Installation for charging liquids, particularly fermentation liquids, with gas

Apparatus for gasing liquids comprising a reaction vessel for containing liquid to be gassed, a separator element located within and towards the bottom of said vessel, said separator element constituting gravity operated means effective to separate medium in the separator into a primarily gaseous phase and a primarily liquid phase, a first conduit leading from a region of said separator at which said gaseous phase accumulates upwardly to a region of said vessel above the level of liquid therein, throttling means at the upper end of said first conduit means, second conduit means leading from a region of said separator at which said primarily liquid phase accumulates to a centrifugal pump disposed outside said vessel, said centrifugal pump having a central outlet for gas from said primarily liquid phase, third conduit means leading from said gas outlet to a second separator, fourth conduit means returning liquid from said second separator to said vessel above the level of liquid therein, said centrifugal pump having a peripheral outlet for liquid from said primarily liquid phase, fifth conduit means leading from said peripheral outlet to means disposed above the level of liquid in said vessel for entraining a gas in said liquid and for injecting said liquid and entrained gas into liquid in said vessel.