[Excerpt] Introduction: Polyhydroxyalkanoates (PHAs) are promising biopolymers for replacing less eco friendly polymers, although their price is still higher. PHAs can be produced via mixed microbial cultures (MMC) from carbon-rich waste to reduce costs; however, this process has challenges due to the variability in waste composition and seasonality [1]. The most common PHA copolymer produced from wastes by MMC...