摘要:
PROBLEM TO BE SOLVED: To use COin an electrochemical system in a preferred mode.SOLUTION: In a low-voltage, low-energy electrochemical system and method, protons are removed, and/or a base solution containing hydroxide ions and carbonate/bicarbonate ions is produced, and carbon dioxide is used in a cathode chamber that is divided into a first cathode electrolyte compartment and a second cathode electrolyte compartment so as to permit a fluid flow but to limit gas communication between the two cathode electrolyte compartments. Carbon dioxide gas in one of the cathode electrolyte compartments is used together with cathode electrolytes in both the compartments, and a voltage less than 3 V is applied across electrodes to thereby produce the base solution.
摘要:
The object of this invention is to provide an electrical deionization apparatus with which various feed water types ranging from water of high ion concentration to water of low ion concentration can be consistently deionized with high efficiency. At least part of cation-exchange membranes and anion-exchange membranes alternate between electrodes to form an alternating array of deionization and concentration compartments and the deionization compartment contains a woven or non-woven fabric made of cation-exchange fiber that is placed on the cation-exchange membrane side in a face-to-face relationship with a woven or non-woven fabric made of anion-exchange fiber that is placed on the anion-exchange membrane side, with the passageway of feed water between the two woven or non-woven fabrics containing an ion-conducting spacer provided with an ion-exchanging capability.
摘要:
PROBLEM TO BE SOLVED: To prevent the deterioration in the function of a water quality sensor.SOLUTION: The electrolytic treatment water generator comprises: a first electrolytic chamber 314; a second electrolytic chamber 315; an ion permeable diaphragm 311; a first electrode 312; a second electrode 313; a DC power source 32; a first feed part 141 of selectively feeding either service water having a low electrolyte concentration or an electrolyte aqueous solution to the first electrolytic chamber; a connection changing part 33 of changing the connection between the first electrolytic chamber and a first duct 351 and the connection between the first electrolytic chamber and a drainage 353; and a water quality sensor 34 provided on the first duct, and practices: a step of changing the connection between the first electrolytic chamber and the first duct to the connection between the first electrolytic chamber and the drainage in a state where treatment water is exhausted from the first electrolytic chamber; a step of changing the voltage to be applied to reverse voltage; a step of changing the voltage to be applied to normal voltage; and a step of changing the connection between the first electrolytic chamber and the first duct after the detection of the exhaust of the treatment water from the first electrolytic chamber.
摘要:
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.