Another important economical source for production of biodiesel is algae. Algae for producing oil for biodiesel can be sourced cheaply from sewage wastes thus obviating the need for land which can be utilized for growing food. Many people consider waste vegetable oil to be the most ideal source for production of biodiesel. But the volume of biodiesel required to be produced to meet the demands of the transportation and household sectors is too large to be met with the inadequate supply of waste vegetable oil. Similarly inadequate is the supply of animal fat to produce biodiesel. Use of petroleum diesel can however be reduced to some extent by using discarded animal fat to produce biodiesel. Discarded chicken fat that can be procured from local poultry firms can be a viable source for biodiesel. Around 3 million gallons of biodiesel can be manufactured from nearly one billion kg of chicken fat and this source is utilized by some plants in USA

Not Enough to Replace Fossil Fuel

To produce soybean and animal fat in a scale than can produce enough biodiesel to substitute petroleum diesel as fuel is practically not possible. The enormous quantity of vegetable oils required to be produced towards making biodiesel would need very large scale farming with use of pesticides and fertilizers. People all over the world might object to such large scale diversion of agricultural land for producing vegetable oilseeds instead of food cultivation. As per the estimates of the Energy Information Administration of the US Department of Energy, consumption of diesel as engine and heating fuel is around 160 million tonnes in USA. Production of vegetable oils and animal fat in the country is estimated to be around 11 million tonnes and 5.3 million tonnes respectively that indicate the inadequacy of the production of these substances to produce biodiesel in sufficient volume to replace petroleum diesel.

From Algae
To produce biodiesel from soybean oil to meet the estimated consumption in USA of 160 million tonnes of fuel would require the total cultivable land of the country. This impractical prospect can be eliminated by the alternative option of using algae from sewage wastes that is economical and does not require much land. According to the estimate of the Department of Energy, to meet this fuel need, only 15000 square miles of land is required for growing algae. Algae can be grown in arid lands including in desert and marine conditions and can yield more oil for biodiesel than other plants. The energy yielded by algae per acre is estimated to be 30 times more than crops grown on land like soybean.

About the Author: If you would like to make your own biodiesel, you can use the biodiesel ebook. Article written by Peter Vandenberg for Biodiesel Expansion.