Application of Box-Behnken design to mineralization and color removal of palm oil mill effluent by electrocoagulation process

Rakhmania, Hesam Kamyab, Muhammad Ali Yuzir, Fouad Fadhil Al-Qaim, Laila Dina Amalia Purba, Fatimah Azizah Riyadi

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

In this study, palm oil mill effluent (POME) was treated using electrocoagulation, whereby the influencing factors including voltage, electrolysis time, and electrolyte amount were optimized to achieve the highest chemical oxygen demand (COD) and color removal efficiencies. Graphite was selected as electrode material due to its performance better compared to aluminum and copper. Response surface methodology (RSM) was carried out for optimization of the electrocoagulation operating parameters. The best model obtained using Box-Behnken design (BBD) were quadratic for COD removal (R2 = 0.9844), color reduction (R2 = 0.9412), and oil and grease removal (R2 = 0.9724). The result from the analysis of variance (ANOVA) was obtained to determine the relationship between factors and treatment efficiencies. The experimental results under optimized conditions such as voltage 14, electrolysis time of 3 h, and electrolyte amount of 13.41 g/L show that the electrocoagulation process effectively reduced the COD (56%), color (65%), and oil and grease (99%) of the POME treatment. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)71741-71753
Number of pages13
JournalEnvironmental Science and Pollution Research
Volume30
Issue number28
DOIs
Publication statusPublished - Jun 2023

Keywords

  • Color removal
  • Electrode materials
  • Organic removal
  • Response surface methodology
  • Wastewater treatment

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