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Related Concept Videos

Fermentation01:29

Fermentation

Most eukaryotic organisms require oxygen to survive and function adequately. Such organisms produce large amounts of energy during aerobic respiration by metabolizing glucose and oxygen into carbon dioxide and water. However, most eukaryotes can generate some energy in the absence of oxygen by anaerobic metabolism.
Fermentation is a type of metabolic process that occurs in the absence of oxygen, where organic molecules such as glucose are broken down to produce energy. During this process, the...
Fates of Pyruvate01:20

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...
Microbes in Beverage Production01:25

Microbes in Beverage Production

Alcoholic beverages such as wine, beer, and spirits are the products of microbial fermentation processes that transform simple sugars into ethanol and a wide array of complex flavor compounds. These transformations rely on the metabolic activities of specific yeasts and bacteria, which are selected and controlled to yield the desired beverage characteristics.Wine Fermentation and MaturationWine production begins with the crushing of grapes to release juice and pulp, forming a must that is...
Bioreactor Controls-III01:22

Bioreactor Controls-III

Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
Production of Alcohol01:27

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...
Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...

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Related Experiment Video

Updated: Jul 13, 2026

Transcript and Metabolite Profiling for the Evaluation of Tobacco Tree and Poplar as Feedstock for the Bio-based Industry
10:50

Transcript and Metabolite Profiling for the Evaluation of Tobacco Tree and Poplar as Feedstock for the Bio-based Industry

Published on: May 16, 2014

Ethanol fermentation from biomass resources: current state and prospects.

Yan Lin1, Shuzo Tanaka

  • 1Asian Center for Environmental Research, Meisei University, Tokyo, Japan.

Applied Microbiology and Biotechnology
|December 7, 2005
PubMed
Summary

Fuel ethanol production from biomass is advancing rapidly. This review covers current ethanol fermentation technologies, resources, microorganisms, and future prospects for cleaner fuel alternatives.

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Last Updated: Jul 13, 2026

Transcript and Metabolite Profiling for the Evaluation of Tobacco Tree and Poplar as Feedstock for the Bio-based Industry
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Published on: May 16, 2014

Techniques for the Evolution of Robust Pentose-fermenting Yeast for Bioconversion of Lignocellulose to Ethanol
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Techniques for the Evolution of Robust Pentose-fermenting Yeast for Bioconversion of Lignocellulose to Ethanol

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Area of Science:

  • Biotechnology
  • Renewable Energy
  • Biochemical Engineering

Background:

  • Growing global demand for sustainable energy sources.
  • Fossil fuel dependence necessitates cleaner alternatives like fuel ethanol.
  • Biomass conversion to ethanol offers a promising renewable energy pathway.

Purpose of the Study:

  • To provide a comprehensive overview of current ethanol fermentation technology.
  • To highlight key biomass resources, microorganisms, and technological advancements.
  • To introduce promising future prospects in ethanol fermentation.

Main Methods:

  • Review of existing literature and practical examples in ethanol fermentation.
  • Analysis of biomass feedstocks and suitable microorganisms.
  • Examination of various fermentation technologies and process optimizations.

Main Results:

  • Significant progress in ethanol fermentation technology has been achieved.
  • Diverse biomass resources and microorganisms are utilized for ethanol production.
  • Several promising technological advancements are emerging.

Conclusions:

  • Ethanol fermentation is a key technology for sustainable fuel production.
  • Continued research in areas like xylose fermentation and enzyme hydrolysis is crucial.
  • Optimized fermentation processes, including immobilization and simultaneous saccharification, enhance efficiency.