FERMENTATION DEVICE COMPRISING A COUPLED SUBSTRATE AND SEDIMENT TRANSPORT MECHANISM AND METHOD FOR OPERATING THE FERMENTATION DEVICE

摘要

The invention relates to a fermentation device for the biological degradation of a substrate containing organic material and for the recovery of the biogas that is produced in the degradation process. To circulate the substrate in the fermentation device and simultaneously remove deposited sediment, mixing units with transversal shafts (11) are arranged one behind the other in the fermentation device, the distance between their axes being smaller than the mixing unit diameter. This permits the mixing impellers (7) of the mixing units to pass through an overlap region (13) as the mixing unit shafts (11) rotate. Any sediment that has been deposited on the floor of the fermentation device can thus be transported from the front end to the removal end of said device.