6. Choosing the most appropriate off-gas treatment system

6.1 Preferential ranking of different options

Analysis of the absolute results for NEB _N and lgEYE shows that the values obtained are too close to be significant, although there is a slight preference for biofiltration. In this study, however, there is a good correlation between the results, as the same data were used, and the same impact analysis was carried out.

For this reason, it is more appropriate to consider the relative difference between the indicators, which will represent a more meaningful estimate (e.g. Δ NEB _{N Bio-OxCat} ), as it takes this correlation into account. If these differences (Δ NEB _N and Δ lgEYE) are...