title: Energy conversion of biomass crops and agroindustrial residues by combined biohydrogen/biomethane system and anaerobic digestion.
abstract: Aim of this study was to evaluate the suitability of ensiled giant reed, ensiled maize, ensiled olive pomace, wheat bran for combined systems (CS: dark fermentation+anaerobic digestion (AD)) producing hydrogen-rich biogas (biohythane), tested in batch under basic operational conditions (mesophilic temperatures, no pH control). Substrates were also analyzed under a single stage AD batch test, in order to investigate the effects of DF on estimated energy recovery (ER) in combined systems. In CS, maize and wheat bran exhibited the highest hydrogen potential (13.8 and 18.9NLkgVS(-1)) and wheat bran the highest methane potential (243.5NLkgVS(-1)). In one-stage AD, giant reed, maize and wheat bran showed the highest methane production (239.5, 267.3 and 260.0NLkgVS(-1)). Butyrate/acetate ratio properly described the dark fermentation, correlating with hydrogen production (r=0.92). Wheat bran proved to be a promising residue for CS in terms of hydrogen/methane potential and ER.
authors.affiliation: Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy. Electronic address: e.corneli@sssup.it.
authors.forename: Elisa
authors.initials: E
authors.lastname: Corneli
authors.affiliation: Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy.
authors.forename: Federico
authors.initials: F
authors.lastname: Dragoni
authors.affiliation: Institute of Chemistry of Organometallic Compounds (ICCOM), CNR, Florence, Italy.
authors.forename: Alessandra
authors.initials: A
authors.lastname: Adessi
authors.affiliation: Institute of Chemistry of Organometallic Compounds (ICCOM), CNR, Florence, Italy; Department of Agrifood Production and Environmental Sciences, University of Florence, Italy.
authors.forename: Roberto
authors.initials: R
authors.lastname: De Philippis
authors.affiliation: Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy; CRIBE - Centro di Ricerche Interuniversitario Biomasse da Energia, Via Vecchia Livornese 748, 56122 Pisa, Italy.
authors.forename: Enrico
authors.initials: E
authors.lastname: Bonari
authors.affiliation: Institute of Life Sciences, Scuola Superiore Sant'Anna, Piazza Martiri della Libertà 33, 56127 Pisa, Italy; CRIBE - Centro di Ricerche Interuniversitario Biomasse da Energia, Via Vecchia Livornese 748, 56122 Pisa, Italy.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Ragaglini
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D018533:Biomass; D019149:Bioreactors; D003246:Conservation of Energy Resources / Q000379:methods*; D018556:Crops, Agricultural / Q000737:chemistry*; D004043:Dietary Fiber / Q000378:metabolism; D004063:Digestion; D005285:Fermentation; D006859:Hydrogen / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D008697:Methane / Q000032:analysis / Q000096:biosynthesis* / Q000737:chemistry; D031658:Olea / Q000378:metabolism; D006109:Poaceae / Q000378:metabolism; D003313:Zea mays / Q000737:chemistry / Q000378:metabolism
chemical_list: D056804:Biofuels; D004043:Dietary Fiber; D006859:Hydrogen; D008697:Methane
keywords: Dark fermentation; Giant reed; Maize; Olive pomace; Wheat bran