A lot of work goes into minimizing cavitation in marine systems as it tends to waste energy and cause damage to propellers. That being said, there has been a lot of research lately into using sustained cavitation to purify and distil water. The energy released can be enough to boil water, kill pathogens, and generate free radicals to further sterilize the water.

https://iwaponline.com/wst/article/86/2/302/89569/Hydrodynam...