Abstract：
Throughout the entire process of sludge treatment and disposal, it is crucial to explore stable and efficient techniques to improve sludge dewaterability, which can facilitate subsequent resource utilization and space and cost savings. Traditional Fenton oxidation has been widely researched to enhance the performance of sludge dewaterability, which was limited by the additional energy input and the instabilities of Fe2+ and H2O2. To reduce the consumption of energy and chemicals and further break the rate-limiting step of the iron cycle, a novel and feasible method that constructed microbial fuel cell powered electro-Fenton systems (MFCⓅEFs) with ferrite and biochar electrode (MgFe2O4@BC/CF) was successfully demonstrated. The MFCⓅEFs with MgFe2O4@BC/CF electrode achieved specific resistance filtration and sludge cake water content of 2.52 × 1012 m/kg and 66.54 %. Cellular structure and extracellular polymeric substances (EPS) were disrupted, releasing partially bound water and destroying hydrophilic structures to facilitate sludge flocs aggregation, which was attributed to the oxidation of hydroxyl radicals. The consistent electron supply supplied by MFCⓅEFs and catalytically active sites on the surface of the multifunctional functional group electrode was responsible for producing more hydroxyl radicals and possessing a better oxidizing ability. The study provided an innovative process for sludge dewaterability improvement with high efficiency and low energy consumption, which presented new insights into the green treatment of sludge.
摘要：
贯穿于污泥处理处置的全过程,探索稳定高效的污泥脱水技术至关重要，这可以促进后续的资源利用以及空间和成本的节省。传统的Fenton氧化对提高污泥脱水性能,这受到额外的能量输入以及Fe2和H2O2的不稳定性的限制。为了减少能源和化学品的消耗，进一步打破铁循环的限速步骤，成功证明了一种新颖可行的方法，该方法利用铁氧体和生物炭电极（MgFe2O4@BC/CF）构建了微生物燃料电池供电的电Fenton系统（MFEFs）。具有MgFe2O4@BC/CF电极的MFCtEF实现了比电阻过滤，污泥滤饼含水量为2.52×1012m/kg和66.54％。细胞结构和细胞外聚合物（EPS）被破坏，释放部分结合水并破坏亲水结构，以促进污泥絮凝物的聚集，这归因于羟基自由基的氧化。由MFC〜EF提供的一致的电子供应和多功能官能团电极表面上的催化活性位点负责产生更多的羟基自由基并具有更好的氧化能力。该研究为提高污泥脱水性能提供了一种高效、低能耗的创新工艺,这对污泥的绿色处理提出了新的见解。
