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

Zahra Derakhshan; Mohammad Hassan Ehrampoush; Amir Hossein Mahvi; Mohammad Taghi Ghaneian; Seyed Mohammad Mazloomi; Mohammad Faramarzian; Mansooreh Dehghani; Hossein Fallahzadeh; Saeed Yousefinejad; Enayat Berizi; Shima Bahrami

doi:10.1016/j.jenvman.2018.02.043

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

J Environ Manage. 2018 Apr 15:212:506-513. doi: 10.1016/j.jenvman.2018.02.043. Epub 2018 Feb 22.

Affiliations

¹ Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran; Student Research Committee, Shahid Sadoughi University of Medical Sciences, Yazd, Iran; Department of Environmental Health, School of Health, Larestan University of Medical Sciences, Larestan, Iran.
² Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
³ Center for Solid Waste Research (CSWR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran; Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. Electronic address: ahmahvi@yahoo.com.
⁴ Nutrition Research Center, Department of Food Hygiene and Quality Control, School of Nutrition and Food Sciences, Shiraz University of Medical Sciences, Shiraz, Iran.
⁵ Research Center for Health Sciences, Department of Environmental Health, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran.
⁶ Prevention and Epidemiology of Non-Communicable Disease Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.
⁷ Research Center for Health Sciences, Department of Occupational Health Engineering, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran.

PMID: 29477120
DOI: 10.1016/j.jenvman.2018.02.043

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 (U_max = 9.87 g_ATZ/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.

Keywords: Anoxic condition; Anoxic moving bed biofilm reactor; Atrazine; Biodegradation; Herbicides.

MeSH terms

Atrazine*
Biodegradation, Environmental*
Biofilms
Bioreactors
Waste Disposal, Fluid
Wastewater*
Water Pollutants, Chemical
Water Purification*

Substances

Waste Water
Water Pollutants, Chemical
Atrazine