Disintegration of Anaerobically digested sewage sludge

摘要

A method and an apparatus for treatment of aqueous organic waste, especially sewage sludge, comprising the stages of thickening (4) the waste, anaerobically digesting (5) the thickened waste and disintegrating (6) the digested residue by cell wall destruction is shown, whereas at least part of the disintegrated matters (12) are fed back to the thickening stage (4). By feeding back the disintegrated matters to the thickening stage the liquid of the disintegrated matters is drawn off and the solids are subjected to anaerobic digestion. Thus the volume of the sludge is reduced.