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Hi, 

I'm Silu Pei, new to OpenLCA and impressived by its powerfull functionalities.

Right now, I'm modeling a waste incineration plant which comprises of a incinerator, an air pollution control (APC) system and a wastewater treatment plant (WWTP) arranged in series. However, the effluent (waste flow) from APC does not connect to WWTP and I can't mannually connect by set provider nor drag. The catlog when I'm trying to set provider is presented as below.

Is there any solution to this problem? Your help would be much appreciated!

in openLCA by (130 points)
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1 Answer

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by (22.6k points)
Hi! Your problem seems to have something to do with provider linking: https://ask.openlca.org/585/what-is-provider-linking-when-creating-a-new-product-system?show=585#q585

Make sure that the output of the effluent (waste flow) from APC (its quantitative reference) is an input to the process WWTP. Select the former as the default provider for the latter and select 'prefer default providers' during product systems creation.

I hope this helps.
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