theFig. 6. Toxicity assessment based on inhibitory effects on yeast growth (A) or increased expression of the yeast toxicity-indicator genes GRE2, RAD54 and RNR3 (B) of samplescollected at the onset of the reaction phase (WW0), at the end of the anaerobic reaction (WWanaer), and at the end of aeration (WWfinal), compared to feed solution withoutdye (control sample, WWcontrol), in two representative FSBR1 cycles (day 21 or day 29). Error bars represent +1 standard deviation.