This project develops circular value chains for the biopolymers cellulose and PHA. Previous developments in the biobased economy often originated from raw materials and technology; this project focuses on the market and application side of developing biopolymer applications that the market demands and which are of added economic, environmental and social value. A key element in work package 1 is the non-technical aspects of the biobased economy: economic, environmental, strategic and design aspects and legal frameworks are reviewed. In addition to the technical and content challenges set out in Work Packages 2 and 3, the potential risks, opportunities and trade-off frameworks for the companies concerned will be identified and promising routes will be well-founded in valorisation pathways. The relationship between technology and market will need to be developed more strongly. Technology that stays “hanging” in the lab, we shouldn't do it for that. This means that research institutions need to complement each other in the TRL line and interdisciplinary cooperation in different disciplines — not only technology, but also from the market, society and the environment. This is done within the BERNN partnership and from BERNN the collaboration with the (SME) industry is sought directly in this project to further promote the flow of developed knowledge and expertise. The knowledge development project aims to achieve a breakthrough within the chain in the scaling up of production of innovative biopolymers from residual flows. From the market, there is a strong demand from consumers and brand owners for fully sustainable and CO2-saving bioplastics. Unfortunately, the market cannot be provided for this at the moment because there are no good production technologies and/or value pathways for processing the polymers for high-quality applications with good product properties. The processing of PHAs and celluloses from residual flows into high-quality (niche) products leads to the realisation of innovative value chains in the Netherlands and thus to sustainable economic activities and associated employment in the Netherlands in order to carry out these activities. The participating companies are developing new knowledge necessary for the further development of innovative products. Within the project, important new steps will be taken in line with previous initiatives focusing mainly on one production link in the chain. This project offers a concrete perspective for economic neglect of residual flows in the north of the Netherlands to the biopolymers PHA and cellulose, thereby giving a more in-depth insight into the possibilities for future scale-up to production scales.