Method for removing and recovering nutrients from wastewater

Details Method for removing and recovering nutrients from wastewater Method for removing and recovering nutrients from wastewater

C - Chemistry, Metallurgy

02

F

362/34

C02F 1/42 (2006.01) B01J 39/00 (2006.01) B01J 49/00 (2006.01)

Patent

CA 1237832

A B S T R A C T METHOD FOR REMOVING AND RECOVERING NUTRIENTS FROM WASTEWATER A method for removing and recovering ammonium and/or potassium and/or phosphate ions from wastewater is presented which comprises: - permitting said wastewater to pass through at least one bed of ion-exchange resins capable of removing selectively those nutrient ions - regenerating those ion-exchange resins with a Na Cl solution or other suitable regenerant solutions so that said nutrient ions may be obtained in a much more concentrated form - adding to said regeneration eluates (or, eventually, directly to wastewater) at least one Mg salt, in proper pH conditions so as to precipitate hydrous MgNH4PO4 and/or MgKPO4, slightly soluble salts of great agronomic value.

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