(EP771318-A1)      Municipal waste sludge or animal slurry is delivered to a solids separator (2) where some of the solids are separated for delivery to a composter (18). The remaining sludge is delivered through an electrolytic cell (12) into a separate flock separator (4). The separated flock is delivered together with the separated solids to the composter (18).    The water remaining after flock sepn. is stored in a container (9) and delivered through a sand filter (16) and/or a carbon filter (17). The sludge or slurry from the electrolytic cell (12) to the flock separator (4) is supplemented by the addition of a polymer as flocculant. This binds the ferri-hydroxide precipitate produced in the cell into sizeable blocks. The solids separated in separator (2) and the flock from flock separator (4) are mixed and the mass delivered to the drum composter (18).    USE -   For treating municipal waste sludge or animal slurry, esp. pig farm slurry, into a solid material suitable for use as a soil conditioner or protein feed, and a pure water which can be drained directly to the environment or used as drinking water for livestock.    ADVANTAGE -   The treated waste does not damage the environment.    (EP771318-B1)      Municipal waste sludge or animal slurry is delivered to a solids separator (2) where some of the solids are separated for delivery to a composter (18). The remaining sludge is delivered through an electrolytic cell (12) into a separate flock separator (4). The separated flock is delivered together with the separated solids to the composter (18).    The water remaining after flock sepn. is stored in a container (9) and delivered through a sand filter (16) and/or a carbon filter (17). The sludge or slurry from the electrolytic cell (12) to the flock separator (4) is supplemented by the addition of a polymer as flocculant. This binds the ferri-hydroxide precipitate produced in the cell into sizeable blocks. The solids separated in separator (2) and the flock from flock separator (4) are mixed and the mass delivered to the drum composter (18).    USE -   For treating municipal waste sludge or animal slurry, esp. pig farm slurry, into a solid material suitable for use as a soil conditioner or protein feed, and a pure water which can be drained directly to the environment or used as drinking water for livestock.    ADVANTAGE -   The treated waste does not damage the environment.