Pre treatment for bioethanol 
  production. After lipids are extracted 
  from microalgae to make biodiesel, 
  the residual biomass, which is 
  generated as a by product, can be 
  fermented with yeast 
  to produce ethanol .In this study, 
  FAME was extracted from KNM0029C 
  and the residual biomass was used 
  to produce bioethanol.
 HOW IS BIOETHANOL AND BIODIESEL 
 PRODUCT?
 During fermentation, microorganisms (e.g., 
 bacteria and yeast) metabolize plant sugars 
 and produce ethanol.  Biodiesel is a liquid 
 fuel produced from renewable sources, such 
 as new and used vegetable oils and animal 
 fats and is a cleaner-burning replacement for 
 petroleum-based diesel fuel.
  IS BIOETHANOL A BIOFUEL?
  Biodiesel is an alternative fuel to diesel, and bioethanol can be 
  used in place of petrol. Biodiesel cannot be used on its own in 
  traditional internal combustion engines but can be blended with 
  traditional petroleum fuel. Bioethanol can be used on its own or in 
  a blend.
  CAN BIODIESEL BE MADE WITH ETHANOL?
  Using ethanol or biodiesel reduces the consumption of 
  gasoline and diesel fuel made from crude oil, 
  which can reduce the amount of crude oil imported from 
  other countries. Ethanol and biodiesel are also cleaner-
  burning fuels than pure gasoline and diesel fuel.
 WHAT IS THE DIFFERENCE BETWEEN ETHANOL  
 AND BIODIESEL?
 In it simplest form, ethanol is an alcohol product 
 produced from corn, wheat, sugar cane, and 
 biomass and used as an additive in gasoline to 
 increase its octane level. Biodiesel, on the other 
 hand, is derived from natural oils such as soybean 
 oil or animal fats.