Palm oil mill effluent (POME), wastewater generated from palm oil production, is known for its extremely high chemical oxygen demand and brownish color. Anaerobic digestion is the primary treatment method for POME in the palm oil industry; however, anaerobically treated POME has high concentrations of residual contaminants and color intensity. This study proposes an approach to treat anaerobically-treated POME in recycled water for industrial applications by integrating preliminary organic precipitation, electrocoagulation, and electrooxidation (EO). The EO process was optimized in terms of the current density, electrolysis time, electrode arrangement, and feed flow rate. At a current density of 60 mA/cm² and an electrolysis time of 9 min, the EO process with a graphite anode and stainless-steel cathode in the monopolar electrode configuration reduced the phenolic concentration and color in the preliminary-treated POME from 8.95 mg/L and 317.19 ADMI to 0.25 mg/L and 26.10 ADMI, respectively. Additionally, the EO process exhibited a 92.26% efficiency in lowering the ammonium-nitrogen content.

棕榈油厂废水 (POME) 是棕榈油生产过程中产生的废水，以其极高的化学需氧量和褐色而闻名。厌氧消化是棕榈油工业中POME的主要处理方法；然而，经过厌氧处理的 POME 具有高浓度的残留污染物和高颜色强度。本研究提出了一种通过整合初步有机沉淀、电凝和电氧化 (EO) 来处理工业应用循环水中经厌氧处理的 POME 的方法。 EO 工艺在电流密度、电解时间、电极排列和进料流量方面进行了优化。在电流密度为 60 mA/cm ² 、电解时间为 9 分钟时，单极电极配置中采用石墨阳极和不锈钢阴极的 EO 工艺将初步处理的 POME 中的酚类浓度和颜色从 8.95 mg 降低/L 和 317.19 ADMI 分别为 0.25 mg/L 和 26.10 ADMI。此外，EO工艺在降低铵态氮含量方面表现出92.26%的效率。