Abstract:
Process and apparatus to remove colloids and nitrogen compounds from contaminated water by coagulating the colloids and separating them from the water. The solids are floated by sparging and then the floating solids are swept from the surface of the water into an exit port using a conveyor from which downwardly depending flaps skim or near the surface, thus sweeping the floating floc into the exit port.
Abstract:
An electrochlorination and electrochemical system for the on-site generation and treatment of municipal water supplies and other reservoirs of water, by using a custom mixed oxidant and mixed reductant generating system for the enhanced destruction of water borne contaminants by creating custom oxidation-reduction-reactant chemistries with real time monitoring. A range of chemical precursors are provided that when acted upon in an electrochemical cell either create an enhanced oxidation, or reduction environment for the destruction or control of contaminants. Chemical agents that can be used to control standard water quality parameters such as total hardness, total alkalinity, pH, total dissolved solids, and the like are introduced via the chemical precursor injection subsystem infrequently or in real time based on sensor inputs and controller set points.
Abstract:
The process according to the invention is suitable for eliminating organic contaminations and bacterial infections in water by using only electric current without the use of external oxygen source and without adding any oxidative chemicals. According to the process when preconditioning the water contaminated with organic materials and infected with bacteria for the purpose of drinking water the water is introduced to the anode space, where the anode space and the cathode space are separated from each other by anion selective membrane, while the hydroxyl ion containing solution is circulated through the cathode space. Hydroxyl ions passing through the membrane are converted to hydroxyl radicals on the anode, which by their strong oxidative activity intensively oxidize the organic materials, resulting in the control of bacteria.
Abstract:
The invention relates, in particular, to a process for treating a liquid medium loaded with nitrates via a chemical route that mainly comprises a step of electrolysis of the liquid medium in the presence of a metal salt, the electrolysis being carried out at a pH below 5. The invention also relates to a device for treating a liquid medium loaded with nitrates and also to the applications of this process and device, in particular for reducing the level of nitrates in drainage waters.
Abstract:
A system using electrochemically-activated water (ECAW) for manufacturing, processing, packaging, and dispensing beverages including: (a) using ECAW to neutralize incompatible residues when transitioning from the production of one beverage to another; (b) using ECAW to rehabilitate and disinfect granular activated charcoal beds used in the feed water purification system; (c) producing a carbonated ECAW product and using the carbonated ECAW for system cleaning or disinfecting; (d) using ECAW solutions in the beverage facility clean-in-place system to achieve improved microbial control while greatly reducing water usage and reducing or eliminating the use of chemical detergents and disinfectants; (e) further reducing biofilm growth in the processing system, and purifying ingredient water without the use of chlorine, by adding an ECAW anolyte to the water ingredient feed stream; and/or (f) washing the beverage product bottles or other packages with one or more ECAW solutions prior to packaging.
Abstract:
The current disclosure relates to a feed solution for an electrochemical generator, the feed solution comprising at least one of a chlorite solution and/or a chlorate solution, wherein hardness-causing ion concentration in at least one of the chlorite solution and/or the chlorate solution is reduced to less than 1 part per million using at least one of an ion exchange method and/or a precipitation method. The current disclosure additionally relates to an electrochemical chlorine dioxide generator wherein the reactant feedstock is an electrolyte solution passed through an ion exchange column, the ion exchange column capable of substantially removing hardness-causing ions in the electrolyte solution. The current disclosure further relates to a method for assessing acceptable concentrations of hardness-causing impurities in an electrolyte solution. Additionally, the current disclosure relates to methods for reducing impurities in a sodium chlorite reactant feedstock.
Abstract:
A method and apparatus are provided for the electrochemical treatment of an aqueous solution in an electrolytic cell. Output solution having a predetermined level of available free chlorine is produced by applying a substantially constant current across the cell between an anode and a cathode while passing a substantially constant throughput of chloride ions through the cell.
Abstract:
A method and apparatus for the electrochemical treatment of an aqueous solution in an electrolytic cell is described. Output solution having a predetermined level of available free chlorine is produced by applying a substantially constant current across the cell between an anode and a cathode while passing a substantially constant throughput of chloride ions through the cell.
Abstract:
This invention relates to an apparatus and method for producing an output solution having a predetermined level of available free chlorine including two or more parallel production lines. Each production line includes an electrolytic cell, means for passing a saline solution having a substantially constant chloride ion concentration through the cell, means for applying a substantially constant current across the cell, and means for dispensing output solution from the cell.
Abstract:
The present invention provides a biocidal solution having a pH of from 5 to 7 and an available free chlorine content of from 500 to 1000 ppm when produced by an electrolytic cell. Also provided is a method of producing a biocidal solution in an electrolytic cell, the method including supplying to the cell a solution with a sat concentration of 2.0 to 5.0 g/L such that the solution passes through an anode chamber at a flow rate per anode surface area of 1.25×103 to 2.75×103 L hr′m-z and applying current to the cell sufficient to produce a biocidal solution with an available free chlorine content of 500 to 1000 ppm and a pH of from 5 to 7.
Abstract translation:本发明提供一种pH为5〜7的杀生物溶液,当由电解槽生产时,其游离氯含量为500〜1000ppm。 还提供了一种在电解池中生产杀生物溶液的方法,该方法包括向槽内供给饱和浓度为2.0至5.0g / L的溶液,使溶液以每个阳极的流速通过阳极室 表面积为1.25×10 3至2.75×10 3 L hr'm-z,并向电池施加电流,足以产生具有500至1000ppm可用游离氯含量和5至7的pH的杀生物溶液。