Method of phosphorus removal and recovery
AssigneeHsy Helsingin Seudun YmpäRistöPalvelut-Kuntayhtymä
InventorsTommi Fred, Mari Heinonen, Paula Lindell, Sini Reuna
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Abstract
A method for removal and recovery of phosphorus includes a precipitation step for precipitating phosphorus from a liquid stream comprising at most 30 mg of phosphorus per liter and at most than 50 mg of suspended solids per liter, using a precipitation agent, to form a precipitate, to form a precipitate; a first separation step for separating the precipitate from the liquid stream; a dissolution step for dissolving the precipitate in phosphoric acid to obtain a first solution; and a second separation step for separating the phosphoric acid and the precipitation agent.
Claims15
A method for removal and recovery of phosphorus, comprising
- a) a precipitation step for precipitating phosphorus from a liquid stream comprising at most 30 mg of phosphorus per liter and at most 50 mg of suspended solids per liter, using a precipitation agent, to form a precipitate,
- b) a first separation step for separating the precipitate from the liquid stream,
- c) a dissolution step for dissolving the precipitate in phosphoric acid to obtain a first solution, and
- d) a second separation step for separating the phosphoric acid and the precipitation agent.
Dependencies are inferred from the claim text.