无氧混生物膜反应器中的Anammox过程与柱状包装:流场和微生物社区的特性
Xian Wang1, Tao Wang1, Hao Meng1
1Department of Environmental Engineering, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin, 300401, PR China.
Chemosphere
|March 24, 2024
概括
使用复合包装的新型无氧混生物膜反应器 (ABBR) 显著增强了anammox细菌的丰富性. 这提高了去除效率,并缩短了废水处理的启动时间.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 废水处理工程 废水处理工程
背景情况:
- 有效丰富anammox细菌对于anammox过程至关重要.
- 传统的无氧混反应堆 (ABR) 在基质转移和死区方面存在局限性.
研究的目的:
- 开发和评估一种新的无氧混生物膜反应器 (ABBR),用于增强 anammox 细菌的丰富.
- 为了比较ABBR内两种不同的柱状包装类型在微生物社区和去除方面的性能.
主要方法:
- 两个ABBR的构造具有不同的柱状包装:单形蜂巢 (包装1) 和模块化复合材料 (包装2).
- 对流场的分析,以评估基质转移效率.
- 随着时间的推移,对微生物群落和去除性能进行监测.
主要成果:
- 使用模块化复合材料包装 (包装2) 的ABBR显示,anammox的启动时间缩短了21.28%.
- 包装2导致95%更高的anammox细菌细胞密度和更多样化的微生物群落 (四个属与一个).
- 带有包装2的ABBR在高负载率下保持了稳定的去除.
结论:
- 模块化复合材料包装显著提高了ABBR中的anammox细菌的丰富和保留.
- 开发的ABBR显示了快速丰富anammox细菌和推进anammox工艺技术的巨大潜力.
- 这种方法在废水处理中提供了更好的去除性能.
相关概念视频
01:27The Winogradsky Column
A Winogradsky column provides a powerful tool for studying microbial ecology and metabolic interactions in a stratified, self-contained environment. This artificial ecosystem, developed by Sergei Winogradsky in the late 19th century, replicates the complex biogeochemical gradients found in natural sediments, allowing researchers to observe microbial succession and interactions over time.The column is typically assembled in a transparent glass cylinder filled halfway with sediment mixed with...
01:22Microenvironments
Microorganisms inhabit highly localized spaces known as microenvironments, which are defined by distinct physical and chemical characteristics. These include oxygen concentration, pH, temperature, light availability, and nutrient levels. The conditions within a microenvironment can differ markedly from those in the surrounding area and significantly influence microbial growth, metabolism, and community structure.Microenvironments often display sharp physicochemical gradients over small spatial...
01:25Microbial Mats
Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
01:30Microbial Wastewater Treatment
Microbial communities in aquatic ecosystems play a key role in the natural breakdown of contaminants introduced through domestic and industrial effluents. Acting as biological catalysts, these microbes change and mineralize a wide range of organic and inorganic pollutants under different redox conditions.In oxygen-rich surface waters, aerobic heterotrophs lead organic matter breakdown, using oxygen as the terminal electron acceptor to efficiently oxidize substrates to carbon dioxide and water.
01:29Bioreactor Design and Operational System
Bioreactors are engineered vessels designed to cultivate microorganisms under controlled conditions for industrial bioprocessing. They maintain sterility and allow precise regulation of pH, temperature, oxygen, and nutrient levels to optimize microbial growth and metabolite production. Bioreactors range from small laboratory units of 1 liter to industrial systems holding up to 500,000 liters, though only about 75% of their volume is actively used for fermentation. The remaining headspace...
01:18Bioreactor Controls-II
In aerobic fermentations, oxygen is vital for microbial growth and metabolite production. Since air comprises only about 20% oxygen and the gas is poorly soluble in water—just 9 ppm at 20°C—supplying sufficient oxygen becomes a critical challenge, especially in high-demand processes like yeast growth or citric acid production. Even a fully saturated broth may offer only a few seconds of oxygen availability.To address this, sterile or scrubbed air is introduced into the fermentor via a sparger...