Conductive diamond sono-electrochemical disinfection (CDSED) for municipal wastewater reclamation |
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| Institution: | 1. School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics, 37 Xueyuan Road, Haidian District, Beijing 100191, PR China;2. Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China;3. Key Laboratory of Micro-nano Measurement-Manipulation and Physics, Ministry of Education Beihang University, Beijing 100191, China |
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| 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 0.02 kA h m−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 1.27 A m−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. |
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| Keywords: | Conductive diamond Ultrasound Electrodisinfection Wastewater reclamation Integrated process |
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