http://oar.icrisat.org/id/eprint/11194 2020-01-23T08:31:00Z info:eu-repo/semantics/descriptiveMetadata http://oar.icrisat.org/11194/ Effect of macro- and micro-nutrients addition during anaerobic mono-digestion of grass silage in leach-bed reactors Jagadabhi, P S Kaparaju, P Väisänen, A Rintala, J Others The effect of macro- (NH4Cl) (set I) and micro-nutrients (Fe, Ni, Co and Mo) (set II) addition on chemical oxygen demand (COD) solubilisation during anaerobic mono-digestion of grass silage was investigated in two sets of leach bed reactor experiments at 35°C. Results showed that addition of NH4Cl and micro-nutrients improved COD solubilisation by 18% (0.56 g SCOD g−1 volatile solids) and 7% (0.45 g SCOD g−1 VS), respectively than control. About 20–50% of the added micro-nutrients were bioavailable in the produced leachates, while the rest (50–80%) were adsorbed onto the grass silage. Results of biological methane potential assays showed that, specific methane yields of grass silage were improved by 17% (0.36 ± 0.02 m3 CH4 kg−1 VSadded) when NH4Cl was supplemented while Fe, Ni, Co and Mo addition improved methane yields by 15% (0.33 ± 0.005 m3 CH4 kg−1 VSadded) when compared to control. Taylor & Francis 2019 Article PeerReviewed Jagadabhi, P S and Kaparaju, P and Väisänen, A and Rintala, J (2019) Effect of macro- and micro-nutrients addition during anaerobic mono-digestion of grass silage in leach-bed reactors. Environmental Technology (TSI), 40 (4). pp. 418-429. ISSN 0959-3330 https://doi.org/10.1080/09593330.2017.1393462 10.1080/09593330.2017.1393462 info:eu-repo/semantics/humanStartPage