Inactivation of marine heterotrophic bacteria in ballast water by an Electrochemical Advanced Oxidation Process

Water Research
Javier Moreno-AndrésThomas Meyn

Abstract

Seawater treatment is increasingly required due to industrial activities that use substantial volumes of seawater in their processes. The shipping industry and the associated management of a ship's ballast water are currently considered a global challenge for the seas. Related to that, the suitability of an Electrochemical Advanced Oxidation Process (EAOP) with Boron Doped Diamond (BDD) electrodes has been assessed on a laboratory scale for the disinfection of seawater. This technology can produce both reactive oxygen species and chlorine species (especially in seawater) that are responsible for inactivation. The EAOP was applied in a continuous-flow regime with real seawater. Natural marine heterotrophic bacteria (MHB) were used as an indicator of disinfection efficiency. A biphasic inactivation kinetic model was fitted on experimental points, achieving 4-Log reductions at 0.019 Ah L-1. By assessing regrowth after treatment, results suggest that higher bacterial damages result from the EAOP when it is compared to chlorination. Furthermore, several issues lacking fundamental understanding were investigated such as recolonization capacity or bacterial community dynamics. It was concluded that, despite disinfection processes bein...Continue Reading

Citations

Oct 9, 2020·Materials·Emile Salomon Massima MoueleLeslie Felicia Petrik
Jan 27, 2019·The Science of the Total Environment·Ole-Kristian Hess-ErgaOlav Vadstein
Aug 4, 2020·Journal of Environmental Management·Lidita KhandeparkerArga Chandrashekar Anil
Jul 26, 2019·Water Research·Javier Moreno-AndrésEnrique Nebot

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