Patent ID: 9550153
Date: 2017-01-24
CPC Classifications: B01D,C02F,Y02W

Claim:
1. A porous polymer flat-sheet membrane for MBR comprising; a hydrophobic porous polymer membrane forming a network structure, and a sheet substrate supporting it, wherein at least a surface of the hydrophobic porous polymer membrane are coated and fixed with an insolubilized hydroxypropyl cellulose, such that a content ratio of the hydroxypropyl cellulose in the porous polymer flat-sheet membrane is 0.4 to 1.0% by weight and that, when NMR spectrum of the hydroxypropyl cellulose coated on and fixed to the hydrophobic porous polymer membrane is measured using a nuclear magnetic resonance apparatus (proton NMR), an intensity ratio (B/A) of a spectral peak (B) appearing at 4.12 ppm to a spectral peak (A) appearing at 3.75 ppm is 12 to 30%.