Algae As A Biodiesel Feedstock

Even the best agricultural feedstocks like sugarcane have much of their biomass’ potential energy locked up in the “woody” parts of the plant. The sugars in this part of the plant – the cellulose – are complex (known as polysaccharides) and are protected by an even tougher substance known as lignin. The fermentation organisms and process widely used today cannot convert the polysaccharides in cellulose to useable sugars. Several promising new cellulosic technologies are being tested and rapidly commercialized. By making uses of plant material once viewed as waste, EROEI (energy returned on energy invested) improves, food prices are not bid up and, carbon-neutral goals are advanced (limited new CO2 is released). Cellulosic technologies also catalyze the use of energy-dense, cellulose rich energy crops such as switchgrass and miscanthus.

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