Publication: Hybrid RSM–ANN Modeling for Optimization of Electrocoagulation Using Aluminum Electrodes (Al–Al) for Hospital Wastewater Treatment
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Issued Date
2025-10-01
Resource Type
eISSN
20734441
Scopus ID
2-s2.0-105020013148
Journal Title
Water Switzerland
Volume
17
Issue
20
Rights Holder(s)
SCOPUS
Bibliographic Citation
Water Switzerland Vol.17 No.20 (2025)
Suggested Citation
Matra K., Lerkmahalikit Y., Prasertkulsak S., Kongdee A., Pomthong R., Thongson S., Theepharaksapan S. Hybrid RSM–ANN Modeling for Optimization of Electrocoagulation Using Aluminum Electrodes (Al–Al) for Hospital Wastewater Treatment. Water Switzerland Vol.17 No.20 (2025). doi:10.3390/w17203003 Retrieved from: https://hdl.handle.net/20.500.14740/50689
Corresponding Author(s)
Other Contributor(s)
Abstract
Electrocoagulation (EC) employing aluminum–aluminum (Al–Al) electrodes was investigated for hospital wastewater treatment, targeting the removal of turbidity, soluble chemical oxygen demand (sCOD), and total dissolved solids (TDS). A hybrid modeling framework integrating response surface methodology (RSM) and artificial neural networks (ANN) was developed to enhance predictive reliability and identify energy-efficient operating conditions. A Box–Behnken design with 15 experimental runs evaluated the effects of pH, current density, and electrolysis time. Multi-response optimization determined the overall optimal conditions at pH 7.0, current density 20 mA/cm<sup>2</sup>, and electrolysis time 75 min, achieving 94.5% turbidity, 69.8% sCOD, and 19.1% TDS removal with a low energy consumption of 0.34 kWh/m<sup>3</sup>. The hybrid RSM–ANN model exhibited high predictive accuracy (R<sup>2</sup> > 97%), outperforming standalone RSM models, with ANN more effectively capturing nonlinear relationships, particularly for TDS. The results confirm that EC with Al–Al electrodes represent a technically promising and energy-efficient approach for decentralized hospital wastewater treatment, and that the hybrid modeling framework provides a reliable optimization and prediction tool to support process scale-up and sustainable water reuse.