EP 3898515 A1 20211027 - PROCESS TO RECOVER AMMONIUM BICARBONATE FROM WASTEWATER
Title (en)
PROCESS TO RECOVER AMMONIUM BICARBONATE FROM WASTEWATER
Title (de)
VERFAHREN ZUR RÜCKGEWINNUNG VON AMMONIUMBICARBONAT AUS ABWASSER
Title (fr)
PROCÉDÉ DE RÉCUPÉRATION DE BICARBONATE D'AMMONIUM À PARTIR D'EAUX USÉES
Publication
Application
Priority
US 2018067247 W 20181221
Abstract (en)
[origin: WO2020131116A1] The present invention is a process, a method, and system for recovery and concentration of dissolved ammonium bicarbonate from a wastewater containing ammonia (NH3) using gas separation, condensation, and crystallization, each at controlled operating temperatures. The present invention includes 1) removal of ammonia from waste (sludges, semi-solids, and solids and liquids) without the use of chemicals at a temperature of at least 80 degrees Celsius, 2) condensing the gaseous containing ammonia, carbon dioxide and water vapor to remove water vapor concentrating the amount of gaseous ammonia and carbon dioxide, 3) concentrating the ammonia and carbon dioxide in the water by established means, such as concentrating the gas using partial condensation followed by passing the concentrated gas through an absorption column at a temperature of between about 20 and 50 degrees Celsius to form dissolved ammonium carbonate and ammonium bicarbonate, or total condensation followed by dewatering using reverse osmosis, and 4) crystallizing concentrated dissolved ammonium carbonate and ammonium bicarbonate at a temperature of less than about 35 degrees Celsius to form solid ammonium bicarbonate and ammonium carbonate.
IPC 8 full level
C01C 1/26 (2006.01); C02F 1/44 (2006.01); C02F 3/28 (2006.01); C02F 9/00 (2006.01)
CPC (source: EP)
B01D 5/0066 (2013.01); C01C 1/26 (2013.01); C02F 9/00 (2013.01); C05C 3/00 (2013.01); C05F 3/00 (2013.01); C05F 17/15 (2020.01); C05F 17/50 (2020.01); C02F 1/048 (2013.01); C02F 1/20 (2013.01); C02F 1/441 (2013.01); C02F 1/444 (2013.01); C02F 1/447 (2013.01); C02F 11/04 (2013.01); C02F 2001/5218 (2013.01); C02F 2101/16 (2013.01); C02F 2103/20 (2013.01); Y02A 40/20 (2017.12); Y02E 50/30 (2013.01); Y02P 20/145 (2015.11); Y02W 30/40 (2015.05)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2020131116 A1 20200625; CA 3123802 A1 20200625; EP 3898515 A1 20211027; EP 3898515 A4 20220803; MX 2021007358 A 20210921
DOCDB simple family (application)
US 2018067247 W 20181221; CA 3123802 A 20181221; EP 18943551 A 20181221; MX 2021007358 A 20181221