Abstract
Based on the characteristic that the air can form a vortex around the carrier after passing through the suspended carrier, a new layered fan-like carrier and a wave multi-channel carrier were prepared by designing the spatial structure of the suspension carrier and combining 3D printing technology. Compared with commercially available multi-faceted hollow sphere carrier, clear water oxygenation experiment was carried out in a transparent organic glass reactor, and the aeration volumetric flow rate was 0.28, 0.42, 0.56, 0.70, and 0.84 VVM, respectively. The results show that the growth rate of dissolved oxygen, the saturation value of dissolved oxygen, and the oxygen mass transfer coefficient in the new type of carrier reactor are higher than those of commercially available multi-faceted hollow spheres and blank reactors at various aeration intensities. Under the condition of aeration volumetric flow rate at 0.56 VVM, the reactor can reach dissolved oxygen saturation at a faster rate of dissolved oxygen growth. Combined with the FLUENT numerical simulation and sewage treatment experiments, it is proved that changing the spatial structure of the carrier can accelerate the reoxygenation of the water body, increase the value of dissolved oxygen saturated in the water, and create ideal mass transfer conditions for the MBBR (moving bed biofilm reactor).
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At the point of finishing this manuscript, the authors would like to express sincere thanks to all those who have lent them hands in the course of their writing of this manuscript. At the same time, the authors would like to acknowledge other researchers for assisting in providing references and information during the conduct of this research and manuscript.
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YX and BZ is the designer of the experiment and the executive of the experimental research in this study, completing data analysis and writing the first draft of the manuscript. YW is involved in experimental design and analysis of experimental results. AW is the creator and the person in charge of the project, directing experimental design, data analysis, and thesis writing and revision. All authors read and approved the final manuscript.
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Wan, A., Zhao, B., Xie, Y. et al. Study on the effect of new type of suspended carrier on oxygen mass transfer characteristics. Environ Sci Pollut Res 28, 36911–36923 (2021). https://doi.org/10.1007/s11356-021-14371-x
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DOI: https://doi.org/10.1007/s11356-021-14371-x