> But your quoted passage describes two non-biological detergents. So did they use a biological detergent or not?
It depends on what experiment in the paper you are looking at.
The supplemental section is addressing the "Laundry detergent tolerance induction assay" (a heading you can ctrl-f for) where they only used the non-biological detergent, "as biological detergent contains enzymes and other potentially disruptive components that may influence the assay".
If you go to the results section you will see results for both the biological and non-biological detergent under "Decontamination efficacy of domestic laundry machines" and so on. I didn't see anything specifying what biological detergents were used.
> Each wash cycle was performed with either biological (14g per kilogram of fabric) or non-biological detergents (20g per wash).
But your quoted passage describes two non-biological detergents. So did they use a biological detergent or not?
Anyway, the first one sounds like Persil liquid:
https://www.ocado.com/products/persil-laundry-washing-liquid...
> 15-30%: Anionic surfactants. 5-15%: Nonionic surfactants. <5%: Perfume, Phosphonates, Soap, Optical brighteners, Methylisothiazolinone, Octylisothiazolinone
And the second one sounds like Persil powder:
https://www.ocado.com/products/persil-fabric-cleaning-washin...
> 5-15%: Oxygen-based bleaching agents, Anionic surfactants. <5% Nonionic surfactants, Polycarboxylates, Soap, Perfume, Optical brighteners, Zeolites, Tetramethyl acetyloctahydronaphthelenes
Not quite the same, but similar. Both are perfectly normal brand-name household laundry detergents.