Low-strength ultrasonication positively affects methanogenic granules toward higher AD performance: Implications from microbial community shift.
Low-strength ultrasonication positively affects methanogenic granules toward higher AD performance: Implications from microbial community shift.
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低强度超声处理对产甲烷颗粒产生积极影响，使其具有更高的 AD 性能：微生物群落转变的影响。
DOI：
10.1016/j.ultsonch.2016.03.010
复制
发表时间：
2016
影响因子：
8.4
通讯作者：
Cho SK
中科院分区：
文献类型：
--
作者：
Cho SK
为阐明有机废物甲烷产率的提高，首次采用焦化测序法分析了低强度超声波对上流式厌氧污泥床反应器中微生物群落结构的影响。有趣的是，与对照相比，超声处理的颗粒中观察到了更均匀的微生物群落，这可以弥补丰富度的下降，从而产生可比的(古细菌)甚至更高的(细菌)多样性。经超声处理的颗粒含有较高水平的δ-变形杆菌，据报道其中许多是潜在的合成菌，以及产甲烷的甲烷属甲烷杆菌、甲氧托里斯和甲烷球菌。从氢通量的角度讨论了合养细菌及其产甲烷伙伴的增加；他们的选择性增殖似乎是提高厌氧性能的原因。这项研究首次揭示了低强度超声波使微生物结构向更好的产气性能转变的新功能，并将促进低强度超声波在其他生物过程中的应用。
To elucidate the enhanced methane yield from organic wastes, the effects of low-strength ultrasonication on the microbial community structures in upflow anaerobic sludge blanket reactors were for the first time analyzed using pyrosequencing. Interestingly, a more even microbial community was observed in the ultrasonicated granules than in the control, which could compensate for the decreased richness and resulted in comparable (archaea) or even higher (bacteria) diversity. The ultrasonicated granules contained higher levels of δ-Proteobacteria, of which many are reportedly potential syntrophs, as well as methanogenic generaMethanosaeta,Methanotorris, andMethanococcus. The increased presence of syntrophic bacteria with their methanogenic partners was discussed with respect to hydrogen flux; their selective proliferation seems to be responsible for the enhanced anaerobic performance. This study is the first research shedding light on the novel function of low-strength ultrasound shifting the microbial structure towards better biogas production performance, and will facilitate application of low-strength ultrasound to other bioprocesses.
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DOI：
--
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期刊：
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