Bioalcohols are produced using fermentation of starches and sugars from crops such as sugar beet and wheat.  There are two bioalcohols which are currently considered suitable for use in transport fuels, bioethanol and biobutanol.

Bioethanol
Bioethanol is made using yeast fermentation and can be mixed with petrol at up to 5% inclusion and used in cars running on ordinary unleaded petrol.  British Sugar was the first company to manufacture bioethanol in the UK at its Wissington plant.  Bioethanol is mixed with petrol in the UK and sold at a number of fillng stations.

Biobutanol
Biobutanol is another alcohol which can be produced from renewable crops and blended with petrol.  Up to 10% biobutanol could be included in ordinary petrol and used by any car in the UK which runs on unleaded petrol. Biobutanol is made by fermentation using bacterial enzymes. Biobutanol is not currently poroduced in the UK but BP and DuPont are to build a biobutanol demonstration facility at Saltend, Hull.