Electrochemical treatment of shrimp farming effluent: role of electrocatalytic material
2017
de Menezes, Francisco Leonardo Gomes | da Silva, André Jailson Cabral | Martínez-Huitle, Carlos Alberto | Zanta, Carmem Lúcia Paiva Silva | Alves, Janete Jane Fernandes | Castro, Suely Souza Leal
This study investigated the electrochemical oxidation of organic matter present in shrimp farming effluent using three types of electrocatalytic materials: Ti/Ru₀.₃₄Ti₀.₆₆O₂, Ti/Pt, and boron-doped diamond (BDD). An electrochemical cell with 300 mL under stirring agitation was used by applying 20, 40, and 60 mA cm⁻². A Ti/Ru₀.₃₄Ti₀.₆₆O₂ anode showed a reduction of chemical oxygen demand (COD) about 84 % after 1 h of electrolysis, while at the same time, 71 % of COD decay was achieved at Ti/Pt. Conversely, only 71 % of COD was removed after 2 h with a BDD anode. Regarding the temperature effect, BDD showed better performances than those achieved for Ti/Ru₀.₃₄Ti₀.₆₆O₂ and Ti/Pt anodes during an electrochemical treatment of a shrimp farming effluent, obtaining 72 % of COD removal by applying 20 mA cm⁻² at 40 °C after 15 min. Energy consumption and cost were estimated in order to established the engineering applicability of this alternative process.
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