The present invention relates to an apparatus for treating sewage sludge in which the sludge is conveyed to a vessel having an oxygen-rich atmosphere. The sludge is channelled through a first dispersing means to a plurality of second dispersing means by which it is dispersed throughout the oxygen-rich...http://www.google.fr/patents/US4582612?utm_source=gb-gplus-shareBrevet US4582612 - Sewage sludge treatment apparatus
