METHOD AND SYSTEM FOR THE CRYSTALLISATION OF STRUVITE FOR RECOVERING PHOSPHATES IN WASTEWATER

METHOD AND SYSTEM FOR THE CRYSTALLISATION OF STRUVITE FOR RECOVERING PHOSPHATES IN WASTEWATER

The invention relates to a method and a system for struvite crystallization of in order to recover phosphates in urban or industrial wastewater preferably having phosphate concentrations higher than 50 mg P/L, more preferably higher than 100 mg P/L, where phosphates are recovered by means of the cry...

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Bibliographische Detailangaben
Hauptverfasser: GARRIDO FERNÁNDEZ, Juan Manuel, CRUTCHIK PEDEMONTE,Dafne
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMISTRY
METALLURGY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:The invention relates to a method and a system for struvite crystallization of in order to recover phosphates in urban or industrial wastewater preferably having phosphate concentrations higher than 50 mg P/L, more preferably higher than 100 mg P/L, where phosphates are recovered by means of the crystallization thereof in the form of struvite granules, the diameter of which can reach up to 5 mm. The struvite crystallization system is formed by a crystallizer (1), a decanter (2) with a distribution system (9), and a unit for adding industrial magnesium hydroxide (3). The phosphates are recovered from the wastewater as a result of two steps : a step of growing struvite granules, and a step of growing fine struvite crystals.