Process for producing esters and biolubricants, catalysed by fermented solid

A process for producing biolubricant esters, comprising:

• a) culturing a microorganism on agricultural waste by solid state fermentation to obtain a biocatalyst;
• and
• b) reacting methyl biodiesel or free fatty acids with a polyhydroxylated alcohol in the presence of the biocatalyst obtained from step a) to generate one or more biolubricant esters,
• wherein
• the agricultural waste is cottonseed cake or palm oil cake;
• the biocatalyst comprises a fermented solid produced by the solid state fermentation of the agricultural waste by the microorganism;
• and
• the methyl biodiesel is soya biodiesel or castor oil biodiesel.