Abstract: The invention relates to a method and a device for producing nitrogen fertilizer from organic waste products in the liquid phase (suspension, emulsion, solution) and for hygienizing the wastes or reducing the emissions by thermal treatment using mineral or organic additions. According to the invention, this is achieved by a method, wherein the waste product is heated at underpressure to temperatures between 40 and 90° C., the escaping gas containing carbon dioxide and ammonia is cooled down and introduced into an aqueous absorption agent, the nitrogen fertilizer formed thereby is discharged and the excess gas not having been absorbed and containing carbon dioxide is pumped back into the discharge container, wherein the underpressure generated at the beginning of the process by a vacuum pump is autogenously maintained by the progress of the process.
Type:
Grant
Filed:
November 15, 2004
Date of Patent:
February 15, 2011
Assignee:
Phoenix Beteiligungs GmbH
Inventors:
Herbert Spindler, Ute Bauermeister, Thomas Meier, Michael Teske
Abstract: The invention relates to a method and a device for producing nitrogen fertilizer from organic waste products in the liquid phase (suspension, emulsion, solution) and for hygienizing the wastes or reducing the emissions by thermal treatment using mineral or organic additions. According to the invention, this is achieved by a method, wherein the waste product is heated at underpressure to temperatures between 40 and 90 ° C., the escaping gas containing carbon dioxide and ammonia is cooled down and introduced into an aqueous absorption agent, the nitrogen fertilizer formed thereby is discharged and the excess gas not having been absorbed and containing carbon dioxide is pumped back into the discharge container, wherein the underpressure generated at the beginning of the process by a vacuum pump is autogenously maintained by the progress of the process.
Type:
Application
Filed:
November 15, 2004
Publication date:
March 22, 2007
Applicant:
PHOENIX BETEILIGUNGS GMBH
Inventors:
Herbert Spindler, Ute Bauermeister, Thomas Meier, Michael Teske