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Above ground part of common reed to enhance anaerobic co-digestion of farm biomasses: Potential, monitoring and efficiency
- Riggio, Vincenzo A., Comino, Elena, Rosso, Maurizio
- Ecological engineering 2015 v.79 pp. 35-41
- Phragmites australis, aboveground biomass, aerial parts, anaerobic digestion, biogas, cattle manure, cheese whey, chemical oxygen demand, farms, methane, methane production, monitoring, phytoremediation
- This paper shows that common reeds used in phytoremediation plants can be successfully disposed of in anaerobic digestion reactors. At mesophilic condition the following were investigated: biogas yield resulting from an anaerobic co-digestion campaign of mixtures of cattle slurry, cheese whey and aboveground biomass of Phragmites australis, rates of production of methane, removal efficiencies of chemical oxygen demand (COD) and bio-methane yield (BMY). The resulting concentration of methane in the biogas was between 53 and 56%. Maximum removal efficiencies for COD was 70%. The mixture of 50% cattle slurry, 40% cheese whey and 10% of aboveground parts of P. australis achieved an organic loading rate (OLR) of 3.3g-VS/l-d with a methane yield of 241l-CH4/kg-VS. A high digestate methane potential with a high OLR in the feed was also tested, with a result of 219l-CH4/kg-VS.