Effect of cultivation parameters on the production of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) and poly(3-hydroxybutyrate-4-hydroxybutyrate-3-hydroxyvalerate) by Cupriavidus necator using waste glycerol

► Waste glycerol was upgraded to biopolyesters by an environmental friendly route. ► PHA accumulation increased with the increase of the dissolved oxygen concentration. ► 4HB molar% increased using propionic acid, however 3HV monomers were synthesized. ► PHA desired properties and productivity depend on total cultivation time.