Yeasts isolated from palm wine were cultured in media of varying cassava peel concentration and their growths were monitored. Thereafter, the yeasts were subjected to crude protein analysis. The performance in terms of crude protein and growth rate using monod model was studied. The results show that the maximum crude protein content of about 4% was obtained at 1.5% cassava peel concentration for media unamended with ammonium sulphate. For cassava peel media amended with ammonium sulphate, the maximum crude protein content of about 7% was obtained, also, at 1.5% cassava peel concentration. The maximum specific growthrates were 0.38 day-1 for 1%, 0.47 day-1 for 1.5% and 0.41 day-1 for 2% for amended cassava peel media. For cassava peel media amended with ammonium sulphate, the maximum specific growth rates were 0.9day-1 for 1%, 0.94 day-1for 1.5% and 0.96 day-1 for 2%.