PROCESS FOR HYDROLYSIS OF EXCESS SLUDGE FROM A BIOLOGICAL TREATMENT STAGE

摘要

A process for the treatment of effluent comprising at least one biological treatment step resulting in the production of a biological sludge, in which at least one part of the sludge is hydrolyzed at least partially by contact with carbon dioxide and under a pressure of at least atmospheric pressure. Carbon dioxide is used for the hydrolysis of a biological sludge.