油的生物降解在提升盆地被深埋灭菌阻止了
A Wilhelms1, S R Larter, I Head
1Norsk Hydro Research Centre, PO 7190, 5020 Bergen, Norway.
Nature
|June 29, 2001
概括
石油生物降解对于石油质量至关重要,通常发生在80°C以下. 然而,在凉爽的盆地中,未降解的油脂建议在深度埋葬期间先进行灭菌,防止细菌在提升时重新定居.
科学领域:
- 地质化学 地质化学
- 微生物学 微生物学
- 石油地质学 石油地质学
背景情况:
- 细菌生物降解对地球储备中的原油质量产生重大影响.
- 了解石油生物降解对于经济上可行的石油勘探至关重要.
- 有效的生物降解通常被认为发生在80°C以下,尽管人们推测更高的温度.
研究的目的:
- 研究导致石油在地质构成中的生物降解的条件和过程.
- 为了使80°C以下的储中未降解油的存在与已建立的生物降解理论相协调.
主要方法:
- 来自多个油库的生物降解程度数据的编制和分析.
- 石油生物降解与地质历史的相关性,包括提升和埋葬温度.
主要成果:
- 在浅,凉爽的盆地中未降解的油主要存在于从更深,更热的地区提升的水库中.
- 在深埋过程中将其加热到大约80-90°C,似乎可以使石油储无菌化.
- 无菌沉积物,即使在提升和重新填充石油后,也没有显著的碳化合物降解细菌重新定居.
结论:
- 在深度埋葬过程中,通过热应力 (80-90°C) 进行水库灭菌是限制生物降解的关键因素.
- 以前暴露于高温的升高水库由于深层生物圈微生物的无活化而保持非生物降解.
- 缺少碳化合物降解剂的重新定居,可以防止在无菌,较冷的环境中生物降解.
更多相关视频
13:38Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
Published on: May 10, 2013
09:49Prospecting Microbial Strains for Bioremediation and Probiotics Development for Metaorganism Research and Preservation
Published on: October 31, 2019
相关概念视频
Bioremediation
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
Lipid Catabolism
Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
Microbes 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...
Microbial Bioremediation of Hydrocarbons
Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
Microbial 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.
Microbes and Climate Change
Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...
