E3S Web Conf.
Volume 180, 20209th International Conference on Thermal Equipments, Renewable Energy and Rural Development (TE-RE-RD 2020)
|Number of page(s)||10|
|Published online||24 July 2020|
Wastewater electrooxidation using stainless steel electrodes
University Politehnica of Bucharest, Department of Biotechnical Systems, Splaiul Independentei nr. 313, sector 6, Romania
2 National Institute of Research – Development for Machines and Installations Designed to Agriculture and Food Industry – INMA Bucharest, Ion Ionescu de la Brad nr. 6, sector 1, Romania
* Corresponding author: email@example.com
Wastewater contains essential nutrients for crops, and after proper treatment its reuse is beneficial to farmers in arid and semi-arid areas. Electrooxidation is an environmentally friendly technology used for treatment of domestic, industrial and agrozootechnical wastewater. During electrooxidation, organic compounds are oxidized at the interface between the anode and the aqueous solution, as a result of the reduction reaction at the cathode. Tests were performed on wastewater collected from the lagoon of a cattle farm, using an electrooxidation cell with stainless steel electrodes. The removal of pH, conductivity, turbidity, color, total N, total P, COD and BOD was investigated at specific voltages of 0.025 V cm-2, 0.05 V cm-2 and 0.1 V cm-2 and various electrolysis times (15, 30, 60 and 120 minutes). Results show that electrooxidation is effective in reducing total N by 24 %, total P by 47 %, BOD by 47 % and COD by 82 %. After completion of tests, the suspended solids were decanted towards the anode area, due to the action of coagulant Fe2+/Fe3+ ions formed by anode dissolution, and the water was clarified. The effluent complies with the standards to be reused to irrigate crops tolerant to salinity grown in permeable soils.
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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