Comparison of the Effectiveness of Series and Parallel Monopolar Electrode Arrangements in Electrocoagulation Reactors for Reducing Color and COD
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Industrial batik wastewater contains dyes and organic compounds at high concentrations,
posing a potential threat to aquatic environments. This study aims to evaluate the
effectiveness of electrocoagulation using series and parallel monopolar electrode
configurations in reducing the levels of methylene blue, methyl red, and chemical oxygen
demand (COD) in batik wastewater. The process was carried out in batches, with
variations in electrode configuration, voltages of 6 and 9 volts, and contact times of 30–
90 minutes, using aluminium and iron electrodes. Color concentration analysis was
performed using UV–Vis spectrophotometry, while COD was analyzed using the closed
reflux method. The results showed that increasing the voltage and contact time improved
the removal efficiency of all parameters. The parallel monopolar configuration provided
the best performance, with reduction efficiencies of 95.23% for methylene blue, 90.02%
for methyl red, and 71.21% for COD. This was influenced by a more even current
distribution and more effective coagulant formation. Parallel monopolar
electrocoagulation has the potential to be applied as an alternative method for treating
batik wastewater.
Contribution to Sustainable Development Goals (SDGs):
SDG 3: Good Health and Well-Being
SDG 6: Clean Water and Sanitation
SDG 11: Sustainable Cities and Communities
SDG 14: Life Below Water
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