葡萄糖对芽孢杆菌降解水体中4, 4’-二溴联苯醚的促进作用

Effect of Glucose Accelerating Degradation of Aqueous BDE-15 by Bacillus

摘要: 为了探究4，4′二溴联苯醚（BDE-15）在水环境中的生物降解过程及其影响因素，在实验室内利用筛选得到的芽孢杆菌（Bacillus sp.）对BDE-15进行生物降解试验，并研究了外加碳源和高初始浓度BDE-15对微生物降解能力的影响。结果表明，在葡萄糖作为外加碳源条件下芽孢杆菌能降解水体中BDE-15，4d后菌株对BDE-15的降解率为28％，再次添加葡萄糖可提高降解率至55％。高质量浓度（50 mg·L^-1）BDE-15能抑制芽孢杆菌生长，并显著影响菌株对BDE-15的降解能力。

Abstract: To explore process of BDE-15 biodegradation in water body and its influencing factors, an indoor experiment was carried out using Bacillus sp. to biodegrade BDE-15 in water to study effects of extragenous carbon and initial BDE-15 concentration on the bio-degradation capacity of the bacteria. Results show that Bacillus could not utilize BDE-15 as the sole carbon source for growth. If glucose was added, Bacillus could grow rapidly and improved its ability to degradate BDE-15 in water and in 4 days, it could degrade 28% of the BDE-15 in the solution and even 55% when an additional dose of glucose was added. The high initial BDE-15 concentration (50 mg•L^-1) could inhibit the growth of Bacillus and also its ability to biodegradate BDE-15.