Fig 1.
A schematic overview of the full-scale offshore produced water treatment plant, red stars showing the sampling sites.
Table 1.
Summary of water quality, numbers of reads and OTUs in samples of the full-scale offshore produced water treatment plant.
Fig 2.
Pie charts showing the dominant distributions of the detected microbes at the level of phylum in the collected samples; histograms showing the dominant distributions of detected proteobateria-affiliated microbes at the level of class in the collected samples.
Fig 3.
Plots of relative abundances of OTUs associated with various dominant metabolic functions annotated by FAPROTAX software.
Fig 4.
Schematic diagram of the ecosystem involving dominant microbial distributions and potential organics conversion processes in the water phase (ABRW) and sludge phase (ABRS) of the anaerobic baffled reactor.
Fig 5.
Bacterial phylogenetic tree of the dominant OTUs (relative abundance ≥0.5%) in the three aerobic parallel reactors constructed by the neighbor-joining method.
Potential function groups inferred from the relevant information extracted from NCBI database. Histograms showing the relative abundances (%) of reads of each dominant OUT detected in the three samples.