POROUS MEMBRANE

Provided is a porous membrane having high filtration performance and little deterioration of water permeation performance due to membrane surface abrasion when used in a method of clarifying, by membrane filtration, turbid water that is natural water, domestic wastewater, or water resulting from tre...

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Bibliographic Details
Main Authors MATSUYAMA, Ayu, FUJIMURA, Hirokazu, UMEMOTO, Hiroki, MIKI, Yuki
Format Patent
LanguageEnglish
Published 21.12.2023
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:Provided is a porous membrane having high filtration performance and little deterioration of water permeation performance due to membrane surface abrasion when used in a method of clarifying, by membrane filtration, turbid water that is natural water, domestic wastewater, or water resulting from treatment thereof. In the porous membrane, a ratio of internal porosity in a thickness up to 0.12% of membrane thickness from a topmost surface of a surface at a filtration feed side relative to surface porosity of the surface at the filtration feed side is 1.05 or more.
Bibliography:Application Number: US202118253210