The invention relates to an apparatus for continuous separation of dry matter from a fluid, comprising an enclosed environment capable of being under vacuum or under positive pressure, in which enclosed environment a number of rollers (1, 3, 4, 4′, 6, 6′, 20, 21, 22, 23) form a chamber which is divided into two or more compartments (12, 13, 24, 27, 25, 26) by filtration means (7, 8, 16, 29, 36, 37, 38, 40), wherein one or more filtrated chambers (9, 10) are placed on the pure side of the filter means. In order to allow for cleaning and/or maintenance of the filtrate chambers, additional filtrate chambers are provided, which are separated from the first filtrate chambers by a wall. One of the filtrate chambers at any time is placed under the filter, while the other filtrate chambers are situated outside the enclosure for maintenance/cleaning.