h i g h l i g h t s
• Different methods for toxicity assessment inWWwere critically reviewed.
• Laboratory standardization of the anaerobic ATA assay is urgently needed.
• Biosensor matrix or a biosensor with multiple reporter organisms needed for real WW.
• MFC-based biosensors need correlation with traditional assays in real WWs.
• On-line data processing methods need to be developed to interpret data from sensors