高浓度4-氯酚在中空纤维聚砜膜固定化细菌反应器中的共代谢降解研究  

Cometabolic Transformation of High Concentrations of 4-Chlorophenol in an Immobilized Cell Hollow Fiber Membrane Bioreactor

作　　者：李轶[1,2] 雷洪犇[1] 

机构地区：[1]河海大学环境科学与工程学院,浅水湖泊综合治理与资源开发教育部重点实验室,南京210098 [2]南京大学污染控制与资源化研究国家重点实验室,南京210093

出　　处：《环境科学》2009年第10期3007-3010,共4页Environmental Science

基　　金：污染控制与资源化研究国家重点实验室开放基金项目(PCRRF08015)

摘　　要：悬浮生长的Pseudomonas putida菌可以苯酚为生长基质,通过该细菌的共代谢过程将4-氯酚降解.当苯酚和4-氯酚的浓度达到120 mg/L和600 mg/L时,由于基质对细菌的抑制作用,该共代谢过程难以进行,细菌不能生长.通过对细菌在中空纤维膜反应器中固定化,细菌可以降解高浓度的四氯苯酚,即使当苯酚和4-氯酚浓度为200 mg/L和1 000 mg/L时,利用此中空纤维膜固定化细菌反应器仍可在34 h内都能将其完全降解.与悬浮生长降解菌不同,由于基质在中空纤维膜中质量传递的受限,固定化后的细菌受到中空纤维膜的保护,从而得以生长并降解高浓度的基质.Pseudomonas putida grown suspendedly can cometabolize 4-chlorophenol（4-CP）in the presence of phenol（growth substrate）.However,cometabolization process cannot be maintained due to the high toxicity of phenol and 4-CP to cells when the initial concentrations of phenol and 4-CP were 120mg/L and 600mg/L,respectively.Cells can degrade phenol and 4-CP at high concentrations after immobilization in hollow fiber membrane bioreactors.Even when the initial concentrations of phenol and 4-CP were 200mg/L and 1000 mg/L,the substrates were completely biotransformed with in 34 hours.Different from free suspension cells,immobilized cells were protected by the hollow fiber membranes due to mass transfer limitation in the membranes.The cells can grow and degraded high concentration substrates.

关 键 词：生物降解 生物转化 间隙操作 苯酚 膜 

分 类 号：X172[环境科学与工程—环境科学]