Open AccessBiodegradation performance of anaerobic sequencing batch biofilm reactor for oil with polychlorinated biphenyls
Author(s) -
Moradpour Heshmatollah,
Ali Fatehizadeh,
Mohammad Mehdi Amin,
Mahnaz Nikaeen,
Arash Shafiea,
Reza Molayi,
Sabouri Amin,
Mohammad Ghasemian,
Hossien Farokhzaddeh
Publication year - 2013
Publication title -
international journal of environmental health engineering
Language(s) - English
Resource type - Journals
ISSN - 2277-9183
DOI - 10.4103/2277-9183.110175
Subject(s) - biodegradation , effluent , bioreactor , pulp and paper industry , chemistry , wastewater , volume (thermodynamics) , sequencing batch reactor , biogas , batch reactor , chemical oxygen demand , waste management , environmental chemistry , environmental science , environmental engineering , organic chemistry , physics , quantum mechanics , engineering , catalysis
Aims: The biodegradability of oil containing polychlorinated biphenyls (PCBs) from electrical transformer by the anaerobic sequencing biofilm batch reactor (ASBBR) with was assessed.Materials and Methods: Two anaerobic sequencing batch biofilm reactor (ASBBR) containing polyurethane foam cubes as inert support was used. The reactors were operated for 310 days at 35 ± 2°C. The reactors with a total volume of 7 L, 5 L effective volume and 3.5 L for gas production, were operated in a cycle per day. The effect of operational parameters including organic loading rate, PCBs loading rate, co-substrate type, initial PCBs and COD concentration was evaluated.Results: The results point to admirable reactors stability and over 95% efficiency in PCBs removal, with effluent PCBs concentration of lower than 10 mg/L. However, degradation rates increased as the initial concentration of PCBs as increased. The average of COD removal efficiency by two ASBBR reactors was more than 92% that corresponding to > 9 μg/L of effluent COD. In over all operation, average of biogas production in R1 was 5.7 ± 2.2 L/d and maximum produced biogas was 8.02 L/d at 310 day. The kinetic studies revealed that second - order kinetic model described the COD removal by ASBBR reactors from synthetic wastewater better than two other kinetic model.Conclusion: Therefore, this investigation demonstrated that the ASBBR have good potential for biodegradation of oil containing PCBs, despite variation of influent PCBs and organic loading rate (OLR)