Heatphos process for recovering phosphorus from bio-P sludge before anaerobic digestion

Noboru Takiguchi, Akio Kuroda, Hisao Ohtake, Satoshi Tsuneda

    研究成果: Chapter

    抄録

    Sewage sludge generated in Bio-P processes (also known as enhanced biological phosphorus removal processes) typically contains 3-5% of its dry weight as phosphorus (P). Approximately 60-80% of the P is stored as polyphosphate (polyP) which is a heat-labile polymer of inorganic phosphate (Pi). This chapter describes a simple technology, named "Heatphos," for leaching polyP from Bio-P sludge by heating at 70 °C for about 1 h and recovering Pi from the leachate by the addition of CaCl2 without needing to adjust pH to a high value. Heating sludge for polyP leaching can also improve the digestive efficiency and thus biogas productivity in the subsequent anaerobic sludge digestion at both mesophilic (typically 35-40 °C) and thermophilic (50-60 °C) temperatures. The heat energy required for polyP leaching can be supplied from biogas generated by anaerobic sludge digestion. The demonstration plant with a capacity of treating Bio-P sludge of 0.36 m3/ day has showed that P could be recovered from Bio-P sludge at a rate of approximately 10 kgP/day (c. 3.5 tP/a).

    元の言語English
    ホスト出版物のタイトルPhosphorus Recovery and Recycling
    出版者Springer Singapore
    ページ515-526
    ページ数12
    ISBN(電子版)9789811080319
    ISBN(印刷物)9789811080302
    DOI
    出版物ステータスPublished - 2018 5 25

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    Polyphosphates
    Anaerobic digestion
    Sewage sludge
    Sludge digestion
    Phosphorus
    Leaching
    sludge
    Biogas
    phosphorus
    Biofuels
    leaching
    biogas
    Heating
    heating
    phosphate (inorganic)
    Phosphates
    Demonstrations
    Productivity
    leachate
    Polymers

    Keywords

      ASJC Scopus subject areas

      • Environmental Science(all)
      • Engineering(all)
      • Chemical Engineering(all)

      これを引用

      Takiguchi, N., Kuroda, A., Ohtake, H., & Tsuneda, S. (2018). Heatphos process for recovering phosphorus from bio-P sludge before anaerobic digestion. : Phosphorus Recovery and Recycling (pp. 515-526). Springer Singapore. https://doi.org/10.1007/978-981-10-8031-9_35

      Heatphos process for recovering phosphorus from bio-P sludge before anaerobic digestion. / Takiguchi, Noboru; Kuroda, Akio; Ohtake, Hisao; Tsuneda, Satoshi.

      Phosphorus Recovery and Recycling. Springer Singapore, 2018. p. 515-526.

      研究成果: Chapter

      Takiguchi, N, Kuroda, A, Ohtake, H & Tsuneda, S 2018, Heatphos process for recovering phosphorus from bio-P sludge before anaerobic digestion. : Phosphorus Recovery and Recycling. Springer Singapore, pp. 515-526. https://doi.org/10.1007/978-981-10-8031-9_35
      Takiguchi N, Kuroda A, Ohtake H, Tsuneda S. Heatphos process for recovering phosphorus from bio-P sludge before anaerobic digestion. : Phosphorus Recovery and Recycling. Springer Singapore. 2018. p. 515-526 https://doi.org/10.1007/978-981-10-8031-9_35
      Takiguchi, Noboru ; Kuroda, Akio ; Ohtake, Hisao ; Tsuneda, Satoshi. / Heatphos process for recovering phosphorus from bio-P sludge before anaerobic digestion. Phosphorus Recovery and Recycling. Springer Singapore, 2018. pp. 515-526
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