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2006 Fiscal Year Final Research Report Summary

IMPROVEMENT OF DRINKING WATER QUALITY THROUGH THE OPTIMIZATION OF RAPID-MIX CONDITIONS IN COLD REGIONS

Research Project

Project/Area Number 17560481
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Civil and environmental engineering
Research InstitutionKITAMI INSTITUTE OF TECHNOLOGY

Principal Investigator

EBIE Kunio  SCHOOL OF TECHNOLOGY, DEPARTMENT OF CIVIL ENGINEERING, PROFESSOR, 工学部, 教授 (10001223)

Project Period (FY) 2005 – 2006
KeywordsDRINKING WATER PURIFICATION / COAGULATION & MICRO-FLOC FORMATION / AGITATION STRENGTH / KAOLIN CLAY / HUMIC SUBSTANCES / JAR TESTS / COAGULANTS / PARTICLE ANALYSER / DYNAMIC ANALYSIS
Research Abstract

(1) From the dynamic coagulation experiment, it was made clear that an agglomeration process after a coagulant injection comprises the following three stages, that is, the preparation, the progression and the stabilization, and the number of un-agglomeration particles in the stabilization stage was greatly influenced by coagulant injection rate, and both rapid agitation and slow speed agitation.
(2) Strengthening of both the rapid agitation and the slow speed agitation, even if either case is done, are effective for the improvement of treated water quality. In addition, total G.T value which minimizes treated water turbidity and STR differs from one coagulant to another, and in case of the PAC use, total G.T values necessary for achieving treated water turbidity lower than 0.5 mg/L and STR smaller than 2, are 160000〜300000.
(3) With the water temperature lowering, the time until the stabilization stage appeared was lengthened, and the number of remaining un-agglomeration particles in the … More stage increased. The reason of retarding the appearance of stabilization stage is because the preparation stage was prolonged. However, there is no significant change in the length of the progression stage. The reason of the residual particle number increasing in the stabilization stage is therefore because the agglomeration speed lowers in the progression stage. Adoption of high total G.T value was considerably effective in reducing the number of residual particles.
(4) How to utilize the non-ionic polymer for enhancing the treatability of turbidity and STR when water temperature was reduced was examined. As a result, the effectiveness of the rapid agitation method of serial two steps (the first step : PAC injection, and the second step: non-ionic polymer injection) was verified.
(5) From experiments on the removal of humic substances which are of special concern in cold regions, the following were clarified : that the sufficient rapid agitation until it comes in the agglomeration stabilization stage is the most important and that the combined use of optimization of GR value and PAC injection rate is effective for lowering both STR and color degree. Less

  • Research Products

    (14 results)

All 2007 2006 2005

All Journal Article (14 results)

  • [Journal Article] 急速撹拌による粒子集塊化の動的挙動と粒子数の低減化に関する研究2007

    • Author(s)
      海老江 邦雄
    • Journal Title

      水道協会雑誌 76・5号

      Pages: 1-13

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] DYNAMICS OF PARTICLE AGGLOMERATION AND PARTICLE NUMBER REDUCTION BY RAPID AGITATION2007

    • Author(s)
      KUNIO EBIE
    • Journal Title

      JOURNAL OF JAPAN WATER WORKS ASSOCIATION 76-5

      Pages: 1-13

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] DYNAMIC ANALYSIS OF COAGULATION OF SUSPENDED PARTICLES IN LOW-TURBIDITY WATER SOURCEC WITH PACL AND PSI COAGULANTS2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      WATER SCIENCE & TECHNOLOGY 6・1

      Pages: 185-192

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 急速撹拌の適正化による河川表流水の凝集沈澱処理に関する研究2006

    • Author(s)
      海老江 邦雄
    • Journal Title

      水道協会雑誌 75・7

      Pages: 2-13

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] NEW MEASUREMENT PRINCIPLE AND BASIC PERFORMANCE OF HIGH-SENSITIVITY TURBIDIMETER WITH TWO OPTICAL SYSTEMS IN SERIES2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      Water Research 40・2

      Pages: 683-691

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] DYNAMIC ANALYSIS OF COAGULATION AIMED AT RDUCING SUSPENDED PARTCLE NUMBER THROUGH THE OPTIMIZATION OF RAPID-MIX CONDITIONS2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      PROCEEDINGS OF THE 2^<ND> EUROPEAN CONFERENCE ON FILTRATION AND SEPARATION

      Pages: 166-171

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A STUDY ON REDUCING THE NUMBER OF PRIMARY PARTICLES BY TWO-STEP SERIES RAPID AGITATION WITH PACL AND NONIONIC POLYMER2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      PROCEEDINGS OF THE 7^<TH> INTERNATIONAL SYMPOSIUM ON WATER SUPPLY TECHNOLOGY

      Pages: 432-442

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] IMPROVEMENT OF THE TREATABILITY OF SURFACE WATER BY COAGULATION AND SEDIMENTATION THROUGH THE OPTIMIZATION OF RAPID AGITATION PARAMETERS2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      JOURNAL OF JAPAN WATER WORKS ASSOCIATION 75-7

      Pages: 2-13

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] DYNAMIC ANALYSIS OF COAGULATION OF SUSPENDED PARTICLES IN LOW-TURBIDITY WATER SOURCE WITH PACLAND PSI COAGULANTS2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      WATER SCIENCE & TECHNOLOGY Vol.6, -No.1

      Pages: 185-192

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] NEW MEASUREMENT PRINCIPLE AND BASIC PERFORMANCE OF HIGH-SENSITIVITY TURBIDIMETER WITH TWO OPTICAL SYSTEMS IN SERIES2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      WATER RESEARCH 40-2

      Pages: 683-691

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] DYNAMIC ANALYSIS OF COAGULATION AIMED AT REDUCING SUSPENDED PARTICLE NUMBER THROUGH THE OPTIMIZATION OF RAPID-MIX CONDITIONS2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      PROCEEDIGS OF THE 2^<ND> EUROPEAN CONFERENCE ON FILTRATION AND SEPARATION

      Pages: 166-171

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A STUDY ON REDUCING THE NUMBER OF PRIMARY PARTICLES BY TWO-STEP SERIES RAPID AGITATION WITH PACLAND NONIONIC POLYMER2006

    • Author(s)
      KUNIO EBIE
    • Journal Title

      PROCEEDINGS OF THE 7^<TH> INTERNATIONAL SYMPOSIUM ON WATER SUPPLY TECHNOLOGY

      Pages: 432-442

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] NOVEL TECHNOLOGY FOR IMPROVING THE TREATABILITY OF TURBIDIZING SUBSTANCES BY COAGULATION AND SEDIMENTATION2005

    • Author(s)
      KUNIO EBIE
    • Journal Title

      WATER SCIENCE & TECHNOLOGY 4・5-6

      Pages: 78-85

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] NOVEL TECHNOLOGY FOR IMPROVING THE TREATABILITY OF TURBIDIZING SUBSTANCES BY COAGULATION AND SEPARATION2005

    • Author(s)
      KUNIO EBIE
    • Journal Title

      WATER SCIENCE & TECHNOLOGY Vol.4-No.5-6

      Pages: 78-85

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2008-05-27  

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