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Metabolism of Chemolithotrophs01:15

Metabolism of Chemolithotrophs

48
Chemolithotrophs are microorganisms that obtain energy by oxidizing inorganic molecules such as hydrogen gas (H₂), ammonia (NH₃), reduced sulfur compounds (H₂S, S²⁻), and ferrous iron (Fe²⁺). Unlike heterotrophic organisms that rely on organic carbon, chemolithotrophs transfer electrons from these inorganic donors to the electron transport chain (ETC), generating a proton motive force (PMF) that drives ATP synthesis through oxidative phosphorylation.
48

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A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
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同时的部分化,脱化和去除在连续批量反应堆中通过受控的减少空气和短时间的污泥保留时间减少.

Yahong Luo1, Kui Yi1, Xinyu Zhang1

  • 1School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang, 453007, People's Republic of China.

Journal of environmental management
|July 22, 2023
PubMed
概括
此摘要是机器生成的。

这项研究优化了废水处理,通过在测序批量反应堆中增强和的去除,即使在有限的碳来源下,也实现了高的去除效率. 反应堆R-2表现出卓越的性能,减少了对外部碳添加的需求.

关键词:
有氧化脱化是有氧化脱的过程.氨氧化细菌是一种氧化氨的细菌.内源性脱化是一种内源性脱化.低碳/低废水的废水.部分化 部分化积累生物体的积生物体

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科学领域:

  • 环境工程 环境工程
  • 废水处理 废水处理
  • 微生物生态学 微生物生态学

背景情况:

  • 废水中同时进行碳 (C), (N) 和 (P) 的生物处理,由于废水碳来源不足而受到阻碍.
  • 低C/N比率 (≤4) 在传统系统中对有效的营养去除构成重大挑战.

研究的目的:

  • 调查不同部分化启动策略在低C/N废水无氧/有氧测序批量反应堆 (R-1和R-2) 的有效性.
  • 为了评估受控减少通风和减少污泥保留时间对营养去除效率的影响.
  • 在不同的运行条件下比较两个反应堆的性能,以提高营养物质的去除和减少碳需求.

主要方法:

  • 两个平行无氧/有氧测序批量反应堆 (R-1和R-2) 用低C/N废水运行.
  • 采用了不同的部分化启动策略,以及控制的减少通风和减少污泥保留时间.
  • 使用先进的分析技术来测量NH4+-N,总 (TN),PO43--P和CODintra的去除效率,并描述微生物结构和营养物质去除途径.

主要成果:

  • 这两个反应堆都实现了先进的去除效率:NH4+-N (≥96%),TN (≥86%),PO43--P (≥95%),和CODintra (≥91%).
  • 反应堆R-2彻底消除了氧化酸盐的细菌,呈现出更高的酸盐积累 (近100%),更高的TN (121.1±0.7毫克TN/gVSS·d) 和P (12.5±0.6毫克PO43--P/gVSS·d) 清除负载.
  • 确定了不同的微生物群落和营养物质去除途径:R-1通过部分化-内源性化利用化糖原积聚生物和PAO;R-2通过部分化-有氧化化利用有氧性化细菌和PAO.

结论:

  • 优化的部分化策略,控制的通风和污泥保留时间有效地提高了从低C/N废水中同时去除和的效果.
  • 反应堆R-2在营养物质去除负载和酸盐积累方面表现出卓越的性能,这表明该过程更有效率.
  • 研究结果表明,R-2方法提供了更高的效率,方便性和降低废水处理中的外部碳来源需求的潜力.