الملخص

Abstract The study was conducted to show the ability of three species of Penicillium; P. roquiforti, P. camemberti and P. viricosum for single cell protein and polysaccharides production. The results indicated that P. viricosum, P. camemberti, P. roquforti achieved highest figures in polysaccharides (0.21 gm/100ml), dry weight (1.8 gm/100ml) and protein content (0.72 gm/100ml) respectively. The effect of different nitrogen sources were studied. Ammonium phosphate gave maximum productivity in polysaccharides, protein content and biomass production, (0.23, 0.86 and 2.65 gm/100ml) respectively. At the same time 0.4% Ammon. Phoph. showed highest productivity in polysaccharides production (0.235 gm/100ml) while 0.6% of the same nitrogen source gave maximum growth and protein content, (2.8 & 1.1 gm/100ml) respectively.