Hollow fiber type semipermeable membrane, hollow fiber membrane module and forward osmosis water treatment method

摘要

Provided is a hollow-fiber-type semipermeable membrane, characterized in that the inside diameter is greater than 250μm but no greater than 700 μm. Even when a high-viscosity draw solution is flowed through the hollow portions of the semipermeable membrane, the decline in the efficiency of forward osmosis treatment can be minimized.