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%.
出处
《化工环保》
CAS
CSCD
北大核心
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)
