الملخص

Five different fungal isolates were cultivated in a medium containing orange waste as a sole carbon source. Among fungal isolates, Aspergillus niger was superior in protein production ( 35,94 % ) based on dry weight after 8 days of incubation, Effect of different concentrations of orange waste powder also were studied. Maximum fungus growth and protein production occurred at 4 %. Out of 3 yeasts, Candida utilis gave. higher protein yields ( 33,05 % ) after 5 days of incubation. In an attempt to increase production of protein, a mixed culture of A. niger and C. utilis was done. Inoculation of C. utilis after 4 days of inoculation of A. niger resulted in increasing production of protein to 42,17 %.