The wastewater treatment apparatus of present invention has an electro-coagulation unit for removing contaminants with at least one anode and at least one cathode and an electro-oxidation unit for oxidizing contaminants with at least one anode and at least one cathode wherein oxidants are electrochemically generated. Based on the type of wastewater, the apparatus can have an electro-flotation unit between the electrocoagulation unit and the electro-oxidation unit. The apparatus also has an oxidant removal unit which can have a metal ion-liberating electrode for reacting with and removing residual oxidants. In some cases, portions of effluent from the oxidant removal unit can be recirculated to the electro-coagulation unit for increased efficiency.

Provided herein are systems and methods for separation of particulate from water using ultrasonically generated acoustic standing waves.

An electrochemical filter system is provided that can produce an ultra-clean electrolyte solution. The filter uses a working electrode with binding sites that adsorb impurities present in the electrolyte solution using a pseudocapacitive process.

A water treatment process that includes associating the water treatment process with an offshore operation; receiving a treated water stream comprising floc into a flotation vessel. The process further includes injecting an injection stream into the flotation vessel to interact with the treated water stream and removing floc from the treated water stream to form a secondary treated water stream.

A method and an apparatus for retrofit electrolization of seawater for production of halogen biocides in situ. A method for effecting an in situ generation of biocide as an aid in anti-biofouling of a device disposed in a volume of salt water includes a) associating a cathode electrode to the device; b) associating an anode electrode to the device with the anode electrode spaced apart from the cathode electrode; and c) hydrolyzing one or more components in the volume of salt water to generate a halogen biocide at the anode electrode with the biocide flowing from the anode electrode away from the cathode electrode as a biocide film, the film responsive to a physical arrangement of the associations of the electrodes with the device.

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.

The present invention relates to a device for recovering lithium included in a solution such as sea water, and to a sea water lithium-recovery device and a lithium-recovery station using coastal-water-based lithium-adsorption equipment and shore-based lithium-isolation equipment and a lithium desorption device using aeration.

An electrode material for extracting an elemental ion from a liquid medium includes at least one electrode material having at least one ion sieve that is capable of retaining or releasing an elemental ion, or a mixture of such ion sieves, wherein the ion sieve or ion sieves is or are coated with carbon.

Apparatus and methods are provided for the targeted removal and degradation of at least one contaminant from a fluid stream with at least one physical retention unit containing a retention material configured to receive and capture the at least one contaminant from the fluid stream, and at least one electrochemical cell having a first and a second electrode, operatively connected to the physical retention unit, wherein at least one oxidizing agent(s) generated by electro-oxidative reactions of the at least one electrochemical cell are supplied to the physical retention unit to contact and degrade the at least one contaminants retained and captured within the retention material.

Provided are a binder composition for an electrode for a capacitive deionization device including a first polymer including a first structural unit including a zwitterionic functional group and a second structural unit including a cross-linkable functional group, a cross-linking agent, and ionic functional group, an electrode for a capacitive deionization device including the composition, a capacitive deionization device including the electrode, and a method of removing ions from a fluid using the device.