This study analyzed ethanol production by 10 marine strains of yeasts, isolated from mangrove sediments. Of the species tested, Pichia salcaria exhibited the maximum ethanol production of 12.3±3.1 g/l. This was further studied in the culture filtrate supplemented with different concentrations (0.01, 0.1, 1, 2 and 4% w/v) of sawdust as substrate that was pre-processed with phosphoric acid, and then incubated for different durations (24,48,72, 96 and 120 h). The ethanol production by P. salcaria was found maximum (26.2±8.9 g/l) in 72 hours of fermentation in the culture broth supplemented with 2% sawdust that was preprocessed with dilute phosphoric acid. This condition of fermentation was found coincided with high activity cell ase in the cul ure broth, which also revealed a single prominent protein band of 68 kDa molecular weight, similar to cellulase. The study proved the efficiency of marine P. salcaria in bioethanol production
