Biodegradation of atrazine from wastewater using moving bed biofilm reactor under nitrate-reducing conditions: A kinetic study

Journal of Environmental Management
Zahra DerakhshanShima Bahrami

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.

Citations

Aug 16, 2019·Environmental Technology·Luís Fernando CusioliRosângela Bergamasco
Jul 18, 2020·Water Environment Research : a Research Publication of the Water Environment Federation·Sara MollamohammadaMohamed Dahab
Dec 15, 2020·Journal of Environmental Health Science & Engineering·Mansour GhaderpooriReza Rezaee
Mar 19, 2019·Journal of Environmental Management·Bahareh HassanpourTammo S Steenhuis
Sep 29, 2021·Environmental Research·Mansooreh DehghaniGea Oliveri Conti

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