engleski

Use of prokaryotic and eukaryotic biotests to assess toxicity of wastewater from pharmaceutical sources

The yeast toxicity test (YTT), based on the inhibition of saccharose fermentation by the yeast Saccharomyces cerevisiae, was evaluated using standard toxicants (copper sulphate, formaldehyde, sodium nitrite, sodium sulphite, phenol and zinc sulphate). Repeated measurements of YTT accuracy with the standard toxicants showed EC50 values characterized by low standard deviation and coefficient of variation (7.62%). Moreover, the YTT was compared to standard prokaryotic biotests by estimating the toxicity of wastewater from pharmaceutical sources. The toxicity of wastewaters measured by YTT agrees sufficiently with those measured by standard methods of the determination of toxicity such as inhibition of bioluminescence, TTC-dehydrogenase activity, aerobic bacterial growth and anaerobic sludge biogas production. The YTT is a rapid, simple, reliable, sensitive and cost-effective method for presumptive estimations of the toxicity of wastewaters, which could be performed in laboratory as well as in field conditions.

biotest; pharmaceutical wastewater; Saccharomyces cerevisiae; yeast; toxicity test.

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