| abstract |
An ozone-oxygen gas stream produced by passing oxygen into an ozone generatorn(A) is introduced into a membrane separation unit (B) containing an ozone-permeablenmembrane (6). Ozone-enriched gas passes through the membrane (6) and isnrecovered or it contacts a liquid or gas stream which contains ozone-reactivensubstances, thereby oxidizing the substances. The oxygen-enriched gas streamnproduced on the feed side (8) of the membrane (6) by permeation of ozone throughnthe membrane (6) is recycled to the ozone generator (A). Prior to being recycled, thenoxygen-enriched stream may be purified to remove gaseous impurities whichnpermeate through the membrane (6) from the liquid or gas stream being treated. |