1. Why should we not throw waste cooking oil down the drain?
  2. How and where can we dispose the waste cooking oil?
  3. Are there are significant quantities of waste cooking oil in Greece?
  4. Are biofuels produced in Greece today?
  5. What are the 2nd generation biofuels?
  6. What are the advantages of BIODIESEL-2G?
  7. What is the waste cooking oil to BIODIESEL-2G conversion yield?
  8. Does the use of  BIODIESEL-2G require engine modifications?
  9. Can we use the BIODIESEL-2G in our car?
  10. Where can we purchase the BIODIESEL-2G;



  1. Only 1 liter of waste cooking oil can contaminate 1,000,000 liters of water, which is the water quantity consumed by a person in 14 years! For this reason the disposal of waste cooking oil down the drain should be avoided. It’s preferable for the waste cooking oil to be collected (see question 2).
  2. Waste cooking oil can be gradually collected in plastic or glass containers after its use. The containers can then be given to the nearest of the 23 restaurants/taverns/fast-food restaurants of Thessaloniki participating in the project.
  3. According to conservative estimates provided by waste cooking oil collection companies, ~280,000 tonnes of waste cooking oil can be collected annually in Greece.
  4. Today there are over 15 companies producing biodiesel (FAME) as well as companies producing solid biofuels (pellets) in Greece.
  5. The 2nd generation biofuels are fuel substitutes which are produced from residual biomass (agricultural and forestry residues, organic municipal and industrial residues etc.). The biggest advantage of 2nd generation biofuels over the 1st generation biofuels is that their production does not compete with food crops, since it is based on residual biomass. The production of 2nd generation biofuels is based on thermocatalytic processes such as catalytic hydrocracking (more...).
  6. The use of BIODIESEL-2G has financial and environmental advantages. In particular, BIODIESEL-2G shows increased calorific value (49MJ/kg) and cetane number (~77) which result in lower fuel consumption per kilometer (l/km). The negligible oxygen content makes it particularly stable, both during prolonged storage and during transport, in contrast to 1st generation biofuels. Moreover, as the production of BIODIESEL-2G is based on the exploitation of waste cooking oil, it further contributes to the effective management of this residual material.
  7. The overall conversion yield of waste cooking oil into BIODIESEL-2G exceeds 90%. This means that from 100 liters of waste cooking oil we can obtain more than 90 liters of BIODIESEL-2G.
  8. As the properties of BIODIESEL-2G abide with most diesel fuel standards, its use does not require engine modifications. However, the use of a 50/50 mixture with conventional diesel fuel is recommended.
  9. If your car uses diesel, then BIODIESEL-2G can be used in your car. However its use is not recommended for gasoline vehicles since the specifications of BIODIESEL-2G are similar to those of diesel fuel and not gasoline.
  10. BIODIESEL-2G is a new biofuel produced for the first time in Europe at CERTH, but is currently at a demonstration stage. In 2012, a garbage truck of the Municipality of Thessaloniki will use BIODIESEL-2G as fuel!