Abstract: Liquid, especially water, flowing at a first velocity and at a first pressure in a line having a first cross-sectional area, is deaerated by flowing said stream into and through a region in said line having a second cross-sectional area less than said first cross-sectional area, whereupon in said region the velocity of said stream increases, the pressure of said stream decreases, and gas dissolved in said stream evolves from said stream, and recovering said evolved gas separately from said liquid before it redissolves into said liquid.

Abstract: A surface is sanitized by manufacturing a gaseous stream of ozone from oxygen having a purity of at least 90 vol. %, and injecting it directly into a stream of water having a pH of 6.5-7.5, feeding said aqueous solution of ozone into a tank which maintains a gaseous atmosphere comprising ozone over the solution, applying said aqueous solution of ozone from said tank onto a surface to be sanitized; and recovering water from said surface and recycling it to said source.