Wastewater from Biodiesel Purification: Electroflocculation Treatment and Iron Perchloride Synthesis for Printed Circuit Boards Production.
Journal Title: IOSR Journals (IOSR Journal of Electrical and Electronics Engineering) - Year 2017, Vol 12, Issue 3
Abstract
Biodiesel production by alkaline catalysis on methane route generally requires a purification step, generating wastewater that presents contaminating components in its composition, preventing it to be disposed, as established in CONAMA Resolution No. 430/2011. Reuse Alternatives and practical applications aiming to minimizing the water contamination has been the target of several studies on scientific community. Electroflocculation process was used to treat wastewater from biodiesel purification stage. This treatment was carried out in an electrochemical reactor composed of rectangular iron electrodes 9 cm long and 3 cm wide. Electrodes were fixed in a 0.5 L beaker through a metal structure, and wires were soldered for connection of a 2.0 A DC current source, powered by a photovoltaic system. The resulting effluent composed mainly of iron chloride II was oxidized by addition of hydrogen peroxide to iron chloride III (iron perchloride). Supernatant solution was separated for coagulation tests and the residual solution had its pH decreased to 1.0. Subsequently, the final solution was concentrated in an oven during 6 h at 90°C. Iron perchloride solution obtained from waste waters of biodiesel was used to make printed circuit boards.
Authors and Affiliations
Samara Pereira Vieira, Fernando Carlos Ferreira Oliveira, Fabiano Almeida Nascimento, Luiz Antônio Pimentel Cavalcanti
Keywords
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- EP ID EP387151
- DOI 10.9790/1676-1203012629.
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