Abstract: A filtration apparatus for separating filtrate and concentrate from a liquid solution is disclosed. The filtration apparatus contains a housing having a discharge opening therein and being capable of containing a liquid solution to be filtered therein. A filter unit is insertable within the housing such that a first side faces the discharge opening of the housing. The filter unit contains a semipermeable membrane located thereon and capable of separating filtrate and concentrate. At least one inlet is located within the first side so that the semipermeable membrane covers the inlets.

Abstract: A hollow fiber ultrafiltration filter cartridge is modified to include a central perforated exit tube which receives filtered fluid passing through the fiber walls to optionally exit from the tube at the same end thereof which receives feed fluid passing into the hollow fibers in the cartridge.

Abstract: A pair of membrane ultrafiltration cells are mounted one on each of the front and back surfaces of a central bidirectional manifold having an exit and an entrance conduit connector on the same side wall of the manifold. The manifold takes fluid to be filtered from a source through a conduit connector for full flow delivery to each filter cell and collects filtered fluid from each cell to be dispensed through a further connector. Plural manifolds may be connected to each other in a filter system for greatly increased filtering capacity.