SOLSTICE aims at demonstrating 4 replicable systemic solutions for the territorial deployment of the circular economy (CEC) for the major industrial sector of textiles (62Mt produced/year). All steps of waste prevention and management will be included in a 5R strategy: Refuse/Reduce, Reuse, Repair, Repurpose, Recycle. The solutions developed can be replicated and cross-linked with the plastics value chain. SOLSTICE will: • Develop tools and strategies to implement the 5R approach: oFor the 4R Refuse/Reduce, Reuse, Repair, Repurpose: - Engage the different stakeholders (industrial companies, local authorities, citizens) to revise their supply chains / behaviour, and become more sober, circular and sustainable. - Scope and map current state, carry research on and analysis of relevant circular interventions per territory, - Create a methodology and blueprints of CEC interventions to be tested/piloted - Define circular guidelines and indicators oRecycle: Demonstrate innovative chemical recycling technologies, able to treat efficiently part of the major streams of polymers in textiles and plastics (PET, elastane, polyamide, polyurethane) in mild conditions. The technologies allow to recycle multicomponent and bio-based materials, complex streams, and to recycle textile into textile or coating into coating (closed-loop) or into added-value applications (open loop). They are easily adaptable and allow a local recycling. • Set-up a traceability system based on a Digital Product Passport and designed in relation to existing initiatives. The demonstration will take place in 4 EU representative and complementary territories. Knowledge-transfer and cooperation between the cities and regions involved, and with CCRI and other stakeholders and projects, will ensure an optimised development and deployment of the new circular concepts, as well as the replicability of the concept and a maximal impact. The deployment of SOLSTICE could save 4.3-10.8 Mt GHG emissions/year by 2030.

Europe's position in the production of biochemicals from biomass and by-products is limited to a few compounds, while their demand is among the largest in the world. However, Europe has a lot of world leader chemical companies. On the other hand, lignocellulosic waste constitutes one of the most abundant resources without competing with food chain. REHAP’s 16 partners aim at revalorizing agricultural (wheat straw) and forestry (bark) waste through its recovery, and primary (sugars, lignin, tannins) and secondary (sugar acids, carboxylic acids, aromatics and resins) processing to turn them into novel materials, and considering Green Building as business case. The project will provide reductions in utilization of fossil resources of 80-100%, and energy utilization and CO2 emissions above 30%. Specifically, building blocks (1,4 and 2,3-Butanediol, estherpolyols), materials (PUs, phenolic resins, modified hydrolysis lignin) and products (wooden boards, insulation foams, cement, adhesive) will be obtained: • Isolation of tannins and carbohydrates from forestry waste to turn them into bio-phenolic resins for wooden panels and isocyanate-free polyurethanes (PU) for insulating foams, respectively. • Isolation of lignin and carbohydrates from agricultural waste to turn them into bio-phenolic resins for wooden panels and biosuperplasticizers for cement, and estherpolyol PU for adhesives, respectively. • Fire retardant lignin and sugar-based additives will be also developed. Developed processing technologies (chemo/thermo/enzymatic and fermentation) will be optimized at pilot scale (TRL6-7) for further exploitation and replication of results. All products will be integrated in a prototype to demonstrate industrial applicability into the Green Construction sector. Throughout the project, Life Cycle and Cost Assessment, market analysis, business plan, waste management strategy and measures for future standardization will be implemented using a systemic perspective approach.