数字农科院2.0

Resilience of electroactive pollutant removal and power generation to long-term temperature shifts in domestic wastewater treatment during the autumn-winter-spring period

文献类型： 外文期刊

作者： Xiong, Xia;Yang, Nuan;Liu, Ming;Jiang, Xiaomei;Luo, Di;Lei, Yunhui

作者机构：

关键词： Long-term;Temperature fluctuations;Microbial fuel cells;Power generation;Pollutant removal;Domestic wastewater

期刊名称： JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

ISSN： 2213-2929

年卷期： 2025 年 13 卷 4 期

页码：

收录情况： SCIE（2025版） ; ; EI（2025版）

摘要： Microbial fuel cells (MFCs) possess considerable potential for facilitating sustainable wastewater treatment. However, low-temperature can influence the stability of MFC-based wastewater treatment process. This study investigates the resilience of pollutant removal and power generation in real wastewater treatment using air-cathode (AC) MFCs under long-term seasonal temperature shifts. In the autumn Phase 1, chemical oxygen demand (COD) removal remained stable as temperatures dropped from 20 degrees C to 15 degrees C. In contrast, removal efficiencies of ammonia and total nitrogen (TN), as well as power density, experienced significant declines. At temperatures below 15 degrees C (winter, Phase 2), both nitrogen removal efficiency and power output were significantly reduced. Once temperatures rose from 10 degrees C to 31 degrees C (spring, Phase 3), there was remarkable enhancement in both pollutant removal and power generation. The maximum removal efficiencies of COD, ammonia and TN were approx. 85 %-99 %, 92 %-99 %, and 80 %-95 %, respectively. Power recovery, characterized by power densities ranging from 420 mW/m3 to 880 mW/m3, exhibited coulombic efficiencies between 12 % and 25 %, with current outputs varying from 0.4 mA to 1.2 mA. Nonlinear fitting analysis showed that temperature fluctuations strongly affect nitrogen removal but have weaker impacts on organic removal and electricity generation. Unclassified_f__Xanthomonadeceae (1.2 %-25.6 %), Pseudoxanthomonas (0.1 %-8.2 %), Pseudomonas (0.2 %- 3.1 %), and Thauera (0.6 %-2.7 %) were identified as key psychrotolerant microbial contributors. This helped enrich functional electrode biofilms, maintain enhanced nitrification and denitrification (SND) reactions, and ensure stable performance despite temperature shifts. This study would deepen our understanding of the low-temperature resilience in MFC-based wastewater treatment, thereby promoting its practical application.

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