates to a system for performing the method, wherein a unit (1) for pre-treatment of lignocellulosic biomass comprises a pressure reactor (27) and a flashing chamber (28), and wherein a steam outlet (31) of the flashing chamber is connected to a steam inlet (32) of a mixer (9) for mixing sludge and pre-treated biomass. |
