This book explores various aspects of bioplastics and the circular bioeconomy, covering topics such as different types of bioplastics, biomass valorization for bioplastics production, biomass pretreatment, bioplastics biorefineries, and production processes. Specifically, it investigates the concept of transforming waste into wealth with bio-based plastics, the role of bioplastics as substitutes for petroplastics, biodegradable polymers, bioplastics derived from food by-products, and the challenges of bioplastics in aquatic environments.