waste water treatment

Question

Hello, I'm a new user of OpenLCA. I'm currently analyzing data related to electricity usage in wastewater treatment using OpenLCA 2.5.0 with the Ecoinvent 3.3 database. 

In my case study, for example, in one process, let's call it equalization, I will enter input data in the form of electrical energy and output data in the form of CO2 and CH4. What flow and reference flow should I choose? And when calculating using ecoinvent LCIA, the impact analysis graph does not appear. What should I do?.

thank you

Answer 1

the reference flow is typically the main product of a process, which can be a service or a specific product. "equalisation" is of course somewhat fuzzy, it could be "buffered water" as output e.g.?

Ah and I do not get what you mean by 

the impact analysis graph does not appear.