| 4-氯酚存在对生物强化系统降解2,4-二氯酚的影响研究 |
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| 引用本文： | 全向春,施汉昌,王建龙,钱易.4-氯酚存在对生物强化系统降解2,4-二氯酚的影响研究[J].环境科学学报,2003,23(1):69-73. |
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| 作者姓名： | 全向春 施汉昌 王建龙 钱易 |
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| 作者单位： | 清华大学环境科学与工程系,环境模拟与污染控制国家重点联合实验室,北京,100084 |
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| 基金项目： | 国家自然基金资助项目 (2 96 370 10 ) |
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| 摘 要： | 采用生物强化技术降解废水中的难降解有机物 2 ,4 二氯酚 (简称 2 ,4 DCP) ,研究了不同浓度的 4 氯酚 (简称 4 MCP)存在对 2 ,4 DCP降解的影响 ,并通过半连续流实验研究了 4 MCP长期存在下 ,强化系统中 2 ,4 DCP和 4 MCP降解速率的变化趋势 .结果表明 ,第 1次半连续流实验中 ,4 MCP浓度为 5、10、2 0及 30mg L时 ,都会对强化系统中 2 ,4 DCP的降解速率产生一定的抑制作用 ,而且抑制作用随着 4 MCP浓度的增加而增强 .随着半连续流实验次数的增加 ,4 MCP对 2 ,4 DCP降解的抑制作用减弱甚至消失 ,共基质时 2 ,4 DCP的降解速率反而比其单基质半连续流运行时快 .4 MCP与 2 ,4 DCP共基质存在时 ,2 ,4 DCP优先被微生物利用 ,此后 4 MCP才被降解 ,表现出两阶段降解的现象 .
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| 关 键 词： | 降解速率 半连续流 固有菌 高效菌 4-氯酚 2 4-二氯酚 |
| 文章编号： | 0253-2468(2003)-01-0069-05 |
| 收稿时间： | 2002/1/18 0:00:00 |
| 修稿时间： | 2002年1月18日 |
Effects of the presence of 4-chlorophenol in the augmented system on the biodegradation of 2,4-dichlorophenol |
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| QUAN Xiangchun,SHI Hanchang,WANG Jianlong and QIAN Yi.Effects of the presence of 4-chlorophenol in the augmented system on the biodegradation of 2,4-dichlorophenol[J].Acta Scientiae Circumstantiae,2003,23(1):69-73. |
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| Authors: | QUAN Xiangchun SHI Hanchang WANG Jianlong and QIAN Yi |
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| Affiliation: | State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084,State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084,State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084 and State Key Joint Laboratory of Environment Simulation and Pollution Control, Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084 |
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| Abstract: | In a bioaugmented system with special culture supplemented for the removal of 2,4-Dichlorophenol (2,4-DCP), effects of 4-chlorophenol (4-MCP) presences at various concentrations in the system on the biodegradation of 2,4-DCP were studied. In addition, the changes of the removal rate of 2,4-DCP and 4-MCP in the mixture were investigated under fed-batch test. Results showed that the presence of 4-MCP at the concentration of 5*!mg/L, 10*!mg/L, 20*!mg/L and 30*!mg/L inhibited the biodegradation rate of 2,4-DCP and the inhibition increased with the increase of 2,4-DCP concentrations in the first run of fed-batch test. Whereas, in the second and third runs of the test, inhibition of 4-MCP to the biodegradation of 2,4-DCP decreased and even disappeared for the adaptation of the microorganisms in the bioaugmented system, and 2,4-DCP in the mixture with 4-MCP was degraded faster than the control one. 2,4-DCP was preferably utilized by the microbial in the bioaugmented system and 4-MCP was degraded thereafter, thus bi-phase biodegradation was observed. |
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| Keywords: | biodegradation rate fed-batch test indigenous culture special culture 4-chlorophenol 2 4-dichlorophenol |
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