Patents by Inventor Paula Lindell

Paula Lindell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of phosphorus removal and recovery
    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
  • METHOD OF PHOSPHORUS REMOVAL AND RECOVERY
    Publication number: 20170275167
    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 litre and at most than 50 mg of suspended solids per litre, 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: Application
    Filed: March 23, 2017
    Publication date: September 28, 2017
    Inventors: Tommi Fred, Mari Heinonen, Paula Lindell, Sini Reuna