Patents Assigned to HSY HELSINGIN SEUDUN YMPÄRISTÖPALVELUT-KUNTAYHTYMÄ
  • Patent number: 10351428
    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.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: July 16, 2019
    Assignee: HSY HELSINGIN SEUDUN YMPÄRISTÖPALVELUT-KUNTAYHTYMÄ
    Inventors: Tommi Fred, Mari Heinonen, Paula Lindell, Sini Reuna