An electrochemical system and method are disclosed for On Site Generation (OSG) of oxidants, such as free available chlorine, mixed oxidants and persulfate. Operation at high current density, using at least a diamond anode, provides for higher current efficiency, extended lifetime operation, and improved cost efficiency. High current density operation, in either a single pass or recycle mode, provides for rapid generation of oxidants, with high current efficiency, which potentially allows for more compact systems. Beneficially, operation in reverse polarity for a short cleaning cycle manages scaling, provides for improved efficiency and electrode lifetime and allows for use of impure feedstocks without requiring water softeners. Systems have application for generation of chlorine or other oxidants, including mixed oxidants providing high disinfection rate per unit of oxidant, e.g. for water treatment to remove microorganisms or for degradation of organics in industrial waste water.

A method for controlling power supplied to an ozone water generator is disclosed. The ozone water generator includes an electrolytic plate unit. The electrolytic plate unit includes an anode plate assembly composed of a plurality of anode plates, a first cathode plate assembly composed of a plurality of first cathode plates, and a second cathode plate assembly composed of a plurality of second cathode plates. In the process of electrolyzing water, the two cathode plate assemblies alternately obtain a relatively high-level signal at a short time, and the two cathode plate assemblies obtain a relatively low-level signal at other times. During the use of the ozone water generator, the scale formed on the surface of the cathode plate assembly can be removed in time, so as to ensure the electrolysis performance of the ozone water generator, without descaling by chemicals. No maintenance is required.

A method for electrochemical treatment of water is provided. The method includes providing a flow-through reactor including a cathode and an anode, wherein the anode includes about 80 weight percent or greater of a sub-stoichiometric titanium oxide. The method further includes applying power to the cathode and the anode, passing a solution including water and a metal chloride through the flow-through reactor, and withdrawing the purified water.

A system and method for applying an advanced oxidation process to a UV fluid reactor. An L-shaped electrode is connected to a UV reactor hatch and inserted into the reactor upstream from a UV radiation source.

An electrolytic liquid generation device according to the present disclosure includes an electrolytic part and a housing in which the electrolytic part is disposed. The electrolytic part has a laminate including mutually adjacent electrodes and a conductive film interposed between the electrodes. The electrolytic part electrolyzes a liquid. The housing includes an electrode case having a recess with an opening to enable insertion of the electrolytic part through the opening and to contain the electrolytic part in the recess, and an electrode case lid to cover the opening of the electrode case. The electrolytic part is contained in the recess such that lamination direction Z of the laminate is substantially aligned with a direction in which the opening opens. This configuration provides an electrolytic liquid generation device that can be built with improved facility.

Various embodiments disclosed relate to methods of separating impurities from industrial minerals using electrocoagulation and apparatuses for performing the same. In one embodiment, the present invention provides a method of purifying an industrial mineral composition. The method can include obtaining or providing an aqueous slurry comprising a mineral composition comprising one or more industrial minerals and one or more impurities. The method can include subjecting the aqueous slurry to an electrical current to form at least one coagulation comprising the one or more impurities. The method can include separating at least one of the coagulations from the one or more minerals, providing a purified mineral composition.

An electrochemical cell for wastewater treatment is disclosed comprising a catalyst coated membrane, an open pore mesh placed next to the catalyst coated membrane, on each side of the membrane, and a compression frame placed next to each of the open pore meshes. The open pore meshes and the compression frames are made of a conductive material. Each compression frame has compression arms spread within the area delimited by the perimeter of the frame to apply a uniform compression force across the anode and cathode active areas through fasteners which protrude through the compression arms, the open pore meshes and the catalyst coated membrane. A stack comprising at least one such electrochemical cell is immersed in a reactor tank containing the wastewater to be treated.

An apparatus for producing reducing water that maintains a neutral range of pH and exhibits superior reducing force. The apparatus for producing reducing water includes an electrolytic bath including a cathode chamber provided with a cathode, an anode chamber provided with an anode, and an intermediate chamber interposed between the cathode chamber and the anode chamber, wherein the cathode chamber and the intermediate chamber are provided with an inlet through which water is supplied, and an outlet through which water is discharged, a cation exchange membrane is provided between the cathode chamber and the intermediate chamber, and the intermediate chamber includes a cation exchange resin that dissociates hydrogen ions when the cation exchange resin reacts with water.

The present invention provides electrodes for transferring a charge comprising a plurality of members for making electrical contact. The electrodes are suitable for treating aqueous, substantially aqueous and nonaqueous fluids including wastewater, solvents and gases. Water maybe treated using the electrodes to provide higher dissolved oxygen or lower levels of contaminants after treatment. Furthermore, the electrodes may be useful in precipitation reactions such as electrowinning methods. The electrodes may also be capable of altering biological characteristics of organisms such as algae and bacteria.

An electrochemical system and method are disclosed for On Site Generation (OSG) of oxidants, such as free available chlorine, mixed oxidants and persulfate. Operation at high current density, using at least a diamond anode, provides for higher current efficiency, extended lifetime operation, and improved cost efficiency. High current density operation, in either a single pass or recycle mode, provides for rapid generation of oxidants, with high current efficiency, which potentially allows for more compact systems. Beneficially, operation in reverse polarity for a short cleaning cycle manages scaling, provides for improved efficiency and electrode lifetime and allows for use of impure feedstocks without requiring water softeners. Systems have application for generation of chlorine or other oxidants, including mixed oxidants providing high disinfection rate per unit of oxidant, e.g. for water treatment to remove microorganisms or for degradation of organics in industrial waste water.