Lipomyces starkeyi can live on
and convert sewage sludge into lipids,
but a pretreatment of the sludge with alkaline or acid hydrolysis is required,
which is highly
energy-consuming and less environmental friendly [5]. Some potential
feedstock from waste lipids such as waste cooking oil and
rice bran oil have been investigated for biodiesel production, too
[6,7], but the information is scarce on using those materials to
produce biodiesel on an industrial scale.