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Yutong Liu, Cong Chen, Xing Xue, Kun Tang +4
This study demonstrates the feasibility of two-chamber microbial fuel cells (MFCs) for treating tobacco wastewater while generating electricity. Using wastewater from papermaking-reconstituted tobacco sheet production as inoculum, the authors investigated the effects of external resistance and supplementary carbon sources (glucose, acetate, propionate, butyrate) on power generation and pollutant removal. Maximum COD removal reached 75.97%, with power density of 717.04 mW/m² achieved using glucose. Microbial community analysis revealed Trichococcus and Acinetobacter as dominant genera, potentially serving novel roles in electricity generation.
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The tobacco production process generates a substantial amount of wastewater characterized by high organics and low biodegradability, which poses a significant risk of severe environmental pollution. In order to explore a clean and low-cost technology for tobacco wastewater treatment, this study constructed two-chamber MFCs and investigated the performance of tobacco wastewater treatment and electricity generation capacity at room temperature. The incorporation of carbon sources (e.g., glucose, acetate, propionate, and butyrate) in wastewater could enhance the removal of COD, total nitrogen and ammonia nitrogen in wastewater. After three cycles, the maximum COD removal rate reached 75.97 ± 1.49%, while the maximum total nitrogen removal and ammonia nitrogen removal rates were 46.95 ± 1.77% and 48.31 ± 1.16%, respectively. Meanwhile, the maximum voltage output of 0.67 V was observed, and the maximum power density was 717.04 mW/m2. The microbial community analysis revealed that Trichococcus and Acinetobacter were present in high abundance in MFCs, which may play a significant role in electricity generation and wastewater treatment. These results demonstrate that MFC is applicable for tobacco wastewater treatment, providing both theoretical foundation and technical references for the large-scale practical application of MFC technology in tobacco wastewater treatment.