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<p>This study demonstrates the treatment of real laboratory effluents using a continuous-flow electrocoagulation (EC) reactor with aluminum electrodes. Under optimized conditions (pH 5.0, conductivity 6.89 mS/cm, current density 10&#xa0;mA/cm², flow rate 0.1&#xa0;L/min, HRT 120&#xa0;min), removal efficiencies reached 83% for COD, 82% for color, 83% for TDS, and 83% for TOC. The process generated 1.3&#xa0;kg/m³ of sludge, characterized by amorphous aluminum hydroxides (SEM-EDX, XRD, FTIR). Energy consumption was 2.45 kWh/m³, with an operating cost of 0.48 USD/m³. The sludge shows potential for valorization as an adsorbent or construction material, supporting circular economy. The study aligns with SDG 6, SDG 9, and SDG 12.</p>

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Sustainable Continuous Electrocoagulation of Laboratory Effluents: Optimization, Sludge Characterization, and Circular Economy

  • 期刊论文

  • 发表日期：

    2026年7月4日

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  • Mourad Addich,
  • Khawla Khallal,
  • Said Meftah,
  • Hassan Haddouchy,
  • Khadija Meftah,
  • Ayoub Chahid,
  • Rachid Salghi

摘要

This study demonstrates the treatment of real laboratory effluents using a continuous-flow electrocoagulation (EC) reactor with aluminum electrodes. Under optimized conditions (pH 5.0, conductivity 6.89 mS/cm, current density 10 mA/cm², flow rate 0.1 L/min, HRT 120 min), removal efficiencies reached 83% for COD, 82% for color, 83% for TDS, and 83% for TOC. The process generated 1.3 kg/m³ of sludge, characterized by amorphous aluminum hydroxides (SEM-EDX, XRD, FTIR). Energy consumption was 2.45 kWh/m³, with an operating cost of 0.48 USD/m³. The sludge shows potential for valorization as an adsorbent or construction material, supporting circular economy. The study aligns with SDG 6, SDG 9, and SDG 12.