Abstract: A filtration system includes a vessel for housing at least two filtration elements. One or more of the filtration elements is a reverse osmosis membrane or a nanofiltration membrane and one of the other filtration elements is a microfiltration or ultrafiltration membrane. The vessel has an inlet port for providing a liquid feed to the filtration elements, an outlet port for directing a permeate produced by the elements from the vessel and an outlet port for directing a concentrate produced by the elements from the vessel. A number of vessels can be provided in a parallel arrangement and/or a series arrangement and the vessels can be arranged so as to allow regeneration of the microfiltration or ultrationfiltration membranes from another vessel in the arrangement.

Abstract: A filtration system (10) comprises an array of filtration vessels (12) mounted on support assemblies (14). each vessel (12) houses a number of primary stage filtration elements (16) in the form of microfiltration and/or ultrafiltration membranes and a plurality of secondary stage filtration elements (18) in the form of nanofiltration and/or reverse osmosis filtration membranes. The vessel (12) has an inlet port (20) for directing a fluid feed through the filtration membranes (16,18) and a central conduit (22) receives permeate produced by the filtration membranes (16, 18). A chamber (24) collects and directs concentrate from the vessel (12) via a concentrate outlet port (26). A permeate chamber (28) receives permeate from the membranes (18) and from the membranes of at least one other vessel (12) and an outlet port (30) directs permeate from the chamber (28). The permeate outlet ports (30) and the permeate chambers (28) of the vessels (12) are interconnected.

Abstract: A filtration system includes a vessel for housing at least two filtration elements. One or more of the filtration elements is a reverse osmosis membrane or a nanofiltration membrane and one of the other filtration elements is a microfiltration or ultrafiltration membrane. The vessel has an inlet port for providing a liquid feed to the filtration elements, an outlet port for directing a permeate produced by the elements from the vessel and an outlet port for directing a concentrate produced by the elements from the vessel. A number of vessels can be provided in a parallel arrangement and/or a series arrangement and the vessels can be arranged so as to allow regeneration of the microfiltration or ultrationfiltration membranes from another vessel in the arrangement.