Forward osmosis membrane flow system and composite semipermeable membrane for forward osmosis membrane flow system

摘要

The forward osmosis membrane flow system (1) includes a high osmotic pressure fluid flow section (2) to which a high osmotic pressure fluid is supplied, a low osmotic pressure fluid flow section (3) to which a low osmotic pressure fluid with a lower osmotic pressure than that of the high osmotic pressure fluid is supplied, and a semipermeable membrane (4) that separates the high osmotic pressure fluid flow section and the low osmotic pressure fluid flow section from each other. A flow rate in the high osmotic pressure fluid flow section (2) is increased by an occurrence of fluid migration from the low osmotic pressure fluid flow section (3) into the high osmotic pressure fluid flow section (2) through the semipermeable membrane (4). The semipermeable membrane (4) is a composite semipermeable membrane with a polyamide-based skin layer formed on a porous epoxy resin membrane.