ISO 24261-2 is one of a series of documents for fine bubble technology that specifies the elimination techniques for removing fine bubbles from fine bubble dispersion in water and how to optimize the elimination procedures to obtain better efficiency.
ISO 24261-2 is applicable to fine uncoated bubbles (without shells).
It does not apply to fine-coated bubbles (with shells).
NOTE: Fine bubbles dispersed in liquid are classified into “fine bubble with shells” and “fine bubble without shells”. A fine bubble with shells means the fine bubble whose surface/interface is covered almost completely by an object or a collection of objects.
ISO 24261-2 on fine bubble technology is useful for-
Methods are needed to evaluate the efficacy and efficiency of generation systems. The characteristics of most importance are the number concentration and size indices of the fine bubbles produced by such systems, fine bubble dispersions in water can contain other solid and liquid particles. Contaminants such as these particles make accurate characterization of fine bubbles extremely difficult. Therefore, the distinction of fine bubbles from contaminants is an urgent issue. This is also why the term index is used as it can never be 100 % established that a particle is a bubble and not a contaminant.
ISO 24261-2 guidelines will help you test methods to evaluate the number concentration index and the size index of particles. There are a few methods to distinguish bubbles in fine bubble dispersions from other particles. If a method that eliminates fine bubbles in a specific size range is used, it is potentially possible to distinguish fine bubbles from other solid and liquid particles. The concentration of material after potential elimination can be compared in particle concentration index to the liquid used prior to generation. If elimination has been successful, they should be the same, and by this comparison, elimination techniques can be developed and optimized.
ISO 24261-2