Evaluation of Bioassays and Wastewater Quality ... - Oekotoxzentrum

Biological and powdered activated carbon –UF treatment
Treatment of the wastewater with PAC-UF led to an additional 61 to 100 % elimination of the
remaining specifically-acting substances when compared to the removal in the biological
treatment (Figure 5).
Green algae: photosynthesis inhibition
Green Green algae: grow th inhibition
YES YES assay: assay: estrogenic estrogenic effects effects
ER ER CALUX: CALUX: estrogenic estrogenic effects effects
AR AR CALUX: CALUX: androgenic androgenic effects
GR GR CALUX: CALUX: glucocorticoid like effects
PR PR CALUX: CALUX: progesterone progesterone like effects effects
PPARg1 PPARg1 CALUX CALUX
-385 ± 196 %
-20% 0% 20% 40% 60% 80% 100%
Elimination Biological Treatment
Green algae: photosynthesis inhibition
Green algae: grow th inhibition
YES assay: estrogenic effects
ER CALUX: estrogenic effects
AR CALUX: androgenic effects
GR CALUX: glucocorticoid like effects
PR CALUX: progesterone like effects
PPARg1 CALUX
0% 20% 40% 60% 80% 100%
Elimination
Biological + PAC-UF Treatment
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n
n
s
s
s
s
s
X
0% 20% 40% 60% 80% 100%
Elimination PAC-UF Treatment
Figure 5: Mean elimination efficiency for specific effects measured in in vitro bioassays in the different
treatment steps: biological, PAC-UF and biological + PAC-UF treatment (mean ± SD of 2 nd to 4 th measurement
campaign).
The combination of biological and PAC-UF treatments removed all of the specifically-acting
substances to more than 80 % (elimination efficiencies ranged from 92 to 100 %).
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