Evoqua Water Technologies Pte. Ltd.

Paul Beddoes

Joshua Griffis

Li-Shiang Liang

Simon Paul Dukes

Andrew Green

Jacob Telepciak

Michael J Shaw

George Y Gu

Darren Adrian Dale

Joshua W Griffis

Simon Dukes

Gary C Ganzi

Peter G Rogers

Ll-Shiang Liang

Muhammad Awan

A water treatment system for producing potable water and water for irrigation from saline water, the system includes an electrodialysis apparatus including one or more monovalent selective membranes and having an inlet fluidly connectable to a source of water to be treated, a diluate outlet, and a concentrate outlet, a nanofiltration apparatus positioned downstream of the electrodialysis apparatus and having an inlet fluidly connectable to the diluate outlet of the electrodialysis apparatus, a permeate outlet, and a retentate outlet, and an electrolyzer in fluid communication with one of the concentrate outlet and the retentate outlet, and configured to generate a product stream including one or more of chlorine gas, hypochlorite ion, sodium hydroxide, sulfuric acid, hydrochloric acid, or sodium hypochlorite.

Treatment of saline water for agricultural and potable use and for generation of disinfectant solution

Self-cleaning electrochemical cells, systems including self-cleaning electrochemical cells, and methods of operating self-cleaning electrochemical cells are disclosed. The self-cleaning electrochemical cell can include a plurality of concentric electrodes disposed in a housing, a fluid channel defined between the concentric electrodes, and an electrical connector positioned at a distal end of a concentric electrode and electrically connected to the electrode. The electrical connectors may be configured to provide a substantially even current distribution to the concentric electrode and minimize a zone of reduced velocity occurring downstream from the electrical connector. The electrical connector may be configured to cause a temperature of an electrolyte solution to increase by less than about 0.5° C. while transmitting at least 100 W of power.

Internal electrical connections for concentric tubular electrochemical cells

An electrochlorination system comprises a source of feed fluid, a product fluid outlet, and a plurality of electrochemical cells connected fluidically between the source of feed fluid and the product fluid outlet. The system is configured to operate at least one of the plurality of electrochemical cells at one of a first current density or a first flow rate, and to operate another of the plurality of electrochemical cells at a second current density or second flow rate different from the respective first current density or first flow rate.

Electrochlorination system configurations for the generation of high product strength solutions

Self-cleaning electrochemical cells, systems including self-cleaning electrochemical cells, and methods of operating self-cleaning electrochemical cells are disclosed. The self-cleaning electrochemical cell can include a plurality of concentric electrodes disposed in a housing, for example, a cathode and an anode, a fluid channel defined between the concentric electrodes, a separator residing between the concentric electrodes, first and second end caps coupled to respective ends of the housing, and an inlet cone. The separators may be configured to localize the electrodes and dimensioned to minimize a zone of reduced velocity occurring downstream from the separator. The end caps and inlet cone may be dimensioned to maintain fully developed flow and minimize pressure drop across the electrochemical cell.

Flow features for self-cleaning concentric tubular electrochemical cells

Self-cleaning electrochemical cells, systems including self-cleaning electrochemical cells, and methods of operating self-cleaning electrochemical cells are disclosed. The self-cleaning electrochemical cell can include a plurality of concentric electrodes disposed in a housing, a fluid channel defined between the concentric electrodes, and an electrical connector positioned at a distal end of a concentric electrode and electrically connected to the electrode. The electrical connectors may be configured to provide a substantially even current distribution to the concentric electrode and minimize a zone of reduced velocity occurring downstream from the electrical connector. The electrical connector may be configured to cause a temperature of an electrolyte solution to increase by less than about 0.5&#xb0; C. while transmitting at least 100 W of power.

An electrochlorination system includes an electrolyzer fluidically connectable between a source of feed fluid and a product fluid outlet, and a sub-system configured to one of increase a pH of the feed fluid, or increase a ratio of monovalent to divalent ions in the feed fluid, upstream of the electrolyzer.

Regulation of process stream composition for improved electrolyzer performance

An electrochemical cell includes a housing having an inlet, an outlet, and a central axis and an anode-cathode pair disposed concentrically within the housing about the central axis and defining an active area between an anode and a cathode of the anode-cathode pair. An active surface area of at least one of the anode and the cathode has a surface area greater than a surface area of an internal surface of the housing. The anode-cathode pair is configured and arranged to direct all fluid passing through the electrochemical cell axially through the active area.

Reduced volume electrochlorination cells and methods of manufacturing same

An electrochemical cell includes a cathode and an anode disposed in a housing. Each of the cathode and anode portions extending radially outward from a region proximate a central axis of the housing. A surface area of an active surface of the anode is greater than a surface area of an internal surface of the housing. A surface area of an active surface of the cathode is greater than a surface area of an internal surface of the housing.

Growing community of inventors

Bristol, United Kingdom

Paul Beddoes