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In the bioethanol industry, per liter of the produced alcohol 9 to 14 liters of vinasse are obtained as a byproduct. If the vinasse is directly shed into bodies of water without an adequate treatment, it may have negative effects on the existing biota and human health due to its high turbidity and color, low pH and high content of organic material. The purpose of this study was to assess the acute toxicity of vinasse by means of a rapid test with  Aliivibrio fischeri  and compare it with a standard immobilization assay with  Daphnia magna . The standard assay of  D. magna  by means of its EC 50  of 4.7% showed that organism was more sensitive to the contaminant, in comparison with the 69.6% obtained with the A. fischeri which suggests that it should be continuesly used as one of the organisms of first choice for the evaluation of the acute toxicity of this effluent.

Evaluation of acute toxicity of vinasse by means of Daphnia magna and Aliivibrio fischeri: a comparative study