The present study aimed at directly producing biodiesel using oil extracted from wet cells of marine microalga, Chlorella salina. The protocol involved cellulase for oil extraction and lipase for oil conversion to FAME during interesterification immobilised on magnetic nanoparticles. Anaerobically synthesized magnetic nanoparticles were characterized using TEM and XRD Spectroscopy. Studies were also carried out to learn the effect of immobilised enzymes on their respective operations and water content for FAME synthesis. The investigation showed that 2g of each immobilised enzyme- cellulase and lipase was found to be optimum for oil extraction and FAME conversion respectively and 60% water was required for biodiesel production. A maximum yield was observed as 93.56% under optimised conditions along with standard parameters. Experiment on stability and re-utilization of immobilised materials revealed that they remained intact without any loss in their functions even after 10 cycles of repeated usage. The overall study represented that it is a rapid and economical prospect for producing biodiesel commercially in a greener way causing negligible harm to ecosystem.