The electrochemical elimination of coliforms from water using BBD/Ti or graphite anodes: A comparative study
Gil Pavas, E.
Arbelaez, Paula Eliana
Angel Gomez-Garcia, Miguel
MetadataShow full item record
The elimination of total and fecal coliforms, from raw surface water, was carried out by electrochemical oxidation using either boron doped diamond (BDD/Ti) or graphite (GP) anodes, in a chloride-free medium. The optimal values of the operation parameters, maximizing the coliform elimination percentage, were determined using statistical experimental design. The current density ( j: 2-20 mA/cm2), the conductivity (s: 500-900 µS/cm) and the anode materials (An) were considered as variables to perform the Box-Behnken experimental design together with the response surface methodology analysis for optimization. The statistical analysis indicated that, in the evaluated range, the disinfection efficiency increased with an increase in j and decreased with an increase in s. The following optimal conditions for the elimination of total and fecal coliforms were found: j: 10 mA/cm2, s: 500 µS/cm and BDD/Ti used as anode material. The BDD/Ti electrode let to achieve complete coliform elimination after ca. 20 min of reaction while the GP one needed ca. 27 min. In water treated with both BDD/Ti and GP anode, after 7 days, any coliforms growth was observed. As a result of the oxidation process, the total organic carbon and nitrite concentration decreased while nitrate concentration increased. © IWA Publishing 2018.
Source / Editor URL
- Artículos 
Showing items related by title, author, creator and subject.
Optimization of the Operating Cost for the Electrochemical-Oxidation Process in a Water Treatment Plant Using Response Surface Statistical Analysis GIL PAVAS EDISON; Medina, J.; Dobrosz-Gómez, I.; Gómez, Miguel Angel (Centro de Informacion Tecnologica, 2016-01-01)The statistical optimization of the implementation and operational costs of an electrochemical-oxidation process for treatment of wastewater containing dye Yellow 23 was done. The aim was to optimize the operational ...
Organized Communities and Potable Water Public Utilities in Colombia: Advocacy for the Third Economic Option Based on the Common-pool Resources Theory Moncada Mesa, Jhonny; Pérez Muñoz, Carolina; Valencia Agudelo, Germán Darío (Universidad EAFIT, 2013-11-29)
What is the effect of sample and prior distributions on a Bayesian autoregressive linear model? An application to piped water consumption Ramírez Hassan, Andrés; Cardona Jiménez, Jhonatan; Pericchi Guerra, Raul (Universidad EAFIT; Escuela de Economía y Finanzas, 2014-07-23)In this paper we analyze the effect of four possible alternatives regarding the prior distributions in a linear model with autoregressive errors to predict piped water consumption: Normal-Gamma, Normal-Scaled Beta two, ...