Department of Biosciences and Health Sciences, Faculty of Biosciences and Medical Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
Biotechnology Research Laboratory, Faculty of Chemical Engineering, Babol Noshirvani University of Technology, Babol, 47148-71167, Iran.
Environ Sci Pollut Res Int. 2017 Aug;24(23):19444-19457. doi: 10.1007/s11356-017-9204-1. Epub 2017 Jun 3.
This work studied the performance of a laboratory-scale microbial fuel cell (MFC) using a bioanode that consisted of treated clinoptilolite fine powder coated onto graphite felt (TC-MGF). The results were compared with another similar MFC that used a bare graphite felt (BGF) bioanode. The anode surfaces provided active sites for the adhesion of the bacterial consortium (NAR-2) and the biodegradation of mono azo dye C.I. Acid Red 27. As a result, bioelectricity was generated in both MFCs. A 98% decolourisation rate was achieved using the TC-MGF bioanode under a fed-batch operation mode. Maximum power densities for BGF and TC-MGF bioanodes were 458.8 ± 5.0 and 940.3 ± 4.2 mW m, respectively. GC-MS analyses showed that the dye was readily degraded in the presence of the TC-MGF bioanode. The MFC using the TC-MGF bioanode showed a stable biofilm with no biomass leached out for more than 300 h operation. In general, MFC performance was substantially improved by the fabricated TC-MGF bioanode. It was also found that the TC-MGF bioanode with the stable biofilm presented the nature of exopolysaccharide (EPS) structure, which is suitable for the biodegradation of the azo dye. In fact, the EPS facilitated the shuttling of electrons to the bioanode for the generation of bioelectricity.
本工作研究了使用由涂覆在石墨毡上的处理斜发沸石细粉组成的生物阳极的实验室规模微生物燃料电池（MFC）的性能。将结果与使用裸露石墨毡（BGF）生物阳极的另一个类似 MFC 进行了比较。阳极表面为细菌群落（NAR-2）的附着和单偶氮染料 C.I.酸性红 27 的生物降解提供了活性位点。结果，两个 MFC 都产生了生物电能。在分批进料操作模式下，TC-MGF 生物阳极可实现 98%的脱色率。BGF 和 TC-MGF 生物阳极的最大功率密度分别为 458.8±5.0 和 940.3±4.2 mW m。GC-MS 分析表明，在 TC-MGF 生物阳极存在的情况下，染料很容易降解。使用 TC-MGF 生物阳极的 MFC 显示出稳定的生物膜，在 300 小时以上的运行过程中没有生物量浸出。总的来说，通过制备的 TC-MGF 生物阳极，MFC 的性能得到了显著提高。还发现，具有稳定生物膜的 TC-MGF 生物阳极具有胞外多糖（EPS）结构的性质，适合偶氮染料的生物降解。事实上，EPS 促进了电子向生物阳极的转移，从而产生生物电能。
