Comparison of Treatment Efficiency and Energy Consumption of Batch and Continuous Electrocoagulation in Urban Wastewater

In this study, domestic wastewater was used as the electrolyte. The work was carried out with an up‐flow tubular reactor, made of stainless steel that was used as cathode, while the anode electrode material was aluminum and varying values of flow regime (25, 50, 75 and 100 mL/s for continuous system...

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Bibliographic Details
Published in:Clean : soil, air, water air, water, 2023-01, Vol.51 (1), p.n/a
Main Authors: Yılmaz, Alper Erdem, Sağsöz, Yeşim Dede, Fil, Baybars Ali, Yılmaz, Murat Tolga
Format: Article
Language:English
Subjects:
Aluminium
Aluminum
Cathodes
circulation and flow rate
COD removal
current intensity
Domestic wastewater
Effluents
Electrocoagulation
Electrode materials
Energy
Energy consumption
pH effects
Rivers
Stainless steel
Stainless steels
Streams
Wastewater treatment
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Summary:In this study, domestic wastewater was used as the electrolyte. The work was carried out with an up‐flow tubular reactor, made of stainless steel that was used as cathode, while the anode electrode material was aluminum and varying values of flow regime (25, 50, 75 and 100 mL/s for continuous system), initial pH value (5, 6, 7 and 7.8) and current intensity (10, 15 and 20 A) were applied. For domestic wastewater with natural pH, the effluent pH was >9 in the batch system, while in the continuous system the pH was 8–8.5. Likewise, while the effluent temperature was up to 60°C in the batch system, it was at most 35°C in the continuous system. However, the energy consumption values in the continuous system were considerably lower compared with the batch system. At a current intensity of 10 A, 80 kWh of energy per unit volume was consumed in the batch system, while it was 50 kWh for the continuous system. The present results show that the batch system can be used for small wastewater streams whereas the continuous system can be used for large wastewater streams for domestic wastewater treatment. The electrocoagulation process is an extremely suitable process for the effective treatment of wastewater containing suspended solids and organic matter, such as domestic wastewater. This process can be used effectively especially for wastewater with low flow and conductivity.
ISSN:1863-0650
1863-0669
DOI:10.1002/clen.202200032