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...
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