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There has been a lot of study on technical aspects of energy plagiarized from biomass, both the biofuel and biodiesel; examples include the studies conducted by Faaij, (2006), Ryan et al., (2006) and Goldemberg and Teixeira, (2004). Two main classes of biofuels are bio ethanol and biodiesel. Biofuels are classified into first and second generation on the basis of the source of fabrication.

2.2 First Generation of Biofuels

According to the studies carried out by Van Der Laaaka et al., (2007) regarding the sources of production of bio ethanol, it has come into sight as the chief candidate for replacement of gasoline to be used in transportation vehicles. The sources of its fabrication are usually the food crops, examples include sugarcane, corn, and sorghum; sugar beet and wheat are also being used in some countries for the bio ethanol production. They concluded that biofuel can be synthesized by using crops other than food crops; it is more advantageous alternative than food crops and their residues.

There is a serious concern that the first generation biofuels are consuming the food sources that were mainly comestible in the past. It was revealed by McCormick-Brennan et al, (2007) that the most serious concern related to the first generation biofuels is the inefficiency, this concern requires the use of different production technologies and use of energy efficient crops for the synthesis of these fuels. The entire ranges of first generation processes for synthesize of biofuels from the corn and wheat depends upon the starch content of the kernels of these crops.

In case of sugar cane and sugar beet the quality of biofuel depends on the sucrose content of the two. The rest of the substances preset in these crops are wasted after their use for the production of biofuels. Some production units are also using seeds of different crops for the extraction of the vegetable oil that is in turn used for the production of the biodiesel. The efficiency of biofuels is also questioned by Van Der Laaka et al., (2007).

Both the above mentioned researches have considered inefficiency of the biofuels as a drawback that makes them unfit as a replacement for biofuels. The expenditure of energy is more than the output obtained in the form of biodiesel or bio ethanol. The expenditure of energy starts right from the cultivation of the crops and energy is consumed in reaping and dispensation of the biomass. The portion of energy that is used in the processing units is small as compared to the energy used in the production of the biomass. Both the researches have yielded similar results but the Van Der Laaka et al., (2007) have discussed several reasons for the inefficiency of first generation biofuels.

The studies on biofuels by McLaren, (2005) publicized that the inefficiency problem may be assuaged by biotechnological research on biofuels. Researches on biotechnological aspects of the corn and it genetic management in USA have resulted in considerable enhancement of the biofuel yields. The researcher also concluded that further gene manipulation of these crops can increase 本论文由英语论文网提供整理，提供论文代写，英语论文代写，代写论文，代写英语论文，代写留学生论文，代写英文论文，留学生论文代写相关核心关键词搜索。