作　　者： ; ;

机构地区： 华南理工大学轻工与食品学院制浆造纸工程国家重点实验室

出　　处： 《造纸科学与技术》 2013年第6期86-90,共5页

摘　　要： 五氯酚(PCP)由于本身的芳环结构和氯代原子的存在而具有很强的毒性和抗降解能力,其废水处理方式一直备受关注。本文主要通过在反应器外曝气,采用间歇式微氧升流式污泥床(MUSB)反应器,在微好氧条件下成功培养出了具有降解PCP能力的微好氧颗粒污泥,并利用同时好氧-厌氧的微好氧活性污泥工艺处理PCP废水。通过GC-MS对PCP降解中间产物的分析表明PCP的降解发生在厌氧区,首先经邻位脱氯生成3,4,5-TCP,然后进一步经间位脱氯生成3,4-DCP;而DCP在好氧区最终被氧化为CO2、H2O和Cl-。与厌氧条件下相比,在微好氧条件下可以避免有效中间产物的积累,有利于整体反应的进行。 Pentachlorophenol （PCP） is a widespread environmental concern due to its strong toxicity and anti-degradation capability because of its aromatic and high ehloro-substituted structure. Sequence anaerobic-aerobic process with Microaerophilic Upflow Sludge Bed （MUSB） Reactor, which is successfully cultivation of microaerobie granules, was used to degrade the PCP. Analysis of degraded intermediate products of PCP by GC-MS showed that PCP firstly dechlorinated at the ortho-position and 3,4,5-TCP was formed, then deehlorinated at the meta-position and 3,4-DCP was formed in anaerobic zone. 3,4-DCP was finally mineralized to CO2 , H20 and Cl-in aerobic zone. Comparison with the accumulation of lower chlorophenols by anaerobic granules in literature, PCP could be mineralized completely with microaerobic granules, and no lower ehlorophenols were accumulated.

关 键 词： 微氧污泥 五氯酚 降解途径

领　　域： [环境科学与工程]