2018-Sustainable Industrial Processing Summit
SIPS2018
Volume 6. New and Advanced Materials and Technologies
| Editors: | F. Kongoli, F. Marquis, P. Chen, T. Prikhna, N. Chikhradze |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2018 |
| Pages: | 392 pages |
| ISBN: | 978-1-987820-92-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Electroflotation Process Using DSA® Electrodes to Cyanobacteria Removal From Water Supply
Thyara Campos Martins Nonato1; Tiago Burgardt2; Alcione Alves3; Mauricio Sens2;1, Florianópolis, Brazil; 2UFSC, Florianópolis, Brazil; 3UFFS, Cerro Largo, Brazil;
Type of Paper: Regular
Id Paper: 153
Topic: 43
Abstract:
The occurrence of cyanobacteria in freshwater is a global problem, particularly when considering that these waters are used for human consumption as drinking water. Because cyanobacteria contains toxic substances that produce hepatoxins and neurotoxins, it can cause acute and chronic intoxication, which reaches the liver cells and the neuromuscular system, making it harmful to human health. Cyanobacteria cells are still difficult to remove in conventional treatment systems. For the removal of cyanobacteria in water sources used for public water supply, the electroflotation process is presented as a viable treatment alternative. Thus, this research had the objective of studying the removal of cyanobacteria from the water supply through the electroflotation process, using DSA®-type, dimensionally stable anodes composed of Ti / Ru0,3Ti0,7O2. The spring water from Peri Lagoon was used, which is located in the city of Florianópolis / SC, Brazil. In the pilot system, the effects of the operational variables of the electrochemical reactor, water input rate and electric current density, were studied. The performance of the electroflotation process was determined by the removal of cyanobacteria cells in the treated water. According to the results, there was approximately a 73% removal of cyanobacteria after 30 min of electrolysis, and approximately 78% after 60 min, for the water input rate of 100.84 m3m-2d-1 and electric current density of 68.26 A m-2. Under these conditions, the energy consumption was 1.28 kWh m-3. The electrochemical process also showed a removal of 60% and 49% of the apparent color and turbidity of the water, respectively. These results encourage the applicability of the electroflotation process as a pre-treatment alternative for the removal of cyanobacteria from the water supply.
Keywords:
Environment; New and advanced technology; Water purification;References:
[1] Nonato, T.C.M., Alves, A.A.A., Broock, W.F., Dalsasso, R.L., Sens, M.L., 2017. The optimization of the electroflotation process using DSA® electrodes for treating the simulated effluent of produced water from oil production. Desalination and Water Treatment 70, 139-144. DOI: 10.5004/dwt.2017.20490[2] Tavares, M.G., Santos, D.H.S., Torres, S.J.A., Pimentel, W.R.O., Tonholo, J., Zanta, C.L.P.S., 2016. Efficiency and toxicity: comparison between the Fenton and electrochemical processes. Water Science and Technology 74 (5), 1143-1154. DOI: 10.2166/wst.2016.278
[3] Trasatti, S., 2000. Electrocatalysis: understanding the success of DSA®. Electrochimica Acta 45 (15-16), 2377-2385. DOI:10.1016/S0013-4686(00)00338-8.