A flue gas cleaning solution purification system includes: a scrubber for removing contaminants from flue gas by using a cleaning solution; a cleaning solution purification unit for purifying the contaminated cleaning solution discharged from the scrubber; a cleaning solution resupply unit for resupplying the cleaning solution having been purified by the cleaning solution purification unit to the scrubber; and a sludge treatment unit for treating and storing sludge discharged from the cleaning solution purification unit, wherein the cleaning solution purification unit includes: a circulation buffer tank for temporarily storing the discharged contaminated cleaning solution; a coagulant supply apparatus for supplying a coagulant which coagulates contaminants of the contaminated cleaning solution discharged from the scrubber; a settling apparatus for primarily purifying the contaminated cleaning solution discharged from the scrubber by enabling settling of the contaminants; and a filtering apparatus for secondarily purifying the cleaning solution by filtering the contaminated cleaning solution to remove the contaminants.

Disclosed are systems and methods of managing grey water or other recycled water onboard an aircraft based on demand within the aircraft. In some cases, the grey water is obtained from a lavatory or galley sink of the aircraft and is treated to purify and/or filter the grey water. The treated grey water can be routed within the aircraft according to a control scheme that accounts for demand within the aircraft. For example, some or all of the treated water may undergo electrolysis to produce oxygen gas (O2) and hydrogen gas (H2), some or all of which may be fed into the fuel cell system and used in a chemical reaction to produce electrical energy and other fuel cell by-products that can be directed to various aircraft systems and/or the aircraft cabin/lavatories.

The invention presents a urea bio-electrochemical (UBE) system to achieve resource recovery from water recycling systems. A GAC-urease bioreactor was used to recover urea from wastewater stream, and converted to ammonia. Then, the ammonia produced was used to feed an electrochemical cell to gather electrical energy. The invention shows the feasibility of using the UBE system in combination with a forward osmosis subsystem for water reclamation.

A system for treating emissions from a vehicle includes an ozone generator, a first holding tank, and an exhaust vent. The first holding tank is downstream from the ozone generator and defines a volume for liquid waste beneath a void space. The exhaust vent is downstream from the first holding tank and outside of the vehicle. A supply conduit connects the ozone generator to the void space of the first holding tank. An exhaust conduit connects the void space of the first holding tank to the exhaust vent. The ozone generator, supply conduit, void space of the first holding tank, exhaust conduit, and exhaust vent establish a thermal driving head from the ozone generator through the void space of the first holding tank to the exhaust vent.

A water-harvesting system can operate with a material that can take up and release water with minimum energy requirements and powered by low-grade energy sources, such as sunlight, in order to potentially allow its deployment into households, especially those located in sunny regions. A water-harvesting method and system can include vapor adsorption using a porous metal-organic framework. In certain embodiments, the porous metal-organic framework can include metal-organic framework in ambient air with low relative humidity, typical of the levels found in most dry regions of the world.

A compact, portable system and process separates dissolved and suspended solids from water containing high levels of those solids. Gas flotation is used with and oxidant as an initial stage. The resulting foam is dewatered in a fluid conveyance, with the gas being recycled to the flotation column, the foam sent to a holding tank and the water passed through one of a number of filtration vessels having granular filter media. As at least one filtration vessel is kept in operation filtering, another filtration vessel can be backwashed when the flow therethrough is diminished of the fluid level inside rises. Treated water is used for backwashing and provided to a collection conduit.

This invention relates in general to a system for treating hard water encountered in aircraft potable water equipment; such as hot water heaters and, more particularly, to the prevention of scale deposits in aircraft lavatory and galley heated water system components by installing a unique scale reduction system. The scale reduction system generally comprised of a housing with a modular cartridge inserted therein. The cartridge is porous and contains a chemical composition within its inner cavity, and this chemical composition is mixed with untreated inlet fluid flow so that the outlet flow is of a sufficiently diluted concentration. Various chemical compositions may be utilized to counteract any number of conditions that affect potable water equipment and, in one embodiment, a water softening agent is utilized to combat scale build-up in aircraft plumbing.

A ballast water treatment device includes an oxidant supply amount control device in which a storage unit stores a relationship between an absorbance of a raw water for a ballast and a dissolved organic carbon concentration thereof and another relationship between the dissolved concentration and a residual oxidant concentration required after a predetermined time from an oxidant supply, to kill organisms and to suppress their regrowth in the ballast. A calculation unit derives the required residual oxidant concentration corresponding to the absorbance measured by a meter by referring to the relationships and calculates a target oxidant supply amount using the required residual oxidant concentration. For the target, a control unit controls an oxidant supply device.

A water purification system comprises a bioreaction subsystem receiving contaminated input effluent and having a gas-lift anaerobic membrane bioreactor removing urea and organic matter to create a first effluent. A light-treatment subsystem receives the first effluent and exposes the first effluent to UV light to create a second effluent free from microorganisms. A reactor subsystem fluidically connects an ammonia-reducing reactor to the UV output and receives UV-treated second effluent and has a struvite regenerator connected to the ammonia-reducing reactor output, separating ammonia from the second effluent in the ammonia-reducing reactor, and outputting the ammonia. A separation subsystem fluidically connects to the reactor output and receives the second effluent substantially free from ammonia and has a continuous electro-deionization device separating brine/salts from the second effluent to produce potable water. A closed-loop includes an ammonia-converting subsystem and a sequential fertilizer producer.

An inside-out liquid purification system includes a housing and a cartridge. The housing defines an interior space and includes an inlet at a top side of the housing, a fitting at the top side of the housing and inboard of the inlet, and an outlet at a bottom side of the housing. The cartridge is disposed within the interior space and includes a top cap having an orifice and configured to interlock with the fitting to suspend the cartridge within the interior space, a bottom cap adjacent to and suspended above the bottom side, and a filter having an annular shape and extending between the top cap and the bottom cap with the filter defining a hollow vertical column aligned with the orifice such that liquid enters the cartridge vertically through the orifice and exits the cartridge at least partially radially through the filter.