Highlights
- •The role of GAC addition and voltage application in thermophilic AD was examined.
- •GAC addition enhanced biogas production and decreased dissolved COD and VFAs.
- •PFAS sorption amplified by more C atoms and sulfonated headgroup presence.
- •Moderate removal (35–61%) for 4 out of 6 PFAS in bioreactors with GAC.
- •Increase of Acinetobacter suggest its pivotal role in PFAS biotransformation.
