High value organic-enhanced inorganic fertilizers
First Claim
1. A method for manufacture of a fertilizer comprising:
- providing an organic material containing biosolids wherein the organic material has a solids content of at least ten percent;
adding an odor control agent to the organic material to create a mixture;
adding an acid to the mixture under a first pressure and elevated temperature for a first period of time forming a liquefied mixture;
adding ammonia to the liquefied mixture under a second pressure and elevated temperature for a second period of time; and
processing the liquefied mixture to form the fertilizer.
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Accused Products
Abstract
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.
183 Citations
40 Claims
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1. A method for manufacture of a fertilizer comprising:
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providing an organic material containing biosolids wherein the organic material has a solids content of at least ten percent; adding an odor control agent to the organic material to create a mixture; adding an acid to the mixture under a first pressure and elevated temperature for a first period of time forming a liquefied mixture; adding ammonia to the liquefied mixture under a second pressure and elevated temperature for a second period of time; and processing the liquefied mixture to form the fertilizer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A process for manufacture of a fertilizer with a predetermined content of one or more of nitrogen, phosphate and potassium comprising:
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providing an organic material containing biosolids wherein the organic material has a solids content of at least ten percent; adding an odor control agent to the organic material to create a mixture; heating the mixture under a first pressure to a first temperature for a first period of time; adding an amount of a predetermined acid to the heated mixture, thereby creating an exothermic reaction and forming a liquefied mixture; adding a predetermined amount of ammonia to the liquefied mixture under a second pressure and heating the mixture to a second temperature for second period of time, wherein the amount of ammonia added is determined from the composition of the organic material; and processing the liquefied mixture to form the fertilizer with a predetermined content of one or more of nitrogen, phosphate and potassium. - View Dependent Claims (29, 30, 31, 32)
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33. A method for manufacture of a product comprising:
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providing an organic material wherein the organic material has a solids content of at least ten percent; adding an acid to the organic material under a first pressure and elevated temperature for a first period of time forming a liquefied mixture; adding ammonia to the liquefied mixture under a second pressure and elevated temperature for a second period of time; and processing the liquefied mixture to form the product. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40)
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Specification