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ISO/FDIS 20304-4

Fine bubble technology — Water treatment applications — Part 4: Test method for evaluating the antifouling performance of fine bubble water in crossflow membrane filtration systems

General information

50.20     May 8, 2026

ISO

ISO/TC 281

International Standard

07.030  

Scope

This document specifies a method for measuring the impact of fine bubbles (FBs) on membrane antifouling by employing the membrane fouling index measured under constant transmembrane pressure during crossflow filtration as the evaluation criterion.
This method is applicable to various membrane treatment systems including ultrafiltration, nanofiltration, and reverse osmosis. Additionally, it is suitable for evaluating the water quality of different types of wastewater containing various pollutants such as particulates, colloids, and soluble organic pollutants.

Life cycle

NOW

IN_DEVELOPMENT
ISO/FDIS 20304-4
50.20 Proof sent to secretariat or FDIS ballot initiated: 8 weeks
May 8, 2026

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