title: Soft drink wastewater treatment by electrocoagulation-electrooxidation processes.
abstract: The aim of this work was to implement a coupled system, a monopolar Electrocoagulation (EC)-Electrooxidation (EO) processes, for the treatment of soft drink wastewater. For the EC test, Cu-Cu, anode-cathode were used at current densities of 17, 51 and 68 mA cm-2. Only 37.67% of chemical oxygen demand (COD) and 27% of total organic carbon (TOC) were removed at 20 min with an optimum pH of 8, this low efficiency can be associated with the high concentration of inorganic ions which inhibit the oxidation of organic matter due to their complexation with copper ions. Later EO treatment was performed with boron-doped diamond-Cu electrodes and a current density of 30 Am-2. The coupled EC-EO system was efficient to reduce organic pollutants from initial values of 1875 mg L-1TOC and 4300 mg L-1COD, the removal efficiencies were 75% and 85%, respectively. Electric energy consumption to degrade a kilogram of a pollutant in the soft drink wastewater using EC was 3.19 kWh kg-1TOC and 6.66 kWh kg-1COD. It was concluded that the coupled system EC-EO was effective for the soft drink wastewater treatment, reducing operating costs and residence time, and allowing its reuse in indirect contact with humans, thus contributing to the sustainable reuse as an effluent of industrial wastewater.
authors.affiliation: a Centro Interamericano de Recursos del Agua (CIRA) , Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Ivonne
authors.initials: I
authors.lastname: Linares Hernández
authors.affiliation: b Centro Conjunto de Investigación en Química Sustentable , UAEM-UNAM, Carretera Toluca-Atlacomulco , Toluca , Estado de México , México.
authors.forename: Carlos
authors.initials: C
authors.lastname: Barrera Díaz
authors.affiliation: b Centro Conjunto de Investigación en Química Sustentable , UAEM-UNAM, Carretera Toluca-Atlacomulco , Toluca , Estado de México , México.
authors.forename: Mario
authors.initials: M
authors.lastname: Valdés Cerecero
authors.affiliation: a Centro Interamericano de Recursos del Agua (CIRA) , Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Perla Tatiana
authors.initials: PT
authors.lastname: Almazán Sánchez
authors.affiliation: a Centro Interamericano de Recursos del Agua (CIRA) , Universidad Autónoma del Estado de México , Toluca , Estado de México , México.
authors.forename: Monserrat
authors.initials: M
authors.lastname: Castañeda Juárez
authors.affiliation: c Dirección de Mecatrónica y Sistemas productivos , Universidad Tecnológica del Valle de Toluca , Lerma , Mexico.
authors.forename: Violeta
authors.initials: V
authors.lastname: Lugo Lugo
mesh_terms: D057919:Biological Oxygen Demand Analysis; D002253:Carbonated Beverages; D055664:Electrochemical Techniques; D019649:Food Industry; D007220:Industrial Waste; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical
keywords: BDD; Electrocoagulation; copper electrodes; electrooxidation; soft drink wastewater