A water replicating system comprises a water analyzer for analyzing a target water to determine relative content of selected components. The system further comprises a water treatment apparatus for receiving source water, the water treatment apparatus having a first treatment portion for removing or reducing the relative content of selected components and a second treatment portion for adding components so that the source water will substantially replicate the target water.

The present invention relates to a filter element for disinfecting, cleaning and purifying household water, by removing pollutants such as heavy metals, bacteria, VOCs, and even radioactive substance. The present filter element comprises activated carbon, ion exchange resins (cationic and anionic), biopolymer and transitional metal oxide. Said biopolymer and transitional metal oxide are both in particle form and said transitional metal oxide particle can be either incorporated into the biopolymer particle or directly incorporated into the present filter element as individual particle. Maximum capacity of the present filter element can reach up to 150 L of household water. Some of the pollutants can be removed by up to 99% by the present filter element. A method of preparing the present filter element is also disclosed herein.

The present invention entails a method of treating an ion exchange regenerant stream containing selenate and removing the selenate from the regenerant stream through an oxidation-reduction process where selenate is reduced to selenite and the selenite is adsorbed onto an adsorbent which, in one embodiment, comprises iron oxide or iron oxyhydroxide. In particular, the method includes catalytically reducing the selenate to selenite in a selenate reduction reactor by reacting iron powder with the selenate in the presence of a nickel powder, which functions as a catalyst, to form selenite which is then adsorbed onto the iron oxide or iron oxyhydroxide.

The present invention is an ammonia sequestering system including a system controller connected to a plurality of flow control valves, a feed stream extending through a system inlet, and a system outlet. The feed stream is a liquid contaminated with ammonia. At least one exchange column is located between the system inlet and the system outlet. The ion column includes an ion exchange material, a column inlet connected to one of the flow control valves, and a column outlet connected to another of the flow control valves. The system also includes a regenerant stream of an aqueous solution of sodium cations, as well as an ammonia brine stream made up of the regenerant stream and ammonia.

The present invention relates to a water softening device including: a resin chamber which has an ion exchange resin and softens hard water passing through the ion exchange resin; and electrodes which are arranged by placing the resin chamber therebetween and apply voltages to the resin chamber so as to soften the hard water, and which regenerates the ion exchange resin, wherein the ion exchange resin is a slightly acidic cation exchange resin and/or a weakly alkaline anion exchange resin. The present invention provides the water softening device capable of easily regenerating the ion exchange resin and repeating the softening-regenerating without using chemicals or the like while maintaining the performance of softening water, thereby enabling a continuous use thereof.

A water purification system comprising a salvage pump, a vacuum assembly, and a clean water assembly. The salvage pump is configured to draw water from a water source. The vacuum assembly is configured to remove solutes from the water via vacuum evaporation. The clean water assembly is configured to remove non-soluble particles and/or bacteria from the water.

Provided are a method and an apparatus for producing pure water in which water that has been subjected to an ultraviolet oxidation treatment performed with an ultraviolet oxidation device is brought into contact with a platinum-group metal catalyst, the method and apparatus eliminating the likelihood of the catalyst being degraded and enabling decomposition of hydrogen peroxide to be performed for a prolonged period of time in a consistent manner. Water-to-be-treated is subjected to an ultraviolet oxidation treatment performed with an ultraviolet oxidation device and subsequently subjected to a hydrogen peroxide removal treatment performed with a hydrogen peroxide removal device including a platinum-group metal catalyst. The TOC concentration in water fed to the ultraviolet oxidation device is 5 ppb or less. An anion exchange resin tower is installed in a stage following the ultraviolet oxidation device.

A high salinity water purification system and process, including a forward osmosis system and a reverse osmosis or nanofiltration system. A concentrated brine of a zinc or iron complex combined with a salt or acid draws pure water across the FO membrane from the influent water. The diluted brine is pumped through a vessel holding an anionic adsorption media to remove the zinc or iron complex and the resultant brine is passed through the RO or nanofiltration system to obtain purified water and a concentrated brine stream. The adsorption media is regenerated by a rinse cycle using fresh water or water from the RO system, removing the zinc or iron complex adhered to the media. The resultant brine is stored and mixed with the output of the RO system.

Methods and materials are described for the removal of iodate from aqueous solutions. The methods comprise reduction of the iodate to iodide and subsequent or concurrent removal of the iodide by sorption, ion exchange, or precipitation. These methods are effective for the removal of radioactive iodine from radioactive and nuclear wastes.

A cartridge for use in a water purification apparatus and a water purification method for maintaining a water quality supply are provided. The cartridge comprises an elongated tubular body having first and second ends comprising a fluid inlet and a fluid outlet, and an internal chamber extending between the first and second end. The first end includes an end cap having a first opening in fluid communication with the body. A disinfectant material is disposed in the internal chamber of the body. Filters are disposed in the elongated tubular body adjacent to the first opening and adjacent the second end of the elongated tubular body and are in fluid communication with the internal chamber and the fluid outlet. The second end of the elongated tubular body comprising an exterior surface having a tapered portion and a linear portion adjacent to the tapered portion.