Membranes

Nanobubbles—gas bubbles typically below 200 nm in diameter—have gained significant attention across water treatment, aquaculture, agriculture, cleaning, and biomedical applications. Their unique behavior, including long residence time, high surface area, and unusual zeta potential, makes the method of generation critical. Among the many approaches, two dominant technologies have emerged: membrane-based nanobubble generators and Venturi-based nanobubble generators.

Both aim to maximize gas–liquid mass transfer and create high bubble stability, but they differ fundamentally in mechanism, efficiency, scalability, maintenance, and suitability for particular use-cases. This article explores these differences in depth.