FILTRATION SYSTEM

摘要

A filtration system (400) includes a vessel (412,414,416) for housing at least '.two filtration elements (412a, 412b, 414a, 414b, 416a, 416b). One or more of the filtration elements (412b, 414b, 416b) is a reverse osmosis membrane or a nanof iltration membrane and one of the other filtration elements (412a, 414a,.416a) is a microf iltration.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 microf iltration or ultrationf iltration membranes from another vessel in the arrangement.