The highest PHB content, 73.9% (w/w), was obtained by Yu and Stahl (2008) from sugarcane bagasse using a recombinant
E. coli. In another case, by process parameter optimization, Silva et al. (2007) obtained the PHB content of 72%
from acid hydrolyzed sawdust using Sphingopyxis macrogoltabida LMG 17324.