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Exploring and controlling heterotrophic bacteria with high endotoxin activity in the course of drinking water purification process

Research Project

Project/Area Number 18H01575
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22060:Environmental systems for civil engineering-related
Research InstitutionNational Institute of Public Health

Principal Investigator

Simazaki Dai  国立保健医療科学院, その他部局等, 上席主任研究官 (60322046)

Co-Investigator(Kenkyū-buntansha) 春日 郁朗  東京大学, 大学院工学系研究科(工学部), 准教授 (20431794)
秋葉 道宏  国立保健医療科学院, その他部局等, 主任研究官 (00159336)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥13,650,000 (Direct Cost: ¥10,500,000、Indirect Cost: ¥3,150,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Keywordsエンドトキシン / 水道 / 浄水処理 / 生物活性炭 / 微生物群集構造
Outline of Final Research Achievements

Endotoxin (ET) is found in the extracellular membrane of Gram-negative bacteria, which are common in the water environment. ET is a physiologically active substance that could cause various adverse health impacts to human when it enters the human body through blood and is of increasing concern among medical professionals conducting dialysis therapies. In this study, we examined the behavior of ET activity in the course of advanced water purification process at several domestic water treatment plants, and also evaluated the ET producing capacity/characteristics of several bacterium isolated from biological activated carbon samples. As an outcome of this study, we identified several high ET-producing bacteria groups in biological activated carbon and their ET-producing ability/characteristics, clarified ET removal capability of each water treatment process, and the possibility of controlling ET by operating conditions of key water treatment processes.

Academic Significance and Societal Importance of the Research Achievements

生物活性炭ろ過においてエンドトキシン産生の中心となる細菌群を同定し、水処理プロセスでの挙動を考慮した制御方法の提案をめざす点で有用性が高い。また、生物活性炭の水質変換機能と群集構造とを関連づける国内外の諸研究の中で、当研究成果はエンドトキシン産生に寄与する細菌を対象としており、新規性ならびに独創性が高い。当研究の成果は、水道水および医療用水の安全性と信頼性のさらなる向上に資することが期待される。

Report

(4 results)
  • 2021 Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (12 results)

All 2022 2021 2020 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Fate of Sulfate in the Course of Japanese Drinking Water Purification Plants −Implications for Dialysis Therapy−2020

    • Author(s)
      Dai SIMAZAKI, Kousei FUTAMI, Kodai ICHIMARU, Taiki KUMAGAI, Susumu KONUMA, Toshiaki SAITO, Michihiro AKIBA
    • Journal Title

      Journal of Water and Environment Technology

      Volume: 18 Issue: 1 Pages: 54-61

    • DOI

      10.2965/jwet.19-079

    • NAID

      130007796198

    • ISSN
      1348-2165
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 国内高度浄水処理工程における粒状活性炭単離細菌のエンドトキシン産生特性調査2022

    • Author(s)
      中川卓哉,島﨑大,春日郁朗,秋葉道宏
    • Organizer
      第72回全国水道研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Occurrence and fate of endotoxin in the course of advanced water purification process2021

    • Author(s)
      Dai SIMAZAKI
    • Organizer
      The 4th International Forum on Asian Water Environment Technology (IFAWET-4)
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] 水道の高度浄水処理過程におけるエンドトキシン活性の挙動2021

    • Author(s)
      島﨑大,小坂浩司,秋葉道宏
    • Organizer
      日本オゾン協会第30回年次研究講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 浄水場から医療施設に至るエンドトキシン活性・生菌数・全菌数の挙動2021

    • Author(s)
      島﨑大,秋葉道宏
    • Organizer
      第66回日本透析医学会学術集会・総会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 浄水場の粒状活性炭ろ過槽から単離した従属栄養細菌のエンドトキシン産生特性2020

    • Author(s)
      島﨑大,ジャンタラカセムチョティワット,秋葉道宏,中川卓哉,春日郁朗
    • Organizer
      第54回日本水環境学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 浄水場の活性炭ろ過槽におけるエンドトキシン高産生細菌の単離と同定2020

    • Author(s)
      島﨑大,秋葉道宏
    • Organizer
      第65回日本透析医学会学術集会・総会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Endotoxin-producing capability of heterotrophic bacteria in granular activated carbon filters for advanced water purification process2019

    • Author(s)
      Simazaki, D., Nakagawa, T., Kasuga, I., Akiba, M.
    • Organizer
      8th IWA Microbial Ecology and Water Engineering Specialist Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 浄水処理におけるエンドトキシン活性の挙動ならびに粒状活性炭中エンドトキシン産生細菌の毎月調査2019

    • Author(s)
      中川卓哉,島﨑大,春日郁朗,秋葉道宏
    • Organizer
      第53回日本水環境学会年会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 国内の浄水場におけるエンドトキシン活性・全菌数・生菌数の挙動2019

    • Author(s)
      島﨑 大,秋葉 道宏
    • Organizer
      第64回日本透析医学会学術集会・総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 浄水処理工程におけるエンドトキシン活性の経月変化ならびに粒状活性炭単離菌のエンドトキシン生成能の評価2019

    • Author(s)
      中川卓哉,島﨑大,春日郁朗,秋葉道宏
    • Organizer
      令和元年度全国会議(水道研究発表会)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Endotoxin-producing Capability of Heterotrophic Bacteria in Granular Activated Carbon Filters for Advanced Water Purification Process2019

    • Author(s)
      Dai SIMAZAKI, Takuya NAKAGAWA, Ikuro KASUGA, Michihiro AKIBA
    • Organizer
      8th IWA Microbial Ecology and Water Engineering Specialist Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2023-01-30  

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