Abstract: There is described a filter device for placement in a utility sink in an aircraft for filtering particulate material, and for dissolving and/or absorbing fatty compounds from the waste fluid, which device comprises a basin (1) having one or more bottom outlets (2) and a filter element (3) located at the bottom of the basin, which basin (1) has a shape adapted to the shape of the sink. The bottom outlet (2) in the basin (1) is made up of a plurality of through-going apertures. The filter element (3) consists preferably of a porous plastic material or wire netting web coated or impregnated with an enzyme- and/or soap-containing compound.