+1 vote
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Hello,

There is a dataset "soda bicarbonate" in the flows list of ecoinvent v.3.4 and it can be added to processes but there are neither providers, nor uses associated with this entry. If I use it in calculations, it does not form any contribution to the impacts. Also, I checked the ecoinvent database online and there is no such dataset (there are other similar - soda ash, etc.).

Is it an empty dataset deleted from older econvent versions or is it corrupted only in my downloaded zolca file?

Thank you,

Yana
in openLCA by (260 points)
recategorized by

1 Answer

+1 vote
by (22.9k points)
Hi Yana, I cannot find a flow "soda bicarbonate" in my version of ecoinvent 3.4 (cut-off) UP. Possibly, it is a remnant from an older version of ecoinvent or you accidentally imported the flow with another data set into your database.

Btw.: The data set is not "empty". It is just not used anywhere. You can check this by right-clicking on the flow in the navigation window and selecting "Usage". If you want, you can add the flow manually to an existing impact category of a LCIA method in your database or create a new LCIA method that captures this flow. If it is a product flow you can also select it as a quantitative reference of processes that you create yourself.

I hope this helps.
by (260 points)
Thank you for your answer, your comment is helpful. When I check the Usage, only the processes I created appear, so yes, your're right it is not used anywhere.

I forgot to mention that I am using the ecoinvent through the EuGeos' db. Sodium bicarbonate (ID = 033be19b-ca83-4d9e-8dd6-476ef15203cd) is a component in a production process I am modelling and is the only dataset to which I cannot assign provider and I checked that it is only present in the flows, but it is not in the processes.

As I do not see a contribution to any impact, I wonder if it is included in the calculations at all. The chemical elements from the production of sodium bicarbonate are already added in the LCIA method.

Yana
by (22.9k points)
You can check the tab "LCIA checks" upon calculating. It lists flows that have not been considered by the LCIA method.
by (260 points)
Thank you very much. It appears the sodium bicarbonate is not included in the calculations, so I'll have to go without it.
by (22.9k points)
... or add it to a new or existing LCIA method manually
by (22.9k points)
... or add it to a new or existing LCIA method manually "If you want, you can add the flow manually to an existing impact category of a LCIA method in your database or create a new LCIA method that captures this flow. "
by (260 points)
edited by
Thank you, I tried to do this but I do not know what impact factors to assign.

PS I found and EPD about sodium bicarbonate and used the values given there. Not sure how relyful this approach is, though...
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