Differences in input and output mass balance ecoinvent 3.10 APOS U

Question

Hi, currently i am using ecoinvent v3.10 APOS Unit-Processes (Superseded Regionalisation database and the dataset folding boxboard carton production | folding boxboard carton | APOS, U - RoW.

When checking the inputs and outputs, the total output is 1 kilogram of Folding boxboard carton therefore, the total raw material should sum 1 kilogram os a little more. But the material with higher contribution if paper, woodfre, coated with 0.088 kilograms and the I sum all the inputs I dont have 1 kilogram. Also in the dataset there are no inputs of Wood chips or pulp as raw material.

Also I Check ecoinvent v3.10 Cut-off and there are inputs such as wood chps and pulp

I would really appreciate if you could tell me the reason of the difference between inputs and total outputs

Regards

Answer 1

Well this seems a question for ecoinvent? Ecoinvent datasets often have a difference in input and output, due to allocation (applying monetary allocation e.g. typically will not retain the mass balance), and data collection / modelling (sometimes, water is not considered, often air in the input of an incineration processes is not considered, etc.).

All the best,

Andreas