In this disclosure, a process of recycling acid, base and the salt reagents required in the Li recovery process is introduced. A membrane electrolysis cell which incorporates an oxygen depolarized cathode is implemented to generate the required chemicals onsite. The system can utilize a portion of the salar brine or other lithium-containing brine or solid waste to generate hydrochloric or sulfuric acid, sodium hydroxide and carbonate salts. Simultaneous generation of acid and base allows for taking advantage of both chemicals during the conventional Li recovery from brines and mineral rocks. The desalinated water can also be used for the washing steps on the recovery process or returned into the evaporation ponds. The method also can be used for the direct conversion of lithium salts to the high value LiOH product. The method does not produce any solid effluent which makes it easy-to-adopt for use in existing industrial Li recovery plants.

The invention relates to environment management, particularly to methods for purifying a wastewater in order to eliminate a toxic impact of heavy and radioactive metals. A method for purifying fresh, combined and saline wastewater from radioactive and heavy metals using an electrolysis and a special active substance (sorbent), wherein the wastewater is fed to an electrolyzer with a chamber that is separated by a special membrane that is permeable for ions of metals separately of water, then changes of the pH occur in order to form complex compounds, which comprise ions of radioactive and heavy metals. Afterwards, the adsorption of the obtained 0 compounds by the special active substance (sorbent) and filtering-off on a precoat filter that retains ions of heavy and radioactive metals are performed. The obtained filtrate is cemented without drying and evaporation in order to perform final deposition of the radioactive 0 compounds.

An electrolytic liquid production device includes: an electrolyzer configured to perform electrolytic treatment to a liquid; elastic body configured to press the electrolyzer; and housing having the electrolyzer and elastic body disposed inside housing. Housing has inlet port that the liquid supplied to the electrolyzer flows into, and outlet port that an electrolytic liquid produced in the electrolyzer flows out from. Elastic body includes positioning depressed portion, and housing includes positioning protruding portion. Elastic body is positioned with respect to housing by inserting positioning protruding portion of housing into positioning depressed portion of elastic body. Thus, there is provided an electrolytic liquid production device capable of suppressing bias of elastic body inside housing.

An electrolytic liquid production device includes: an electrolyzer configured to perform electrolytic treatment to a liquid; elastic body configured to press the electrolyzer; and housing having the electrolyzer and elastic body disposed inside housing. Housing has inlet port that the liquid supplied to the electrolyzer flows into, and outlet port that an electrolytic liquid produced in the electrolyzer flows out from. Elastic body includes positioning depressed portion, and housing includes positioning protruding portion. Elastic body is positioned with respect to housing by inserting positioning protruding portion of housing into positioning depressed portion of elastic body. Thus, there is provided an electrolytic liquid production device capable of suppressing bias of elastic body inside housing.

An electrolytic cell for treating wastewater comprises an anode assembly, a cathode assembly and at least one bipolar electrode assembly placed between the anode and the cathode assembly such that the anodes of the anode assembly and the cathodes of the cathode assembly are interleaved with the bipolar plates of the bipolar electrode assembly. Each bipolar electrode assembly comprises a series of bipolar electrodes which operate as an anode or as a cathode, stacked in a vertical direction along a threaded bolt made of an electrically conductive material such that the bipolar electrodes operating as anodes are oriented in an opposite direction to the bipolar electrodes operating as cathodes and have their ends overlapping over a predetermined portion and being separated by conductive spacers. In preferred embodiments, only the anodes and the bipolar electrodes operating as anodes are coated with catalyst which saves costs and simplifies the manufacturing process.

A biocide-generating device including a housing having an inlet and an outlet. The biocide-generating device additionally including a strainer basket that mounts within an interior of the housing including parallel electrode plates positioned within an interior of the strainer basket. The biocide generating device additionally including a protective dielectric sleeve in which the electrode plates are received. The protective dielectric sleeve is positioned between the electrode plates and the strainer basket.

The invention relates to a system and method for treating wastewater onboard a marine vessel or other limited space application where wastewater treatment is required. In one embodiment of the invention, two polar opposite wastewater treatment processes are incorporated into the same treatment system. The system is a hybrid treatment unit that combines a conventional wastewater treatment using a moving bed biofilm reactor (MBBR) process-based biological treatment unit in combination with a novel electrochemical advanced oxidation process (EAOP) via an in-situ sodium hypochlorite recirculation. The clarified and disinfected effluent from this hybrid treatment unit is filtered to remove residual TSS. The filtered and disinfected effluent is discharged after dechlorination/neutralization. On-site maintenance disinfectant can be produced via the electrochemical/electrochlorination/electro-oxidation process and used for both treatment unit cleaning and disinfection. Additionally, the treatment unit provides a wholly separate stream of electrolysis generated disinfectant for surface disinfection purposes.

The present invention is directed to an electrochemical device for at least partially removing or reducing a target ionic species from an aqueous solution using faradic immobilization, the electrochemical device including at least one first electrode and at least one second electrode with different void fraction and surface area properties, due to differences in void fraction (also referred to as void ratio) of the at least one first and the at least one second electrode, water flows through an electrode with a high porosity, while the aqueous solution does not flow through an electrode with a low porosity. The asymmetry of the electrodes provides a desired voltage distribution across the device, which equates to a different voltage at each electrode, to control the speciation of the target ionic species at the anode and the cathode.

A fossil fuel fired power plant exhaust gas clean-up and recovery system is provided to remove detrimental exhaust gases from the power plant exhaust and to produce and reclaim various commercial byproducts. A process includes mixing one liquid solution with a solubilizer in a mixing tank containing water to create a chemical reaction therein to produce an ionic solid compound and an alkaline liquid solution. Simultaneously directing the flue gases and the alkaline liquid solution into the wet scrubber to create a chemical reaction therein. The chemical reaction removes various detrimental exhaust gases from the flue gases and captures CO.sub.2 gases therefrom, which are chemically transferred into a newly formed sodium bicarbonate solution. The sodium bicarbonate solution exiting the wet scrubber is stored for resale or reuse in the subject process. The process uses various pathways to distribute the sodium bicarbonate for producing other byproducts.

An electrolytic liquid generation device includes stacked body in which conductive membrane is stacked and interposed between cathode and anode adjacent to each other, electrolytic part that electrolyzes liquid, and housing in which electrolytic part is disposed and flow path is formed. Electrolytic part includes slot that is open in flow path, and in the slot, a part of interface between conductive membrane and cathode and anode is exposed. Either one of the electrodes of cathode and anode has an outer periphery smaller in width than slot of electrolytic part. This can provide an electrolytic liquid generation device capable of improving the concentration of an electrolytic product dissolved in liquid.