Derek D Nelson

US Patent:

61744727, Jan 16, 2001

Filed:

Sep 3, 1998

Appl. No.:

9/145939

Inventors:

Ernest W. Johnson - Frenchtown MT
Derek D. Nelson - Frenchtown MT

International Classification:

B29C 6708
C05F 700
C05F 1108

US Classification:

264118

Abstract:

The instant process forms a pellet comprised of at least sixty percent composted sewer sludge, up to forty percent cellulosic plant material and up to fifteen percent nutrient materials and chemicals for soil enhancement and plant nutrition that provides a combination of both long and short term beneficiation of soil and herbage and has no pathogenic microbes above regulatory ranges. The composted sewer sludge comprises primary sewer sludge admixed with cellulosic plant material that is thermally treated at temperatures between 140 and 180 degrees F. during composting to destroy mesophyllic pathogenic microbes and the viability of reproducible botanicals including seeds, but leave most thermophilic soil enhancing microbes in a viable state. Additional fibrous cellulosic material and chemicals are admixed with the composted sewer sludge and the mixture pelletized in a thermal process that raises pellet temperature to between 140 to 180 degrees F. The nutrient and chemical materials selectively comprise nitrogenous fertilizers, phosphate, potash, trace elements, herbicides, insecticides and botanical chemicals.