Figure S1: Relative portion of the emergy value of flows lost due to the threshold level applied in SCALE and the loop violation.
SI2: Comparative table of UEVCONV, UEVSCALE and SED of technospheric inputs
Table S1 lists the Unit Emergy Values (UEVs) calculated for the materials used by the WTPs and the production and regeneration of activated carbon (Arbault et al., 2013). UEVsSCALE are calculated with a minflow of 1E-4 Msej (considering the high number of products, lower threshold values e.g. 1E-5 Msej would have drastically increased the overall calculation time).
An important point, extensively discussed in the supplementary materials of Rugani et al. (2011), concerns the SEF of mineral sodium chloride (NaCl): the value in the original publication is 9.89 E13 sej/kg (baseline 9.26), which is two orders of magnitude higher than the reference UEV found in literature (9.81 E11 sej/kg, Odum, 1996, converted to baseline 9.26). Considering the high importance of NaCl in the technosphere, results highly depend on the choice of this value. The results presented below, both for SED and EMESCALE, are calculated with the UEV of mineral sodium chloride 9.81 E11 sej/kg.
The table also includes ammonia (produced with two distinct technologies) and liquefied oxygen. Data of Table S1 were built under the following considerations:
-
the minflow value of the retrieved UEVsSCALE is 1E-4 Msej.
-
The SEF (and UEVSCALE) of mineral NaCl was modified from 9.89 E12 to 9.81 E10 sej/kg, according to the rationale provided in Rugani et al. (2011, supplementary material).
-
UEVCONV of electricity for UCTE (Union for the Co-ordination of Transmission of Electricity) was calculated following the procedure of Arbault et al. (2013) for electricity in France, but with the UCTE production mix (Table S2).
-
When UEVCONV were approximated with SED in Arbault et al. (2013), no data were reported in Table S1’s EMECONV column.
Dostları ilə paylaş: |
