A dewatering apparatus for cellulosic materials includes a chamber for an aqueous solution of a cellulosic material, an inner electrode in the chamber, an outer electrode in the chamber about the inner electrode, and a power supply connected to the inner electrode and the outer electrode applying a voltage potential across the electrodes to remove water associated with the aqueous solution and to dewater the cellulosic materials.

A Dielectric Barrier Discharge system controller for controlling a fluid treatment by a Dielectric Barrier Discharge system is provided. Therein, the strength of an effect caused by a discharge created by the Dielectric Barrier Discharge system is monitored, and the generation of high-voltage pulses by the high-voltage pulse generator is controlled. The controlling of the generation of the high-voltage pulses is adapted based on the received sensor data.

A method including increasing modifying a volume of seawater that holds an amount of dissolved inorganic carbon; acidifying the amount of seawater; and collecting an amount of carbon dioxide from the acidified seawater. A system including an electrodialysis unit including an acidified solution compartment, a basified solution compartment, a membrane and an acidified solution output compartment; a vessel coupled to an inlet of the acidified solution compartment and operable to contain a modified volume of seawater therein; and a desorption unit coupled to the acidified compartment output, the desorption unit operable to receive carbon dioxide gas from a solution from the acidified output compartment.

An apparatus for providing metal ions to a fluid waste stream includes a housing having an inlet port and an outlet port through which the fluid waste stream enters and exits the housing. Within the housing and between the inlet and outlet ports is an electrode assembly that includes first electrode ring assemblies and second electrode ring assemblies. Each first electrode ring assembly includes a first tubular section formed of electrically insulative material and has an interior through which the fluid waste stream flows. One or more first electrode plates span the interior of the first tubular section and contact the fluid waste stream. Each second electrode ring assembly includes a second tubular section formed of electrically insulative material and has an interior through which the fluid waste stream flows. One or more second electrode plates span the interior of the second tubular section and contact the fluid waste stream. The first tubular sections of the first electrode ring assemblies are in fluid communication with the second tubular sections of the second electrode ring assemblies.

A water purifying and recovery system includes a first vessel defining an interior area and having an inlet for receiving water into the interior area to be purified and an outlet for draining the water from the interior area, the first vessel defining an open top in communication with the interior area. A first electrode assembly includes a first cap selectively situated in the open top of the first vessel, the first electrode assembly having a first electrode body operatively depending from the first cap and positioned in the interior area of the first vessel, the first electrode assembly being electrically connected to an electricity source and configured to energize the first electrode body. The first electrode assembly is configured to separate a predetermined first impurity from the water that is in the interior area of the first vessel when energized.

Apparatus for purifying a fluid, which comprises at least one ion absorption cell (2) with an operating chamber (4, 5) at its interior through which a first operative fluid (F1) flows and an evacuation chamber (13, 13) through which a second operative fluid (F2, F2) flows and which is separated from the operating chamber (4,5) by a filtering membrane (100). A porous electrical conductor (18) is housed in the evacuation chamber (13, 13) and is traversed by the second operative fluid (F2, F2). Two electrodes (A, B) have the aforesaid operating chamber (4, 5) and evacuation chamber (13, 13) interposed, and are supplied with opposite polarities in order to generate an operative electric field in the operating chamber (4, 5) and a limited electric field in the evacuation chamber (13, 13), the latter with value lower than the operative electric field, due to the shielding effect of the porous electrical conductor (18). The charged particles contained in the operating chamber (4, 5) are susceptible of traversing the filtering membrane (100) under the action of the operative electric field generated by the electrodes (A, B), and be evacuated by the second operative fluid (F2, F2) in the evacuation chamber (13, 13), in which they are subjected to the action of the limited electric field.

A control circuit arrangement for a water negative ion generating device includes a water mist generating circuit for driving the generation of negative ion water mist, and a high voltage charging circuit for supplementing electrons to the negative ion water mist generated by the water mist generating circuit, wherein the water mist generating circuit and the high voltage charging circuit are grounded together, thereby ensuring that the two circuits work normally and produce negative ions.

An apparatus is provided for treating a liquid with a plasma. The apparatus includes one or two dielectric barriers, and the dielectric barrier(s) and high voltage electrode define a discharge zone therebetween. A high voltage electrode may be electrically insulated from the discharge zone by the inner dielectric barrier. In this apparatus, the outer dielectric barrier is gas and the discharge zone is configured to accept a gas flow therethrough.

A redox-functionalized photoelectrode includes (a) a photoactive structure comprising a semiconductor and (b) a redox polymer coated on the photoactive structure, where a valence band potential of the semiconductor is more positive than a redox potential of the redox polymer. A photoelectrochemical method for separating targeted ionic species from a liquid includes exposing a redox-functionalized photoelectrode, which includes a photoactive structure comprising a semiconductor and a redox polymer comprising a redox-active group coated on the photoactive structure, to a liquid to be treated. During the exposure, the redox-functionalized photoelectrode is illuminated with light having a wavelength greater than a bandgap of the semiconductor. Oxidation of the redox-active group occurs, and targeted ionic species are removed from the liquid by adsorption onto the redox polymer.

A sequentially stacked multi-stage desalination system includes a single pair of electrodes, including an anode and a cathode; at least one ion concentration polarization device; and at least one electrodialysis device coupled with the ion concentration polarization device and configured to receive liquid flow from the ion concentration polarization device. Each ion concentration device and electrodialysis device is positioned between the anode and the cathode.