Effects of direct and alternating current on the treatment of oily water in an electroflocculation process
AUTOR(ES)
Cerqueira, A. A., Souza, P. S. A., Marques, M. R. C.
FONTE
Braz. J. Chem. Eng.
DATA DE PUBLICAÇÃO
2014-09
RESUMO
In the direct current mode (DC), widely used in electroflocculation (EC), the formation of an impermeable oxide layer on the cathode causes the declining of the efficiency of this process. This disadvantage has been reduced by adopting alternating current (AC). In this study, the effects of AC and DC on operational parameters such as the removal of oils and greases (O&G), color and turbidity from oil-in-water (O/W) emulsions of the petroleum industry using aluminum electrodes were investigated. Removal efficiencies of 95%, 97% and 99% of O&G, color and turbidity with energy consumption of 0.280 kWh/m³ and electrode consumption of 0.12 g and 0.18 g were achieved at a current density of 3 A, operation time of 3 minutes and initial pH of 9.0 using AC and DC, respectively. In continuous flow tests performed with the same experimental conditions, the electrode consumption at times up to 60 minutes were 1.6 g and 3.4 g using AC and DC, respectively.
Documentos Relacionados
- Inactivation of Vibrio parahaemolyticus in Effluent Seawater by Alternating-Current Treatment
- EXPERIMENTAL INVESTIGATION OF THE EFFECTS OF: DIRECT CURRENT ELECTRIC SHOCK ON RESPIRATION
- The Effects of Fungi on the Direct Current Conductance of Electrical Insulating Materials
- Electroflocculation for textile wastewater treatment
- Epicoccum nigrum and Cladosporium sp. for the treatment of oily effluent in an air-lift reactor