Dewatered sewage sludge is conveyed into the push floor container of the dryer directly through the dewatering screw, using a wheel loader, worm, or conveyor belt. Controlled by the process controller and monitored by sensors, the push floor doses this into a front facing screw feeder. The worm conveys the sewage sludge into a mixing trough, which leads to the dryer.
The dried sewage sludge is conveyed in the mixing screw from the dryer return line. Dry and wet are then mixed homogeneously to approximately 45% dry matter and conveyed into the first drying chamber.
The correct mixing ratio, which doses wet and dried sewage sludge as part of the program control system, guarantees a perfect cloud of material in the drying chamber and the maximum possible material surface.