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首页> 外文期刊>Biotechnology Progress >Characteristics of a Methanotrophic Culture in a Membrane-Aerated Biofilm Reactor
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Characteristics of a Methanotrophic Culture in a Membrane-Aerated Biofilm Reactor

机译：膜曝气生物膜反应器中甲烷营养培养的特征

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The membrane-aerated biofilm reactor (MABR)shows considerable potential as a bioprocess that can exploit methanotrophic biodegradation and offers several advantages over both conventional biofilm reactors and suspended-cell processes.This work seeks primarily to investigate the oxidation efficiency in a methanotrophic MABR.A mixed methanotrophic biofilm was immobilized on an oxygen-permeable silicone membrane in a single tube hollow fiber configuration.Under the conditions used the maximum oxygen uptake rate reached values of 16 g/m~2(centre dot)d,and the rate of biofilm growth achieved was 300 mum/d.Both indicators reflect a very high metabolic rate.It was shown that the biofilm was predominantly in a dual-substrate limitation regime but below about 250 mum was fully penetrated by both substrates.Oxygen limitation was not observed.Analysis indicated that microbial activity stratification was evident and the location of stratified layers of oxygen-consuming components of the consortium could be manipulated via the intramembrane oxygen pressure.The results confirm that an MABR can be employed to minimize substrate diffusion limitations in thick biofilms.
机译：膜曝气生物膜反应器（MABR）作为一种可以利用甲烷营养生物降解的生物工艺显示出巨大的潜力，并且与常规生物膜反应器和悬浮细胞工艺相比均具有许多优势，这项工作主要旨在研究甲烷营养生物MABR中的氧化效率。混合甲烷营养生物膜以单管中空纤维的形式固定在透氧有机硅膜上。在所用条件下，最大摄氧速率达到16 g / m〜2（中心点）d，生物膜的生长速率达到300 mum / d，这两个指标均反映了很高的新陈代谢率，表明生物膜主要在双重底物限制条件下起作用，但在大约250 mum以下都被两种底物完全渗透，没有观察到氧气限制。表明微生物活性分层是明显的，并且财团的耗氧成分的分层层的位置结果证实，MABR可以用来最小化厚生物膜中底物的扩散限制。

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