ISO 20480-2:2018

INTERNATIONAL ISO
STANDARD 20480-2
First edition
2018-11
Fine bubble technology — General
principles for usage and measurement
of fine bubbles —
Part 2:
Categorization of the attributes of
fine bubbles
Technologie des fines bulles — Principes généraux pour l'utilisation et
la mesure des fines bulles —
Partie 2: Classification des attributs des fines bulles
Reference number
ISO 20480-2:2018(E)
©
ISO 2018

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ISO 20480-2:2018(E)

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ii © ISO 2018 – All rights reserved

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ISO 20480-2:2018(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General principles for usage and measurement of fine bubbles . 1
4.1 Standards system of fine bubble technology . 1
4.2 Quality of liquid medium. 2
5 Expression of attributes for fine bubbles . 2
5.1 Application of size index and number concentration index . 2
5.1.1 General. 2
5.1.2 Size index rules . 3
5.1.3 Number concentration principles . 3
5.1.4 Number concentration index rules . 3
5.2 Expression of class of fine bubbles in dimensional characteristics . 3
6 Classification of the attributes of fine bubbles by rise velocity . 4
6.1 Attributes of fine bubbles by rise velocity . 4
6.2 Classification of fine bubbles by rise velocity. 5
6.2.1 General. 5
6.2.2 Classification and definition of regions . 6
Annex A (informative) Observation examples of ultrafine bubble number stability in liquid
...