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首页> 外文期刊>Applied Microbiology and Biotechnology >Hematite and multi-walled carbon nanotubes stimulate a faster syntrophic pathway during methanogenic beet sugar industrial wastewater degradation
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Hematite and multi-walled carbon nanotubes stimulate a faster syntrophic pathway during methanogenic beet sugar industrial wastewater degradation

机译：赤铁矿和多壁碳纳米管在甲状腺甜菜糖工业废水降解过程中刺激了更快的同步途径

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The quest to understand and subsequently improve the role played by bacteria and archaea in the degradation of organic matter both in natural and engineered anaerobic ecosystems has intensified the utilization of nanoparticles. Microbial communities are known to syntrophically cooperate during the anaerobic conversion of substrates into methane gas via the direct exchange of electrons. In this study, the role of hematite (Fe2O3-750 mg/L) and multi-walled carbon nanotubes (MWCNTs-1500 mg/L) during the degradation of beet sugar industrial wastewater (BSIW) in a batch experiment was investigated. Hematite and MWCNTs enhanced methane gas generation by 35 and 20%, respectively. Furthermore, microbial syntrophic communities might have exchanged metabolic electrons more directly, with hematite and MWCNTs serving as electron conduits between the homoacetogens and methanogens, thereby establishing a direct interspecies electron transfer (DIET) pathway. Additionally, hematite and MWCNTs enriched the bacteria Firmicutes while Chloroflexi reduced in abundance. Scanning electron microscopy and confocal laser scanning microscopy demonstrated that extracellular polymeric substances had noticeable interactions with both hematite and MWCNTs. Our findings provide vital information for more understanding of the response of microbes to hematite and MWCNTs in a complex natural environment.
机译：在天然和工程化的厌氧生态系统中，寻求理解和随后改善细菌和古痤疮在有机物的降解中的作用，它加剧了纳米颗粒的利用率。已知微生物群落通过直接电子交换在基材的厌氧转化为甲烷气体期间的微生物共合。在本研究中，研究了在批量实验中在甜菜糖工业废水（BSIW）降解过程中赤铁矿（Fe2O3-750mg / L）和多壁碳纳米管（MWCNTS-1500mg / L）的作用。赤铁矿和MWCNT分别增强35％和20％的甲烷气体产生。此外，微生物同步社区可能更直接地交换代谢电子，用赤铁矿和MWCNT作为同种丙酮和甲基甲烷之间的电子导管，从而建立直接的Interspecies电子转移（饮食）途径。此外，赤铁矿和MWCNTS富含细菌的核心，而Chloroflex在丰度中降低。扫描电子显微镜和共聚焦激光扫描显微镜证明，细胞外聚合物物质与赤铁矿和MWCNT具有显着的相互作用。我们的研究结果提供了更重要的信息，以便在复杂的自然环境中更了解微生物对赤铁矿和MWCNT的响应。

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