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以除硫硝化微生物燃料电池(Microbial Fuel Cell,MFC)处理含S~(2-)/NH_4~+的模拟无机废水,研究了不同进水S~(2-)浓度下MFC的产电性能、污染物去除效果和阳极室硫累积情况.结果表明,除硫硝化MFC可实现同步阳极除硫和阴极硝化,并通过非生物电化学作用和生物电化学作用共同产电.进水S~(2-)浓度为(60.8±2.9)、(131.7±2.4)、(161.7±4.5)和(198.1±3.1)mg·L~(-1)时,最佳阳极碳刷清洗周期分别为3、3、3、4个换水周期,前3个进水浓度下的换水周期可分别缩短为6、8和8 h.MFC阴极硝化完全,不受进水S~(2-)浓度影响,但氧从阴极向阳极的渗漏导致阳极库仑效率较低(<40%).适当增加进水S~(2-)浓度可增强MFC的产电性能并提高S~(2-)去除负荷和颗粒硫累积比.除硫硝化MFC适宜的进水S~(2-)浓度为(161.7±4.5)mg·L~(-1),相应的最大功率密度为5.77 W·m~(-3),周期产电量为(141.0±5.2)C,S~(2-)去除负荷为(0.31±0.00)g·L~(-1)·d~(-1),颗粒硫累积比达58%.阳极碳纤维丝上沉积有粒径约100 nm的颗粒硫.阳极悬浮物与沉积物相比,悬浮物中S0含量比例较高,而S6+含量比例较低.
The simulated inorganic wastewater containing S ~ (2 -) / NH_4 ~ + was treated with Microbial Fuel Cell (MFC) to study the electric power generation performance of MFC under different influent S ~ (2-) The removal efficiency of pollutants and the accumulation of sulfur in the anode chamber were studied.The results showed that the sulfur removal nitrification MFC could achieve synchronous anode desulfurization and cathode nitrification and co-produce electricity through non-biological electrochemical action and bioelectrochemical action. The best anode carbon brush cleaning cycles were 3, 3, and 3, respectively, when the concentration was 60.8 ± 2.9, 131.7 ± 2.4, 161.7 ± 4.5 and 198.1 ± 3.1 mg · L -1, respectively. 3 and 4 water exchange cycles, the water exchange cycles of the first 3 influent concentrations can be shortened to 6, 8 and 8 h, respectively.MFC cathodic nitrification is complete and not affected by the influent S 2 - concentration, but oxygen Leakage from the cathode to the anode leads to a low Coulombic efficiency (<40%). Appropriately increasing the concentration of S 2 (2) in the influent can enhance the power generation performance of MFC and increase the S 2 removal load and particle sulfur The optimum concentration of S ~ (2-) was 174.7 ± 4.5 mg · L -1, and the corresponding maximum power density was 5.77 W · m -3. The cycle The electricity production was (141.0 ± 5.2) C, the removal load of S ~ (2-) was (0.31 ± 0.00) g · L -1 · d ~ (- 1), the cumulative sulfur content of the particles was 58% .Analyzed particle size about 100 nm was deposited on the anode carbon fiber filaments. Compared with the sediments, the content of S0 in the suspension was higher and the content of S6 + was lower .