Patent ID: 9725371
Date: 2017-08-08
CPC Classifications: C05B,C05C,C05D,C05F,C05G

Claim:
1. A method for preparing a soil amendment comprising: providing a biomass to a pyrolysis unit; pyrolyzing the biomass in the pyrolysis unit to produce a stable biochar core that has a rate of degradation that is less than 2.5% per year, wherein the biomass is pyrolyzed at a heating rate from 0.01° C./second up to 1000° C./second and at least one of (i) a temperature greater than 250° C. and (ii) a heating time greater than 0.001 days; and using the stable biochar to form a soil amendment for placement in a soil bed, wherein the soil amendment has a total phosphorus and a total nitrogen content that provides a concentration of available phosphorus and available nitrogen suitable to promote growth of an organism in the soil bed, which concentration of available phosphorus is at least about 1 part per million (ppm) and available nitrogen is at least about 1 ppm.