Patent ID: 6875357

Claim:
A three-phase process for the treatment of waste water comprising: an initial mix fill phase having a predetermined duration in which waste water is continuously directed into a vessel containing an activated sludge, the waste water is continuously mixed with the activated sludge and the vessel environment is controlled to provide an anaerobic time period for achieving phosphorous release and denitrification of oxidized nitrogen in the vessel throughout the mix fill phase; followed by a react fill phase having a predetermined duration in which continuous waste water flow into the vessel continues and the waste water is exposed to intermittent aeration and continuous mixing to promote completely mixed aerobic and anoxic conditions; followed by a react discharge phase having a predetermined duration in which there is no waste water flow into the vessel, the waste water is continuously exposed to alternating periods of aerobic and anoxic conditions, and during this exposure to alternating periods of aerobic and anoxic conditions the waste water is continuously directed to a membrane device to separate suspended solids from the liquid in the waste water.