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Peer-reviewedCC BYDesalination and Water Treatment

Hydrodynamic and electrochemical assessment of a compact continuous-flow electrocoagulation reactor for decentralized household wastewater treatment

  • Hoang Anh Tuan1
  • Le Huynh Duc1
  • Nguyen Tuong Vi1
  • Nguyen Ngoc Anh2
  • Trieu Quy Huy3
  1. 1University of Economics and Technology for Industries, 456 Minh Khai Street, Hanoi, Viet Nam
  2. 2Chemistry Specialized Class, Hanoi-Amsterdam High School for the Gifted, Hanoi, Viet Nam
  3. 3University of Economics and Technology for Industries, 456 Minh Khai Street, Hanoi, Viet Nam; Corresponding author.
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Abstract

Compact continuous-flow electrocoagulation (EC) was evaluated for decentralized household wastewater treatment by integrating treatment experiments, residence-time-distribution (RTD) analysis, three-dimensional CFD, and electrical-energy assessment. The 3.0-L reactor employed four aluminum anodes and five stainless-steel cathodes in a monopolar-parallel arrangement with 15-mm spacing. Over nominal HRTs of 9–18 min, RTD indicated predominantly convective transport with finite axial dispersion, while single-phase CFD showed localized recirculation around the electrode array. Across the experimental series, COD removal reached 75–88%, turbidity removal exceeded 90%, TSS removal reached approximately 85–90%, and MBAS removal reached 84%. Separate series identified favorable ranges of 20–30 mA cm⁻² and 15–18 min. A paired confirmatory experiment at 15 min directly compared 20 and 25 mA cm⁻²; pollutant-removal gains at 25 mA cm⁻² were modest, whereas supply-reported specific electrical energy increased from 1.045 ± 0.031–1.431 ± 0.018 kWh m⁻³ . Thus, 20 mA cm⁻² at 15 min provided the more favorable treatment–electrical-input compromise among the two tested combinations. Faradaic aluminum doses remained theoretical, and residual aluminum, microbiological quality, and long-term robustness were not verified. The result does not establish a global optimum or reuse-ready effluent.

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Cite

BibTeXRIS
BibTeX
@article{tuan2026hydrodynamic,
  title = {{Hydrodynamic and electrochemical assessment of a compact continuous-flow electrocoagulation reactor for decentralized household wastewater treatment}},
  author = {Hoang Anh Tuan and Le Huynh Duc and Nguyen Tuong Vi and Nguyen Ngoc Anh and Trieu Quy Huy},
  journal = {Desalination and Water Treatment},
  year = {2026},
  month = oct,
  doi = {10.1016/j.dwt.2026.102002},
  url = {https://doi.org/10.1016/j.dwt.2026.102002},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Hydrodynamic and electrochemical assessment of a compact continuous-flow electrocoagulation reactor for decentralized household wastewater treatment
AU  - Hoang Anh Tuan
AU  - Le Huynh Duc
AU  - Nguyen Tuong Vi
AU  - Nguyen Ngoc Anh
AU  - Trieu Quy Huy
PY  - 2026
DA  - 2026/10/25
JO  - Desalination and Water Treatment
DO  - 10.1016/j.dwt.2026.102002
UR  - https://doi.org/10.1016/j.dwt.2026.102002
AB  - Compact continuous-flow electrocoagulation (EC) was evaluated for decentralized household wastewater treatment by integrating treatment experiments, residence-time-distribution (RTD) analysis, three-dimensional CFD, and electrical-energy assessment. The 3.0-L reactor employed four aluminum anodes and five stainless-steel cathodes in a monopolar-parallel arrangement with 15-mm spacing. Over nominal HRTs of 9–18 min, RTD indicated predominantly convective transport with finite axial dispersion, while single-phase CFD showed localized recirculation around the electrode array. Across the experimental series, COD removal reached 75–88%, turbidity removal exceeded 90%, TSS removal reached approximately 85–90%, and MBAS removal reached 84%. Separate series identified favorable ranges of 20–30 mA cm⁻² and 15–18 min. A paired confirmatory experiment at 15 min directly compared 20 and 25 mA cm⁻²; pollutant-removal gains at 25 mA cm⁻² were modest, whereas supply-reported specific electrical energy increased from 1.045 ± 0.031–1.431 ± 0.018 kWh m⁻³ . Thus, 20 mA cm⁻² at 15 min provided the more favorable treatment–electrical-input compromise among the two tested combinations. Faradaic aluminum doses remained theoretical, and residual aluminum, microbiological quality, and long-term robustness were not verified. The result does not establish a global optimum or reuse-ready effluent.
SN  - 1944-3986
SN  - 1944-3994
ER  -