Production of Bioethanol

Akshay Dagade.Manoj Khamgal.Jitin Nair.

Keywords

Introduction Production of Bioethanol Bioethanol Need of future Advantages & Disadvantages Conclusion

Introduction

Bioethanol : Used to substitute petrol fuel for

road transport vehicles Colour less and clear liquid One of the widely used alternative

automotive fuel in the world (Brazil & U.S.A are the largest ethanol producers)

Much more environmentally friendly Lower toxicity level

Production of Bioethanol

Wheat/Grains/Corn/Sugar-cane can be used to produce ethanol. (Basically, any plants that composed largely of sugars)

Raw material :

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

Production from potato

Potato

Mashing and Washing

Cooking

Starch hydrolysis

1- Liquefaction 2-saccherification

Fermentation

Distillation

Ethanol

Production from Corn

• 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.

Production from Sugar cane

Extraction of sugar Then it is added to yeast for

fermentation process lactic acid, hydrogen,

carbondioxide ,ethanol are produced

Bioethanol Need of futureEthanol-powered buses (E95) - still a pilot project in Brazil

Flex-fuel motorcycles

Brazilian-made crop dusting planes running on ethanol

Advantages

› 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

Disadvantages

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

Conclusion 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

Thank u…