A roadmap to transfer knowledge gained on pure culture of purple phototrophic bacteria to the application in non-axenic mixed cultures, including strategies to fill knowledge gaps.

The PurpleGain COST Action aims to connect the stakeholders of the entire value chain from waste streams to end-products propelled by Phototrophic Purple Bacteria (PPB). In this network of excellence, we will make use of the state-of-the-art knowledge and know-how generated at the most prominent European research institutes in the field of PPB-based resource recovery. Scientific, technological, and analytical approaches will be harmonized on this interactive platform to bridge experts of pure-culture and mixed-culture biotechnologies in Europe and overseas. PurpleGain will establish PPB science and technologies at the root of circularity and bio-based economy initiatives driven by the European Union (EU) from thorough scientific to high technology readiness levels (TRL). Through PPB, we will demonstrate the effective operability of bio-based resource recovery across the continuum of pure-culture, co-culture and mixed-culture biotechnologies.
The goal of this roadmap is to elaborate an integrated strategy allowing the transfer of extensive knowledge already available at pure culture level, and addressing fundamental aspects of PPB metabolism, in an industrial context where PPB are used for the development of applied biotechnologies.