Description
Ultrasonic sterilization uses high‑frequency acoustic waves to inactivate microorganisms in liquids while keeping bulk temperatures low.
Technical
High‑frequency sound waves (20–100 kHz) generate cavitation bubbles that collapse, producing localized temperatures up to ~500 °C and pressures >1 000 atm. The extreme micro‑environment ruptures microbial cell membranes and denatures proteins, leading to rapid inactivation. Because the bulk liquid remains below 40 °C, heat‑sensitive nutrients and flavors are largely preserved.
Science
Primary Reaction
Cavitation‑induced microbial inactivation via localized high temperatures and pressures
Sensory Profile
Aroma ()
neutralcleanfreshsubtlesterile
Origin & History
Civilization
Japanese and European
Era