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Optimization of a gas?liquid plasma reactor for water treatment applications: Design guidelines and electrical circuit considerations

graphical The performances of a bench scale and upscaled gas?liquid discharge reactors for water treatment applications were compared. Compounds' removal rates are controlled by the area of the plasma contacting the surface of the treated liquid and the energy delivered to the reactor. The most effective reactor electrode design features the fewest possible number of discharge points. Bench?scale results are directly applicable to larger volume systems.To provide insights into the design, optimization, and scale up?of plasma reactors for water treatment, the influences of discharge energy, grounded electrode size and position, and number of high voltage (HV) discharge points on the production of reactive species and the degradation of 1,4?dioxane and perfluorooctanoic acid in a gas?liquid electrical discharge plasma reactor were assessed. Discharge energy and plasma area largely control the treatment effectiveness. Increasing the number of discharge points lowers the voltage in the reactor and consequently the production rates of reactive species. Bench?scale findings apply directly to large volume systems, resulting in the highest contaminant removal rates using a single HV electrode and a grounded electrode spanning the entirety of the treatment zone.

» Author: Chase Nau?Hix, Thomas M. Holsen, Selma Mededovic Thagard

» Publication Date: 25/04/2022

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