The alimentary origin-exhausted vegetable oils that can be used for energy valoriza­tion are those that are obtained from industrial processes (from ovens and fryers) and from domestic users (frying oils and oil for food conservation). Before being transformed into bio-diesel, the oils of alimentary origin must be subjected to the regeneration process which involves the following steps: removal of the rough impu­rities through subsequent filtrations, neutralization and dehydration. The exhausted regenerated vegetable oils can be used in a similar manner as the oils obtained from dedicated cultures and from this point they follow the same spinneret [2].