Enhancement of aerobic biodegradation in an oxygen-limiting environment using a saponin-based microbubble suspension |
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| Authors: | Yong Ju Choi Young-Jin Kim Kyoungphile Nam |
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| Institution: | 1. Université de Lorraine, Faculté des sciences, bd des Aiguillettes, 54506 Vandoeuvre-lès-Nancy, France;2. CNRS, LIMOS UMR7137, BP70239, Faculté des sciences, 54506 Vandoeuvre-lès-Nancy, France;3. CNRS, G2R UMR7566, BP70239, Faculté des sciences, 54506 Vandoeuvre-lès-Nancy, France;4. INPL-INRA (ENSAIA), LSE UMR1120, BP 172, 54505 Vandoeuvre-lès-Nancy, France;1. Graduate School of Agricultural & Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku, Tokyo 113-8657, Japan;2. College of Bioresource Sciences, Nihon University, Kameino 1866, Fujisawa, Kanagawa 252-0880, Japan;1. Institut UTINAM, Université de Bourgogne Franche-Comté, 16 Route de Gray, 25000, Besançon, France;2. BRGM, 3 Avenue Claude Guillemin, 45060, Orléans, France;1. School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China;2. The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou, 510006, PR China |
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| Abstract: | This study investigated the ability of a saponin-based microbubble suspension to enhance aerobic biodegradation of phenanthrene by subsurface delivery. As the microbubble suspension flowed through a sand column pressure buildup and release was repeatedly observed, which delivered oxygen to the less permeable regions. Burkholderia cepacia RPH1, a phenanthrene-degrading bacterium, was mainly transported in a suspended form in the microbubble suspension. When three pore volumes of the microbubble suspension containing B. cepacia RPH1 was introduced into a column contaminated with phenanthrene (100 mg/kg), the oxygen content declined to 5% from an initial value of 20% within 5 days and correspondingly, 34.4% of initial phenanthrene was removed in 8 days. The addition of two further three pore volumes enhanced the biodegradation efficiency by a factor of 2.2. Our data suggest that a saponin-based microbubble suspension could be a potential carrier for enhancing the aerobic biodegradation under an oxygen-limiting environment. |
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