Energy conversion of biomass crops and agroindustrial residues by combined biohydrogen/biomethane system and anaerobic digestion. (July 2016)

• Record Type: Journal Article
• Authors: Corneli, Elisa; Dragoni, Federico; Adessi, Alessandra; De Philippis, Roberto; Bonari, Enrico; Ragaglini, Giorgio
• Is Part Of: Bioresource technology. Volume 211(2016)
• Page Start: 509
• Page End: 518
• Publication Date: 2016-07
• Subjects: eGR ensiled biomass of Arundo donax L. -- eZM ensiled biomass of Zea mays L. -- eOP ensiled olive pomace -- WB wheat bran -- CS combined system -- AD anaerobic digestion -- DF dark fermentation -- CS_DF first stage of combined system -- CS_AD second stage of combined system -- ER energy recovery -- Rmax maximum daily production rate -- T50 time, expressed in days, when 50% of methane production was reached -- TS total solids -- VS volatile solids -- WSC Water Soluble Carbohydrates -- VFAs short chain volatile fatty acids -- BBP Biochemical Biogas Potential -- BMP Biochemical Methane Potential -- BHP Biochemical Hydrogen Potential -- MC Methane Concentration -- HC Hydrogen Concentration -- NDF Neutral Detergent Fiber -- ADF Acid Detergent Fiber -- ADL Acid Detergent Lignin; Maize -- Giant reed -- Olive pomace -- Wheat bran -- Dark fermentation; 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.2016.03.134
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Biomass rich in non-structural carbohydrates was more suitable for combined system. Wheat bran showed the highest H2 /CH4 potential and energy recovery. Olive pomace and giant reed were unsuitable for combined H2 /CH4 production. 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 18.9 NL kgVS −1 ) and wheat bran the highest methane potential (243.5 NL kgVS −1 ). In one-stage AD, giant reed, maize and wheat bran showed the highest methane production (239.5, 267.3 and 260.0 NL kgVS −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.