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Characterisation Method Information
Characterisation Method Name:
BOD impact on NEX
Version:
1999
Date Completed:
1999
Principal Method Name:
EPS: equivalency method using N-tot as a reference
Method Description:
NEX is Normalised EXtinction of species.


Model

The characterisation factor is determined by an equivalency method using N-tot as a
reference.

Equivalency factor

According to Lindfors et al. (1995), each mole of nitrogen corresponds to 8.6 mole of
consumed oxygen in a N-limited aquatic system scenario. The equivalency factor is
therefore equal to 14/(8.6*16) = 0.1017 kg N/kg BOD.

Calculation of characterisation factor

The characterisation factor for N-tot is determined in "N-tot impact on NEX" to 1.8E-13 . The characterisation factor for BOD is thus 0.1017*1.8E-13 = 1.83E-14 NEX/kg BOD.
Literature Reference:
Lindfors, L.G.,Christiansen, K., Hoffman, L., Virtanen, Y., Juntilla, V. Leskinen, A., Hanssen, O-J., Rønning, A., Ekvall, T. and Finnveden, G., LCA-Nordic, Technical report No 10, Tema Nord 1995:503, Nordic Council of Ministers, Copenhagen 1994.
Methodological Range:
All lakes, surface waters and oceans on the globe 1990.
Notes:

Existing Characterisation Factors of BOD impact on NEX
Characterisation Parameter Category Indicator Impact Indication Principle Aspect Substance Quantity Unit Notes
CFactor NEX EPS/2000
Type = Emission
Direction = Output
Media = Water
Geography = *
BOD 1.83E-14 NEX/kg