CAJ | 학술논문

微生物燃料电池（microbial fuel cell, MFC）是一种将化学能转化为电能的技术。它可以利用包括河涌与海底的沉积物在内的众多基质来产生电能。在利用微生物燃料电池对沉积物进行修复时，通常采用将阳极埋在水底沉积物中，阴极悬于上覆水中的方式来构建电池。由于上覆水的存在，底泥中的污染物质不仅会被电池修复，也会向上覆水释放，影响底泥和上覆水的整体修复情况。以广州某黑臭河涌底泥为阳极微生物接种源及阳极基质，50 mM·L-1铁氰化钾缓冲溶液为阴极室溶液构建了双室有膜型微生物燃料电池，排除上覆水对微生物燃料电池修复底泥的影响，研究在不同的外接电阻下，MFC 的产电性能以及MFC对底泥的修复效果。结果表明：以黑臭河涌底泥为阳极底物能够保持MFC较长时间产电运行（650 h）。构建的电池内阻分别为：1341.6、1339.2、1330.2、1386.7和1311.7?。外阻能够对MFC的产电和功率密度输出产生影响：在外接电阻为1500?时，MFC获得的稳定输出电压最高为0.753 V，最大输出功率为4.94 mW·m-2。在运行中，微生物燃料电池对底泥进行了修复：在外接电阻为1500?时，有机质去除效果最佳，去除率为7.834%；全磷在外阻100?达到29.98%的最高去除率；铵态氮在外阻100?处达到41.64%的最高去除率；在硝态氮最高去除率则在外接1000?时，为71.52%。这说明了外阻能够影响电池对底泥的修复效果。
미생물연료전지（microbial fuel cell, MFC）시일충장화학능전화위전능적기술。타가이이용포괄하용여해저적침적물재내적음다기질래산생전능。재이용미생물연료전지대침적물진행수복시，통상채용장양겁매재수저침적물중，음겁현우상복수중적방식래구건전지。유우상복수적존재，저니중적오염물질불부회피전지수복，야회향상복수석방，영향저니화상복수적정체수복정황。이엄주모흑취하용저니위양겁미생물접충원급양겁기질，50 mM·L-1철청화갑완충용액위음겁실용액구건료쌍실유막형미생물연료전지，배제상복수대미생물연료전지수복저니적영향，연구재불동적외접전조하，MFC 적산전성능이급MFC대저니적수복효과。결과표명：이흑취하용저니위양겁저물능구보지MFC교장시간산전운행（650 h）。구건적전지내조분별위：1341.6、1339.2、1330.2、1386.7화1311.7?。외조능구대MFC적산전화공솔밀도수출산생영향：재외접전조위1500?시，MFC획득적은정수출전압최고위0.753 V，최대수출공솔위4.94 mW·m-2。재운행중，미생물연료전지대저니진행료수복：재외접전조위1500?시，유궤질거제효과최가，거제솔위7.834%；전린재외조100?체도29.98%적최고거제솔；안태담재외조100?처체도41.64%적최고거제솔；재초태담최고거제솔칙재외접1000?시，위71.52%。저설명료외조능구영향전지대저니적수복효과。
The microbial fuel cell (MFC) has been demonstrated to be a promising method for converting chemical energy into electrical energy. It can take advantage of many substrates to producing electricity, including sediments in river and sea. When MFC was used in sediment remediation, anode was usually buried in the bottom sediments and cathode suspended in overlying water. As a result of the existence of overlying water, pollutants in sediment not just repaired by MFC, it would also release into water and influenced the overall remediation of sediment and water. Here, we show the concept of a PEM MFC that occurs in separate anode and cathode chambers, with black smelly sediment as the anode microbial inoculum and fuel, 50 mM·L-1 K3[Fe(CN)6] as cathode buffer solution. MFCs ran under different external resistances, and the results included the electric producing of microbial fuel cells and degraded effects of sediment, excluding the influence of overlying water. The results showed that using black smelly sediment as anodic substrate could support the MFC for long-term operation (650 h). Internal resistances of battery were 1341.6, 1339.2, 1330.2, 1386.7 and 1311.7?. External resistances impacted the electricity generation and power density output. A stable highest voltage output of 0. 753 V appeared at the external resistor 1000? and a highest power density of 4.94 mW·m-2 were obtain at the external resistor 1500?. During the run time, black smelly sediment had repaired by MFC: the reduction of organic content in sediment was 7.834%. Highest reductions of total-P, ammonium nitrogen and nitrate nitrogen were 29.98%, 41.64% and 71.52%. They were appeared at the external resistor 100?, 100? and 1000?, respectively. This illustrated that the external resistance can affect the remediation of sediment in MFC.