diesel, produced by special strains of E. coli bacteria

A group of scientists from the University of Exeter, with support from Shell, has developed a new technique which makes use of bacteria to produce diesel fuel. While this new method still faces a number of problems on its way to commercialization, the diesel, produced by special strains of E. coli bacteria, is almost identical to conventional diesel fuel.

This means that it does not need to be blended with petroleum products as is often required by biodiesels derived from plant oils. It also means that the diesel can be used with current supplies in existing infrastructure because engines, pipelines and tankers do not need to be modified. Biofuels with these characteristics are being termed ‘drop-ins’.