Overview
ISO 20480-3:2021 - Fine bubble technology: Methods for generating fine bubbles describes and categorizes practical methods for producing fine bubbles (microbubbles and ultrafine bubbles). Part 3 of the ISO 20480 series focuses on generation principles and provides illustrated examples and terminology references to support consistent communication, design and selection of fine-bubble generating systems.
Key topics
- Scope and structure: Describes methods for generating fine bubbles and cross‑references ISO 20480-1 (terminology) and ISO 20480-2 (attribute categorization).
- Terms and definitions: Aligns generation methods with standardized terms (e.g., cavitation, Venturi tube, micropore, ultrasound, electrolysis).
- Examples of generation methods: Detailed descriptions and schematic examples for many techniques including:
- Swirling flow systems (microbubble and ultrafine variants)
- Static mixer systems
- Ejector and Venturi systems
- Pressurized dissolution systems
- Mechanical shear systems
- Micropore and surfactant‑assisted micropore systems
- Microporous shear, heat separation, mixed vapor condensation
- Electrolytic and ultrasound (cavitation) systems
- Other methods and Annex A with additional examples
- Illustrative schematics: Each method is supported by explanatory figures showing key components (nozzles, throats, micropores, pumps, saturators, etc.).
- Normative linkage: Ensures consistent use of terminology and attribute categorization across the ISO 20480 series.
Practical applications
ISO 20480-3 is useful when selecting, evaluating or specifying fine-bubble generation equipment and processes. Typical application areas include:
- Water and wastewater treatment
- Aquaculture and fisheries
- Industrial process intensification (aeration, flotation)
- Surface cleaning, oxidation and mass‑transfer operations
- R&D and pilot testing of fine‑bubble technologies
The standard helps purchasers, designers and system integrators compare generation principles (e.g., Venturi vs. micropore vs. pressurized dissolution) and understand operational trade-offs such as pumping and saturation approaches.
Who should use this standard
- Equipment manufacturers and system designers developing fine bubble generators
- Process and environmental engineers specifying aeration or flotation equipment
- R&D teams evaluating generation principles and scale‑up options
- Procurement and standards professionals who need consistent terminology and performance categorization
Related standards
- ISO 20480-1 - Terminology for fine bubble technology
- ISO 20480-2 - Categorization of attributes of fine bubbles
Keywords: ISO 20480-3, fine bubble technology, methods for generating fine bubbles, microbubble generation, ultrafine bubble, Venturi, ejector, micropore, pressurized dissolution, ultrasound cavitation.
Open preview (PDF)Fine bubble technology — General principles for usage and measurement of fine bubbles — Part 3: Methods for generating fine bubbles
