The aim of this work is to investigate the hydrogen and poly-beta-hydroxybuty rate (PHB) production during the photofermentative treatment of the effluent from a dark fermentation reactor fed with the organic fraction of municipal solid waste. Two different inocula, an adapted culture of Rhodobacter sphaeroides AV1b and a mixed consortium of purple non sulphur bacteria have been investigated under the same operational conditions. Different hydrogen productivities of 364 and 559 N mL H-2 L (1) were observed for the Rhodobacter sphaeroides and the mixed culture consortium tests, respectively: the consortium of PNSB resulted 1.5-fold more productive than the pure culture. On the other hand, Rhodobacter sphaeroides culture showed a higher PHB productivity (155 mg PHB g COD (1)) than the mixed culture (55 mg PHB g COD (1)). In all the tests, the concomitant H-2 and PHB production was associated to a dissolved COD removal higher than 80%. (C) 2016 Elsevier Ltd. All rights reserved.