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Process for producing odorless organic and semi-organic fertilizer

  • US 5,772,721 A
  • Filed: 11/21/1995
  • Issued: 06/30/1998
  • Est. Priority Date: 11/21/1995
  • Status: Expired due to Fees
First Claim
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1. A process for forming a substantially odorless fertilizer from organic waste material, comprising:

  • combining an organic waste material and a binder material consisting essentially of a carbohydrate or a protein, with moisture to provide a mixture material including 18-65% moisture, by weight;

    mechanically working the mixture material to dispersively mix the mixture material while heating the mixture material to at least a glass transition temperature of the binder material, to form an amorphous, substantially uniform matrix;

    while maintaining the matrix at a temperature above the glass transition temperature, further mechanically working and mixing the matrix within an anaerobic environment while heating the matrix to increase its temperature to at least 100°

    C. and increasing its pressure to at least about 100 psi; and

    expelling the matrix from the anaerobic environment to an ambient environment, thus to abruptly reduce the pressure of the matrix to an ambient level, thereby lysing spores and organisms carried by the matrix whereby the expelled material is substantially sterilized.

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