Patents by Inventor Bertil Carlson

Bertil Carlson 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 and apparatus for production of biogas from an organic material
    Patent number: 7927848
    Abstract: In a method of producing biogas by anaerobic digestion of organic matter, organic matter is dried to a dry solids content of at least 50% by weight TS and pelletized and then mixed with a liquid to form a slurry. The slurry is contacted with biogas-producing bacteria for digestion under anaerobic conditions in a reactor (102) while producing biogas.
    Type: Grant
    Filed: July 7, 2003
    Date of Patent: April 19, 2011
    Assignee: Tekniska Verken I Linkoping AB
    Inventors: Stig Holm, Jörgen Ejlertsson, Bertil Carlson
  • Method and device for producing biogas
    Publication number: 20060102560
    Abstract: A method of producing biogas by anaerobic digestion of organic matter comprises the steps of grinding organic matter, mixing the organic matter with a liquid to form a slurry with a dry solids content of 15-45% by weight TS, feeding the slurry to a tank reactor (2) and, in the tank reactor, contacting the slurry with biogas-producing bacteria for digestion under anaerobic conditions, and digesting the slurry in the tank reactor (2) at a dry solids content of 5-10% by weight TS while producing biogas. A device (1) for producing biogas by anaerobic digestion of organic matter comprises a sealable, essentially gas-tight tank reactor (2) having an inlet (4) for organic matter and outlets (6, 8) for produced biogas and formed digested sludge. The device (1) has a premixing tank (18) for mixing ground organic matter with a liquid to a slurry with a dry solids content of 15-45% by weight TS and a feed pipe (26, 4) for feeding the slurry to the tank reactor (2).
    Type: Application
    Filed: July 7, 2003
    Publication date: May 18, 2006
    Inventors: Stig Holm, Jorgen Ejlertsson, Bertil Carlson
  • Method and apparatus for production of biogas from an organic material
    Publication number: 20060006111
    Abstract: In a method of producing biogas by anaerobic digestion of organic matter, organic matter dried to a dry solids content of at least 50% by weight TS and pelletised is mixed with a liquid to form a slurry. The slurry is contacted with biogas-producing bacteria for digestion under anaerobic conditions in a reactor (102) while producing biogas. A device (100) for producing biogas by anaerobic digestion of organic matter comprises a sealable, essentially gas-tight reactor (102) having an inlet (104) for organic matter and outlets (106, 108) for produced biogas and formed digested sludge. The device (100) comprises a premixing tank (118) for mixing organic matter dried to a dry solids content of at least 50% by weight and pelletised, with a liquid to a slurry and a feed pipe (104) for feeding the slurry to the reactor (102).
    Type: Application
    Filed: July 7, 2003
    Publication date: January 12, 2006
    Inventors: Stig Holm, Jorgen Ejlertsson, Bertil Carlson