Toxicity of Sewage from Industrial Wastewater Tratment Plants

The aim of this work was to evaluate the ecotoxicity of the waste water from chosen sewage treatment plants. Microtox M500 and Aliivibrio fischeri luminescent bacteria were used for the assessment of toxicity as well as acute tests using aquatic organisms: Daphnia magna crustacea and Chironomus tentans larvae. The performed ecotoxicological tests showed different ranges of sensitivity of living organisms when it comes to the individual types of industrial sewage. The Aliivibrio fischeri bacteria turned out to be the most sensitive bioindicator. In addition, the inclusion of toxicity tests in a wastewater management system in industrial plants will allow the elimination of toxic sewage disposal into the surface water and soil.