不同生物过滤器微生物群落对溶解有机物复合组分的差异利用

IF 2.1 4区 环境科学与生态学 Q2 ENGINEERING, CIVIL
Marta Vignola, Jeanine Lenselink, Dominic Quinn, U. Ijaz, Ryan Pereira, William T. Sloan, S. Connelly, Graeme Moore, Caroline Gauchotte-Lindsay, Cindy J. Smith
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引用次数: 0

摘要

溶解有机物(DOM)是存在于天然水生系统中的碳基化合物的复杂混合物,对饮用水处理过程具有重要影响。生物过滤,利用多孔介质的生物活性床,为控制生物可利用的DOM提供了一种低能量和低化学的解决方案。然而,微生物群落组成对生物过滤器中DOM降解的影响仍然知之甚少。本研究旨在探讨生物过滤器顶部、中部和底部(top、MID和BOT)微生物群落对DOM的处理能力。DOM的生长速率不同,实验结束时底层群落的细胞丰度最高(1.83 × 106±9 × 103;2.06 × 106±1 × 104;TOP、MID、BOT分别为2.15 × 106±7 × 103个细胞/mL)。这三个社区对使用特定的DOM部分表现出不同的偏好,底层社区针对的是更复杂的部分。生物过滤器底部的微生物群落具有较高的Curvibacter属相对丰度,表明它可能在降解复杂DOM馏分中发挥关键作用。这些发现强调了微生物群落组成对生物过滤器中DOM降解的影响,为优化其性能提供了有价值的见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Differential utilisation of dissolved organic matter compound fractions by different biofilter microbial communities
Dissolved organic matter (DOM) is a complex mixture of carbon-based compounds present in natural aquatic systems, which significantly affects drinking water treatment processes. Biofiltration, utilising biologically active beds of porous medium, offers a low-energy and low-chemical solution for controlling bioavailable DOM. However, the impact of microbial community composition on DOM degradation in biofilters remains poorly understood. This study aimed to explore the abilities of microbial communities from the top, middle, and bottom (TOP, MID, and BOT) of a biofilter to process DOM. We showed varying growth rates on the DOM, with bottom community exhibiting the highest cell abundance at the end of the experiment (1.83 × 106 ± 9 × 103; 2.06 × 106 ± 1 × 104; 2.15 × 106 ± 7 × 103 cells/mL for the TOP, MID, and BOT, respectively). The three communities showed different preferences for utilising specific DOM fractions, with the bottom community targeting more complex ones. The microbial communities from the bottom of the biofilter had a higher relative abundance of the Curvibacter genus, suggesting it could play a crucial role in degrading complex DOM fractions. These findings highlight the influence of microbial community composition on DOM degradation in biofilters, providing valuable insights for optimising their performance.
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来源期刊
CiteScore
4.10
自引率
21.10%
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