3406results about "Non-contaminated water treatment" patented technology

A thermoelectric material comprises two or more components, at least one of which is a thermoelectric material. The first component is nanostructured, for example as an electrically conducting nanostructured network, and can include nanowires, nanoparticles, or other nanostructures of the first component. The second component may comprise an electrical insulator, such as an inorganic oxide, other electrical insulator, other low thermal conductivity material, voids, air-filled gaps, and the like. Additional components may be included, for example to improve mechanical properties. Quantum size effects within the nanostructured first component can advantageously modify the thermoelectric properties of the first component. In other examples, the second component may be a thermoelectric material, and additional components may be included.

The invention relates to a rapid efficient ammonia nitrogen remover and a preparation method and application thereof. The rapid efficient ammonia nitrogen remover is prepared from the following components in percentage by mass: 5-35% of an oxidant, 5-50% of an inorganic coagulant, 2-40% of an adsorption material, 1-15% of a calcium salt and 1-20% of an effervescent disintegrant. The rapid efficient ammonia nitrogen remover can be dissolved in water, and is free of a residue, free of secondary pollution, the operation is simple and convenient, the time required for purifying the water is short, ammonia nitrogen can be quickly and efficiently removed, and the rapid efficient ammonia nitrogen remover has a certain removal effect on COD, total phosphorus and suspended matters at the same time. The rapid efficient ammonia nitrogen remover integrates oxidation, breakpoint chlorination, coagulating sedimentation, adsorption, pH value control and rapid collapse body dissolution, and the ammonia nitrogen can be quickly and efficiently removed.

Embodiments of the present invention provide systems and methods for point of use location treatment of potable water supplies on demand on board passenger vehicles, such as aircraft. The systems described generally provide increased safety features, alternate ultraviolet light sources, and reduced power consumption.

In addition to health implications, trihalomethanes (THMs) poses a challenge to the electronic industry where such impurities cannot be tolerated. A process is provided for removing THMs from high-purity water used in the electronic industry. The method of the invention comprises contacting the high-purity water with a membrane degassifier, preferably operating at a temperature exceeding 45° C.

A composition for disinfecting contaminated drinking water. The composition can include a disinfecting agent for disinfecting or sanitizing the water and a masking agent for masking or minimizing undesired characteristics of the disinfecting agent, such as taste and odor. The disinfecting agent can be a halogen-based disinfecting agent, such as a chlorine-based disinfecting agent. The masking agent can be a chlorine-compatible masking agent or flavorant, such as a citrus fruit derived flavor. The composition can also include a substrate. The substrate can be a clay, zeolite, water-soluble carrier, water-insoluble carrier, or mixtures thereof. The flavorant can be loaded onto the substrate. The composition can include other components, such as a primary coagulant, a coagulant aid, a bridging flocculant, a polymeric material, an alkali agent, an autocatalytic oxidant, and mixtures thereof.

An electrolytic cell for generating a mixed oxidant that is rich in ozone is disclosed. The cell disassociates a brine solution to generate ozone and chlorine based oxidants. The improved cell design allows the ratio of ozone to the other oxidants to be optimized, thereby providing a more efficient sterilization solution. The ozone production is adjusted by adjusting the residence time of the brine solution in the cell and the orientation of the cell.

There is provided a circulation type water purifier which maximally prevents production of bacteria and microbes by periodically circulating water in the water purifier, and improves lifetime and power saving of a pump by varying the number of circulation times depending on an amount of water used. The circulation type water purifier includes a clean water filter; a storage tank in which water purified through the clean water filter is stored; a cold/hot water supply tank cooling and heating the water supplied from the storage tank to drain the cooled and heated water to respective drain outlets; a drain pipe 351 connected to the cold/hot water supply tank to drain the water in the cold/hot water supply tank when cleansing the interior of the cold/hot water supply tank; a pump 400 periodically circulating water at every circulation time under a control of a microcomputer; a circulation pipe connecting the clean water filter, the cold/hot water supply tank, the drain pipe and the pump, the circulation pipe including a first circulation pipe connecting the clean water filter and the storage tank, a first auxiliary circulation pipe connecting the storage tank and the cold/hot water supply tank, a second circulation pipe connecting the storage tank and the clean water filter, and a second auxiliary circulation pipe connecting the cold/hot water supply tank and the second circulation pipe! and a sterilizer installed to the circulation pipe to sterilize water flowed into the circulation pipe.

Some embodiments provide a multi-stage water treatment and enrichment apparatus with an upper water reservoir, a lower water reservoir, a cartridge that is composed of a porous filter and multiple seep through chambers that treat and enrich water, a water dispensing tap valve, and a preservation cartridge. Collectively, these components function (1) to provide multiple levels of treatment including filtration and purification, (2) to provide enrichment of water via mineralization, magnetization, softening, and alkalinization, (3) to provide for customizability of the treatment and enrichment so that different consumers can adapt these processes to satisfy their own personal preferences, (4) to provide an apparatus that operates using gravitational forces and without the need for external power or pressure to perform the multi-stage treatment and enrichment of water, and (5) to provide an inexpensive apparatus that is suitable for primary usage in the home.

The invention relates to a preparation method of a super-hydrophobic polytetrafluoroethylene microporous membrane. The preparation method comprises the following steps: mixing polytetrafluoroethylene resin, an extrusion aid, a super-hydrophobic fluorine-containing material and an optional solvent to form a paste; and then, extruding the paste to prepare the super-hydrophobic polytetrafluoroethylene microporous membrane. The invention further relates to a super-hydrophobic polytetrafluoroethylene microporous membrane prepared by the preparation method, wherein the super-hydrophobic polytetrafluoroethylene microporous membrane has excellent hydrophobicity and has a water contact angle of 140 degrees. The invention further relates to an application of the super-hydrophobic polytetrafluoroethylene microporous membrane in a contactor.

Subject matter of the invention is the procedure and plant for industrial wastewater and/or drinking water treatment by means of electrochemical methods and advanced oxidation processes. The preparatory phase of gravitational sedimentation is followed by main treatment consisting of electrocoagulation, electrooxidation and electroflotation through action of metal electrode sets made of inox, steel and aluminium respectively, with parallel disinfection/oxidation with ozone, UV irradiation and ultrasonic treatment, as well as recirculation in the electromagnetic field. At the end of the main treatment, the mixture of floccule and water is subject to coagulation/flocculation by electrochemically generated steel and aluminium floccule with slow infusion of ozone. The next phase is separation of sediment from clean water which is discharged through sand and activated charcoal filters for the purpose of removal of light floating floccule in the collection tank. If required, the water is subject to oxidation with simultaneous action of UV irradiation and ozone for the purpose of final destruction of organic matter and ammonia, and potential residues of microbiological contamination.

Provided is a biocidal composition comprising glutaraldehyde and an oxazolidine biocidal compound. The composition is useful for controlling microorganisms in aqueous or water containing systems such as found in oil and natural gas production.