Hello! My name is Berenice, I am a Ph.D. student from Mexico and I am currently learning how to use Open LCA.
I am trying to replicate the study of Demichelis et al. (2020), published in the Journal of cleaner production, in order to practice how to do a life cycle assessment of a bioprocess.
The problem is that I have obtained negative results in all impact categories (they should be positive according to Demichelis). I have seen in my project that the inventory results appear negative even when I put them positive. That's why I have a doubt about why they appear like that.
On the other hand, I am wondering if the negative inventory results can be influenced by the mass balance and by the selected type of flow (product, waste, elementary flow). In other words, if the mass balance is wrong, can it affect the inventory results? and can the type of flow affect the results?
Thank you very much.
I wish you all, in advance, Merry Christmas, and a happy healthy new year!