尺寸分离的anammox颗粒的特征变化和对这些演变的潜在影响的识别
Ruili Yang1, Yenan Li2, Jinglin Chen3
1CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Fujian, Xiamen, 361021, PR China; Yancheng Institute of Technology, Jiangsu, Yancheng, 224051, PR China.
Environmental research
|August 28, 2023
概括
无氧氨氧化 (anammox) 颗粒是废水中去除的关键. 颗粒大小影响性质,较大的颗粒由于化学沉和物种间相互作用等因素而表现出更高的活性.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 生物地质化学循环是什么
背景情况:
- 无氧氨氧化 (anammox) 颗粒化提高了废水中去除效率和系统稳定性.
- 了解颗粒大小对anammox工艺的影响对于优化废水处理至关重要.
- 颗粒化涉及微生物群落和物理化学因素之间的复杂相互作用.
研究的目的:
- 为了研究不同尺寸的anammox颗粒的物理,化学和微生物特性.
- 阐明驱动不同颗粒大小的颗粒形成的机制.
- 为了将颗粒特征与anammox活性和废水处理性能相关联.
主要方法:
- 将anammox颗粒分成小 (0.5-0.9毫米),中等 (1.8-2.2毫米) 和大 (2.8-3.5毫米) 的尺寸类别.
- 高通量测序用于微生物社区分析.
- 确定无机元素和细胞外聚合物质 (EPS).
- 微生物功能预测和测量特定的anammox活动.
主要成果:
- 中型颗粒呈现出最高的球状性和EPS含量;大型颗粒呈现出最高的特定表面积,生物多样性和特定的anammox活性.
- 确定了CaCO3和MgCO3沉物,在大颗粒中含有更高的无机含量.
- 微生物群落的结构和功能随着颗粒大小的变化而显著变化,在较大的颗粒中细菌线状细菌增加.
结论:
- 颗粒形成是由细胞生长,EPS分泌,化学沉和物种间相互作用驱动的,根据颗粒大小的不同贡献.
- 通过细胞生长和生物膜形成小颗粒;较大的颗粒涉及增加EPS和降水.
- 大颗粒受益于化学沉和协同的物种间相互作用,导致增强的anammox活动.
相关概念视频
01:15Metabolism of Chemolithotrophs
40
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.
40
01:27Cell Inclusions
40
Prokaryotic cells possess a variety of inclusions that play crucial roles in nutrient storage, metabolic processes, and environmental adaptation. These structures enable bacteria to thrive under fluctuating environmental conditions by storing essential resources and optimizing their metabolic efficiency.Carbon Storage: Poly-β-Hydroxybutyric Acid and Glycogen GranulesBacteria frequently store excess carbon in specialized granules. Poly-β-hydroxybutyric acid (PHB) granules are lipid...
40
01:16Precipitate Formation and Particle Size Control
813
In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
813