C - Chemistry – Metallurgy – 05 – F
Patent
C - Chemistry, Metallurgy
05
F
C05F 3/00 (2006.01) C02F 3/28 (2006.01) C02F 9/00 (2006.01) C02F 11/04 (2006.01) C05F 17/00 (2006.01) C02F 1/20 (2006.01) C02F 1/52 (2006.01) C02F 11/12 (2006.01)
Patent
CA 2416690
A process for removal and recovery of nutrients from digested manure or other organic wastes. A first step involves separating waste from an anaerobic digester into digested liquids and digested solids. 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 anaerobic digester 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 power generation.
Jenson Earl August
Li Xiaomei
Zeng Le
Alberta Research Council Inc.
Bennett Jones Llp
Highmark Renewables Research Limited Partnership
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