07014768 is referenced by 17 patents and cites 34 patents.

A process for removal and recovery of nutrients and recycling of water from digested manure or other organic wastes. A first step involves separating waste from an anaerobic digester into digested liquids, digested solids, and biogas. A second step involves precipitating solids from the digested liquids. A third step involves stripping ammonia from the digested liquids. A fourth step involves injecting an exhaust stream of carbon dioxide drawn from the co-generator into the digested liquids to reduce the pH and raise the temperature of the digested liquid. A fifth step involves recycling the digested liquids back to the anaerobic digester for use in diluting in coming solid wastes. A sixth step involves passing the excess ammonia stripped from the digested liquid through the digested solids to recover nitrogen through aborption with the resultant digested solids being usable as a biofertilizer with a high nitrogen content. A seventh step involves capturing the biogas for use in a co-generation system.

Title
Process for removal and recovery of nutrients from digested manure or other organic wastes
Application Number
10/760725
Publication Number
7014768 (B2)
Application Date
January 20, 2004
Publication Date
March 21, 2006
Inventor
Earl August Jenson
Vegreville
CA
Le Zeng
Vegreville
CA
Xiaomei Li
Edmonton
CA
Agent
Bennett Jones
Assignee
Alberta Research Council
CA
IPC
C05F 3/00
C02F 3/28
View Original Source