相关实验视频
Updated: Sep 9, 2025

05:10
A Microfluidic Platform to Study Bioclogging in Porous Media
Published on: October 13, 2022
2.1K
膜过降低了饮用水系统中的营养物质可用性和侵入潜力,而不会影响成熟的生物膜
Thomas Pluym1,2, Fien Waegenaar1,2, Karlien Dejaeger2,3
1Center for Microbial Ecology and Technology (CMET), Department of Biotechnology, Ghent University, Ghent, Belgium.
Frontiers in microbiology
|August 29, 2025
概括
超过 (UF) 和纳米过 (NF) 减少饮用水中的有机碳,提高生物稳定性. NF表现出优异的TOC去除,导致不同的微生物群落和引入的微生物的衰变率增加.
科学领域:
- 环境科学
- 微生物学
- 水处理工程
背景情况:
- 生物稳定的饮用水至关重要,特别是在度最小的系统中.
- 分布系统中的微生物再生通过限制总有机碳 (TOC) 等营养物质来管理.
研究的目的:
- 评估超过 (UF) 和纳米过 (NF) 在减少 TOC 的有效性.
- 在试点配送系统中调查UF和NF对饮用水微生物学和生物稳定性的影响.
主要方法:
- 试验规模的饮用水分配系统模拟非化条件.
- 使用UF和NF膜进行TOC去除的评估.
- 通过高性能尺寸排除色谱和微生物概况分析大量水和生物膜细菌群落.
- 侵袭测试以确定引入的微生物的衰变速率.
主要成果:
- NF的TOC去除率明显高 (75.4%),而非UF (25.4%).
- NF和UF处理导致散装水中的细菌群体组成不同,NF显示出最大的分歧.
- 尽管水处理方法发生了变化,但成熟的生物膜社区仍然稳定.
- 导入的微生物的衰变速度随着TOC含量的降低而增加,这表明膜处理水中的生物稳定性得到了提高.
结论:
- 在减少TOC和改变饮用水微生物群落方面,NF和UF是有效的.
- 用膜处理的水表现出增强的生物稳定性,不需要的微生物的衰变率更高.
- 生物膜群体表现出对营养水平和水处理变化的弹性.
相关概念视频
Biofilms
271
Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
271
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
218
Radiation and filtration are essential tools for microbial control, targeting microorganisms through distinct mechanisms. Radiation eliminates microbes by damaging their DNA, either killing them or inhibiting their growth. Based on wavelength, radiation is classified into two types: nonionizing and ionizing radiation.Non-ionizing radiation, such as UV radiation (200–400 nm), is absorbed by DNA, causing defects that effectively disinfect surfaces, air, and water, including safety cabinets.
218
Factors Influencing Microbial Growth: Osmolarity
113
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...
113

