Institute of Marine Biology, Ocean College, Zhejiang University, Zhoushan 316021, Zhejiang, China.
Xinjiang Keli New Technology Development Co., Ltd., Karamay 834000, Xinjiang, China.
Bioresour Technol. 2021 Sep;335:125267. doi: 10.1016/j.biortech.2021.125267. Epub 2021 May 11.
The multistage bio-contact oxidation reactor (BCOR) is a widely used biological strategy to treat wastewater, however, little is known about the performance and microbial community information of BCOR during the treatment of low-COD and high-salinity oilfield produced water. In this study, the performance of a multistage BCOR in treating produced water was investigated. The result suggested the BCOR could efficiently remove COD, BOD, NH-N, and oil pollutants. Besides, high-throughput sequencing analysis revealed that oil content was the main variable in shaping the community structure. The highest total relative abundance of potential pollutants degraders in first BCOR stage suggested significant role of this stage in pollutants removal. In addition, the correlation analysis disclosed the key functional genera during the degradation process, including Rhodobacter, Citreibacter, and Roseovarius. Moreover, network analysis revealed that the microbial taxa within same module had strong ecological linkages and specific functions.
多段式生物接触氧化反应器（BCOR）是一种广泛应用于处理废水的生物策略，但对于其在处理低 COD 和高盐油田采出水时的性能和微生物群落信息了解甚少。本研究中，考察了多段式 BCOR 处理采出水的性能。结果表明，BCOR 可有效去除 COD、BOD、NH-N 和油类污染物。此外，高通量测序分析表明，含油量是影响群落结构的主要因素。第一级 BCOR 中潜在污染物降解菌的相对丰度最高，表明该级在污染物去除中发挥了重要作用。此外，相关性分析揭示了降解过程中的关键功能属，包括红杆菌属、柠檬酸杆菌属和玫瑰杆菌属。此外，网络分析表明，同一模块内的微生物类群具有较强的生态联系和特定功能。
