In situ-immobilization of two model cyanobacterial strains in ceramic structures: A new biohybrid material for photobioreactor applications

•Cyanobacteria were successfully immobilized within magnesium phosphate cements.•The survival of the cyanobacteria was effected by the hydraulic setting reaction.•Viability and photoactivity could be maintained for at least 4 weeks. Two cyanobacterial strains, Synechocystis sp. PCC 6803 and Nostoc punctiforme ATCC 29133 were immobilized within magnesium phosphate based cements, showing a viability and activity for at least 4 weeks. These biohybrids are considered as an alternative photobioreactor material for bioremediation or an improved yield of biotechnologically relevant molecules.