10-07-2012, 01:15 PM
GREEN FUEL-FUEL FROM ALGAE
ALGAE SEMINAR.pptx (Size: 2.08 MB / Downloads: 95)
INTRODUCTION
BIOFUELS
Alternative to Petroleum based Fuel
Cleaner Fuel
Renewable source of energy
ALGAE
Algae are single celled or multicellular, chiefly aquatic, plant like organisms.
Algae are photosynthetic.
They are nourished by carbon dioxide and nitrogen and release large amounts of oxygen into the atmosphere.
Benefits of Algal Biofuels
Impressive productivity
Mitigation of CO2
Non-Competitive with Agriculture
Flexible on Water Quality
Broad Product Portfolio
The lipids produced by algae can be used to produce a range of biofuels, and the remaining biomass residue has a variety of useful applications:-
(a) Combust to generate heat
(b) Use in anaerobic digesters to produce methane
© Use as a fermentation feedstock in the production of ethanol
(d) Use in value-added byproducts, such as animal feed
ALGAE HARVESTING
When cultivating seaweed, every system requires a specific method of harvesting the biomass, but most commonly a specially developed harvesting vessel is used, which cuts the seaweed and hauls it inside.
Microalgae concentrations always remain very low while growing. The size of algae is only a few micrometers. These two aspects make the harvesting and further concentration of algae difficult and therefore expensive.
Harvesting has been claimed to contribute 20–30 percent to the total cost of producing the biomass.
CONCLUSIONS
Biodiesel derived from microalgae appear to be the only current renewable source that can potentially completely substitute fossil fuels.
Algae produce 100 times more oil per acre than traditional food oilseed crops (i.e. corn, soy, etc.).
. Algae yield from one acre of wasteland can be 10 times more than jatropha and by a conservative estimate over 10,000 liters of oil can be produced from one acre of waste/degraded land. So the algae can replace jatropha.
In India lots of land used for the producing jatropha. Algae farming for oil can be great opportunity for India, its farmers and industry. Algae are fast emerging as the most efficient source of feedstock for biodiesel industry.
Algae eat CO2, the major global warming gas, and produce oxygen.
Algae require only sunshine and non-drinkable (salt or brackish) water.
Algae do not compete with food crops for either agricultural land or fresh water.
Algae can reproduce themselves and their oil every 6 hours, while it takes Mother Nature millions of years to produce crude oil in the ground.
It is apparent that an economically viable algae-to-biodiesel commercialization will initially depend on government subsidies and the future price of oil, in addition to optimized biomass yields.