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For municipal sludge with low solids content it may be necessary to thicken the sludge on a belt thickener or drum thickener before dewatering on a belt press. Some types of belt presses have a sufficiently long gravity dewatering zone and therefore do not need to thicken the sludge before the belt press.

Filter belt FiltraPress SW-Apple was specifically designed for production of apple juice, fruit juice and vegetable juice. This belt has best mechanical and filtration properties and can withstand the extreme tension, which is typical for this application, for example on Flottweg belt presses.