ISB 201 1st Edition Lecture 22 Outline of Last Lecture I. Conventional EnergyII. ElectricityIII. Fossil Fuels Outline of Current Lecture IV. Biomass Energy Current LectureI. Biomass energy: energy obtained from the biomass of living or recently living organisms A. Traditional1. Burning firewood- main source of heat in many Russian villages2. Burning charcoal- pre-charred wood; main fuel in developing countries3. Burning dung- formed into disks and burned; IndiaB. New1. Agricultural products2. Algae/ seaweed- capture CO2 from nearby power plants for growth3. Animal wastesC. Biofuels: process of obtaining energy from agricultural products and algae is similar to the process of making moonshine or beer1. Make Moonshinea. Combine grains and water to create a mash (sugars)b. Enzymes added to cause fermentation (feed on sugars)c. Evaporate concentrated liquid by adding heatd. Remove heat and the condensed liquid is alcohol 2. 1st vehicles designed to run off biofuels3. Flex fuels- mixture of gasoline and ethanol or methanol4. Prosa. Reduce CO2 emissionsb. More energy efficient- from extraction to consumer (as a whole)c. Recycling of agriculture wastes like corn and sugar cane partsd. Geographically widespread5. Consa. Reduces soil fertility because removing plant material that would normally decompose and nutrientsThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.b. Competes with food production and increases prices populationgrowthc. Impact environment ex: palm plantations for palm nuts and biofuelsi. Monocultureii. Increased pesticide used. water contamination e. water depletion D. 20% reduction in gas = 25% of agricultural land converted to ethanol production1. Messing with economy and big business; hard to switch2. Sweden leading the way. More energy from biofuels than
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