This study aimed to improve the performance of the continuous flow electrocoagulation (EC)-microscreen drum filter (MDF) system in treating mariculture wastewater by investigating the passivation behavior of electrodes under different factors. Using response surface methodology, the effects of salinity (10–30‰), current density (15–75 A/m²), inlet flow (100–300 L/h), and electrode's continuous working time (without polarity change) (8–40 min) on current efficiency, total suspended solids (TSS) removal, cathode, and energy consumption of the EC-MDF system were investigated. Results showed that higher salinity improved current efficiency, alleviated anode passivation, enhanced TSS removal, reduced energy consumption, but aggravated cathode passivation. The current and TSS removal efficiencies increased with the current density, whereas the energy consumption and cathode passivation were intensified. By increasing the inlet flow, the current efficiency was improved, the anode passivation and energy consumption were alleviated, but the removal of TSS depreciated. Initially, the cathode gained significant weight before decreasing slightly as the inlet flow was upped, and the inflection point was about 250 L/h. By increasing the continuous working time of the electrode without polarity change, the passivation of the anode and cathode was aggravated, resulting in lower current and TSS removal efficiencies but higher energy consumption.

中文翻译：

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电凝-微筛转鼓过滤技术处理海水养殖废水：电极钝化及影响因素

本研究旨在通过研究电极在不同因素下的钝化行为，提高连续流电凝聚（EC）-微筛转鼓过滤器（MDF）系统处理海水养殖废水的性能。使用响应面法，盐度 (10–30‰)、电流密度 (15–75 A/m ²)、入口流量 (100–300 L/h) 和电极的连续工作时间（无极性变化）（8–40 分钟）对电流效率、总悬浮固体 (TSS) 去除、阴极和 EC- 能耗的影响MDF系统进行了调查。结果表明，较高的盐度提高了电流效率，减轻了阳极钝化，增强了 TSS 去除，降低了能耗，但加重了阴极钝化。电流和 TSS 去除效率随着电流密度的增加而增加，而能耗和阴极钝化则加剧。通过增加入口流量，提高了电流效率，减轻了阳极钝化和能耗，但对 TSS 的去除降低了。最初，阴极的重量显着增加，然后随着入口流量的增加而略有下降，拐点约为 250 L/h。通过在不改变极性的情况下增加电极的连续工作时间，加剧了阳极和阴极的钝化，导致电流和 TSS 去除效率降低，但能耗增加。