Filter press is a kind of intermittent positive pressure filter. Multiple filter plates are put together to form dozens or hundreds of neatly arranged filter chambers. Suspension is injected into the chambers by feeding pump, from which the continuous feeding pressure and intercepting of filter medium create a pressure difference inside and outside the chambers. This pressure difference forces the separation of solids and liquids. In hydrocolloid production process, filter press is normally used to filter the hot gel solution to remove the cooking residue and improve the gel clarity. On the other hand, filter press is more and more commonly used in the gel dehydration process with purpose of reducing gel moisture and prepare for the following drying process.