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Combining Shift to Biogas Production in a Large WWTP in China with Optimisation of Nitrogen Removal

Author

Listed:
  • Mónica Vergara-Araya

    (Department for Water, Environment, Construction, and Safety, Magdeburg-Stendal University of Applied Sciences, 39114 Magdeburg, Germany)

  • Verena Hilgenfeldt

    (Institute Water Infrastructure Resources, University of Kaiserslautern (TUK), 67663 Kaiserslautern, Germany)

  • Heidrun Steinmetz

    (Institute Water Infrastructure Resources, University of Kaiserslautern (TUK), 67663 Kaiserslautern, Germany)

  • Jürgen Wiese

    (Department for Water, Environment, Construction, and Safety, Magdeburg-Stendal University of Applied Sciences, 39114 Magdeburg, Germany)

Abstract

Despite the huge current challenges in sewage sludge treatment and disposal in China, anaerobic sludge stabilisation (AnSS) is still not a state-of-the-art process in WWTP in the country. However, the potential benefits of anaerobic sludge stabilisation may outweigh the drawbacks. One of these drawbacks is the backload from the sludge liquor that increases the nutrient load in the biological treatment stage. This work shows via computer modelling that not only can the sludge production and disposal costs be significantly reduced, but also that, with sensible automation and operational strategies (e.g., bypass of primary clarifiers, use of a centrate dosing strategy, incorporation of ammonium nitrogen sensors, etc.), the effects of the backload can be counteracted for nitrogen removal, even considering that wastewater in China often has an unfavourable C/N ratio for nitrogen removal. The tested strategies would even improve the overall plant performance in terms of norm compliance, sludge production, energy use, and energy production

Suggested Citation

  • Mónica Vergara-Araya & Verena Hilgenfeldt & Heidrun Steinmetz & Jürgen Wiese, 2022. "Combining Shift to Biogas Production in a Large WWTP in China with Optimisation of Nitrogen Removal," Energies, MDPI, vol. 15(8), pages 1-13, April.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:8:p:2710-:d:788534
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    References listed on IDEAS

    as
    1. Hauck, Mara & Maalcke-Luesken, Francisca A. & Jetten, Mike S.M. & Huijbregts, Mark A.J., 2016. "Removing nitrogen from wastewater with side stream anammox: What are the trade-offs between environmental impacts?," Resources, Conservation & Recycling, Elsevier, vol. 107(C), pages 212-219.
    2. Smith, Kate & Liu, Shuming & Liu, Ying & Guo, Shengjie, 2018. "Can China reduce energy for water? A review of energy for urban water supply and wastewater treatment and suggestions for change," Renewable and Sustainable Energy Reviews, Elsevier, vol. 91(C), pages 41-58.
    3. Mónica Vergara-Araya & Verena Hilgenfeldt & Di Peng & Heidrun Steinmetz & Jürgen Wiese, 2021. "Modelling to Lower Energy Consumption in a Large WWTP in China While Optimising Nitrogen Removal," Energies, MDPI, vol. 14(18), pages 1-24, September.
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    Cited by:

    1. Jakub Mukawa & Tadeusz Pająk & Tadeusz Rzepecki & Marian Banaś, 2022. "Energy Potential of Biogas from Sewage Sludge after Thermal Hydrolysis and Digestion," Energies, MDPI, vol. 15(14), pages 1-15, July.
    2. Muhammad Irfan & Sharjeel Waqas & Javed Akbar Khan & Saifur Rahman & Izabela Kruszelnicka & Dobrochna Ginter-Kramarczyk & Stanislaw Legutko & Marek Ochowiak & Sylwia Włodarczak & Krystian Czernek, 2022. "Effect of Operating Parameters and Energy Expenditure on the Biological Performance of Rotating Biological Contactor for Wastewater Treatment," Energies, MDPI, vol. 15(10), pages 1-13, May.

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