| 以混合单氯酚驯化厌氧颗粒污泥降解2,4-DCP的研究 |
| 摘要点击 1584 全文点击 1145 投稿时间：2006-07-06 修订日期：2006-09-27 |
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| 中文关键词 氯酚 厌氧降解 2,4-二氯酚 脱氯 |
| 英文关键词 chlorphenol anaerobic degradation 2,4-DCP dechlorination |
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| 中文摘要 |
| 利用邻氯酚 (2-CP)和对氯酚 (4-MCP)的模拟废水驯化厌氧颗粒污泥并考察驯化的污泥对2,4-二氯酚 (2,4-DCP)的降解性.通过摇瓶试验和运行连续流反应器研究了将2种单氯酚驯化过的污泥混合后对混合单氯酚以及2,4-DCP的降解特性，并比较了驯化与未驯化的污泥降解2,4-DCP过程的差异.驯化与未驯化的污泥分别在50 h和180 h左右将2,4-DCP降解完全，表明混合单氯酚驯化的厌氧颗粒污泥降解2,4-DCP 比未驯化的厌氧颗粒污泥快.虽然2种污泥降解过程都出现了4-MCP积累现象，但驯化的污泥可以逐渐降解4-MCP，未驯化的污泥则无法降解.因此，混合单氯酚驯化的污泥可以强化邻、对位脱氯功能，并且提高污泥对2,4-DCP的降解性.连续流厌氧颗粒污泥-悬浮载体反应器的运行结果表明，接种混合单氯酚驯化的厌氧污泥能够同时降解2种单氯酚，可缩短启动时间，并提高了降解二氯酚效率.2-CP的去除率一直维持在80%左右，4-MCP随着进水浓度变化去除率在30%～80%波动. |
| 英文摘要 |
| Purpose of this study was to determine the treatability of 2,4-dichlorophenol (2,4-DCP) by anaerobic granular sludge which was acclimated by mixed mono-chlorphenols (2-CP,4-MCP). The characteristic of degradation of 2,4-DCP by anaerobic sludge acclimated by mixed mono-chlorphenols was investigated through shake flask study and performance of continuous flow anaerobic bioreactors. The difference of degradation of 2,4-DCP by acclimated and unacclimated sludge was also compared. 2,4-DCP was degraded at 50 h and 180 h respectively for acclimated and unacclimated sludge, which testified that acclimated sludge could more effectively degrade 2,4-DCP. Although the intermediate product 4-MCP was present in both reaction system, 4-MCP could be degraded completely after 400 h in the acclimated sludge but accumulated in the unacclimated sludge. Therefore, acclimation by the mixed mono-chlorphenols (2-CP, 4-MCP) could enhance the ability of para- and meta-dechlorination for anaerobic sludge and increase the treatability of 2,4-DCP. The results of continuous anaerobic sludge-suspended carrier bioreactor (ASSCB) indicate that inoculation of the acclimated sludge by mixed mono-chlorphenols can degrade two mono-chlorphenols simultaneously, shorten the setup period, and increase the efficiency of degrading 2,4-DCP. 2-CP was easily degraded with removal rate of over 80%. While the removal rate of 4-MCP was fluctuating within 30%～80% with changes of its influent concentration. |
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