The invention is directed to manufacture of
fertilizer having commercial levels of
nitrogen supplemented with organic substances. The process treats
organic matter with acid causing
hydrolysis of organic polymers after which the mix is injected with
nitrogen. The
resultant sterilized and liquefied
organic matter is disbursed over recycled material for the production of granules. Because the process allows for the controlled addition of acids and
ammonia, desired levels of components can be achieved. The process is scalable,
odor controlled and safe thereby allowing for the location of biosolid
processing facilities in most any location. Further, the
fertilizer of the invention provides a dual
nitrogen-release profile when applied to crops. After application to soil,
fertilizer of the invention releases an immediate bolus of nitrogen, similar to traditional
ammonium sulfate, followed by continued slow release of nitrogen typically over a season.