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Electrocoagulation treatment of raw palm oil mill effluent: Optimization process using high current application.
Mohd Nasrullah1, Sabah Ansar2, Santhana Krishnan3
1Faculty of Civil Engineering Technology, Universiti Malaysia Pahang (UMP), Lebuhraya Tun Razak, 26300, Gambang, Kuantan, Pahang, Malaysia.
Chemosphere
|March 27, 2022
Summary
Optimizing electrocoagulation with high current intensity effectively treats palm oil mill effluent (POME). This method significantly removes chemical oxygen demand (COD), biological oxygen demand (BOD), and suspended solids (SS) for cleaner wastewater.
Area of Science:
- Environmental Engineering
- Water Treatment Technologies
- Electrochemistry
Background:
- Palm oil mill effluent (POME) is a highly polluting wastewater requiring effective treatment.
- Electrocoagulation (EC) is a promising technique for treating challenging industrial wastewaters.
- High current intensity in EC can enhance treatment efficiency for recalcitrant pollutants.
Purpose of the Study:
- To optimize electrocoagulation parameters for treating POME using high current intensity.
- To investigate the impact of operation time, electrode gap, and initial pH on POME treatment.
- To achieve high removal rates for chemical oxygen demand (COD), biological oxygen demand (BOD), and suspended solids (SS).
Main Methods:
- Application of Box-Behnken design (BBD) for experimental optimization.
- Treatment of POME using electrocoagulation with optimized high current intensity.
- Analysis of variance (ANOVA) to validate the significance of the models and parameters.
- Quantification of COD, BOD, and SS removal efficiencies.
Main Results:
- High correlation (R² > 0.99) observed between parameters and removal efficiencies for COD, BOD, and SS.
- Optimal conditions achieved: 19.07 A current intensity, 44.97 min treatment time, 8.60 mm electrode gap, and pH 4.37.
- Resulting removal efficiencies: 97.21% COD, 99.26% BOD, and 99.00% SS.
Conclusions:
- The optimized electrocoagulation process with high current intensity is highly effective for POME treatment.
- The study provides a validated, efficient scheme for treating highly polluted wastewater.
- This approach can serve as a benchmark for future research in industrial wastewater treatment.
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