Patent ID: 6942801

Claim:
An apparatus for aerobic digestion of an organic sludge containing a biosludge, comprising an aerobic digestion tank for performing an aerobic biological digestion of the organic sludge introduced thereinto by an oxygen-containing gas supplied thereto, a circulation line provided with a pump for drawing out the sludge in the aerobic digestion tank and pumping it into the aerobic digestion tank, a liquid/gas ejector for aspirating the oxygen-containing gas and mixing it with a circulated sludge delivered via the circulation line to form a gas/liquid mixed flow, an oxygen-containing gas supply line for supplying the oxygen-containing gas to the liquid/gas ejector, a means for humidifying the oxygen-containing gas and a downward directing pipe extending towards the bottom of the aerobic digestion tank, for passing downwards therethrough the gas/liquid mixed flow formed by the liquid/gas ejector.