European database for cartonboard and carton production, 2023
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27<br />
The reported weighted averages of the fuel consumption <strong>and</strong> emission to air associated<br />
with the <strong><strong>carton</strong>board</strong> <strong>production</strong> are calculated according to method b, as this has<br />
become common practice at the mills. This means that the fuel consumption <strong>and</strong><br />
emissions to air reported in the inventories do not include the <strong>production</strong> of the sold<br />
electricity <strong>and</strong> the amount of the sold electricity is not reported. This was calculated as<br />
follows: the fuel consumption <strong>and</strong> emissions to air associated with the total heat<br />
<strong>production</strong> <strong>and</strong> the net electricity used on site were allocated to the <strong><strong>carton</strong>board</strong><br />
<strong>production</strong><br />
Figure 6<br />
CHP, Combined heat <strong>and</strong> power generation<br />
Diesel or gasoil/LPG used <strong>for</strong> internal transports are also reported in the inventories.<br />
Allocation of energy to paper grades when a mill produces more than one<br />
paper grade<br />
Purchased energy <strong>and</strong> fuels are measured, because they paid <strong>for</strong>. Allocation <strong>for</strong> fuels <strong>and</strong><br />
electricity input is calculated according to energy (heat <strong>and</strong> electricity) required <strong>for</strong> the<br />
<strong>production</strong> of the different paper grades. Allocation of the other fuels, such as diesel oil<br />
used <strong>for</strong> internal transportation, was calculated according to mass <strong>production</strong> of each<br />
paper grade.<br />
Water inputs <strong>and</strong> outputs<br />
When paper mills use water, they do not consume this water during the <strong>production</strong><br />
process. After (re)use it is returned to the rivers, lakes or seas as cooling water <strong>and</strong><br />
purified effluent water. A limited amount of water is evaporated (about 1-1.5 m3/tonne<br />
nsp) in the drying section of the paper <strong>production</strong>. The water debate focuses on the<br />
impact of water consumption. This is best reflected in the local water availability rather<br />
than in the amount of water taken into the mills. There<strong>for</strong>e, the appropriate indicator is<br />
the net difference of water taken in <strong>and</strong> water returned to the rivers or lakes (water<br />
consumed, not taken in).<br />
© RISE Research Institutes of Sweden
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