A liquid filtration apparatus includes a series of upright filter plates forming a filter plate pack. Filtering spaces are formed in the filter plate pack. The liquid filtration apparatus includes at least one filtering space and a filter chamber that is at least partly limited laterally by a filter media. The filtering spaces have an elongate bottom discharge opening limited by two first opposite side walls and provided with a first inflatable and deflatable hose seal extending across the elongate bottom discharge opening and configured to selectively open and close the elongate bottom discharge opening at the first inflatable and deflatable hose seal. The first inflatable and deflatable hose seal are in the elongate bottom discharge opening fastened at one of the first opposite side walls of the elongate bottom discharge opening.