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An Innovative Application of Osmotic Microbial Fuel Cell (OsMFC) for Enhanced Activated Sludge Thickening and Stabilization with Bioelectricity Generation
Water Research ( IF 11.4 ) Pub Date : 2025-01-25 , DOI: 10.1016/j.watres.2025.123199
Wenchao Xue, Aye Pyae Pyae Aung, Simon Guerrero-Cruz, Kang Xiao, Yifan He, Anil Kumar Anal, Allan Sriratana Tabucanon

Waste activated sludge (WAS) management presents significant challenges due to its complex composition and the high cost associated with conventional treatment methods. This study investigates the potential of osmotic microbial fuel cell (OsMFC) technology for WAS thickening, stabilization, and bioelectricity generation. Compared to conventional microbial fuel cells (MFCs), OsMFCs offer several advantages, including enhanced sludge thickening performance, improved organic matter degradation efficiency, and increased bioelectricity generation. The OsMFC achieved substantial sludge thickening, with the total suspended solids (TSS) increasing from 1,753, 11,650, and 3,565 mg/L in the OsMFC to 28,550, 28,500, and 20,340 mg/L, respectively, over three consecutive operating cycles with a sludge retention time of 16 days. The total chemical oxygen demand (tCOD) mass reduction in the OsMFC averaged 90.7%, outperforming the MFC, which achieved 61.3%. This indicates the superior performance of the OsMFC in organic sludge digestion. Further supporting this, the VSS/TSS ratio of treated WAS was effectively reduced from 0.64 to 0.37, with an average VSS mass reduction of 65.0% obtained in the OsMFC. Additionally, OsMFC treatment modified the physicochemical properties of the WAS, resulting in smaller floc particle size, and reduced zeta potential, potentially enhancing sludge dewaterability. Furthermore, OsMFC exhibited superior bioelectricity generation compared to MFC, with maximum power densities averaging 1,704.6 mW/m3, outperforming that of 762.3 mW/m3 observed in comparing MFC. Despite its promising potential, further research is needed to optimize OsMFC operation and fully understand its mechanisms. Overall, this study highlights the potential of OsMFC technology for sustainable and efficient management of WAS within the circular economy framework.

中文翻译:


渗透微生物燃料电池 (OsMFC) 的创新应用,通过生物发电增强活性污泥的浓缩和稳定



废弃活性污泥 (WAS) 管理因其成分复杂且与传统处理方法相关的高成本而面临重大挑战。本研究调查了渗透微生物燃料电池 (OsMFC) 技术在 WAS 增稠、稳定和生物发电方面的潜力。与传统的微生物燃料电池 (MFC) 相比,OsMFC 具有多项优势,包括增强污泥浓缩性能、提高有机物降解效率和增加生物发电。OsMFC 实现了大量的污泥浓缩,总悬浮物 (TSS) 从 OsMFC 的 1,753、11,650 和 3,565 mg/L 分别增加到 28,550、28,500 和 20,340 mg/L,连续三个运行周期,污泥停留时间为 16 天。OsMFC 的总化学需氧量 (tCOD) 质量平均减少 90.7%,优于 MFC 的 61.3%。这表明 OsMFC 在有机污泥消化中的卓越性能。进一步支持这一点的是,处理后的 WAS 的 VSS/TSS 比率从 0.64 有效降低到 0.37,在 OsMFC 中平均 VSS 质量减少 65.0%。此外,OsMFC 处理改变了 WAS 的物理化学性质,导致絮凝体粒径更小,Zeta 电位降低,从而可能增强污泥脱水能力。此外,与 MFC 相比,OsMFC 表现出卓越的生物发电能力,最大功率密度平均为 1,704.6 mW/m3,优于在比较 MFC 中观察到的 762.3 mW/m3。尽管 OsMFC 的潜力前景广阔,但仍需要进一步的研究来优化 OsMFC 操作并充分了解其机制。 总体而言,本研究强调了 OsMFC 技术在循环经济框架内可持续和高效管理 WAS 的潜力。
更新日期:2025-01-25
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