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Partial Nitrification and Enhanced Biological Phosphorus Removal in a Sequencing Batch Reactor Treating High-Strength Wastewater

Author

Listed:
  • Xiaojun Feng

    (Xi’an Modern Chemistry Research Institute, Xi’an 710065, China)

  • Yishi Qian

    (Xi’an Modern Chemistry Research Institute, Xi’an 710065, China
    Department of Environmental Science and Engineering, School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China)

  • Peng Xi

    (Xi’an Modern Chemistry Research Institute, Xi’an 710065, China)

  • Rui Cao

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Lu Qin

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Shengwei Zhang

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Guodong Chai

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Mengbo Huang

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Kailong Li

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Yi Xiao

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Lin Xie

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Yuxin Song

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China)

  • Dongqi Wang

    (Department of Municipal and Environmental Engineering, Xi’an University of Technology, Xi’an 710048, China
    State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
    Shaanxi Key Laboratory of Water Resources and Environment, Xi’an University of Technology, Xi’an 710048, China)

Abstract

Complex and high levels of various pollutants in high-strength wastewaters hinder efficient and stable biological nutrient removal. In this study, the changes in pollutant removal performance and microbial community structure in a laboratory-scale anaerobic/aerobic sequencing batch reactor (SBR) treating simulated pre-fermented high-strength wastewater were investigated under different influent loading conditions. The results showed that when the influent chemical oxygen demand (COD), total nitrogen (TN), and orthophosphate (PO 4 3− -P) concentrations in the SBR increased to 983, 56, and 20 mg/L, respectively, the COD removal efficiency was maintained above 85%, the TN removal efficiency was 64.5%, and the PO 4 3− -P removal efficiency increased from 78.3% to 97.5%. Partial nitrification with simultaneous accumulation of ammonia (NH 4 + -N) and nitrite (NO 2 − -N) was observed, which may be related to the effect of high influent load on ammonia- and nitrite-oxidising bacteria. The biological phosphorus removal activity was higher when propionate was used as the carbon source instead of acetate. The relative abundance of glycogen accumulating organisms (GAOs) increased significantly with the increase in organic load, while Tetrasphaera was the consistently dominant polyphosphate accumulating organism (PAO) in the reactor. Under high organic loading conditions, there was no significant PAO–GAO competition in the reactor, thus the phosphorus removal performance was not affected.

Suggested Citation

  • Xiaojun Feng & Yishi Qian & Peng Xi & Rui Cao & Lu Qin & Shengwei Zhang & Guodong Chai & Mengbo Huang & Kailong Li & Yi Xiao & Lin Xie & Yuxin Song & Dongqi Wang, 2022. "Partial Nitrification and Enhanced Biological Phosphorus Removal in a Sequencing Batch Reactor Treating High-Strength Wastewater," IJERPH, MDPI, vol. 19(9), pages 1-16, May.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:9:p:5653-:d:809646
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    Citations

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    Cited by:

    1. Antonio Faggiano & Oriana Motta & Maria Ricciardi & Francesco Cerrato & Carlos Augusto Garcia Junior & Antonino Fiorentino & Antonio Proto, 2023. "Integrated Anaerobic–Aerobic Moving Bed Biofilm Reactor and Biochar Adsorption for the Efficient Removal of Organic Matter and Nutrients from Brazilian Landfill Leachate," Sustainability, MDPI, vol. 15(18), pages 1-18, September.
    2. Krzysztof Michalski & Magdalena Kośka-Wolny & Krzysztof Chmielowski & Dawid Bedla & Agnieszka Petryk & Paweł Guzdek & Katarzyna Anna Dąbek & Michał Gąsiorek & Klaudiusz Grübel & Wiktor Halecki, 2024. "Examining the Potential of Biogas: A Pathway from Post-Fermented Waste into Energy in a Wastewater Treatment Plant," Energies, MDPI, vol. 17(22), pages 1-18, November.

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