Related Experiment Video
Updated: Jun 30, 2026

06:17
Medium Preparation for the Cultivation of Microorganisms under Strictly Anaerobic/Anoxic Conditions
Published on: August 15, 2019
[Progress on hydrogen-production microorganisms by anaerobic fermentation].
Li Song1, Xiaofeng Liu, Yuexiang Yuan
1Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.
Sheng Wu Gong Cheng Xue Bao = Chinese Journal of Biotechnology
|September 24, 2008
Summary
This study reviews hydrogen-producing microorganisms for anaerobic fermentation bio-hydrogen production. It covers microbial types, capabilities, breeding, and genetic modification, analyzing challenges and future research directions.
Area of Science:
- Microbiology
- Biotechnology
- Renewable Energy
Context:
- Anaerobic fermentation for bio-hydrogen production is gaining significant attention.
- Hydrogen-producing microorganisms are central to this process.
- Research is advancing globally in this field.
Purpose:
- To review the current status and achievements in hydrogen-producing microorganism research.
- To present information on fermentative types, hydrogen-production capabilities, and bacterium types.
- To discuss breeding strategies and genetic modification of these microorganisms.
Summary:
- The review covers various aspects of hydrogen-producing microorganisms, including their fermentative types and capabilities.
- It details different bacterium types, breeding techniques, and advancements in genetic modification.
- Key challenges and future research prospects in bio-hydrogen production are analyzed.
Impact:
- Provides a comprehensive overview of hydrogen-producing microorganisms for bio-hydrogen technology.
- Identifies critical areas for future research and development in microbial hydrogen production.
- Contributes to the advancement of sustainable and renewable energy solutions through biotechnology.
Related Concept Videos
Production 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...
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 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...
Production of Alcohol
Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...
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.
Fates of Pyruvate
Pyruvate is the end product of glycolysis, where glucose is oxidized to pyruvate, simultaneously reducing NAD+ to NADH. Two molecules of ATP are also produced by substrate-level phosphorylation.
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...
In aerobic organisms, pyruvate is metabolized via the citric acid cycle to produce reduced coenzymes NADH and FADH2. These coenzymes are then oxidized in the electron transport chain to produce ATP and, in the process, regenerate the NAD+ and FAD. As seen in some cell types and organisms, fermentation...

