鉄塩凝集剤と乳製カゼインを用いた凝集・泡沫分離法による懸濁物除去に関する基礎的研究 : カゼインの役割  [in Japanese] Removal of Suspended Substances by Coagulation and Foam Separation Using Ferric Coagulant and Milk Casein : The Role of Casein  [in Japanese]

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Abstract

Foam separation using a coagulant (iron or aluminum) and milk casein is effective for removing suspended matter such as kaolin particles, suspended solids in wastewater, and phytoplankton. However, the function of casein in this separation is unclear. In this study, to clarify the role of casein in coagulation and foam separation, the characteristics of casein adsorption onto flocs that were made up of kaolin and Fe(OH)<sub>3</sub> and the removal of suspended substances by the separation were investigated.<br>Both of adsorbing casein onto the flocs as a collector and remaining casein in the solution as a frother were necessary in order to obtain the high removal rate (above 90%). The optimum pH range was 6.8-7.6. The required amount of adsorbing casein onto the flocs was 0.5g-casein/g-Fe. To obtain more than 90% turbidity removal from the suspended solution of kaolin (200mg·<i>l</i><sup>-1</sup>), greater than 5mg·<i>l</i><sup>-1</sup> of residual casein with 10mg-Fe·<i>l</i><sup>-1</sup> of coagulant dosage was needed. The amounts of adsorbing casein and the concentration of residual casein were estimated from the adsorption rate of casein. The suitable dosage of casein and the mixing time for the foam separation were determined by the adsorption rate.

Journal

  • Journal of Japan Society on Water Environment

    Journal of Japan Society on Water Environment 24(5), 317-324, 2001-05-10

    Japan Society on Water Environment

References:  16

Cited by:  5

Codes

  • NII Article ID (NAID)
    10008004997
  • NII NACSIS-CAT ID (NCID)
    AN10372439
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    09168958
  • NDL Article ID
    5802537
  • NDL Source Classification
    ZN5(科学技術--建設工学・建設業--都市工学・衛生工学)
  • NDL Call No.
    Z16-1045
  • Data Source
    CJP  CJPref  NDL  J-STAGE 
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