An innovative application of osmotic microbial fuel cell (OsMFC) for enhanced activated sludge thickening and stabilization with bioelectricity generation.

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Tác giả: Anil Kumar Anal, Aye Pyae Pyae Aung, Simon Guerrero-Cruz, Yifan He, Allan Sriratana Tabucanon, Kang Xiao, Wenchao Xue

Ngôn ngữ: eng

Ký hiệu phân loại:

Thông tin xuất bản: England : Water research , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 731062

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/m
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