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Re: processor2008 post# 279

Wednesday, 07/29/2009 8:45:25 AM

Wednesday, July 29, 2009 8:45:25 AM

Post# of 10190
From WIKI...

" Yield

Yields (gallons of oil per acre per year) cover a vast range from 5,000 to 150,000. If all aspects of the cultivation are controlled - temperature, CO2 levels, sunlight and nutrients (including carbohydrates as a food source), then extremely high yields can be obtained. Such variation can make calculations on which to base 'fuel the world' scenarios very difficult.

For example, Glen Kertz of Valcent Products http://www.valcent.net, claims that "algae can produce 100,000 gallons of oil per acre" per year. This relies on growing the algae in an entirely closed loop system. More recently, Valcent have claimed 150,000 gallons may be possible [13]; their most recent actual reported yields were 33,000 gallons per acre per year[14]. This amounts to 21,153,000 gallons per square mile per year (33,000gallons / acre * 641acres / mi2). In 2007, the U.S consumed 20,680,000 barrels/day of petroleum [15]. That is 3.17E11 gallons/year (20,680,000barrels / day * 365.25days / year * 42gallons / barrel). Thus, with the production capabilities of Valcent, it would only require 15,000 square miles (3.17E11gallons * 1mi2 / 21,153,000gallons) of land to completely displace petroleum use in the U.S.

Current projections, however, do not take into account the energy losses due to converting the algae lipids into fuels."
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