Liquid purification or separation – Processes – Treatment by living organism
Reexamination Certificate
2006-03-21
2006-03-21
Prince, Fred G. (Department: 1724)
Liquid purification or separation
Processes
Treatment by living organism
C210S631000, C210S903000, C210S906000, C071S010000, C071S021000
Reexamination Certificate
active
07014768
ABSTRACT:
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.
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Jenson Earl August
Li Xiaomei
Zeng Le
Alberta Research Council Inc.
Bennett Jones LLP
Prince Fred G.
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