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bioethanol production

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bioethanol production

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bioethanol production

  1. 1.  Introduction  Production of Bioethanol  Bioethanol Need of future  Advantages & Disadvantages 
  2. 2. Raw material : Wheat/Grains/Corn/Sugar-cane can be used to produce ethanol. (Basically, any plants that composed largely of sugars) The raw materials used in the manufacture of ethanol via fermentation are conveniently classified into three main types of raw materials: sugars, starches, and cellulose
  3. 3. Potato  Mashing and Washing  Cooking  Starch hydrolysis 1- Liquefaction 2-saccherification Fermentation Distillation Ethanol
  4. 4. • Used as a raw material in ethanol production • By exposing starch from peel of corn with water • Enzymes are added to the mash that convert starch to dextrose, a simple sugar. • yeast is added and conversion from sugar to ethanol and carbon dioxide begins.
  5. 5.  Extraction of sugar  Then it is added to yeast for fermentation process  lactic acid, hydrogen, carbondioxide ,ethanol are produced
  6. 6. Ethanol-powered buses (E95) - still a pilot project in Brazil Flex-fuel motorcycles Brazilian-made crop dusting planes running on ethanol
  7. 7. › Exhaust gases of ethanol are much cleaner › ethanol-blended fuels such as E85 (85% ethanol and 15% gasoline) reduce up to 37.1% of GHGs › output of energy during the production is more than the input › the CO2 released in the bioethanol production process is the same amount as the one the crops previously absorbed during photosynthesis
  8. 8.  Not as efficient as petroleum › energy content of the petrol is much higher than bioethanol › its energy content is 70% of that of petrol  Engines made for working on Bioethanol cannot be used for petrol or diesel › Due to high octane number of bioethanol, they can be burned in the engines with much higher compression ratio  Used of phosphorous and nitrogen in the production › negative effect on the environment  Cold start difficulties › pure ethanol is difficult to vaporise
  9. 9.  For bioethanol to become more sustainable to replace petrol, production process has to be more efficient › Reducing cost of conversion › Increasing yields › Increase the diversity of crop used  As microbes are use to convert glucose into sugar which is ferment in bioethanol › Microbiology and biotechnology will be helpful in the genetic engineering

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