Performance of Calcium Silicate Hydrate Briquettes Produced from Fly Ash and Slaked Lime in Disposal of Wastewater

DOI NDLデジタルコレクション 参考文献6件
  • HIRASHIMA Yasushi
    Tokushima Prefectural Industrial Technology Center
  • MORIGA Toshihiro
    Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
  • ASHIDA Toshifumi
    Department of Chemistry and Environmental Technology, Faculty of Engineering, Kinki University
  • KANEZAKI Eiji
    Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima
  • NAKABAYASHI Ichiro
    Department of Chemical Science and Technology, Faculty of Engineering, The University of Tokushima

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説明

Hydrothermal reaction of fly ash and slaked lime produces a porous briquette which is composed of amorphous calcium silicate, a tobermorite-like compound and hydrogarnet. It is essential for the molar ratio (calcium oxide)/(silicon dioxide) of the briquette to be 0.3 to achieve high performance in the purification of wastewater through improved microorganism-carrying ability. The chemical oxygen demand (CODMn) index in artificial, non-fecal drainage decreases more rapidly with the use of the briquettes than that without the briquettes. The macroscopic configuration of the briquettes is an important factor in the water-purification ability, although the high specific surface area of the briquettes does not affect the performance. By increasing the circulation flow rate of the wastewater, the purification performance is improved considerably.

収録刊行物

  • 材料

    材料 51 (6Appendix), 68-73, 2002

    公益社団法人 日本材料学会

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