Methods of producing a treated gas by removing nitrogenous compounds are disclosed. Methods of recovering nitrogenous compounds from a gas stream are disclosed. Methods of producing a fertilizer product from organic waste are disclosed. The methods may include introducing a gas stream having nitrogenous compounds into a nitrogenous liquid containing a salt of ammonia to absorb the nitrogenous compounds in the liquid and produce a treated gas. The methods may also include controlling the pH of certain solutions or introducing an oxidant into certain solutions to produce nitrogen ions. Systems for removing nitrogenous compounds including a reaction subsystem, an oxidation control subsystem, a dissolved solids concentrator, and a recirculation line are also disclosed. The systems may be employed to remove nitrogenous compounds from a gas stream, recover the nitrogenous compounds from the gas stream, or produce a fertilizer product from the recovered nitrogenous compounds.

Described herein are methods and systems for processing gas streams. The gas streams may comprise a methane-containing gas stream, such as an exhaust stream. The systems and methods of the present disclosure may process the methane-containing gas stream using one or more processing units including a biological filtration unit and a thermal oxidizer to generate an output stream which has a lower concentration of methane than the methane-containing gas stream.

The present invention relates to a carbon dioxide conversion process and, more particularly, to a continuous carbon dioxide conversion process and a system therefor.

Disclosed herein are compositions and methods for making and using improved carbonic anhydrases for novel, sustainable, and low energy CO.sub.2 waste gas scrubbing technologies that are also transformational carbon capture technologies. Embodiments of methods, systems and compositions disclosed herein include, but are not limited to, non-aqueous solvents, advanced membranes, sorbents, and cryogenic systems that significantly reduce the cost of CO.sub.2 capture from coal and natural gas-fired power plants and industrial facilities. Methods disclosed herein reduce the energy and cost required for CO.sub.2 separation and can be applied for both pre-combustion and post-combustion CO.sub.2 capture.

Methods and systems for capturing and storing carbon dioxide are disclosed. In some embodiments, the methods include the following: mixing materials including magnesium or calcium with one or more acids and chelating agents to form a magnesium or calcium-rich solvent; using the organic acids derived from biogenic wastes as acids or chelating agents; generating carbonate ions by reacting a gas including carbon dioxide with a carbonic anhydrase biocatalyst; reacting the solvent with the carbonate ions to form magnesium or calcium carbonates; recycling a solution containing the biocatalyst after forming magnesium or calcium carbonates for re-use in the generating step; using the magnesium and calcium carbonates as carbon neutral filler materials and using the silica product as green filler materials or inexpensive absorbents.

Autonomous localized permeability material systems are provided that can include: a dynamically permeable porous material; and immobilized reagents operatively associated with the porous material in sufficient proximity to trigger a localized change in material pore size upon reagent reaction. Methods for preparing these materials are also provided as well as methods for autonomously modifying localized permeability of material.

The present invention relates to polypeptides having carbonic anhydrase activity and polynucleotides encoding the polypeptides. The invention also relates to nucleic acid constructs, vectors, and host cells comprising the polynucleotides as well as methods of producing and using the polypeptides.

Provided are an exhaust gas decomposition system, a complex exhaust gas decomposition system, and a method of decomposing an exhaust gas, wherein the exhaust gas decomposition system includes at least one of a bioreactor system that includes at least one of a bioreactor vessel; at least one of a first inlet supplying a first fluid into an interior of the vessel; at least one of a first outlet discharging the first fluid to an exterior of the vessel; at least one of a second inlet supplying a second fluid into the interior of the vessel; at least one of a second outlet discharging the second fluid to the exterior of the vessel; and at least one of a sparger located in the interior of the vessel and connected to the second inlet

Compositions for removing air pollutants from the air are provided. These compositions can be sprayed on a variety of surfaces to remove air pollutants such as volatile organic compounds (VOCs) from the environment, and are suitable for use in human dwellings.

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.