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Biodegradation of Atrazine From Wastewater Using Moving Bed Biofilm Reactor Under Nitrate-Reducing Conditions: A Kinetic Study Publisher Pubmed



Derakhshan Z1, 2, 3 ; Ehrampoush MH1 ; Mahvi AH4, 5 ; Ghaneian MT1 ; Mazloomi SM6 ; Faramarzian M7 ; Dehghani M7 ; Fallahzadeh H8 ; Yousefinejad S9 ; Berizi E6 ; Bahrami S7
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Source: Journal of Environmental Management Published:2018


Abstract

In this study employed an anoxic moving bed biofilm reactor (AnMBBR) to evaluate the effects of hydraulic and toxic shocks on performance reactor. The results indicated a relatively good resistance of system against exercised shocks and its ability to return to steady-state conditions. In optimal conditions when there was the maximum rate of atrazine and soluble chemical oxygen demand (COD) removal were 74.82% and 99.29% respectively. Also, atrazine biodegradation rapidly declines in AnMBBR from 74% ± 0.05 in the presence of nitrate to 9.12% only 3 days after the nitrate was eliding from the influent. Coefficients kinetics was studied and the maximum atrazine removal rate was determined by modified Stover & Kincannon model (Umax = 9.87 gATZ/m3d). Results showed that AnMBBR is feasible, easy, affordable, so suitable process for efficiently biodegrading toxic chlorinated organic compounds such as atrazine. Also, its removal mechanism in this system is co-metabolism. © 2018 Elsevier Ltd
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