Venturi

Cavitation is a physical phenomenon that occurs when rapid pressure changes in a liquid cause the formation, growth, and sudden collapse of vapor-filled cavities (bubbles). While it may sound simple, cavitation is a high-energy process capable of producing extreme local temperatures, shockwaves, and chemical reactions.

In water treatment, pumps, turbines, and advanced oxidation systems, cavitation can be either a damaging problem — or a powerful tool.

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.