EFFECT OF SURFACTANTS ON DENITRIFICATION PROCESS IN BIOLOGICAL MUNICIPAL WASTEWATER TREATMENT
Abstract
The biological nutrient removal is realized by wastewater treatment in anoxic, aerobic bioreactors. The amphiphilic xenobiotics groups of surfactants with membranotropic properties are affected on the activated sludge microorganisms and wastewater treatment efficiency from organic contaminants. In this article, the authors studied the effect of surfactants on denitrification in wastewater anoxic conditioning. The dependencies of denitrification kinetics in anoxic bioreactors by varying the concentration of surfactants in wastewater are determined. The increasing concentrations of surfactants in wastewater to 30 mg/l leads to a delay the moment of flotation of activated sludge to 60% in anoxic conditions without mixing of activated sludge. The increasing the concentration of surfactants in wastewater to 30 mg/l leads to lower average specific denitrification rate by 48% is determined according to the results of experiments in dynamic conditions.Keywords: surfactants, denitrification, active sludge, treatment, technology, wastewater, kinetics, concentration.
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