Patent ID: 9505644
Filing Date: 2016-11-29
CPC Classification: C02F,Y02W,Y10S

Claim Text:
1. A process for treating wastewater to simultaneously remove organic matter, nitrogen, and phosphorus, the process comprising: providing two or more streams in a first tank operating under anoxic conditions, the two or more streams including plant influent wastewater and return activated sludge; mixing the plant influent wastewater and the return activated sludge in the first tank to form a mixed liquor; transferring the mixed liquor to a second tank operating under microaerophilic conditions to simultaneously effectuate nitrification, denitrification, phosphorous release, and phosphorus uptake in the second tank; and transferring the mixed liquor to a third tank that separates treated effluent from activated sludge containing microorganisms, wherein a first portion of the activated sludge is returned to the first tank as the return activated sludge and a second portion of the activated sludge is returned to the second tank.