The process includes the reaction of vegetable oil with the alcohols in the presence of a catalyst, while the alcohols are usually ethanol or methanol. For the purification of the bio-diesel and removal of the phospholipids, the ultra-shear mixers or the De-gumming process is used, as they can efficiently blend and mix the acid or water into the oil for the formation of bio-diesel. The other processes of bio-diesel production involve the following (Dub, Marc A, et al. 2007).
There are numerous positive impacts on occupational health and safety when the bio-diesel replaces the hydro-carbon fuels. Serious, continuous and long enduring exposure to the petroleum fuels has always caused environmental pollution (Fernando, Sandum D, et al. 2007).. The air pollution, water pollution and soil pollution are the direct result of heavy transport on roads using petroleum fuels. The use of bio-diesels in transport vehicles can save many drivers, pedestrians and indirect victims like factory workers from lungs cancers, skin abrasions and gastric diseases.
Bio-diesels are environment friendly and greener in action. Being less combustible, the bio-diesels are less dangerous for the human life as compared to their petro-besed counterparts. The excessive use of hydrocarbons has been a reason for the extinction rare flora and fauna on the earth. The plants, animals and marine life destroyed by the petroleum products had a deeper link with the human health and occupational safety (Al Gore 2007). Sea water has been frequently polluted with the leakage and seepage of petrol while being transported by ships. This has caused serious destruction of marine life. The workers employed in the petroleum factories are always exposed to serious risks of life. Therefore, bio-diesels used in the transport are a single answer to many questions of health and safety for the workers and transporters in addition to the whole mother earth. That's why these fuels are becoming popular around the world because of their benefits for the occupational safety and the ecological environment. The only hindering factor in their production, distribution and consumption has been their higher cost of production.
It is also quite evident, from the vicious bonding between the terrorists and the leaders of the petroleum producing countries that the demand for finding some other substitute of petroleum is raising day by day. The margin of problems created by the continuous use of petroleum is rising more every day as all under-developed countries greatly depend on the fuel (petroleum) that is sold by the tyrants only. US economic conditions are getting worse every day due to the reason that she spends more than $ 100-150 billion annually for purchasing oil from other countries. US military also demands high proportion of fuel and oil to be used for our defense. To develop some other useful alternatives of oil should be the top and utmost priority of USA. In the United States of America a larger quantity of