Patent ID: 8496827
Filing Date: 2013-07-30
Classification: C02F,C05B,C05F,Y02P,Y02W,Y10S

Abstract:
1. A waste treatment process, comprising: (a) producing a first mixture of solids, microorganisms and liquid from waste water, and wherein said microorganisms contain phosphorus and magnesium; (b) removing phosphorus and magnesium from the microorganisms and permitting said removed phosphorus and magnesium to dissolve in a liquid portion of said first mixture, wherein said removing step includes adding readily biodegradable carbon compounds (RBCs) to said first mixture, thereby to produce a treated mixture that includes dissolved magnesium and phosphorus; (c) fermenting and thickening said treated mixture to produce a phosphorus-rich and magnesium-rich liquid that is separated from a remaining phosphorus-reduced and magnesium-reduced mixture; (d) further anaerobic treating said phosphorus-reduced and magnesium-reduced mixture, thereby creating an ammonia-rich, phosphorus-reduced and magnesium-reduced mixture; (e) dewatering said ammonia-rich mixture to produce ammonia-rich liquid; and (f) mixing said ammonia-rich liquid with said phosphorus-rich and magnesium-rich liquid, to produce struvite.