All treatment flows are negatives

Question

Hello, I'm using Open lCA v2.5.0 with ecoinvent 3.9.1 15804 System dedicated database for EPD (FDEs in France)    

We found with the EPD examiner that all treatments flows are negatives. The examiner has the same OpenCLa version and the same method but in Unit. All the treatments flows are positives, rather than negative (values confirmed by ecoquery in Ecoinvent DB). 

What's wrong.

Here is an example of a treatment flow with my DB

And then the examiner results which are the opposite

Wath's wrong ? 

Thanks in adavance

Answer 1

Yes that is because it is a waste treatment process, the inputs and outputs are also all negative apart from waste plastic that is input.

In more recent databases (391 is about 4 years old) we do this in a more elegant way, by setting the impact direction for impact categories.