In this study, we present a sequential electrochemical process for integral treatment of anaerobic sludge, combining for the first time electrochemical peroxidation (ECP) and electro-Fenton (EF). In the first step, ECP (consisting of H₂O₂-assisted electrocoagulation with Fe electrodes) was applied as a conditioning and stabilizing method, whose synergistic electrocoagulation/Fenton oxidation effects considerably reduced the COD, TOC and total suspended solids (TSS) by 89.3%, 75.4% and 85.6%, respectively, under optimized conditions (initial pH of 5, [H₂O₂]/[Fe²⁺] dose ratio of 5, 15.38 mA cm^-2 and 2 h treatment). Furthermore, total coliforms were completely killed within the first hour of treatment. In the second step, EF was successfully applied to mineralize the remaining organic fraction in the liquid effluent after dewatering, achieving 91.6% and 87.2% of COD and TOC removal, respectively, after 4 h of treatment under optimal conditions (pH 3 and 25 mA cm^-2), while almost total COD and TOC removal was attained in 8 h. The Fe sludge generated at the end of the ECP treatment was easily dewatered by filtration and 20.9 g of nutrient-rich dry sludge were produced. The overall cost of the ECP-EF treatment was S$ 0.05 L^-1 sludge. The combined effects of coagulation and Fenton oxidation during ECP revealed that the treatment efficiency is strongly dependent on the rheological properties of the sludge sample.

在这项研究中，我们提出了一种顺序的电化学工艺，用于厌氧污泥的整体处理，首次结合了电化学过氧化（ECP）和电Fenton（EF）。第一步，使用ECP（由H ₂ O ₂辅助的Fe电极电凝）作为调节和稳定化方法，其协同的电凝/ Fenton氧化作用可通过以下方式显着降低COD，TOC和总悬浮固体（TSS）：在优化条件下（初始pH值为5，[H ₂ O ₂ ] / [Fe ²⁺ ]的剂量比为5，15.38 mA cm ^-2）分别为89.3％，75.4％和85.6％和2小时的治疗）。此外，总的大肠菌群在治疗的第一个小时内被完全杀死。在第二步中，成功地使用了EF进行了矿化，脱水后，在最佳条件下（pH 3和25 mA）处理了4小时，分别去除了废水中剩余的有机部分，分别实现了91.6％和87.2％的COD和TOC去除率。 cm ^-2），而在8小时内几乎完全去除了COD和TOC。在ECP处理结束时产生的Fe污泥很容易通过过滤脱水，并生产了20.9 g富含营养的干污泥。ECP-EF治疗的总费用为S $ 0.05 L ^-1污泥。ECP期间凝结和Fenton氧化的综合作用表明，处理效率在很大程度上取决于污泥样品的流变特性。