摘要
研究了升流式厌氧污泥床反应器（ＵＡＳＢ）在中温条件下处理含五氯酚（ＰＣＰ）模拟废水时工艺特点及ＰＣＰ降解机理。结果表明：①在以处理啤酒废水的厌氧颗粒污泥为接种物（ＶＳＳ接种量约１５ｇ／Ｌ），运行温度为（３５±１）℃，水力停留时间为２０～２４ｈ，进水ＣＯＤ浓度为２５００～２８００ｍｇ／Ｌ；进水ＰＣＰ浓度由１０ｍｇ／Ｌ上升至８０ｍｇ／Ｌ条件下，１２０ｄ左右完成启动，ＰＣＰ和ＣＯＤ去除率分别为９４％及８６％以上。②高效液相色谱仪检测结果分析表明，ＰＣＰ厌氧降解的途径是首先经间位脱氯生成四氯酚和２，４，６－三氯酚，再经邻位和对位脱氯生成２，４－二氯酚和邻氯苯酚，最后矿化为ＣＨ４和ＣＯ２。
In this study,the characteristics of anaerobic granules degrading pentachlorophenol(PCP) were investigated in a pilot scale upflow anaerobic sludge blanket (UASB) reactor at (35±1)℃.Experimental results demonstrate:①When brewery waste degrading granules obtained from a full scale UASB reactor treating brewery wastewater were used as seed,the start up process was completed within 120 d,with influent COD 2 500～2 800 mg/L,a hydraulic retention time 20～24 h and influent PCP 1.0～8.0 mg/L.The COD and PCP removal rates were 86% and 94% respectively.②The determinations of cholrophenols in effluent and reactor suggest that the PCP degrading granules dechlorinated PCP primarily at the meta position,then at the ortho position and the para position,and a part of intermediates were finally to CH 4 and CO 2.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
1999年第1期23-26,共4页
Research of Environmental Sciences
基金
国家自然科学基金
关键词
UASB反应器
五氯酚
厌氧污泥床
废水处理
升流式
Upflow anaerobic sludge blanket reactor
PCP wastewater
Granular sludge
Degration mechanism
Wastewater treatment
