The plasticity of indigenous microbial community in a full-scale heavy oil produced water treatment plant
The plasticity of indigenous microbial community in a full-scale heavy oil produced water treatment plant
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大型重油采出水处理厂本土微生物群落的可塑性
DOI：
10.1016/j.jhazmat.2018.06.049
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发表时间：
2018
影响因子：
13.6
通讯作者：
Xu Ping
中科院分区：
文献类型：
--
作者：
Wang Xiaoyu;Jiang Limin;Gai Zhonghui;Tao Fei;Tang Hongzhi;Xu Ping
原生微生物群落具有良好的适应性、降解能力和固有的可塑性，是生物修复的主要和有前途的表演者。处理稠油采出水（HOPW）是一个挑战，因为它含有高顽固性和非均质性的化学物质。利用本地微生物群落，建成了一个容量为10,000 m3/d的全规模HOPW处理厂。经处理后出水达到设计标准。采用Illumina MiSeq 16S rRNA基因测序分析各处理阶段的微生物群落结构。微生物群落的组成随着环境条件的变化而发生很大的变化，特别是在溶解氧这一唯一人为调节的参数下。在厌氧阶段，该群落将顽固的化学需氧量转化为生物需氧量（BOD），对提高HOPW的生物降解性起着重要作用。在好氧阶段，群落以BOD矿化为主。这些结果表明，在不同处理阶段，本地微生物群落的结构不同，以完成相应的功能。基于这些发现，我们提出利用微生物群落的可塑性进行生物修复是可行的，特别是处理含不同成分的废水。
Indigenous microbial communities are main and promising performers for bioremediation due to their excellent adaptability, degradation capability, and inherent plasticity. Treating heavy oil-produced water (HOPW) is a challenge owing to the high recalcitrance and heterogeneity of chemicals it contains. A full-scale HOPW treatment plant was built at a capacity of 10,000 m3/d with the indigenous microbial community. After the treatment, the outlet water reached the design standard. The microbial community structures in all treatment stages were analyzed by using Illumina MiSeq 16S rRNA gene sequencing. The composition of microbial community changed greatly with the changes in environmental conditions, especially with the only artificially regulated parameter of dissolved oxygen. In the anaerobic stage, the community converted the recalcitrant chemical oxygen demand to biological oxygen demand (BOD), and played a major role in enhancing the biodegradability of HOPW. During the aerobic stage, the community mainly mineralized BOD. These results suggest that the structures of indigenous microbial community differed in different treatment stages to accomplish the corresponding functions. Based on these findings, it is proposed that exploiting the plasticity of microbial communities for bioremediation is feasible, especially treating wastewater with varied components.