Lu Lichao, Wang Guangchun, Yeung Marvin, Xi Jinying, Hu Hong-Ying
Environmental Simulation and Pollution Control State Key Joint Laboratory, School of Environment, Tsinghua University, Beijing, China.
Central Research Institute of Building and Construction, MCC Group, Co, Ltd., Beijing, China.
AMB Express. 2018 Oct 3;8(1):160. doi: 10.1186/s13568-018-0687-z.
The effects of inlet VOCs (Volatile Organic Compounds) shifts on microbial community structure in a biofiltration system were investigated. A lab-scale biofilter was set up to treat eight VOCs sequentially. Short declines in removal efficiency appeared after VOCs shifts and then later recovered. The number of OTUs in the biofilter declined from 690 to 312 over time. At the phylum level, Actinobacteria and Proteobacteria remained dominant throughout the operation for all VOCs, with their combined abundance ranging from 60 to 90%. The abundances of Planctomycetes and Thermi increased significantly to 20% and 5%, respectively, with the intake of non-aromatic hydrocarbons. At the genus level, Rhodococcus was present in the highest abundance (≥ 10%) throughout the experiment, indicating its wide degradability. Some potential degraders were also found; namely, Thauera and Pseudomonas, which increased in abundance to 19% and 12% during treatment with ethyl acetate and toluene, respectively. Moreover, the microbial metabolic activity declined gradually with time, and the metabolic profile of the toluene-treating community differed significantly from those of other communities.
研究了进气挥发性有机化合物（VOCs）变化对生物过滤系统中微生物群落结构的影响。搭建了一个实验室规模的生物滤池，用于依次处理8种VOCs。VOCs变化后，去除效率出现短暂下降，随后恢复。随着时间的推移，生物滤池中的操作分类单元（OTU）数量从690减少到312。在门水平上，放线菌门和变形菌门在所有VOCs的整个运行过程中均保持优势，其总丰度范围为60%至90%。随着非芳烃的引入，浮霉菌门和栖热菌门的丰度分别显著增加至20%和5%。在属水平上，红球菌在整个实验过程中丰度最高（≥10%），表明其具有广泛的可降解性。还发现了一些潜在的降解菌，即陶厄氏菌属和假单胞菌属，它们在分别用乙酸乙酯和甲苯处理期间，丰度分别增加到19%和12%。此外，微生物代谢活性随时间逐渐下降，处理甲苯的群落代谢谱与其他群落显著不同。
