Biomass suspension catalysed the generation of various alkyl esters from acid oil and virgin cottonseed oil

A substantial reduction in the cost of biodiesel production necessitates the identification of less expensive lipid-bearing substrates and a cost-effective process. The present study demonstrates the use of biomass suspension of Aspergillus sps. as a whole-cell catalyst for the generation of various alkyl esters from acid oil and cottonseed oil with different alcohols (methanol to decanol) as acyl acceptors. The yield of alkyl esters increased from methanol (79%) to pentanol (87%), followed by a decrease from hexanol (80%) to decanol (55%) in the case of acid oil. The extent of transesterification was significantly higher [P < 0.05] in case of acid oil, with most of the acyl acceptors as compared to cottonseed oil. The study reveals the potential use of biomass suspension of fungus as a catalyst and acid oil as an alternative, low-cost bearing, and quality feedstock for the generation of biodiesel for a diverse variety of industrial/commercial use.