A system for generating a concentrated product from a feedstock includes a reciprocating concentration system that includes first and second chambers to which the feedstock is alternately provided and from which the concentrated product is alternately removed, and a heat transfer system in thermal communication with the first and second chambers, the heat transfer system being configured to reversibly transfer heat between the first and second chambers such that the first chamber alternates between melting a frozen portion of the feedstock in the second chamber and having a frozen portion of the feedstock in the first chamber melted by the feedstock in the second chamber. The system further includes a heat dump system in thermal communication with the reciprocating concentration system, the heat dump system being configured to remove heat from the reciprocating concentration system.

A system for removing ammonia from an ammonia-containing liquid, comprising a heat exchanger, an ammonia stripper and an acid scrubber, wherein the ammonia stripper comprises at least two stripper units, which are in fluid communication with one another through a series connection, forming a fluid flow path from the ammonia-containing liquid inlet through the at least two stripper units to the liquid discharge outlet, and wherein the acid scrubber comprising at least two scrubber units, which are in gas communication with one another and the at least two stripper units through a series connection, forming a gas flow path from the air inlet through the at least two stripper units and scrubber units to the scrubber air outlet which is opposite to the fluid flow path through the striper units.

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, filtration, 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) mixing of the gaseous ammonia with carbon dioxide and water vapor and concentrating dissolved ammonium carbonate and ammonium bicarbonate using reverse osmosis at a temperature of between about 35 and 50 degrees Celsius, and 3) 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.

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, filtration, 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) mixing of the gaseous ammonia with carbon dioxide and water vapor and concentrating dissolved ammonium carbonate and ammonium bicarbonate using reverse osmosis at a temperature of between about 35 and 50 degrees Celsius, and 3) 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.

A method of treating an ammonia-containing purge gas stream on a vessel is described, the method comprising at least the steps of: (a) providing the ammonia-containing purge gas stream from a vessel engine; and (b) passing the ammonia-containing purge gas stream through a first tank containing water to provide a reduced-ammonia vent gas stream.

A system for generating a concentrated product from a feedstock includes a reciprocating concentration system that includes first and second chambers to which the feedstock is alternately provided and from which the concentrated product is alternately removed, and a heat transfer system in thermal communication with the first and second chambers, the heat transfer system being configured to reversibly transfer heat between the first and second chambers such that the first chamber alternates between melting a frozen portion of the feedstock in the second chamber and having a frozen portion of the feedstock in the first chamber melted by the feedstock in the second chamber. The system further includes a heat dump system in thermal communication with the reciprocating concentration system, the heat dump system being configured to remove heat from the reciprocating concentration system.

A system for generating a concentrated product from a feedstock includes a reciprocating concentration system that includes first and second chambers to which the feedstock is alternately provided and from which the concentrated product is alternately removed, and a heat transfer system in thermal communication with the first and second chambers, the heat transfer system being configured to reversibly transfer heat between the first and second chambers such that the first chamber alternates between melting a frozen portion of the feedstock in the second chamber and having a frozen portion of the feedstock in the first chamber melted by the feedstock in the second chamber. The system further includes a heat dump system in thermal communication with the reciprocating concentration system, the heat dump system being configured to remove heat from the reciprocating concentration system.

An ammonia-containing liquid or an ammonia-containing gas is made to contact a porous coordination polymer in which a metal ion and an organic ligand coordinately bonded, ammonia is adsorbed to the porous coordination polymer, and the ammonia is desorbed from the ammonia-adsorbed porous coordination polymer to recover the ammonia. The porous coordination polymer that contacts the ammonia-containing liquid preferably has a water-soluble solvent adhered thereto. The ammonia-containing gas is preferably adjusted such that water is contained at an amount of 106 parts by mass or more when the ammonia content is 100 parts by mass.

An ammonia-containing liquid or an ammonia-containing gas is made to contact a porous coordination polymer in which a metal ion and an organic ligand coordinately bonded, ammonia is adsorbed to the porous coordination polymer, and the ammonia is desorbed from the ammonia-adsorbed porous coordination polymer to recover the ammonia. The porous coordination polymer that contacts the ammonia-containing liquid preferably has a water-soluble solvent adhered thereto. The ammonia-containing gas is preferably adjusted such that water is contained at an amount of 106 parts by mass or more when the ammonia content is 100 parts by mass.

A system for recovering ammonia from an ammonia-containing liquid, which system comprises a waste tank (10) for receiving ammonia-containing liquid entering the system; a filtration unit (14) comprising an ultrafiltration unit for receiving the ammonia-containing liquid from the waste tank (10) and filtering the ammonia-containing liquid to remove solids; an ammonia concentrating unit comprising a reverse osmosis unit (18) for receiving ammonia-containing liquid from the filtration unit (14) and concentrating the ammonia within the liquid; and an ammonia-recovery unit (100) for receiving concentrated ammonia-containing liquid from the ammonia concentrating unit (18) and recovering ammonia therefrom, wherein the ammonia-recovery unit (100) comprises a rectifier (102) for separating ammonia from the concentrated ammonia-containing liquid and recovering the ammonia as ammonia-containing gas; and wherein the system does not comprise an ammonia stripper.