Fradinho, JoanaAllegue, L. D.Ventura, M.Melero, J. A.Reis, Maria A. M.Puyol, D.2021-09-212021-09-212021-050960-8524PURE: 28248318PURE UUID: f44ab800-5b2d-4fd8-9400-b0a42456677dScopus: 85100449631PubMed: 33578354WOS: 000634862600006http://hdl.handle.net/10362/124883Financial support from the Regional Government of Madrid through the project S2018/EMT-4344 BIOTRES-CM is gratefully acknowledged. D. Puyol wishes to thank the Spanish Ministry of Economy for the Ramon y Cajal grant. J. FThe increasing volume of waste streams require new biological technologies that can address pollution concerns while offering sustainable products. Purple phototrophic bacteria (PPB) are very versatile organisms that present a unique metabolism that allows them to adapt to a variety of environments, including the most complex waste streams. Their successful adaptation to such demanding conditions is partly the result of internal polymers accumulation which can be stored for electron/energy balance or as carbon and nutrients reserves for deprivation periods. Polyhydroxyalkanoates, glycogen, sulphur and polyphosphate are examples of polymers produced by PPB that can be economically explored due to their applications in the plastic, energy and fertilizers sectors. Their large-scale production implies the outdoor operation of PPB systems which brings new challenges, identified in this review. An overview of the current PPB polymer producing technologies and prospects for their future development is also provided.1951452engAnoxygenic photosynthesisPhotobioreactorsPolyhydroxyalkanoatesPolyphosphatePurple phototrophic bacteriaBioengineeringEnvironmental EngineeringRenewable Energy, Sustainability and the EnvironmentWaste Management and DisposalSDG 7 - Affordable and Clean EnergySDG 2 - Zero Hungerreview10.1016/j.biortech.2021.124820https://www.scopus.com/pages/publications/85100449631