Cellulosic resources such as paper, cardboard, wood, agricultural residues and other fibrous plant material are in general very wide spread and abundant. For example, forests comprise about 80% of the world's biomass. Ethanol can be produced from different kinds of raw materials. The raw materials are classified into three categories of agricultural raw materials: simple sugars, starch and cellulose. Cellulosic biomass materials can be supplied from a variety of resources at a low price. They can be classified in four groups based on type of resource:...
Monday, October 19, 2009
Sugar Beet as a Raw Material for Bioethanol Production
Many papers have been focused on the total energy effectiveness of bioethanol production from sugar beet. Itis considered that energy needed for sugar beet processing to obtain ethanol is equal to 25–50% of the energy cost of produced ethanol. The costs depend on the technique of treatment and that is why it is possible to find variant numbers qualifying the total efficiency in a widerange from 67% (loss) to 300% (very optimistic estimation) .
From an economic point of view and in comparison with cereals, sugar beet and intermediates from beet...
Continuous Fermentation Through Fixed-yeast Fluidized-bed
The new fermentation technology through fixed yeast fluidized-bed is an advanced biological technique in the world of today. Comparing with batch fermentation and /or single concentration continuous fermentation, the new fermentation technology possesses the advantages of quick speed, shout fermentation cycle, high yield, few instruments, and it is easy to realize automation. The production capacity of the new technology is 10 to 20 times as high...
Sunday, October 18, 2009
Raw Material for Bioethanol
Bio-ethanol is obtained from the conversion of renewable agricultural, carbon based feedstock. Ethanol production is primarily from sugarcane, sugar beets and maize. A wide variety of other agricultural feedstocks can be used as well as straw and waste biomass. Bio-ethanol fuel from sugar cane is being used as fuel in Brazil; from corn for petrol additives America; and from straw in Canada.
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Wednesday, October 14, 2009
Ethanol produces more energy than it takes to produce, says U.S. analysis
ARGONNE, Illinois, US, April 20, 2005 (Refocus Weekly) Ethanol generates 35% more energy than it takes to produce, due to the use of solar energy to grow the corn, according to a study by Argonne National Laboratory.
“We believe (the study) has laid to rest some long-held misunderstandings about ethanol and its important role in reducing America's reliance on imported oil and our greenhouse gas emissions,” the U.S. Department of Energy concludes in a study by researcher Michael Wang. “In terms of key energy and environmental benefits, cornstarch...
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