1. UNIVERSIDAD REY JUAN CARLOS (Coordinator)
2. BEST – BIOENERGY AND SUSTAINABLE TECHNOLOGIES GMBH
3. STRANE INNOVATION
4. IMPERIAL COLLEGE OF SCIENCE TECHNOLOGY AND MEDICINE
5. FOOD4SUSTAINABILITY – ASSOCIACAO PARA A INOVACAO NO ALIMENTO SUSTENTAVEL
6. EUROPEAN SCIENCE COMMUNICATION INSTITUTE (ESCI) GGMBH
7. FCC AQUALIA SA
8. WATER EUROPE
9. UNIVERSIDAD DE VALLADOLID
10. ANONYMI ETAIREIA DIACHEIRISIS APORRIMMATON PER DYTIKIS MAKEDONIAS
11. TEHNOLOSKI FAKULTET NOVI SAD
12. AIMPLAS – ASOCIACION DE INVESTIGACION DE MATERIALES PLASTICOS Y CONEXAS
13. CLUSTER VIOOIKONOMIAS KAI PERIVALLONTOS DYTIKIS MAKEDONIAS
14. PANEPISTIMIO DYTIKIS MAKEDONIAS
15. ECONWARD TECH, S.L

POST-PURPLE enhances waste treatment sustainability with a purple phototrophic bacteria (PPB)-based photobiorefinery, integrating the organic fraction of municipal solid waste (OFMSW) valorization and a photobioreactor for optimized wastewater treatment and organic fertilizer production. Biogas from OFMSW is used for high-value cosmetic precursors. Challenges like exhaust flows, odors, and inefficiencies, common in photobiorefineries like microalgae-based ones, are addressed through:

- Valorization of Hot Vapors: Utilizing steam explosion hot vapors for a PPB-driven zero-emissions tubular photobioreactor, converting the liquid stream to microbial protein and carotenoids.

- Solid Exhaust Flows Recovery: Repurposing OFMSW treatment rejects for biochar and syngas through an energy-efficient gasification process, serving as carbon/electron sources for PPB growth.

- CO2 Recovery: Extracting CO2 from off-gases during methane oxidation using halotolerant microalgae with added-value compounds and converting CO2 from biogas into methanol.

- Salts Recovery and Recycling: Implementing an electrochemically driven inverse-osmosis system for salts recovery and recycling in ectoine production.

- Biochar Application: Using biochar to abate NOx emissions, treat photobioreactor effluent, and eliminate odors from OFMSW storage.

POST-PURPLE focuses on heat recovery from OFMSW hydrolysis and biomass drying. A heat/mass balance aligned with EU zero emissions policy will optimize recovery. For scale-up feasibility, mass components and heat flows will be analyzed, and a prevention and control digital tool designed using demo-scale operation data. The concept is digitally scaled up based on circularity and sustainability analyses.

To enhance impact, POST-PURPLE involves final users in novel product value chains, and the photobiorefinery concept is exported to other locations, engaging stakeholders such as industrial hubs for potential implementation.

Specialized in waste management through efficient waste collection, treatment, and disposal with an emphasis on recycling and recovering materials, DIADYMA participates in POST-PURPLE within the utilization of waste-to-energy activities. Thereby, DIADYMA contributes to renewable energy generation from waste, promoting sustainability, and reducing environmental impact in the Western Macedonia region. They contribute to EU initiatives by sharing best practices, enhancing material recovery processes, and promoting sustainable waste management solutions that align with green energy goals.