Carter, Mette S.; Hauggaard-Nielsen, Henrik; Johansen, Anders and Ambus, Per (2009) Consequences of agro-biofuel production for greenhouse gas emissions. In: NJF Report, Vol. 5, No 3, NJF General Secretariat, Stockholm, Sweden, pp. 34-35.
- Published Version
Currently CO2 from fossil fuel combustion accounts for 57% of the global greenhouse gas emissions, whereas the strong greenhouse gases nitrous oxide (N2O) and methane (CH4) contribute with 8% and 14%, respectively (IPCC, 2007). Agricultural activity is the dominant source of N2O, which is mainly associated with the use of nitrogen based fertilizers in agricultural production. Replacing fossil fuel-derived energy by biomass-derived energy is commonly and with increasing emphasis proposed as a mean to mitigate the CO2 emissions. However, a recent analysis of global emission data proposes that accelerated emissions of N2O associated with the production of biomass for bio-fuel purposes will outweigh the avoided emissions of fossil fuel-derived CO2 (Crutzen et al., 2008).
In the present study we examined the effects on N2O and CH4 emissions when residues from bio-energy production were recycled as fertilizer for a maize energy crop within an organic cropping system. Furthermore, we assessed sustainability in terms of greenhouse gasses for co-production of bio-ethanol and bio-gas from maize. This was compared to estimated greenhouse gas balances for rye and grass-clover as alternative raw materials.
|EPrint Type:||Conference paper, poster, etc.|
|Type of presentation:||Paper|
|Keywords:||Biogas; Bioethanol; Anaerobic digestion; Slurry; Maize; Winter rye; Grass-clover; N2O; CH4;|
|Subjects:|| Soil > Nutrient turnover|
Food systems > Recycling, balancing and resource management
Environmental aspects > Air and water emissions
Crop husbandry > Composting and manuring
|Research affiliation:||Denmark > DARCOF III (2005-2010) > BIOCONCENS - Biomass and bio-energy production in organic agriculture|
|Deposited By:||Carter, Mette Sustmann|
|Deposited On:||17 Mar 2010 12:24|
|Last Modified:||30 Aug 2011 10:35|
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