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Fouling-free membrane filtration with submicron-sized super-fine activated carbon precoating and high-basicity PACl coagulant

Research Project

Project/Area Number 21H04567
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 22:Civil engineering and related fields
Research InstitutionHokkaido University

Principal Investigator

Matsui Yoshihiko  北海道大学, 工学研究院, 名誉教授 (00173790)

Co-Investigator(Kenkyū-buntansha) 松下 拓  北海道大学, 工学研究院, 教授 (30283401)
白崎 伸隆  北海道大学, 工学研究院, 准教授 (60604692)
安藤 直哉  北海学園大学, 工学部, 准教授 (20847595)
Project Period (FY) 2021-04-05 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥42,770,000 (Direct Cost: ¥32,900,000、Indirect Cost: ¥9,870,000)
Fiscal Year 2023: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
Fiscal Year 2022: ¥10,790,000 (Direct Cost: ¥8,300,000、Indirect Cost: ¥2,490,000)
Fiscal Year 2021: ¥20,670,000 (Direct Cost: ¥15,900,000、Indirect Cost: ¥4,770,000)
Keywords環境技術 / 環境材料 / 土木環境工学 / 反応・分離工学 / 水資源
Outline of Research at the Start

低圧膜分離を使った浄水処理は水質や維持管理性など多くの面から期待され、約20年も前から研究開発されている。しかし、根本的な問題であるろ過に伴い膜が汚れ、膜ろ過差圧が上昇し必要駆動力が大きくなる膜ファウリングが課題であり、特に低水質原水への適用を難しくしている。このような中で研究代表者らは高塩基度凝集剤で前処理し、その後に超微粒子吸着材を膜ろ過の直前で間欠添加すると膜ろ過差圧がほとんど上昇しないという興味深い結果を得た。この研究では、この知見を大きく展開し、膜ファウリングを著しく低減した膜ろ過法を世界で初めて創出することを目指す。

Outline of Final Research Achievements

The pretreatment method using pulsed addition of submicron-sized super-fine powdered activated carbon (SSPAC) was applied to three different types of membrane filtration. They are a tubular ceramic inorganic and an organic immersed-membrane filtration system both for vacuum-driven outside-in filtration, and a monolithic ceramic membrane system for pressure-driven inside-out filtration. The results showed that pulse dosing of SSPAC mitigated the increase in trance-membrane pressure rise for the inorganic and organic immersed-membrane filtration systems, due to the precoating and adsorption effects of the SSPAC layer. Pulse dosing of SSPAC combined with a coagulant formed precoat layer on the membrane that was easily removed by hydraulic backwashing. In the monolithic ceramic membrane system, the effectiveness of the cross-flow method for uniform precoat formation was suggested.

Academic Significance and Societal Importance of the Research Achievements

水問題の有力な解決技術として膜分離技術が期待され,その中で MF膜は操作圧が低く適用拡大が期待されて久しいが,普及率が高い状況にはない.この理由は、膜自体が目詰まり(膜ファウリング)を起こしやすく、ろ過のためのエネルギー消費が大きくなる点にあり、このことが膜分離の水処理への普及の最大の障壁となっている.本研究では,この課題の解決策として,超微粉炭(粒径200 nm)、パルス/短期間添加による膜のプレコート、超高塩基度ポリ塩化アルミニウムを検討対象とし、膜ファウリングの革新的抑制技術を開発するとともに、そのメカニズムを解明し、ろ過性と処理水質の両方に優れた前処理-膜ろ過法を提案した.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Comments on the Screening Results   Annual Research Report
  • Research Products

    (11 results)

All 2023 2022 2021

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Overlooked effect of ordinary inorganic ions on polyaluminum-chloride coagulation treatment2023

    • Author(s)
      Chen Yize、Matsui Yoshihiko、Sato Tsutomu、Shirasaki Nobutaka、Matsushita Taku
    • Journal Title

      Water Research

      Volume: 235 Pages: 119909-119909

    • DOI

      10.1016/j.watres.2023.119909

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Suppressing transmembrane-pressure rise by pulse dosing of submicron super-fine powdered activated carbon: Effects of filtration flux, coagulant types, and coagulant-dose timing during precoating2022

    • Author(s)
      Zhao Yuanjun、Matsui Yoshihiko、Kinouchi Yusuke、Seko Takumu、Shirasaki Nobutaka、Matsushita Taku
    • Journal Title

      Journal of Water Process Engineering

      Volume: 49 Pages: 103180-103180

    • DOI

      10.1016/j.jwpe.2022.103180

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effectiveness of pulse dosing of submicron super-fine powdered activated carbon in preventing transmembrane pressure rise in outside-in-type tubular and inside-out-type monolithic ceramic membrane microfiltrations2022

    • Author(s)
      Zhao Yuanjun、Matsui Yoshihiko、Saito Shun、Shirasaki Nobutaka、Matsushita Taku
    • Journal Title

      Separation and Purification Technology

      Volume: 296 Pages: 121403-121403

    • DOI

      10.1016/j.seppur.2022.121403

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Desorption of micropollutant from superfine and normal powdered activated carbon in submerged-membrane system due to influent concentration change in the presence of natural organic matter: Experiments and two-component branched-pore kinetic model2022

    • Author(s)
      Pan Long、Nakayama Akiko、Matsui Yoshihiko、Matsushita Taku、Shirasaki Nobutaka
    • Journal Title

      Water Research

      Volume: 208 Pages: 117872-117872

    • DOI

      10.1016/j.watres.2021.117872

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Hydrolysis of polyaluminum chloride and its effect on coagulation performance: role of inorganic ions2023

    • Author(s)
      陳芸澤, 松井佳彦, 白崎伸隆, 松下拓
    • Organizer
      第26回日本水環境学会シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] Quantifying the effects of inorganic ions in raw water on polyaluminum chloride coagulation by analyzing aluminum hydrolysis2023

    • Author(s)
      Yize Chen, Yoshihiko Matsui, Nobutaka Shirasaki and Taku Matsushita
    • Organizer
      第57回日本水環境学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Pulse dosing of submicron-sized powdered activated carbon avoids irreversible fouling in submerged ceramic membranes while not in monolithic ones2022

    • Author(s)
      Zhao, Y., Matsui Y., Shirasaki, N. and Matsushita T.
    • Organizer
      IWA World Water Congress
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Divalent oxyanion and bicarbonate synergistically enhance hydrolysis and coagulation performance of high-basicity PACl coagulants2022

    • Author(s)
      Chen, Y., Matsui, Y., Shirasaki, N. and Matsushita, T.
    • Organizer
      IWA World Water Congress
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Application of submicron super-fine powdered activated carbon on mitigating membrane fouling in microfiltration systems2022

    • Author(s)
      趙垣鈞
    • Organizer
      第25回日本水環境学会シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] PACl coagulants with the same Al speciation perform differently for production methods and SO42- concentrations2021

    • Author(s)
      Matsui, Y., Nakazawa, Y., Shinno, K., Shirasaki, N. and Matsushita, T.
    • Organizer
      IWA Digital World Water Congress 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pulse dose of 200-nm activated carbon particles after coagulation completely prevents transmembrane pressure rise2021

    • Author(s)
      Zhao, Y., Matsui Y., Kitajima, R., Shirasaki, N., Kinouchi, Y. and Matsushita T.
    • Organizer
      IWA Digital World Water Congress 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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