Bacteria bioethanol fermentation

Other types of fermenters have been developed for specific applications. Anaerobic bioreactors are used when microorganisms do the conversions in the absence of oxygen. Examples are the acetone-butanol-ethanol (ABE) fermentation with Clostridium species, the production of lactic acid with lactic acid bacteria, and bioethanol fermentation with Saccharomyces cerevisiae. Because of the need for large volumes with these low-cost products, and the ease of construction, these... 

Ethanol (ethyl alcohol) can be produced from a wide variety of feedstocks, including wood, wastepaper, and crop residues. Ethanol produced from plant biomass is also known as bioethanol. The production of bioethanol from plant biomass involves the fermentation of pulped, mashed, or juiced plant material by yeasts and bacteria (Wiselogel et al., 1996). 

Biological enzymatic conversion of glucose by fermentation also has been extensively studied for the production of many products one of the most important is bioethanol. Many bacteria and fungi could produce enzymes for the hydrolysis of cellulosic material. These microorganisms can be aerobic or anaerobic, mesophillic or thermophillic. ... 

Bioethanol can be produced from the fermentable sugars obtained in the hydrolysis step by bacteria, yeast, or filamentous fungi. In order to prevent the substrate inhibition effects enzymatic hydrolysis and fermentation steps can be combined in a bioprocess called simultaneous saccharification and fermentation (SSF) (Hahn-Hagerdal et al., 2006). At the end of fermentation, ethanol can be purified by distillation and molecular sieves or other separation techniques, which will be ready to be used as a fuel, either neat or blended with gasoline (Hahn-Hagerdal et al., 2006). 

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