Characterization of the toxic effects of cadmium and 3.5-dichlorophenol on nitrifying activity and mortality in biologically activated sludge systems-effect of low temperature.

Environmental Science and Pollution Research International
Vaitea PambrunYvan Racault

Abstract

Sometimes, urban wastewaters convey a more or less significant part of toxic products from industries or the craft industry. Nitrifying activity can be affected by these substances, implying higher ammonia concentrations in the outlet effluent and contributing to toxicity for the aquatic environment. Moreover, the more stringently treated wastewater standards now require a reliable treatment for nitrogen. One of the key issues is the identification of the inhibition behavior of nitrifying bacteria facing a toxic substance. This new understanding could then finally be integrated into models in order to represent and to optimize wastewater treatment plants (WWTP) operation in cases involving 'toxic scenarios'. The toxic substances studied in this work, cadmium and 3.5-dichlorophenol (3.5-DCP), are representative of chemical substances commonly found in municipal sewage and industrial effluents and symbolize two different contaminant groups. The effects of Cd and 3.5-DCP on nitrification kinetics have been investigated using respirometry techniques. IC50 values determination gives concentrations of 3.1 mg/L for 3.5-DCP and 45.8 mg/L for Cd at 21 +/- 1 degrees C. The variation to low temperature seems to have no real effect on IC50...Continue Reading

References

Feb 18, 2004·Biotechnology and Bioengineering·R T KellyN G Love
Jun 7, 2005·Bioresource Technology·Alaa H Hawari, Catherine N Mulligan
Sep 1, 2005·Research in Microbiology·Ana Martín-GonzálezJuan Carlos Gutiérrez
Jun 7, 2006·Water Research·Reto ManserHansruedi Siegrist
Jun 9, 2006·Environmental Science and Pollution Research International·Eric Trably, Dominique Patureau

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Citations

May 23, 2009·Environmental Science and Pollution Research International·Peter SchröderChristian Huber
Jun 30, 2010·Environmental Science and Pollution Research International·Ákos RédeyTatiana Yuzhakova
Dec 20, 2012·Environmental Science and Pollution Research International·Paul d'AbzacGilles Guibaud

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