title: Conductive diamond sono-electrochemical disinfection (CDSED) for municipal wastewater reclamation.
abstract: In the present work, the disinfection of actual effluents from a municipal wastewater treatment plant (WWTP) by a conductive diamond sono-electrochemical process was assessed. First, efficiency of single electrodisinfection process with diamond anodes (without the contribution of ultrasounds) was studied, finding that the total disinfection can be attained at current charges applied below 0.02kAhm(-3). It was also found that the main disinfection mechanism is the attack of Escherichia coli (E. coli) by the disinfectants produced in the electrochemical cell and that the production of chlorates is avoided when working at current densities not higher than 1.27Am(-2). Next, a marked synergistic effect was found when coupling ultrasound (US) irradiation to the electrochemical system (sono-electrochemical disinfection). This increase in the disinfection rate was found to be related to the suppression of the agglomeration of E. coli cells and the enhancement in the production of disinfectant species.
authors.affiliation: Chemical Engineering Department, University of Castilla-La Mancha, Edificio Enrique Costa Novella, Campus Universitario s/n, 13005 Ciudad Real, Spain. Electronic address: javier.llanos@uclm.es.
authors.forename: Javier
authors.initials: J
authors.lastname: Llanos
authors.affiliation: Chemical Engineering Department, University of Castilla-La Mancha, Edificio Enrique Costa Novella, Campus Universitario s/n, 13005 Ciudad Real, Spain.
authors.forename: Salvador
authors.initials: S
authors.lastname: Cotillas
authors.affiliation: Chemical Engineering Department, University of Castilla-La Mancha, Edificio Enrique Costa Novella, Campus Universitario s/n, 13005 Ciudad Real, Spain.
authors.forename: Pablo
authors.initials: P
authors.lastname: Cañizares
authors.affiliation: Chemical Engineering Department, University of Castilla-La Mancha, Edificio Enrique Costa Novella, Campus Universitario s/n, 13005 Ciudad Real, Spain.
authors.forename: Manuel A
authors.initials: MA
authors.lastname: Rodrigo
mesh_terms: D018130:Diamond / Q000737:chemistry*; D004203:Disinfection / Q000379:methods*; D004553:Electric Conductivity; D004563:Electrochemistry; D004566:Electrodes; D004926:Escherichia coli / Q000302:isolation & purification; D010084:Oxidation-Reduction; D013010:Sonication; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*; D018508:Water Purification / Q000379:methods*
chemical_list: D018130:Diamond; D062065:Wastewater
keywords: Conductive diamond; Electrodisinfection; Integrated process; Ultrasound; Wastewater reclamation