Abstract: A liquid flow distributor for dispersing wastewater or other liquid carrying stringy solids throughout a particulate media such as in a fluidized bed reactor. The distributor is adapted to allow unimpeded forward flow of the liquid into the media and it also functions to minimize backflow of the media into the distributor should forward flow be arrested. The distributor includes an array of like nozzles, each having an inlet port leading into a conical flow expansion section whose cone angle is such that the nozzle capable of flowing full without significance turbulence, the mouth of the flow expansion section merging with a cylindrical outlet section whose dimensions are such that any backflow which takes place when forward flow is arrested will normally be insufficient to lift the bed particles into the nozzle.

Abstract: A gas transfer system adapted to dissolve a gas or other compressible fluid in a relatively non-compressible liquid such as waste water with a minimum expenditure of energy. The system makes use of a drum divided by radial vanes into liquid chambers. Rotation of the vanes causes the chambers to rotate about the central axis of the drum whereby in the course of every operating cycle, each chamber is brought into operative relation with the respective interfaces of an inflow station, a gas transfer station and an outflow station. At the inflow station, raw liquid to be treated is fed into the chamber then in operative relationship therewith to produce a liquid batch therein. Concurrently, at the transfer station another batch of raw liquid in the chamber then in operative relation therewith is subjected to pressurized gas to effect the absorption of the gas by the liquid.