School of Environmental Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China.
Int J Environ Res Public Health. 2022 May 1;19(9):5515. doi: 10.3390/ijerph19095515.
Polycyclic aromatic hydrocarbons (PAHs) are typical high-risk, persistent organic pollutants. Biological slurry reactors are widely used for enhanced bioremediation. In this experiment, a highly efficient phenanthrene-degrading bacteria group was obtained through screening and domestication, and the community was named MZJ_21. After the addition of MZJ_21 to the aerobic slurry bioreactor, with the optimum conditions of the temperature, stirring speed, and aeration rate of 30 °C, 120 rpm, and 1 L/min, respectively, the phenanthrene degradation ratio reached 95.41% within 48 h. The exploration of the degradation of phenanthrene by MZJ_21 indicated that most MZJ_21 communities adsorbed on the soil particle, mainly because MZI_21 could secrete extracellular polymers, which could stably adhere MZJ_21 on the solid phase. At the same time, the distribution ratio of phenanthrene in the solid phase is increased, so that the efficient phenanthrene degradation reaction takes place in the solid phase.
多环芳烃（PAHs）是典型的高风险、持久性有机污染物。生物泥浆反应器广泛用于增强生物修复。在本实验中，通过筛选和驯化获得了一种高效的菲降解细菌群，将其命名为 MZJ_21。将 MZJ_21 添加到好氧泥浆生物反应器中，在温度、搅拌速度和通气率分别为 30°C、120rpm 和 1L/min 的最佳条件下，48 小时内菲的降解率达到 95.41%。MZJ_21 对菲的降解探索表明，大多数 MZJ_21 群落吸附在土壤颗粒上，主要是因为 MZI_21 可以分泌胞外聚合物，从而使 MZJ_21 稳定地附着在固相上。同时，菲在固相中分配比增加，从而使有效的菲降解反应在固相中发生。
