MEMBRANE SYSTEM FOR PRESSURE RETARDED OSMOSIS (PRO)

摘要

The present invention relates to semi-permeable membranes and in particular to a semi-permeable membrane sheet, modules and cassettes. A particular use is in pressure retarded osmosis (PRO) driven power plants. Various aspect of the invention relates to different structures, comprising semi-permeable membrane sheets, typically being made from a foil of an impermeable material comprising a first opening, a second opening and a membrane opening. The membrane opening being covered by a semi-permeable membrane attached to the foil along the rim of the membrane opening.