Open AccessMunicipal Waste Water Toxicity Evaluation with Vibrio Fisheri
Author(s) -
Helena Raclavská,
Jarmila Drozdová,
Silvie Hartmann
Publication year - 2021
Publication title -
international journal of energy and environment
Language(s) - English
Resource type - Journals
ISSN - 2308-1007
DOI - 10.46300/91012.2021.15.7
Subject(s) - ecotoxicity , daphnia magna , sewage , environmental chemistry , ec50 , wastewater , vibrio , environmental science , toxicity , acute toxicity , sewage sludge , organic matter , chemistry , toxicology , biology , environmental engineering , ecology , bacteria , biochemistry , organic chemistry , in vitro , genetics
Toxicity of municipal waste water observed by means of Vibrio fischeri proved a primary dependence between the content of organics and inhibition. A linear dependence between COD and inhibition determined by means of Vibrio fischeri was established. In 30 days following sampling organic matter was degraded and the value of inhibition fell from 80 % to 27.67 %. This value corresponds to the real impact of micropollutants (risk elements, organic micropollutants) on inhibition. The content of risk elements in municipal waste water implies that the values are significantly higher than EC50 defined for Daphnia magna. Risk element ecotoxicity is affected by the form of occurrence and it is thus probable that there are risk elements predominantly in the form of complexes in sewage water.