Abstract: A multi-stage process and system for treating organic waste materials includes steps of hydrolyzing the materials in an anaerobic vessel, transferring the liquid product of hydrolysis to an anaerobic digester, and further decomposing the waste materials under aerobic conditions to yield a compost product usable as a soil amendment. Biogas produced by digestion of the hydrolysis liquid product may be burned to generate electricity or heat, and the liquid digester product may be recirculated for use as an inoculant to aid hydrolysis of subsequently processed batches of waste materials.
Type:
Grant
Filed:
January 6, 2005
Date of Patent:
January 8, 2008
Assignee:
Alta Environmental Services, Inc.
Inventors:
Chris E. Choate, Paul A. Sherman, Ruihong Zhang
Abstract: A multi-stage process and system for treating organic waste materials includes steps of hydrolyzing the materials in an anaerobic vessel, transferring the liquid product of hydrolysis to an anaerobic digester, and further decomposing the waste materials under aerobic conditions to yield a compost product usable as a soil amendment. Biogas produced by digestion of the hydrolysis liquid product may be burned to generate electricity or heat, and the liquid digester product may be recirculated for use as an inoculant to aid hydrolysis of subsequently processed batches of waste materials.
Type:
Grant
Filed:
April 30, 2003
Date of Patent:
March 21, 2006
Assignee:
Alta Environmental Services, Inc.
Inventors:
Chris E. Choate, Paul A. Sherman, Ruihong Zhang