Abstract: A sludge treatment plant includes an extended floor with a work surface for receiving a mass of spread-out sludge and a movable carriage positioned transversely above the work surface. The movable carriage includes a displacement tool designed to carry the sludge towards a terminal part of the work surface. A withdrawal tool transfers the sludge towards an outlet channel. The outlet channel includes a screw conveyor associated with a rotational drive system and equipped with a heating element. A controller adjusts the temperature in this screw conveyor to a predetermined value between 90° C. and 100° C., while adjusting the rotational drive of the screw conveyor in order to obtain a residence time of the sludge within this screw conveyor to a predetermined value of greater than 4 hours.

Abstract: In a sludge treatment installation, a movable carriage is arranged transversely above a work surface of a floor. The movement of the carriage by longitudinal translation over the floor is initiated by a first drive shaft carrying a toothed wheel meshing with a drive chain. A second chain helps to guide the carriage. On the carriage is provided a rotary turning tool which engages in the sludge. Driven in rotation by a second drive shaft independent of the first, it includes pairs of semi-cylindrical paddles fixed substantially symmetrically by one of their edges on either side of a shaft driven by the second drive shaft. The two paddles in each pair of paddles are asymmetrical as a result of having different radii, with a difference at least equal to about 5%. Forced ventilation acts directly on the paddles.

Abstract: A sludge treatment plant includes an extended floor with a work surface for receiving a mass of spread-out sludge and a movable carriage positioned transversely above the work surface. The movable carriage includes a displacement tool designed to carry the sludge towards a terminal part of the work surface. A withdrawal tool is provided in order to transfer the sludge towards an outlet channel. The outlet channel includes a screw conveyor associated with a rotational drive system and equipped with a heating element. A controller is fitted in order to adjust the temperature in this screw conveyor substantially to a predetermined value between 90° C. and 100° C., while adjusting the rotational drive of the screw conveyor in order to obtain a residence time of the sludge within this screw conveyor substantially to a predetermined value of greater than 4 hours.

Abstract: In a sludge treatment installation, a movable carriage is arranged transversely above a work surface of a floor. The movement of the carriage by longitudinal translation over the floor is initiated by a first drive shaft carrying a toothed wheel meshing with a drive chain. A second chain helps to guide the carriage. On the carriage is provided a rotary turning tool which engages in the sludge. Driven in rotation by a second drive shaft independent of the first, it includes pairs of semi-cylindrical paddles fixed substantially symmetrically by one of their edges on either side of a shaft driven by the second drive shaft. The two paddles in each pair of paddles are asymmetrical as a result of having different radii, with a difference at least equal to about 5%. Forced ventilation acts directly on the paddles.