I am doing a system expansion of my LCA using the cut off ecoinvent database and one of the products of it is biowaste. I would like to model the following:
biowaste -> compost -> nitrogen fertiliser
I found the following processes in Ecoinvent:
treatment of biowaste, industrial composting | compost
nutrient supply from compost | nitrogen fertiliser, as N
However I am struggling to connect these processes to obtain my final product "nitrogen fertiliser", as 'treatment of biowaste, industrial composting | compost" is empty in inputs and only has in outputs the flow "compost" (see attached screenshot). So I don't know how much compost is actually produced with the process. Is there a way to find out? Or am I using the wrong database?