The intended circular economy for plastics envisages that they will be partially replaced by bio-based polymers in the future. In this work. the natural polyester polyhydroxybutyrate (PHB) was produced by Azohydromonas lata using cheese whey (CW) as a low-cost substrate. Initially. https://www.parisnaturalfoodes.shop/product-category/myco-10-mushroom-complex/