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Open AccessArticle

Study on Aeration Optimization and Sewage Treatment Efficiency of a Novel Micro-Pressure Swirl Reactor (MPSR)

by Shengshu Ai 1,2, Shuangshi Dong 1,*, Zebing Nie 2,3, Suiyi Zhu 2,3, Qingkai Ren 2,3 and Dejun Bian 2,3,*
1
Key Laboratory of Groundwater Resources and Environment (Ministry of education), Jilin University, Changchun 130021, China
2
Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun 130012, China
3
Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China
*
Authors to whom correspondence should be addressed.
Water 2020, 12(3), 890; https://doi.org/10.3390/w12030890 (registering DOI)
Received: 9 February 2020 / Revised: 13 March 2020 / Accepted: 17 March 2020 / Published: 22 March 2020
(This article belongs to the Special Issue Advances in the Technologies for Water and Wastewater Treatment)
This study developed a new type of micro-pressure swirl reactor (MPSR) for treating rural domestic sewage with variable water volume in northern China. The transformation of a traditional aeration tank to MPSR was mainly divided into three steps. Firstly, the aeration device was installed on one side of the aeration tank. Secondly, most of the top cover plate was sealed. Finally, the liquid level-lifting zone was set to achieve micro-pressure. The study measured the flow velocity and dissolved oxygen (DO) distribution in the main reaction zone of MPSR, studied the effects of MPSR sewage treatment in continuous operation mode and sequential batch operation mode, and analyzed the main microbial species. The experimental results showed that a stable circular circle flow and a spatial DO gradient in MPSR were formed when the aeration rate of MPSR was 0.2 m3/h. Through the MPSR sewage treatment experiment in two operation modes, it could meet the current requirements of rural environmental pollution controlled in China. Analysis of the types of microorganisms showed that microorganisms with different functions gathered in different zones of the MPSR due to the different dissolved oxygen environment and water flow environment, which further improved the ability of MPSR to simultaneously remove nitrogen and phosphorus. View Full-Text
Keywords: micro-pressure swirl reactor (MPSR); biological aeration tank; dissolved oxygen distribution; velocity distribution; rural domestic sewage micro-pressure swirl reactor (MPSR); biological aeration tank; dissolved oxygen distribution; velocity distribution; rural domestic sewage
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Ai, S.; Dong, S.; Nie, Z.; Zhu, S.; Ren, Q.; Bian, D. Study on Aeration Optimization and Sewage Treatment Efficiency of a Novel Micro-Pressure Swirl Reactor (MPSR). Water 2020, 12, 890.

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