PROBLEM TO BE SOLVED: To provide a membrane module for realizing separation into a component (a particle and a molecule) by a membrane not by grain removal in a membrane filtration method, under energy-saving.MEANS FOR SOLVING THE PROBLEM: The present invention provides a pore diffusion membrane module capable of realizing a condition where a transmembrane pressure difference is 0.05 atmospheric pressure or less and a flow of a processing object liquid on a membrane surface is set as a laminar flow of 2/sec or more in a rate of strain. The module is constituted of at least four kinds of areas, (A) a laminar flow preparation area, (B) a pore inner diffusion area in a flat membrane under a laminar flow, (C) a laminar flow maintaining area and (D) a diffusion liquid storage area, and (A) and (B) are integrated in a plane in common to the flat membrane. Nonwoven fabric or a polymer porous membrane of high surface smoothness of a thickness of 200 μm or less, is loaded as a membrane.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】 膜ろ過法での粒子除去ではなく膜による成分(粒子及び分子)への分離を省エネルギー下で実現させる膜モジュールを提供する。【解決方法】 膜間差圧を0.05気圧以下でかつ膜表面での被処理液体の流れをひずみ速度を2/秒以上の層流とした条件が実現できる孔拡散用膜モジュールを提供する。該モジュールは少なくとも4種の領域、(ア)層流準備域、(イ)層流下での平膜での孔内拡散域、(ウ)層流維持域、および(エ)拡散液貯溜域で構成され(ア)、(イ)は該平膜と共通の平面内で一体化されている。膜としては厚さ200μm以下の表面平滑度の高い不織布あるいは高分子多孔膜を装填する。【選択図】図1
