AI Article Synopsis
- The study explored how adding macro-nutrients (NHCl) and micro-nutrients (Fe, Ni, Co, Mo) influences chemical oxygen demand (COD) during anaerobic digestion of grass silage at 35°C.
- Adding NHCl increased COD solubilisation by 18%, while micro-nutrients improved it by 7% compared to a control group.
- The research also found that NHCl and micro-nutrient additions boosted methane production by 17% and 15%, respectively, highlighting their importance in enhancing biogas yield.
Article Abstract
The effect of macro- (NHCl) (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 NHCl and micro-nutrients improved COD solubilisation by 18% (0.56 g SCOD g volatile solids) and 7% (0.45 g SCOD g 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 m CH kg VS) when NHCl was supplemented while Fe, Ni, Co and Mo addition improved methane yields by 15% (0.33 ± 0.005 m CH kg VS) when compared to control.
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| http://dx.doi.org/10.1080/09593330.2017.1393462 | DOI Listing |
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