Simultaneous nitrification, denitrification and carbon removal in microbial fuel cells.
Simultaneous nitrification, denitrification and carbon removal in microbial fuel cells.
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DOI：
10.1016/j.watres.2010.02.022
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发表时间：
2010-05
期刊：
影响因子：
12.8
通讯作者：
Bernardino Virdis;K. Rabaey;R. Rozendal;Zhiguo Yuan;J. Keller
中科院分区：
文献类型：
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作者：
Bernardino Virdis;K. Rabaey;R. Rozendal;Zhiguo Yuan;J. Keller
微生物燃料电池（mfc）可以使用硝酸盐作为阴极电子受体，允许同时去除碳（阳极）和氮（阴极）。在本研究中，我们通过特定曝气在阴极过程中补充原位硝化，从而在一个半电池中获得同时硝化和反硝化（SND）。向阳极供应含乙酸铵的合成废水；流出物随后被引导到阴极。研究了氧浓度、碳氮浓度和碳氮比对系统性能的影响。反硝化与阴极硝化同时发生，产生的出水硝酸盐和铵含量分别低至1.0±0.5mgNL−1和2.13±0.05mgNL−1，氮去除效率为94.1±0.9%。将硝化过程集成到阴极中，解决了由于MFC中隔间之间扩散而导致铵损失的缺点，如先前报道的在外部硝化阶段运行的系统中所述。这项工作首次成功地将SND和有机氧化结合起来，同时在MFC中发电。
Microbial fuel cells (MFCs) can use nitrate as a cathodic electron acceptor, allowing for simultaneous removal of carbon (at the anode) and nitrogen (at the cathode). In this study, we supplemented the cathodic process with in situ nitrification through specific aeration, and thus obtained simultaneous nitrification and denitrification (SND) in the one half-cell. Synthetic wastewater containing acetate and ammonium was supplied to the anode; the effluent was subsequently directed to the cathode. The influence of oxygen levels and carbon/nitrogen concentrations and ratios on the system performances was investigated. Denitrification occurred simultaneously with nitrification at the cathode, producing an effluent with levels of nitrate and ammonium as low as 1.0±0.5mgNL−1and 2.13±0.05mgNL−1, respectively, resulting in a nitrogen removal efficiency of 94.1±0.9%. The integration of the nitrification process into the cathode solves the drawback of ammonium losses due to diffusion between compartments in the MFC, as previously reported in a system operating with external nitrification stage. This work represents the first successful attempt to combine SND and organics oxidation while producing electricity in an MFC.