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Integrated urban water management by coupling iron salt production and application with biogas upgrading

Author

Listed:
  • Zhetai Hu

    (The University of Queensland)

  • Lanqing Li

    (Harbin Institute of Technology
    Harbin Institute of Technology)

  • Xiaotong Cen

    (The University of Queensland)

  • Min Zheng

    (The University of Queensland)

  • Shihu Hu

    (The University of Queensland)

  • Xiuheng Wang

    (Harbin Institute of Technology
    Harbin Institute of Technology)

  • Yarong Song

    (The University of Queensland)

  • Kangning Xu

    (Beijing Forestry University)

  • Zhiguo Yuan

    (The University of Queensland
    City University of Hong Kong)

Abstract

Integrated urban water management is a well-accepted concept for managing urban water. It requires efficient and integrated technological solutions that enable system-wide gains via a whole-of-system approach. Here, we create a solid link between the manufacturing of an iron salt, its application in an urban water system, and high-quality bioenergy recovery from wastewater. An iron-oxidising electrochemical cell is used to remove CO2 (also H2S and NH3) from biogas, thus achieving biogas upgrading, and simultaneously producing FeCO3. The subsequent dose of the electrochemically produced FeCO3 to wastewater and sludge removes sulfide and phosphate, and enhances sludge settleability and dewaterability, with comparable or superior performance compared to the imported and hazardous iron salts it substitutes (FeCl2, and FeCl3). The process enables water utilities to establish a self-reliant and more secure supply chain to meet its demand for iron salts, at lower economic and environmental costs, and simultaneously achieve recovery of high-quality bioenergy.

Suggested Citation

  • Zhetai Hu & Lanqing Li & Xiaotong Cen & Min Zheng & Shihu Hu & Xiuheng Wang & Yarong Song & Kangning Xu & Zhiguo Yuan, 2023. "Integrated urban water management by coupling iron salt production and application with biogas upgrading," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42158-w
    DOI: 10.1038/s41467-023-42158-w
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    References listed on IDEAS

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    1. Laura Dardot Campello & Regina Mambeli Barros & Geraldo Lúcio Tiago Filho & Ivan Felipe Silva Santos, 2021. "Analysis of the economic viability of the use of biogas produced in wastewater treatment plants to generate electrical energy," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 23(2), pages 2614-2629, February.
    2. Matouš Vrzala & Miroslava Goňo & Radomír Goňo & Michal Kotulla & Małgorzata Wzorek & Zbigniew Leonowicz, 2022. "Distributed Generation Power Systems in Wastewater Management," Energies, MDPI, vol. 15(17), pages 1-18, August.
    3. Abusoglu, Aysegul & Tozlu, Alperen & Anvari-Moghaddam, Amjad, 2021. "District heating and electricity production based on biogas produced from municipal WWTPs in Turkey: A comprehensive case study," Energy, Elsevier, vol. 223(C).
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