Patent ID: 8894856
Filing Date: 2014-11-25
Classification: C02F,Y02E,Y02W,Y10S

Abstract:
1. A process for treating wastewater comprising: providing wastewater comprising dissolved and suspended solids; promoting aggregation of at least a portion of the dissolved and suspended solids to produce a first mixed liquor; separating the first mixed liquor into a first solids-lean portion and a first solids-rich sludge; anaerobically digesting a first portion of the first solids-rich sludge to produce an anaerobically digested sludge; separating the anaerobically digested sludge into a second solids-lean portion and a second solids-rich sludge; precipitating one of a phosphorous containing compound and a nitrogen containing compound from the second solids-lean portion; and combining a portion of the second solids-rich sludge with the wastewater.