The increased surface area boosts the filtration efficiency and results in a higher throughput. All exposed plastic surfaces are pre-sterilised and validated which makes CIP/SIP redundant. The filter bag is installed in a pressure vessel during filtration. This design opens up the possibility to compress the filter bag by applying an external pressure, resulting in very low liquid heel. The unique design allows either a once through filtration or a multi-cycle operation, where the cake can be back-flushed and accumulated on the bottom of the bag. Finally, the compressed bag, including the solid waste, is in very compact form and can be removed and safely disposed of.