Abstract: In a device for filtering, washing and drying a solid material-liquid mixture, using a liquid permeable filter cloth the mixture is first subjected to a pressure difference above and below the filter cloth, whereafter liquid is supplied to the mixture. The mixture present above the filter cloth is then dried according to the invention using radiation sources, the radiation from which has differing, preferably increasing, wavelengths in the processing direction. The wavelength lies in the infrared range. The applied wavelength is chosen subject to the product for filtering.

Abstract: The present invention provides an apparatus for separating into solid material and liquid a mixture thereof. The apparatus includes a movable filtering element for filtering the mixture, a feed device for supplying the mixture onto the filtering element, a suction device for drawing off liquid from the mixture through the filtering element and a measuring device for measuring the area or areas on the filtering element where the liquid is predominantly to be found.