The rapid growth in the world population and fast developing industrialization have resulted in the acceleration of environmental pollution due to inadequate treatment methods accompanied by depletion of freshwater. The current research focused on the batch treatment of slaughter house wastewater (SWW) using the sequential three-step electro-coagulation (EC)–electro-oxidation (EO)–adsorption column (AC) processes and to compare the optimized values with the Omani National Standards for the application in irrigation purpose. The characterization of SWW before and after treatment was carried out by measuring chemical oxygen demand (COD), total organic carbon (TOC), total dissolved solids (TDS), turbidity, ammoniacal nitrogen (NH₄–N) and conductivity. The optimization of the treatment processes was performed by response surface methodology (RSM) using central composite design. The maximum response obtained using EC unit was 99% with an operating cost of 2.78 USD/m³. The optimum treatment conditions in EC method were found to be 4.0 pH, electrolysis time of 30 min and electrolyte dosage of 5 g/L, with a current density of 18.11 mA/cm². The maximum reduction in COD was 97% with an operating cost 0.32 USD/m³. The optimum COD reduction in EO method was 84.5% with an operating cost of 6.87 USD/m³. The optimum process parameters in the EO process were observed at 5.0 pH, 56.22 min electrolysis time with 5 g/L electrolyte dosage and a current density of 5 mA/cm². The response shows 56.27% reduction in COD with an operating cost of 0.088 USD/m³. The study demonstrates that both EC and EO processes for the reduction of COD have a significant effect on the current density. Using adsorption column (AC) studies, the maximum reduction in COD was 76.8% with negligible operating cost. The optimum pH in the case of AC was 7.5, with an effluent flow rate of 8.63 mL/min, and the responses were found to be 76.067%, which indicates both pH and flow rate have significant effect on the % removal of COD.

世界人口的快速增长和工业化的快速发展，由于处理方法不充分，淡水枯竭，导致环境污染加速。目前的研究重点是使用连续三步电凝聚 (EC)-电氧化 (EO)-吸附柱 (AC) 工艺批量处理屠宰场废水 (SWW)，并将优化值与阿曼用于灌溉目的的国家标准。通过测量化学需氧量 (COD)、总有机碳 (TOC)、总溶解固体 (TDS)、浊度、氨态氮 (NH ₄–N) 和电导率。处理过程的优化是通过响应面法 (RSM) 使用中心复合设计进行的。使用 EC 单元获得的最大响应为 99%，运营成本为 2.78 美元/m ³。EC方法的最佳处理条件为pH 4.0，电解时间30 min，电解液用量5 g/L，电流密度18.11 mA/cm ²。COD 的最大降低为 97%，运营成本为 0.32 美元/m ³。EO法最佳COD降低率为84.5%，运行成本为6.87美元/m ³。在 5.0 pH、56.22 min 电解时间、5 g/L 电解液用量和 5 mA/cm 电流密度下观察到 EO 工艺中的最佳工艺参数² . 响应显示 COD 降低了 56.27%，运营成本为 0.088 美元/m ³。该研究表明，用于降低 COD 的 EC 和 EO 过程对电流密度有显着影响。使用吸附柱 (AC) 研究，COD 的最大降低为 76.8%，运行成本可忽略不计。AC 的最佳 pH 值为 7.5，出水流速为 8.63 mL/min，响应为 76.067%，这表明 pH 值和流速对 COD 的去除百分比都有显着影响。