Photofermentative production of hydrogen and poly-β-hydroxybutyrate from dark fermentation products. (March 2017)

• Record Type: Journal Article
• Authors: Luongo, Vincenzo; Ghimire, Anish; Frunzo, Luigi; Fabbricino, Massimiliano; d'Antonio, Giuseppe; Pirozzi, Francesco; Esposito, Giovanni
• Is Part Of: Bioresource technology. Volume 228(2017)
• Page Start: 171
• Page End: 175
• Publication Date: 2017-03
• Subjects: Biohydrogen -- Poly-β-hydroxybutyrate -- Photofermentation -- Dark fermentation -- Biorefinery; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2016.12.079
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Photofermentative treatment of a dark fermentation effluent is investigated. Performances of a R. sphaeroides and a mixed PNSB culture are compared. The mixed culture results more efficient in H2 production (233.8 N mL H2 g COD −1 ). The pure culture shows a higher PHB productivity (155 mg PHB g COD −1 ). High soluble COD removal from DFE is achieved (>80%). Abstract: The aim of this work is to investigate the hydrogen and poly-β-hydroxybutyrate (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 H2 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 H2 and PHB production was associated to a dissolved COD removal higher than 80%.