US 11,858,823 B2
Process to recover ammonium bicarbonate from wastewater
Dominic Bassani, Dix Hills, NY (US); Morton Orentlicher, New York, NY (US); Mark M. Simon, Wilbraham, MA (US); and Stephen Pagano, Pine Level, NC (US)
Assigned to BION ENVIRONMENTAL TECHNOLOGIES, INC., Old Bethpage, NY (US)
Filed by BION ENVIRONMENTAL TECHNOLOGIES, INC., Old Bethpage, NY (US)
Filed on Jan. 31, 2022, as Appl. No. 17/589,037.
Application 17/589,037 is a continuation of application No. 16/790,390, filed on Feb. 13, 2020, granted, now 11,254,581.
Application 16/790,390 is a continuation of application No. 15/638,193, filed on Jun. 29, 2017, granted, now 10,604,432, issued on Mar. 31, 2020.
Application 15/638,193 is a continuation in part of application No. 14/852,836, filed on Sep. 14, 2015, granted, now 10,106,447, issued on Oct. 23, 2018.
Claims priority of provisional application 62/133,549, filed on Mar. 16, 2015.
Claims priority of provisional application 62/103,191, filed on Jan. 14, 2015.
Prior Publication US 2022/0227637 A1, Jul. 21, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C01C 1/26 (2006.01); C02F 9/00 (2023.01); B01D 9/00 (2006.01); C05C 11/00 (2006.01); C02F 1/44 (2023.01); C02F 103/20 (2006.01); C02F 3/28 (2023.01); C02F 1/02 (2023.01); C02F 1/22 (2023.01); C02F 101/16 (2006.01); C02F 1/20 (2023.01); C02F 1/52 (2023.01)
CPC C01C 1/26 (2013.01) [B01D 9/00 (2013.01); C02F 9/00 (2013.01); C05C 11/00 (2013.01); B01D 9/0004 (2013.01); B01D 2009/0086 (2013.01); C02F 1/02 (2013.01); C02F 1/20 (2013.01); C02F 1/22 (2013.01); C02F 1/441 (2013.01); C02F 1/444 (2013.01); C02F 1/447 (2013.01); C02F 3/28 (2013.01); C02F 2001/5218 (2013.01); C02F 2101/16 (2013.01); C02F 2103/20 (2013.01); C02F 2209/02 (2013.01); C02F 2303/24 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A process to treat waste containing ammonia nitrogen comprising:
treating waste at a temperature of at least 80 degrees Celsius to create a gas and, without the addition of chemicals that are not inherently present in the waste, converting substantially all ammonia in the waste to gaseous form in the gas, said gas also containing carbon dioxide and water vapor;
treating said gas containing gaseous ammonia, carbon dioxide and water vapor, using partial condensation, or repeated partial condensation, to concentrate the ammonia and carbon dioxide; all without the use of chemical(s) that are not inherently present in the waste, and remove from said gas a significant amount of water vapor in liquid condensate form, causing formation of a concentrated gas containing higher concentrations of ammonia gas and carbon dioxide gas than before condensation;
treating said concentrated gas using absorption or adsorption to form concentrated ammonium carbonate and ammonium bicarbonate;
crystallizing the concentrated ammonium carbonate and ammonium bicarbonate at a temperature of less than about 35 degrees Celsius to form solid ammonium bicarbonate and ammonium carbonate.