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Bacterial Community Structure of a Lab-Scale Anammox Membrane Bioreactor

机译：实验室规模的厌氧氨氧化膜生物反应器的细菌群落结构

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Autotrophic nitrogen removal technologies have proliferated through the last decade. Among these, a promising one is the membrane bioreactor (MBR) Anammox, which can achieve very high solids retention time and therefore sets a proper environment for the cultivation of anammox bacteria. In this sense, the MBR Anammox is an efficient technology for the treatment of effluents with low organic carbon and high ammonium concentrations once it has been treated under partial nitrification systems. A lab-scale MBR Anammox bioreactor has been built at the Technological University of Delft, The Netherlands and has been proven for efficient nitrogen removal and efficient cultivation of anammox bacteria. In this study, next-generation sequencing techniques have been used for the investigation of the bacterial communities of this MBR Anammox for the first time ever. A strong domination of Candidatus Brocadia bacterium and also the presence of a myriad of other microorganisms that have adapted to this environment were detected, suggesting that the MBR Anammox bioreactor might have a more complex microbial ecosystem that it has been thought. Among these, nitrate-reducing heterotrophs and primary producers, among others, were identified. Definition of the ecological roles of the OTUs identified through metagenomic analysis was discussed. (c) 2014 American Institute of Chemical Engineers Biotechnol. Prog., 31:186-193, 2015
机译：自养脱氮技术在过去十年中得到了广泛应用。其中，有前途的是膜生物反应器（MBR）厌氧氨氧化膜，它可以实现很高的固体保留时间，因此为厌氧氨氧化菌的培养提供了合适的环境。从这个意义上讲，MBR厌氧氨氧化技术是一种经过部分硝化系统处理的有机物含量低，有机碳含量低的废水的有效技术。荷兰代尔夫特科技大学已建造了实验室规模的MBR厌氧氨氧化生物反应器，并已被证明可有效去除氮和厌氧氨氧化细菌的高效培养。在这项研究中，新一代测序技术首次用于这种MBR Anammox细菌群落的研究。检测到强烈的念珠菌支配地位，并且还检测到多种其他微生物已经适应了这种环境，这表明MBR厌氧氨氧化生物反应器可能具有人们认为更为复杂的微生物生态系统。其中，确定了减少硝酸盐的异养生物和初级生产者。讨论了通过宏基因组分析确定的OTU的生态作用的定义。 （c）2014美国化学工程师学会生物技术学会。 Prog。，31：186-193，2015

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