Effect of molasses addition as biodegradable material on phenol removal under anaerobic conditions
1 Department of Environmental Health Engineering, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
2 Ecole Nationale Sup rieure de Chimie de Rennes, Universit de Rennes 1, CNRS, UMR 6226, Rennes, Avenue du G n ral Leclerc, CS 50837, 35708 Rennes Cedex 7, France.
3 Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
4 Social Determinants of Health Research center, Ardabil University of Medical Sciences, Ardabil, Iran
5 Research Center for Environnemental D terminants of Heath (RCEDH), D partment of Biostatistics and Epidemiology, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
2 Ecole Nationale Sup rieure de Chimie de Rennes, Universit de Rennes 1, CNRS, UMR 6226, Rennes, Avenue du G n ral Leclerc, CS 50837, 35708 Rennes Cedex 7, France.
3 Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
4 Social Determinants of Health Research center, Ardabil University of Medical Sciences, Ardabil, Iran
5 Research Center for Environnemental D terminants of Heath (RCEDH), D partment of Biostatistics and Epidemiology, School of Public Health, Kermanshah University of Medical Sciences, Kermanshah, Iran
Abstract
The link between the concentration of biodegradable organic matter and the rate of phenol removal in anaerobic conditions was examined in this work. This study was undertaken using a laboratory scale anaerobic stabilization pond and five closed reactors at two retention times, 2 and 5 days. The initial concentration of phenol and soluble COD decreased in the anaerobic pond effluent and the reactors with increasing hydraulic retention time; 98.6 % phenol removal was observed in reactors after 50 days and in the presence of 1000 mg/L COD, while 98.8 % removal was obtained after 5 days in the anaerobic stabilization pond system in the presence of 500 mg/L COD. Two-way ANOVA test with Scheffe post-hoc confirmed that phenol removal was optimal for 10002000 mg/L biodegradable COD and 50 days retention time in the reactors and with 500 mg/L biodegradable COD and 5 days retention time in the anaerobic pond.
Keywords
anaerobic reactor; anaerobic stabilization pond; biodegradable organic matter; phenol removal