How do nanobubbles affect oxygen use?

Short Answer:

They help oxygen stay available in the water longer, allowing microorganisms to use it more effectively.

In-Depth Answer:

Rather than increasing bulk dissolved oxygen levels, nanobubble pretreatment is associated with improved oxygen utilization efficiency and more stable oxygen availability. By reducing biological stress and inhibition, nanobubbles can support healthier, more active biomass that uses oxygen and substrates more efficiently. In some applications, this improved utilization allows existing aeration systems to operate at reduced blower output while maintaining treatment performance.