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Method and system for the production of biofertilisers

  • US 8,124,401 B2
  • Filed: 06/02/2006
  • Issued: 02/28/2012
  • Est. Priority Date: 06/02/2005
  • Status: Active Grant
First Claim
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1. A method for drying a sludge mixture containing organic waste comprising the steps of:

  • a) obtaining a sludge mixture having a percentage of dry matter between 10 and 40%;

    b) drying said sludge mixture by exothermic biodrying at a temperature between 50 and 75°

    C., for 3 to 20 days to obtain dehumidified organic matter that has reduced pathogenic microorganism population and having less odor;

    c) recovering thermal energy released from step b) to direct it towards a drying unit; and

    d) further drying the organic matter of step b) in said drying unit by applying the thermal energy recovered in step c) until obtaining a dried organic matter that is disinfected, odorless and with a moisture content of less than 30%.

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