Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1995-11-21
1998-06-30
Lander, Ferris
Chemistry: fertilizers
Processes and products
Organic material-containing
71 15, 71 21, 71 22, 71 6404, 71 6413, 71904, 241 2, C05F 1108
Patent
active
057727210
ABSTRACT:
A substantially odorless and sterilized fertilizer in pellet form is produced by combining a dry organic waste material and a dry binder material, then combining the resulting dry mixture with steam, water and/or further organic waste in the form of sludge. The resulting material is provided to an extruder for a more thorough, dispersive mixing, a pressure increase to at least 100 psi, and heating above the glass transition temperature of the binder, and more preferably to at least about 125.degree. C. to substantially sterilize the material mass. The extruded material is forced through a die and released to an ambient environment, rapidly reducing pressure of the material and thereby lysing spores and microorganisms surviving conditions within the extruder. The emerging material is segmented and dried, or segmented and tumbled to form pellets, then dried. When dried to a moisture content of at most 7%, the pellets further can be inoculated with an active agent within an adhesive, resulting in a final moisture content of 10-14%.
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Lander Ferris
Niebuhr Frederick W.
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