Review on the fate of emerging contaminants during sludge anaerobic digestion

► Several emerging contaminants (ECs) have been detected in sludge. ► For most of them, available data for their fate and effects on AD is yet limited. ► Factors enhancing biotransformation are not the same for all ECs. ► A deeper understanding of the role of sorption on ECs removal is required. ► Combination of AD with other sludge treatment processes could enhance ECs removal.