Journal of Environmental Health Science Engineering | |
Biodegradation of naphthalene using Pseudomonas aeruginosa by up flow anoxic–aerobic continuous flow combined bioreactor | |
Mehry Esvand1  Maryam Habibi1  Behrooz Karimi2  | |
[1] Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran;Department of Environmental Health Engineering, School of Health, Tehran University of Medical Sciences, Tehran, Iran | |
关键词: Pseudomonas aeruginosa; Naphthalene; Biodegradation; Anoxic–aerobic continuous flow combined bioreactor; | |
Others : 1161179 DOI : 10.1186/s40201-015-0175-1 |
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received in 2014-10-25, accepted in 2015-03-03, 发布年份 2015 | |
【 摘 要 】
Background
Naphthalene is a poly aromatic hydrocarbon (PAH) present in many sediment-water systems. The aim of this study was to evaluate the applicability of an anoxic/aerobic system for the biological treatment of water polluted by naphthalene by Pseudomonas aeruginosa PTCC 1707 to utilize naphthalene. The naphthalene elimination from wastewater was determined in anoxic–aerobic continuous flow combined bioreactor under continuously oxic and anoxic conditions. Experiments were conducted in continues mode, and naphthalene was administered in consecutive spike doses. Then Pseudomonas aeruginosa bacteria suspension with a specific turbidity (0.5-10 NTU) was prepared from growing bacteria on R2A medium and injected to reactor.
Findings
At naphthalene concentration = 0.5-20 mg/L, 33–65.5% naphthalene removal efficiencies were observed. Mean COD removal efficiency in solid retention times of 2, 4, 6, and 8 days was 82.7, 92.45, 95.97 and 96.1%, respectively. Naphthalene removal efficiency by bacterium pseudomonas at pH 8 was 96% and at pH 4, 5.5, 7 and 9.5, 68, 80, 90 and 85%, respectively. As the initial concentration of naphthalene increased from 0.5 to 20 mg/L, the remaining concentration of naphthalene decreased from 33.4% to 65.5% after 3 days.
Conclusion
Based on experimental results, it was determined that this process can effectively reduce naphthalene under optimal conditions and this method can be used for the removal of similar compounds.
【 授权许可】
2015 Karimi et al.; licensee BioMed Central.
【 预 览 】
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