Patent ID: 7604740
Filing Date: 2009-10-20
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 said microorganisms and permitting said phosphorus and magnesium to dissolve in said liquid, to produce a treated mixture that includes dissolved magnesium and phosphorus; (c) thickening said treated mixture to produce a phosphorus and magnesium-rich liquid that is separated from the remaining phosphorus and magnesium-reduced mixture; (d) further anaerobic treating said phosphorus and magnesium-reduced mixture, thereby creating an ammonia-rich, phosphorus 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 and magnesium-rich liquid, to produce struvite.