06368849 is referenced by 39 patents and cites 13 patents.

A method and plant for the treatment of an organic waste material in liquid form, e.g. liquid manure from livestock, the method comprising filtering fibres and particles from the liquid, subjecting the liquid to anaerobic fermentation in a biogas reactor, separating a substantially sterile and particle-free permeate stream from the biogas reactor, e.g. using ultrafiltration, subjecting the permeate stream to treatment with an ammonia stripper at an elevated temperature and preferably at reduced pressure to remove substantially all ammonia and carbon dioxide and to result in an ammonia fraction and a nutrient salt fraction, and separating the nutrient salt fraction into a fertiliser concentrate fraction and a water fraction, e.g. using reverse osmosis. The end products of the method are clean water, ammonia concentrate, fertiliser concentrate containing salts of P and K, compost and high-quality biogas with a high methane content.

Title
Method and plant for the treatment of liquid organic waste
Application Number
9/214347
Publication Number
6368849 (B1)
Application Date
March 3, 1999
Publication Date
April 9, 2002
Inventor
Birgir Norddahl
Ringe
US
Agent
Birch Stewart Kolasch & Birch
US
Assignee
Bioscan
US
IPC
C05F 7/00
View Original Source