以混合单氯酚驯化厌氧颗粒污泥降解2,4-DCP的研究  

Study on Biodegradation of 2,4-DCP by Anaerobic Sludge Acclimated by Mixed Mono-Chlorphenols

作　　者：张文[1] 陈玲[1] 计军平[1] 夏四清[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《环境科学》2007年第6期1252-1257,共6页Environmental Science

基　　金：国家高技术研究发展计划(863)项目(20025AA601270)

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 2 4-二氯酚 脱氯 

分 类 号：X703.1[环境科学与工程—环境工程]