五氯酚在污染沉积物泥浆固液两相中厌氧生物降解

Anaerobic biodegradation of pentachlorophenol (PCP) in solid-liquid phase of contaminated sediment slurry

研究了污染沉积物泥浆液、固两相五氯酚(PCP)厌氧生物降解.结果表明,投加10 g·kg-1厌氧颗粒污泥,经31d处理泥浆液、固两相PCP降解率达98 .9% ,平均降解速率达到8 0mg·kg-1·d-1,对照处理平均降解速率仅为4. 4mg·kg-1·d-1,颗粒污泥生物强化作用明显.作为泥浆修复过程的调控因子,有机溶剂、共基质和表面活性剂对PCP降解效应不同,投加乙醇,可提高PCP解吸和降解速率,4d内两相PCP降解速率达到5 4 . 3mg·kg-1·d-1;而投加共基质和非离子表面活性剂乙二醇 丁醚后,液、固两相PCP降解均出现迟滞,两者均不同程度地抑制PCP降解.

The study showed that after inoculating 10 g·kg~ -1 anaerobic dechlorinated granular sludge (ADGS) for 31 days,the biodegradation rate of pentachlorophenol (PCP) in solid-liquid phase of contaminated sediment slurry was up to 98.9%,with an average of 8.0 mg·kg~ -1·d~ -1,while that of the control was only 4.4 mg·kg~ -1·d~ -1.As the regulation factors in slurry remediation,organic solvent,co-substrate and surfactant had different effects on PCP degradation.The addition of ethanol could enhance the desorption and degradation of PCP,the degradation rate being up to 54.3 mg·kg~ -1·d~ -1 within 4 days,while the addition of co-substrate and non-ionic surfactant EGME (ethylene glycol monobutyl- ether) inhibited the PCP degradation in solid- liquid phase of slurry.