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| Biodegradation of 2,6-ditert-butylphenol by immobilized microorganism strains | |
| 作者姓名： | ZHANG Ya-lei ZHANG Zhi-gang XU De-qiang QIANG Zhi-min LI Guang-ming ZHAO Jian-fu |
| 作者单位： | [1]Key Laboratory of Yangtze Water Environment of Ministry of Education, Tongji University, Shanghai 200092, China [2]School of Life Science, Fudan University, Shanghai 200433, China [3]Department of Civil, Architectural and Environmental Engineering, University of Missouri-Rolla, Rolla, MO 65409, USA [4]State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China |
| 基金项目： | 中国科学院资助项目;国家科技攻关项目 |
| 摘 要： | 2,6-Ditert-butylphenol （2,6-DTBP） is a major organic contaminant presenting in acrylic fiber manufacturing wastewaters. This compound is of high bio-resistance due to its complex structure which consists of one phenol group and two highly branched tert-butyl groups. This research attempted to improve the biodegradation efficiency of 2,6-DTBP through various strain immobilization methods. The stratified immobilization can settle oxygen transmission in the single microorganism immobilization, and can realize two-process reaction in the single device by choosing two symbiotic microorganisms. Two effective strains, named F-1-4 and F-3-4, which were screened out in our previous work, were used to degrade 2,6-DTBP after being immobilized in calcium alginate gel. Results indicate that the substrate removal efficiency of various immobilization methods follows the order： stratified 〉 single F-3-4 〉 mixed ≈single F-1-4. The immobilized biodegradation capacity was higher than the free one. After an incubation time of 12 d, 91% of 2,6-DTBP could be degraded by the stratified immobilization method, compared to 79% achieved by the mixed immobilization method with an initial 2,6-DTBP concentration of 100 mg/L. The stratified immobilization satisfies the oxygen demand nature of the aerobic F-3-4 and the facultative F-1-4, thus yielding the highest degradation efficiency. Both the outer layer strain F-3-4 and the inner layer strain F-1-4 can grow actively on the substrate of 2,6-DTBP, as illustrated by SEM images. This study shows that the highly bio-refractory compound, 2,6-DTBP, can be effectively degraded using appropriately inunobilized microorganism strains. |
| 关 键 词： | 生物降解 微生物 菌株 固定机制 合成工艺 |
| 文章编号： | 1001-0742（2006）02-0369-04 |
| 收稿时间： | 2005-06-27 |
| 修稿时间： | 2005-08-31 |
Biodegradation of 2,6-ditert-butylphenol by immobilized microorganism strains |
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| ZHANG Ya-lei,ZHANG Zhi-gang,XU De-qiang,QIANG Zhi-min,LI Guang-ming,ZHAO Jian-fu.Biodegradation of 2,6-ditert-butylphenol by immobilized microorganism strains[J].Journal of Environmental Sciences,2006,18(2):369-372. | |
| Authors: | ZHANG Ya-lei ZHANG Zhi-gang XU De-qiang QIANG Zhi-min LI Guang-ming and ZHAO Jian-fu |
| Institution: | 1. Key Laboratory of Yangtze Water Environment of Ministry of Education, Tongji University, Shanghai 200092, China 2. School of Life Science, Fudan University, Shanghai 200433, China 3. Department of Civil, Architectural and Environmental Engineering, University of Missouri-Rolla, Rolla, MO 65409, USA 4. State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China |
| Abstract: | 2,6-Ditert-butylphenol (2,6-DTBP) is a major organic contaminant presenting in acrylic fiber manufacturing wastewaters.This compound is of high bio-resistance due to its complex structure which consists of one phenol group and two highly branched tert-but |
| Keywords: | biodegradation 2 6-ditert-butylphenol immobilization microorganism strains |
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