Enhancement of aerobic biodegradation in an oxygen-limiting environment using a saponin-based microbubble suspension

被引:28
作者
Choi, Yong Ju [1 ]
Kim, Young-Jin [1 ]
Nam, Kyoungphile [1 ]
机构
[1] Seoul Natl Univ, Dept Civil & Environm Engn, Seoul, South Korea
关键词
Aerobic biodegradation; Bioaugmentation; Microbubble suspension; Oxygen-deficient; Saponin; SURFACTANT FOAM; NATURAL ATTENUATION; REMEDIATION; HYDROCARBONS; CONTAMINANTS; TECHNOLOGY; TRANSPORT; BACTERIA;
D O I
10.1016/j.envpol.2009.04.014
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
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. (C) 2009 Elsevier Ltd. All rights reserved
引用
收藏
页码:2197 / 2202
页数:6
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