【摘要】 微生物作为微生物电解池(microbial electrolysis cells,MECs)内污染物被生物催化氧化的重要组成部分,研究MECs阳极生物膜的群落结构对于提高系统的性能具有重要意义,尤其是群落内的特殊功能菌群,如产电菌、产氢菌、产甲烷菌、抗生素耐药菌等。本文研究驯化了4类MECs,分别为不加任何药剂(MEC)、加甲烷抑制剂(B-MEC)、加磺胺甲噁唑(S-MEC)、加甲烷抑制剂和磺胺甲噁唑的混合物(BS-MEC),对不同功能菌的物种和群落结构变化进行分析。研究显示,4类微生物电解池系统内保留有相当丰度的产电菌(3.97%~5.51%)、产氢菌(0.77%~1.35%),这些菌群保证了系统的高效运行,此外微生物中出现了大量的抗生素抗性菌(2.67%~4.33%),研究结果表明微生物群落能够在有抗生素存在的环境下生存,并且能够为微生物降解抗生素提供支持。更多还原

【Abstract】 Microorganisms are important components of microbial electrolytic cells. It is important to study the community structure of the anode biofilm in the microbial electrolysis cell for the performance improvement, especially the special functional flora, such as exoelectrogen, hydrogen bacteria, methanogen and antibiotic resistant bacteria. Four kinds of MECs have been studied in this paper: MECs without chemical medicine(MECs), MECs with methane inhibitors(B-MEC), MECs with sulfamethoxazole(S-MECs), and MECs with a mixture of sulfamethoxazole and methane inhibitors(BS-MECs). The variation of species and community structure of different functional bacteria were analyzed. The results showed that microbial electrolysis cell system contained abundance exoeletrogens(3.97% — 5.51%) and hydrogenogens(0.77% — 1.35%). These bacteria groups guaranteed the efficient operation of the electrochemical system. In addition, a large number of antibiotic resistant bacteria appeared(2.67%—4.33%). The studies have shown that microbial communities could survive in the presence of antibiotic and they are essential to the microbial degradation of antibiotics.更多还原