College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China.
College of Geography and Environmental Science, Zhejiang Normal University, Jinhua, 321004, China.
J Environ Manage. 2018 Sep 15;222:185-189. doi: 10.1016/j.jenvman.2018.05.061. Epub 2018 May 26.
In this study, high-efficient phenol-degrading bacterium Bacillus sp. SAS19 which was isolated from activated sludge by resuscitation-promoting factor (Rpf) addition, were immobilized on porous carbonaceous gels (CGs) for phenol degradation. The phenol-degrading capabilities of free and immobilized Bacillus sp. SAS19 were evaluated under various initial phenol concentrations. The obtained results showed that phenol could be removed effectively by both free and immobilized Bacillus sp. SAS19. Furthermore, for degradation of phenol at high concentrations, long-term utilization and recycling were more readily achieved for immobilized bacteria as compared to free bacteria. Immobilized bacteria exhibited significant increase in phenol-degrading capabilities in the third cycle of recycling and reuse, which demonstrated 87.2% and 100% of phenol (1600 mg/L) degradation efficiency at 12 and 24 h, respectively. The present study revealed that immobilized Bacillus sp. SAS19 can be potentially used for enhanced treatment of synthetic phenol-laden wastewater.
在这项研究中，通过添加促复苏因子（Rpf）从活性污泥中分离出的高效苯酚降解菌芽孢杆菌 SAS19 被固定在多孔碳质凝胶（CGs）上用于苯酚降解。在不同的初始苯酚浓度下，评估了游离和固定化芽孢杆菌 SAS19 的苯酚降解能力。结果表明，游离和固定化的芽孢杆菌 SAS19 均可有效去除苯酚。此外，对于高浓度苯酚的降解，与游离菌相比，固定化菌更易于长期利用和回收。在循环和再利用的第三周期中，固定化细菌的苯酚降解能力显著提高，分别在 12 和 24 h 时达到 87.2%和 100%的苯酚（1600 mg/L）降解效率。本研究表明，固定化芽孢杆菌 SAS19 可用于增强处理含合成苯酚的废水。
