Abstract: Natural biomineral fertilizers for sustainable farming are produced in an environmentally sound manner from mine waste. Finely divided mine waste and process tailings serve as a novel source of rock powder for use as fertilizer. Mine waste and process tailings may be treated with non-toxic chemicals to selectively remove certain unwanted elements such as mercury. Solid and liquid fertilizers are also obtained by digesting mine waste and process tailings in combination with bio-waste plus selected bacteria under anaerobic conditions. Anaerobic digestion also generates methane gas for use as fuel for generating electricity or for process heating.
Type:
Grant
Filed:
May 1, 2017
Date of Patent:
July 16, 2019
Assignee:
Advanced Materials Processing, Inc.
Inventors:
Leonard Nanis, Dennis Amoroso, James Shumard, Garrett Chavez, Thomas Sharples, Ryan Sigler