Nikuni KTM pumps create consistent fine bubble discharges. Fine bubble diameters of air or a gas in a liquid are to be found between 1 and 50 microns, whereas ultra-fine bubbles are found at diameters less than 1 micron
Fine and ultra-fine bubbles
(Please see our technology pages for more downloads and information)
Bubble nomenclature can be confusing with the terms ‘microbubble’ and ‘nanobubble’ being used interchangeably, even in print.
Fine bubbles at a diameter of only 25µm have many uses particularly because, they not only provide an excellent bubble-to-particle ratio for DAF and IAF/IGF applications, but they are small enough to enable good mass-transfer of gasses to liquids.
Fine bubbles are best applied in tanks and vessels rather than in open lagoons or lakes, as their action is essentially gentle rather than the creating strong mixing needed for the treatment of active sludges.
A fine bubble in tap water has a life of approximately 2 minutes, after which it disappears. When a fine bubble disappears, one of two states will have occurred;
a) it may have collapsed and the gas dissolved into the carrier liquid or;
b) it may have split into a large number of ultra-fine bubbles, sometimes called nano-bubbles
Ultra-fine bubbles have been measured with diameters as small as circa 100nm, completely invisible to the human eye and only visible in clusters under the backscattering of green laser light. In simple terms, particles present will reflect whereas fine and ultra-fine bubbles refract light. Whereas fine bubbles have a life rarely extending beyond two minutes, ultra-fine bubbles can exist for many months and in some special cases, for years.
It should be noted that ultra-fine bubbles with diameters of
Current international research is seeking ways of collapsing ultra-fine bubbles at a time of user’s choosing, an area of research in which A&M is active.
The principal current uses of fine bubbles include:
Injecting gasses into liquids
Changing the state of fluids
Separating particles of waste by flotation e.g. DAF/IGF etc.
Cleaning and sterilization
Medical treatments and procedures
Future uses of ultra-fine bubbles include:
Advanced drug delivery
Further new medical treatments
Significant new cleaning techniques
Major advances in sterilization techniques and CIP technologies
Food and drink sector product developments
Fine bubble technologies are a fascinating area of science constantly evolving yielding new discoveries.
Nikuni KTM gas-mixing microbubble generating pumps generate a constant consistent fine bubble stream at an average diameter of 25um. Nikuni KTM pumps are used for separation by flotation, mixing gasses and liquids and for changing the state of fluids.
Applications of Nikuni KTM gas-mixing microbubble (fine bubble) generating aerator pumps for DAF systems and efficient gas-to-liquid transfer in many sectors
Nikuni KTM gas-mixing aerator pumps have been used for over 20 years around the world across many sectors of industry to generate a consistent fine bubble discharge (microbubbles at an average diameter of 25µm) combining many different fluids and gasses.
Nikuni KTM pumps offer a range of fluid flows from 16 lpm to 700 lpm (50Hz operation, 60Hz also possible) and air or gas injection up to 10% of the fluid flow.
Typical applications: • DAF systems • IGF systems • Aeration systems • Aeration of activated sludge • Removal of suspended solids • Waste particle separation • Lagoon aeration • Ambient air into water • Carbon dioxide injection • Chlorine injection • Hydrogen injection • Methane injection • Nitrogen injection • Oxygen injection • Ozone injection • CIP systems • Integrated circuit cleaning • Microbubble • Rendering plants • Paper mill process water recycling • Paint booth drainage • Aquaculture – fish farming • Depuration of shellfish • Marine tank clarification • Soil and ground water remediation • Algae ponds • Fuel systems • Evaporation systems • Spa bath systems
Other uses: • Mixing liquids with other liquids • Mixing powers into liquids
Please play the video shown below, it will provide a good understanding of how the KTM pump works, where it can be applied and why it can reduce energy consumption by 2/3rds when compared with other systems.