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Energy efficiency in waste water treatments plants: Optimization of activated sludge process coupled with anaerobic digestion

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  • Descoins, N.
  • Deleris, S.
  • Lestienne, R.
  • Trouvé, E.
  • Maréchal, F.

Abstract

This paper presents a study concerning the optimization of a Waste Water Treatment process. The process deals with carbon and nitrogen removal and includes activated sludge reactors coupled with an anaerobic digestion reactor. Nitrification and de-nitrification biochemical reactions are due to the biological activity of heterotrophic and autotrophic micro-organisms occurring inside the reactors. Rigorous Plant-Wide models that represent the main biochemical transformations have been constructed as per the CEIT approach [1]. The energy consumption for each Physical Unit Operation (P.U.O.) involved in the flow-sheet is evaluated and a full link is made between the biological activity and the electrical demand or production. Steady-state mathematical optimizations are then computed and the influence of primary settling efficiency on electrical autonomy is quantified and demonstrated. The ammonium recycling from digestion to activated sludge reactors is also demonstrated to be a limiting factor for the overall energy efficiency, as well as the C-substrate availability for denitrifying. Some conclusions are then drawn to improve the global electrical efficiency of the system.

Suggested Citation

  • Descoins, N. & Deleris, S. & Lestienne, R. & Trouvé, E. & Maréchal, F., 2012. "Energy efficiency in waste water treatments plants: Optimization of activated sludge process coupled with anaerobic digestion," Energy, Elsevier, vol. 41(1), pages 153-164.
    • Handle: RePEc:eee:energy:v:41:y:2012:i:1:p:153-164
    DOI: 10.1016/j.energy.2011.03.078
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    Cited by:

    1. Grágeda, Mario & González, Alonso & Alavia, Wilson & Ushak, Svetlana, 2015. "Development and optimization of a modified process for producing the battery grade LiOH: Optimization of energy and water consumption," Energy, Elsevier, vol. 89(C), pages 667-677.
    2. Beata Karolinczak & Wojciech Dąbrowski & Radosław Żyłka, 2021. "Evaluation of Dairy Wastewater Treatment Systems Using Carbon Footprint Analysis," Energies, MDPI, vol. 14(17), pages 1-10, August.
    3. Yu, Liang & Ma, Jingwei & Frear, Craig & Zhao, Quanbao & Dillon, Robert & Li, Xiujin & Chen, Shulin, 2013. "Multiphase modeling of settling and suspension in anaerobic digester," Applied Energy, Elsevier, vol. 111(C), pages 28-39.
    4. Giuseppe Campo & Antonella Miggiano & Deborah Panepinto & Mariachiara Zanetti, 2023. "Enhancing the Energy Efficiency of Wastewater Treatment Plants through the Optimization of the Aeration Systems," Energies, MDPI, vol. 16(6), pages 1-15, March.
    5. Nie, Yulun & Chen, Rong & Tian, Xike & Li, Yu-You, 2017. "Impact of water characteristics on the bioenergy recovery from sewage treatment by anaerobic membrane bioreactor via a comprehensive study on the response of microbial community and methanogenic activ," Energy, Elsevier, vol. 139(C), pages 459-467.
    6. Vojtěch Zejda & Vítězslav Máša & Šárka Václavková & Pavel Skryja, 2020. "A Novel Check-List Strategy to Evaluate the Potential of Operational Improvements in Wastewater Treatment Plants," Energies, MDPI, vol. 13(19), pages 1-21, September.

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