Issue |
E3S Web Conf.
Volume 255, 2021
International Conference on Sustainable, Circular Management and Environmental Engineering (ISCMEE 2021)
|
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Article Number | 01013 | |
Number of page(s) | 12 | |
DOI | https://doi.org/10.1051/e3sconf/202125501013 | |
Published online | 03 May 2021 |
Electrochemical conditioning of recycled flotation wastewater for flotation results improving
1 University of Mining and Geology, 1700 Sofia, Bulgaria
2 BAS - Technical Sciences, 1000 Sofia, Bulgaria
* Corresponding author: marichim@mgu.bg
Flotation of minerals, an important part of the chain of metals production for our society, needs huge amounts of water. This industry can contribute to the sustainable use of water and circular economy development by utilizing its own production wastewater. However, reuse of clarified water without additional treatment may cause worsening of flotation results. Electrocoagulation of this water with mild steel sacrificial anodes, complemented by electroflotation is able to decrease the chemical oxygen demand (COD) and dissolved organic carbon (DOC) of the treated water, i.e. to remove at least partially the residual organic reagents. For the studied case 66 % of COD and nearly 32 % of DOC were removed by electrocoagulation with mild steel electrodes at energy consumption of 0, 458 kWh/m3. This warrants better results of lead-zinc flotation carried out with treated water, in comparison to the case of use of untreated water, and contributes to freshwater saving. Treated water ensured outcomes of lead-zinc flotation comparable to the results found at use of fresh tap water.
© The Authors, published by EDP Sciences, 2021
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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