Study of optimum conditions for Polyhydroxybutyrate production from local isolate of Bacillus cereus B5

Abstract

The highest Polyhydroxybutyrate (PHB) production from Bacillus cereus B5 were 6.2 g / L, biomass 8.4 g / L and 73.8% the yield by the using optimum conditions, incubation temperature 35̊ C, for 48 hours aerobically by using shaking incubator on 150 rpm / min , 2% inoculum volume, the pH value was 7, and the production media was content 1% glucose as carbon source and 0.25 % peptone as nitrogen source.