Brazilian Journal of Chemical Engineering
On-line version ISSN 0104-6632
CERQUEIRA, A.; RUSSO, C. and MARQUES, M. R. C.. Electroflocculation for textile wastewater treatment. Braz. J. Chem. Eng. [online]. 2009, vol.26, n.4, pp. 659-668. ISSN 0104-6632. http://dx.doi.org/10.1590/S0104-66322009000400004.
This work reports on the viability of the electroflocculation (EF) process for chemical oxygen demand (COD), turbidity and color removal from a raw effluent originated from a particular textile industry related to hemp manufacture. Firstly, the following operational parameters were optimized: current density; initial pH; electrolysis time; material of the electrode (iron, aluminum or iron-aluminum); and interelectrode distance. Additionally, the effects of these parameters on specific electrical energy consumption (SEEC) were studied under the optimum conditions. The best removal efficiencies obtained were 93% for color, 99% for turbidity and up to 87% for COD using an aluminum electrode, the initial pH was 5, the cell time operation was 30 min and current density was 15 A/m2. These results indicate that, under the studied operational conditions, electroflocculation of these efluents may constitute a viable alternative for COD, turbidity and color removal.
Keywords : Textile effluent; Dye; Electroflocculation.