Patent ID: 11964892
Assignee: MONSANTO TECHNOLOGY LLC
Field: Environmental technology (Chemistry)
Classification: CPC C | IPC C

Claim 13:
14. A process for recovery of phosphorus from a waste stream comprising inorganic phosphorous, the process comprising:
contacting at least a portion of the waste stream with a precipitant, thereby forming within the waste stream phosphate containing precipitates, to produce a precipitant treated stream, wherein the waste stream has a pH of from about 3 to about 7 when initially contacted with the precipitant, wherein the precipitant is selected from the group consisting of FeCl3, Al2(SO4)3, CaO, and combinations thereof;
subjecting at least a portion of the precipitant treated stream to biological treatment by microorganisms to form a biologically treated waste stream; and
recovering a phosphate containing cake from the biologically treated waste stream, thereby forming a treated waste stream, wherein at least a portion of the waste stream is contacted with an oxidizing agent prior to contact of the waste stream with the precipitant, to form an oxidized treated stream and thereby oxidizing at least one organic phosphorus compound to form phosphate (PO43−), and wherein the oxidized treated stream is contacted with the precipitant.