作　　者： ; ; ; ;

机构地区： 同济大学环境科学与工程学院污染控制与资源化研究国家重点实验室

出　　处： 《环境科学》 2007年第6期1252-1257,共6页

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. 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-chIorphenols （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.

关 键 词： 氯酚 厌氧降解 二氯酚 脱氯

领　　域： [环境科学与工程]