The present invention describes methods for absorbing a targeted chemical compound from a gas stream into a scrubbing solution for various uses and with various benefits. Methods are described to produce a gas stream that can be further processed with operational benefits, such as through condensing and wastewater treatment with a lower load on the wastewater treatment system. Methods are described for adsorbing the targeted compound with reduced condensation of water from the gas stream. Methods are described for producing a liquid stream comprising an absorbed form of the targeted compound for use as a saleable product, such as adsorbing ammonia for the production of a fertilizer, wherein the concentration of the absorbed form may be increased through reduced condensation from the gas stream. Methods are described for producing a lower volume liquid waste stream from the absorption process through the use of reduced condensation of the gas stream.

The present invention describes methods for absorbing a targeted chemical compound from a gas stream into a scrubbing solution for various uses and with various benefits. Methods are described to produce a gas stream that can be further processed with operational benefits, such as through condensing and wastewater treatment with a lower load on the wastewater treatment system. Methods are described for adsorbing the targeted compound with reduced condensation of water from the gas stream. Methods are described for producing a liquid stream comprising an absorbed form of the targeted compound for use as a saleable product, such as adsorbing ammonia for the production of a fertilizer, wherein the concentration of the absorbed form may be increased through reduced condensation from the gas stream. Methods are described for producing a lower volume liquid waste stream from the absorption process through the use of reduced condensation of the gas stream.

A methane oxidation device for recovering heat for re-use in oxidation, the methane oxidation device comprising; a methane oxidation unit for oxidising methane; and a heat exchanger for recovering heat for re-use in oxidation; wherein the heat exchanger comprises; an inlet arranged, in use, in fluid communication with a source of methane emissions; an outlet; at least one flow path, the at least one flow path fluidly connecting the inlet to the outlet, the at least one flow path having at least a portion passing though the methane oxidation unit; and at least one counter flow path, wherein the counter flow path is the counter of the flow path, the at least one counter flow path having at least a portion passing though the methane oxidation unit; in use, the at least one flow path and counter flow path are arranged to permit heat transfer therebetween.

The invention relates to an exhaust system for the treatment of an exhaust gas comprising ammonia in an amount of up to 250 ppm, the system comprising: an exhaust gas inlet; an ammonia storage material arranged to receive an exhaust gas from the exhaust gas inlet; an ammonia oxidation catalyst arranged downstream of a selected portion of the ammonia storage material; and a heating device for heating gas before it passes through the selected portion of the ammonia storage material to release ammonia stored therein for treatment on the ammonia oxidation catalyst, wherein the system is configured so that the selected portion of the ammonia storage material changes over time. The invention further relates to a livestock house comprising the exhaust system and a method of treating an ammonia-containing gas.

An exhaust system for the treatment of an exhaust gas comprising a species to be treated, the system comprising: a first gas inlet for providing a flow of exhaust gas; a second gas inlet for providing a flow of heated gas; a plurality of sorbent beds for releasably storing the species; one or more catalysts for decomposing the species; first and second exhaust gas outlets; and a valve system configured to establish independently for each sorbent bed fluid communication in a first or second configuration, wherein: i) in the first configuration the flow of the exhaust gas from the first gas inlet contacts a sorbent bed for storing the species and then passes to the first gas outlet; and ii) in the second configuration the flow of heated gas from the second gas inlet contacts a sorbent bed for releasing the species, passes to one of the one or more catalysts and then passes to the second exhaust gas outlet; wherein the valve system is configured to ensure that at least one sorbent bed is in the first configuration and, preferably at least one other sorbent bed is in the second configuration.

A washing treatment system includes an odor and flue gas washing tower, a biological deodorization filtering tower, a multifunctional biomass combustion boiler, a liquid fermentation reactor, a solid fermentation reactor, circulating pumps, an exhaust fan and an induced draft fan. An exhaust port is formed in a top end cover of the odor and flue gas washing tower. A liquid inlet, an air inlet and a liquid drainage port are formed in a side wall of a tank body. A hanging basket is placed in the tank body. Organic fillers and/or inorganic fillers are placed in the hanging basket. An inner cavity of the washing tower is divided into a liquid inlet shunting cavity, a filler layer, an air cavity and a liquid accumulation cavity from top to bottom. An upper supernatant in the liquid fermentation reactor is connected with the liquid inlet for washing.

Systems and methods of producing a concentrated solution from a gas stream are disclosed. The method of producing a concentrate solution includes introducing the gas stream having the contaminant into an absorption chamber, introducing a dilute liquid having the contaminant into the absorption chamber, at least one of the gas stream and the dilute liquid being at an elevated temperature, and contacting the gas stream with the dilute solution to produce a liquid-enriched gas stream and a concentrate solution. The systems for producing a concentrated solution include a source of a gas stream having a contaminant, a source of a dilute solution having the contaminant, and an absorption chamber fluidly connected to the source of the gas stream and the source of the dilute solution. The source of the dilute solution can have a subsystem for removing contaminants from the gas stream, constructed and arranged to receive the gas stream or a liquid-enriched gas and produce the dilute solution.

The present disclosure relates to a method for removing ammonia from exhaust air from a livestock stable and a device for removing ammonia from exhaust air from a livestock stable. The method and the device of the disclosure allow to a achieve a complete or near complete removal of ammonia from exhaust air. Moreover, the method and device of the disclosure allow full nitrification to nitrate, thus obviating the problem of toxic nitrite in the waste water after scrubbing the exhaust air.

Systems and methods of producing a concentrated solution from a gas stream are disclosed. The method of producing a concentrate solution includes introducing the gas stream having the contaminant into an absorption chamber, introducing a dilute liquid having the contaminant into the absorption chamber, at least one of the gas stream and the dilute liquid being at an elevated temperature, and contacting the gas stream with the dilute solution to produce a liquid-enriched gas stream and a concentrate solution. The systems for producing a concentrated solution include a source of a gas stream having a contaminant, a source of a dilute solution having the contaminant, and an absorption chamber fluidly connected to the source of the gas stream and the source of the dilute solution. The source of the dilute solution can have a subsystem for removing contaminants from the gas stream, constructed and arranged to receive the gas stream or a liquid-enriched gas and produce the dilute solution.

The present invention is directed to a process for removing gas phase nitrogen-based compounds by absorption into a liquid stream. The absorbed nitrogen-based compound is reacted with an acid to produce a nitrogen-based product. The nitrogen-based compound, the acid, and the resulting nitrogen-based product may be organic compounds, i.e. compounds derived from animal matter or plant matter and the nitrogen-based product may be a fertilizer that may be used in organic agriculture or the production of certified organic foods. Processes are also described for removing nitrogen-based compounds from a liquid stream to produce a nitrogen-based product, including organic fertilizers. One process includes producing cavitation bubbles into which a liquid phase nitrogen-based compound is stripped, followed by absorption to produce a nitrogen-based product. Another process includes the use of a degassing membrane to remove a liquid phase nitrogen-based compound that is degassed to produce a nitrogen-based product, including organic fertilizers.