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Method and system for preparation of substrate for use in anaerobic digestion of organic waste

  • US 10,597,629 B2
  • Filed: 03/01/2016
  • Issued: 03/24/2020
  • Est. Priority Date: 09/02/2013
  • Status: Active Grant
First Claim
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1. A method for preparation of a substrate for use in anaerobic digestion of organic waste, the method being implemented in a substrate pretreatment system, the method comprising:

  • a) simultaneously loading under pressure into an airtight chamber within the substrate pretreatment system i) an organic substrate, wherein the organic substrate comprises a liquid and a solid phase of the organic waste; and

    ii) a heated organic fluid from a bioreactor, to form a mixture;

    b) simultaneously heating and degassing the mixture, wherein the mixture is heated to and maintained at a temperature of about 37°

    C. to sustain growth of microorganisms;

    c) subjecting the mixture of step b) to treatment of an ultrasonic hydrodynamic device in a closed loop to create vibrations in the mixture that cause;

    i) periodic pressure;

    ii) cavitation;

    or iii) both i) and ii) to break down cell walls within the ultrasonic hydrodynamic device comprising a radiator which is connected to the airtight chamber to form the closed loop, and wherein the mixture is circulating within the closed loop during the treatment; and

    d) transferring the mixture of step c) to the bioreactor.

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