Patent ID: 8236554
Filing Date: 2012-08-07
Classification: C12M,Y02E

Abstract:
1. A biogas plant for separately methanizing two types of biomass each having a high solids fraction, said biogas plant comprising: a digestion tank system having a plurality of digestion tanks adapted to be closed in a gas- and liquid-tight manner, each of which includes a charging and withdrawing opening for charging with biomass and withdrawing the biomass; a biogas discharge means; a percolate reservoir; a percolate drainage means for discharging percolate from the plurality of digestion tanks and supplying the percolate to the percolate reservoir; a percolate distributing means for distributing the percolate from the percolate reservoir over the biomass in the plurality of digestion tanks; and a percolate regulating means for regulating the percolate level in the plurality of digestion tanks; wherein the percolate reservoir includes a first and a second percolate container; wherein supplying and discharging of the percolate to and from the first and/or the second percolate container takes place with the aid of the percolate regulating means; wherein the plurality of digestion tanks is divided into a first subset of digestion tanks having a first type of biomass, the first subset of digestion tanks connected to the first percolate container, and a second subset of digestion tanks having a second type of biomass, the second subset of digestion tanks connected to the second percolate container; and wherein the percolate from the first percolate container is discharged to the first subset of digestion tanks and the first type of biomass, and the percolate from the second percolate container is discharged to the second subset of digestion tanks and the second type of biomass.