Evoqua Water Technologies Pte. Ltd.

Wenxin Du

Michael J Shaw

Li-Shiang Liang

George Y Gu

Hao Dang

Frederick C Wilkins

Joshua Griffis

Simon Paul Dukes

Justin Wayne Higgs

Xiangyi Qiao

Daniel R Corrado

Romulo Dador Conde

Ryan Flood

David Bonnick

An electrochlorination process includes treating water from a source of water in an advanced water conditioning system that removes at least a portion of anions and cations from the water and produces demineralized water, blending the demineralized water with sodium chloride to form a brine solution, and treating the brine solution in an electrolyzer to form a disinfection solution including sodium hypochlorite having a concentration of chlorate of less than 0.25 mg/L.

Process of using demineralized water for chlorate reduction in on-site brine electrochlorination systems

Methods for processing pretreated phosphogypsum wastewater are disclosed. The pretreated wastewater may be subjected to electrodialysis involving at least one monovalent cation selective membrane. Further downstream membrane treatment may be applied. Upstream precipitation and air-stripping techniques may optionally also be employed. Related systems are also disclosed.

Methods and systems for treating phosphogypsum-containing water

Methods for treating phosphogypsum-containing water are disclosed. The water may be treated so as to promote precipitation of one or more target constituents and to facilitate downstream membrane treatment. A coagulant may be added to promote phosphate recovery. Ammonia may optionally be removed. Related systems are also disclosed.

A method of operating an electrochemical device includes periodically discharging a volume of concentrate reject in a timed batch cycle and replacing the concentrate reject with feed water. An electrochemical water treatment system includes a recycle line having a valve controlled by a control module. The control module periodically opens the valve to discharge concentrate reject from the recycle line in a batch timed cycle. The recycle line is fed with feed water to replace the discharged concentrate reject.

Electrochemical system with concentration recirculation in cyclic batch mode

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Dover, NH, United States of America

Wenxin Du