Phenol degradation by Bacillus cereus: Pathway and kinetic modeling
Phenol degradation by Bacillus cereus: Pathway and kinetic modeling
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DOI：
10.1016/j.biortech.2010.02.018
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发表时间：
2010-07-01
影响因子：
11.4
通讯作者：
Ghoshal, Aloke K.
中科院分区：
文献类型：
--
作者：
Banerjee, Aditi;Ghoshal, Aloke K.
纯培养物蜡状芽孢杆菌 MTCC 9817 菌株 AKG1 和蜡状芽孢杆菌 MTCC 9818 菌株 AKG2 对苯酚的微生物降解以批次模式研究，苯酚初始浓度范围为 100-2000 mg/L，间隔为 100 mg/L。在苯酚初始浓度为 100、500、 1000、1500 和 2000 毫克/升。该细菌能够降解浓度高达2000mg/L的苯酚。菌株AKG1在约800mg/L的苯酚初始浓度和菌株AKG2约200mg/L的初始苯酚浓度下获得最大降解率。两种菌株均通过元裂解途径降解苯酚，形成 2-羟基粘康酸半醛 (2-HMSA) 作为中间产物。苯酚生物降解的建模表明 Haldane 抑制模型可以很好地预测两种菌株的实验数据。 (C) 2010 Elsevier Ltd. 保留所有权利。
The microbial degradation of phenol by pure cultures Bacillus cereus MTCC 9817 strain AKG1 and B. cereus MTCC 9818 strain AKG2 is studied in batch mode for several initial concentrations of phenol in the range of 100-2000 mg/L with an interval of 100 mg/L Degradation pathways are investigated at initial phenol concentrations of 100, 500, 1000, 1500, and 2000 mg/L. The bacteria are able to degrade phenol of concentration as high as 2000 mg/L The maximum degradation rate is obtained at an initial phenol concentration of about 800 mg/L for the strain AKG1 and about 200 mg/L for the strain AKG2. Both the strains degrade phenol via meta-cleavage pathway through formation of 2-hydroxymuconic semialdehyde (2-HMSA) as an intermediate product. Modeling of the biodegradation of phenol indicates that the Haldane inhibitory model predicts the experimental data fairly well for both the strains. (C) 2010 Elsevier Ltd. All rights reserved.