Cyclohexane Removal in a Dual-Tube Membrane Bioreactor |
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Authors: | Michael Roberts Ellen England Charles Bleckmann |
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Institution: | 1. United States Air Force School of Aerospace Medicine , Brooks Air Force Base , Texas , USA;2. Department of Systems and Engineering Management , Air Force Institute of Technology , Wright-Patterson Air Force Base , Ohio , USA |
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Abstract: | A dual-tube dense-phase silicone rubber membrane bioreactor was investigated for control of cyclohexane-contaminated air as part of a jet propulsion (JP-8) fuel remediation investigation strategy. The reactor was seeded with a mixed bacterial consortium isolated from the water/fuel interface of a JP-8 jet fuel sample and activated sludge, capable of aromatic and cyclic compound biodegradation. Cyclohexane removal ranged from 1.1 to 28.6 mg L?1, with removal percentages ranging from 4.6% to 37.6%. Removal in the bioreactor ranged from 29.4 to 596.6 mg min?1 m?2 and measured elimination capacities ranged from 46.7 to 947.9 g m?3 h?1. Removal rates and elimination capacity increased with increasing biofilm growth and with increasing loading rates of cyclohexane. Loading rates ranged from 395.9 to 2189.5 mg min?1 m?2. Results of this study showed effective removal of cyclohexane using the membrane bioreactor, suggesting that this technology may have applicability for treating vapors contaminated with cyclic hydrocarbons. |
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Keywords: | air biofilter biofiltration bioreactor cyclohexane HFMM hollow fiber membrane module membrane model silicone |
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