鼠李糖脂、Fe^(3+)及Mg^(2+)对蜡质芽孢杆菌DL-1降解邻二氯苯的复合影响  

Composite effects of rhamnolipid,Fe^(3+) and Mg^(2+) on degradation of o-dichlorobenzene by Bacillus cereus strain DL-1

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作  者:孙祝秋 杨百忍[2] 丁成[2] 

机构地区:[1]江苏大学环境与安全工程学院,江苏镇江212013 [2]盐城工学院环境科学与工程学院,江苏盐城224051

出  处:《化工环保》2017年第1期88-93,共6页Environmental Protection of Chemical Industry

基  金:江苏省环保科研项目(2015007;2014018)

摘  要:以蜡质芽孢杆菌DL-1降解邻二氯苯,研究不同浓度的鼠李糖脂、Fe^(3+)、Mg^(2+)对邻二氯苯生物降解效果的影响。通过响应面优化法获得最适加入量,并考察添加鼠李糖脂、Fe^(3+)、Mg^(2+)的生物滴滤塔中邻二氯苯废气的处理效果。实验结果表明:鼠李糖脂、Fe^(3+)、Mg^(2+)的最适加入量分别为120,4.0,2.0 mg/L;在最适加入量下培养48 h后,邻二氯苯降解菌DL-1能够保持菌体完整,培养72 h后邻二氯苯去除率可达98.3%;在鼠李糖脂、Fe^(3+)、Mg^(2+)加入量为最适加入量、空床停留时间为60 s、进气中邻二氯苯质量浓度为1 000 mg/m3时,生物滴滤塔对邻二氯苯的去除率达到90.0%。o-Dichlorobenzeneas was degraded by a strain of Bacillus cereus DL-1. The effects of rhamnolipid, Fe3+ and Mg2+ with different concentration on the bio-degradation were studied. Their optimum conditions were obtained by using response surface optimization method, and the treatment effect of o-dichlorobenzene-containing waste gas in a biotrickling filter with rhamnolipid, Fe3+ and Mg2+ addition were investigated. The experimental results show that: The optimum dosage ofrhamnolipid, Fe3+, and Mg2+ is 120 , 4.0, 2.0 mg/L respectively; Under the optimum dosages, the Bacillus cereus DL-1 strain can keep intact after cultured for 48 h, and the o-dichlorobenzene removal rate is 98.3% after cultured for 72 h; When rhamnolipid, Fe3+, and Mg2+ are added with the optimum dosage, the empty bed residence time is 60 s and the mass concentration of o-dichlorobenzene in the biotrickling filter inlet is 1 000 mg/m3, the o-dichlorobenzene removal rate is 90.0%.

关 键 词:鼠李糖脂 铁离子 镁离子 邻二氯苯 蜡质芽孢杆菌 响应面法 生物滴滤塔 

分 类 号:X511[环境科学与工程—环境工程]

 

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