The treatment of olive oil mill wastewater (OOMW) by novel sequential processes involving electrocoagulation (EC) followed by electro-Fenton (EF) or photoelectro-Fenton (PEF) under UVA irradiation has been studied using a boron-doped diamond anode and an air-diffusion cathode for H₂O₂ electrogeneration. Their performance was monitored from the removal of total organic carbon (TOC), chemical oxygen demand, turbidity, total solids and total nitrogen, as well as from the energy consumption. Preliminary EC assays were performed with one pair of electrodes made of Al, Fe, AISI 304 or AISI 316L. The Fe/Fe cell showed the best performance, yielding 40% TOC decay in 20 min. Subsequent EF or PEF at natural pH 7.2 performed similarly, whereas PEF became superior at pH 3.0 due to the action of UVA photons. Comparison between EC/PEF and single EF or PEF at pH 3.0 and 25 mA cm^-2 with 0.50 mM Fe²⁺ revealed the positive outcome of the sequential process, attaining 97.1% TOC abatement after 600 min. GC-MS analysis of the raw wastewater allowed identifying 18 cyclic and 27 aliphatic compounds, most of which could not be removed by EC. The final solutions in EC/EF and EC/PEF contained a large plethora of persistent long-chain aliphatic acids and alkanes.

已经研究了使用硼掺杂的金刚石阳极和空气通过新颖的顺序工艺处理橄榄油厂废水（OOMW）的方法，该工艺包括电凝（EC），电芬顿（EF）或光电芬顿（PEF）在UVA照射下H ₂ O _2的扩散阴极发电。通过去除总有机碳（TOC），化学需氧量，浊度，总固体和总氮以及能耗来监测其性能。使用由Al，Fe，AISI 304或AISI 316L制成的一对电极进行初步的EC分析。Fe / Fe电池表现出最佳性能，在20分钟内产生40％的TOC衰减。随后的EF或PEF在自然pH 7.2下的表现相似，而PEF由于UVA光子的作用在pH 3.0时变得更好。在pH 3.0和25 mA cm ^-2和0.50 mM Fe ^{2+的条件下}，EC / PEF与单个EF或PEF的比较揭示了顺序过程的积极结果，600分钟后，TOC减少了97.1％。对原始废水进行GC-MS分析后，可以鉴定出18种环状和27种脂族化合物，其中大多数不能被EC去除。EC / EF和EC / PEF中的最终溶液包含大量持久性长链脂肪酸和烷烃。