使用不同的有机基质进行De novo无氧颗粒化:颗粒的生长和微生物社区的反应
Chang Gao1, Anna Doloman2, Emilie Alaux2
1Department of Environmental Technology, Wageningen University and Research, Bornse Weilanden 9, 6708 WG Wageningen, the Netherlands.
The Science of the total environment
|August 17, 2024
概括
将蛋白质添加到废水处理中可以加快污泥颗粒化. 这项研究表明,在启动过程中补充蛋白质可以加速该过程,即使没有盐水条件,为更快的废水处理提供了实际策略.
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
背景情况:
- 无氧颗粒化对于废水处理至关重要,通常来自分散的注射剂而缓慢.
- 以前的研究表明,盐水条件和蛋白质的添加加快了颗粒的形成.
研究的目的:
- 调查蛋白质添加是否在非盐水条件下加速无氧污泥颗粒化.
- 为了确定涉及加速颗粒化的微生物群落.
主要方法:
- 四个实验室规模的上游无氧污泥覆盖反应堆运行了262天.
- 反应器被养成不同碳水化合物/蛋白质比率的合成基质 (葡萄糖,乙酸/,葡萄糖/,葡萄糖/粉).
- 通过显微镜,细胞外聚合物物质分析和微生物多样性分析来评估颗粒的发育.
主要成果:
- 在用葡萄糖和蛋白质 (三子或粉) 补充的反应器中,颗粒化显著更快.
- 颗粒大小的增加与Muribaculaceae和Lachnospiraceae细菌的丰富性相关.
- 含有试的颗粒显示出高比例的发酵细菌和挥发性脂肪酸氧化细菌.
结论:
- 补充蛋白质,即使是少量,在非盐水条件下有效地加速无氧污泥颗粒化.
- 特定的细菌家族 (Muribaculaceae,Lachnospiraceae) 和发酵/氧化细菌在颗粒化中发挥着关键作用.
- 这一发现提供了切实可行的策略,以提高废水处理效率,在没有颗粒性注射剂的情况下加速颗粒化.
更多相关视频
07:56Author Spotlight: Unraveling the Mysteries of Terrestrial Anaerobic Microorganisms in Uncharted Environments by In Situ Culturing
Published on: January 12, 2024
871
07:31Author Spotlight: Designing Simple and Inexpensive Techniques to Grow Methane-Oxidizing Bacteria in the Laboratory
Published on: September 6, 2024
909
相关概念视频
01:23Microbial Fermentation
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
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...
01:26Microbes and Methanogenesis
Methanogenesis is a critical microbial process in anaerobic ecosystems responsible for the biological production of methane, a potent greenhouse gas and valuable biofuel. This metabolic pathway is primarily facilitated by methanogenic archaea, which thrive in anoxic environments such as wetlands, sediments, and animal gastrointestinal tracts. The absence of oxygen in these habitats prevents aerobic respiration, thereby favoring alternative biochemical pathways for organic matter degradation.In...
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.
01:25Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...