Chemistry: fertilizers – Processes and products – Organic material-containing
Patent
1995-04-12
1997-04-01
Lander, Ferris
Chemistry: fertilizers
Processes and products
Organic material-containing
423358, C05F 300
Patent
active
056161638
ABSTRACT:
Method for the processing of animal excrements and liquid manure--called liquid materials--for the purpose of utilization of the ammonia contained in the liquid materials as a chemically bound non fugitive plant fertilizer, as well as the thermal disposal of the chemical unreactive, environmental hazardous ingredients of the liquid materials, respectively of the residues remaining from the processing like ammonia residues, methane gas or gaseous odorous compounds, for example of the skatole--or mercaptan type, wherein said the ammonia unbound and/or solubilized in the liquid materials is transformed into a non fugitive, easy resorbable nitrogen fertilizer for plants by adding carbon dioxide and gypsum to the liquid materials and using stable exhaust as preferred carbon dioxide source and the liquid materials are generally purified by the striping method from the odorous substances, ammonia residues or, from the stable exhaust originating methane by feeding in air or especially stable exhaust and which are combusted thermally catalytically or supported by a fuel gas, when they leave the installation.
REFERENCES:
patent: 4872998 (1989-10-01), Dausman et al.
patent: 5071622 (1991-12-01), Dunson, Jr.
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