Effect of Heat and Nitrogen Stress on Growth and Lipid contents of Chlamydomonas reinhardtii

Abstract

Global warmmg and the exhaustion of fossil fuels are major world-wide problems. Energy demand is increasing day by day and human are aggressively using fossil fuels to fulfill their needs due to which it is unsustainable, because of the increasing level of consumption and inadequacy of novel sources for these non renewable. The increasing demand of energy is making scientist, to find an alternative reliable energy source like solar, water, wind and biomass to replace fossil fuels. The transesterification of fats and oils derived a fuel called biodiesel and it is biologically fully degradable. Different kind of materials such as plants, microalgae, and animal fat has been undertaken as an alternative energy source for the production of biodiesel (Vasudevan and Briggs, 2008). The derivates of biofuel are sugar, starch and lipid rich substance, substitutes of liquid fossil fuels. These substances can be obtained from feedstock like cereal crops, together with corn and wheat (Nichols and Bothast, 2008), sugar crops, sorghum, sugarcane; energy crops, such as switch grass, horticultural waste products, such as straws and dried leaves of corn, domestic wastes and many marine species. Presently a great amount of ethanol can be obtained from corn and sugarcane as a derivative fuel, and is substitute for gasoline. In particular, biodiesel has two important advantages, the reduction of carbon dioxide and as alternative for petroleum (Chisti, 2008).