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排水の飲用再利用プロセスにおけるエンドトキシンの制御

Research Project

Project/Area Number 14F04372
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section外国
Research Field Civil and environmental engineering
Research InstitutionHokkaido University

Principal Investigator

船水 尚行  北海道大学, 工学研究院, 教授 (10113622)

Co-Investigator(Kenkyū-buntansha) GUIZANI MOKHTAR  北海道大学, 工学研究院, 外国人特別研究員
GUIZANI Mokhtar  北海道大学, 工学(系)研究科(研究院), 外国人特別研究員
Project Period (FY) 2014-04-25 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2016: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2015: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2014: ¥300,000 (Direct Cost: ¥300,000)
Keywordsエンドトキシン / 土壌処理 / 凝集処理 / 正荷電膜 / 排水再利用 / 毒性物質 / LPS / 処理 / 下水処理 / 国際研究者交流
Outline of Annual Research Achievements

LPS endotoxins are bacterial by-products that present a possible threat to humans if ingested. Investigation explored different removal methods to remove the LPS endotoxin from the reclaimed wastewater:1)Long term Soil aquifer treatment; 2)Coagulation and flocculation; 3)filtration through positively charged micro structure membranes.
1)Long term operation of soil aquifer treatment of endotoxin proved that the efficiency decreases over time. After one year of operation, bacterial growth in the soilleads to LPS endotoxin production in the soil lowering its removal efficiency. In addition, longer operation leads to a degradation of the soil adsorption capacity.
2)Coagulation and flocculation process provided satisfactory results in reducing LPS endotoxins in water as a first barrier. The highest endotoxin removal was achieved at an aluminum sulfate dose of 80 mg/L at a pH of 4.69. However the optimum pH for DOC and turbidity removal is 6.35.The residual LPS endotoxin concentration was significantly higher than the reported value in tap and groundwater. This suggests a need for further treatments for safe potable reuse.
3)With respect to positively charged micro structure membranes, the study confirmed the assumption that positively charged membranes are an effective alternative for LPS endotoxin removal from reclaimed wastewater. Indeed, comparable or even better removal efficiency of LPS endotoxin Removal using positively charged membranes than the microfiltration was observed, even though it has a larger pore size.

Research Progress Status

28年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

28年度が最終年度であるため、記入しない。

Report

(3 results)
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • 2014 Annual Research Report
  • Research Products

    (10 results)

All 2017 2016 2015 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (5 results) (of which Int'l Joint Research: 5 results)

  • [Int'l Joint Research] Monterey Institute of technology(Mexico)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Removal of LPS endotoxin from reclaimed wastewater through adsorption using soil2017

    • Author(s)
      Guizani Mokhtar, Kato Hideyaki, Funamizu Noyuki
    • Journal Title

      Journal of water treatment and desalination

      Volume: 印刷中

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Salt removal from soil during rainy season of semi-arid climate following an assumed salt accumulation from previous cultivations fertilized with urine2016

    • Author(s)
      Guizani Mokhtar, Fuji Takahisa, Hijikata Noaki, Funamizu Naoyuki
    • Journal Title

      Euro-Mediterranean Journal for Environmental Integration

      Volume: 1 Issue: 1

    • DOI

      10.1007/s41207-016-0010-9

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Storm Water Harvesting in Saudi Arabia: a Multipurpose Water Management Alternative2016

    • Author(s)
      Guizani Mokhta
    • Journal Title

      Journal of Water Resources Management

      Volume: 30 Issue: 5 Pages: 1819-1833

    • DOI

      10.1007/s11269-016-1255-4

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Assessment of Endotoxin Removal from Reclaimed Wastewater Using Coagulation-Flocculation2016

    • Author(s)
      Guizani, M, Lopez Zavala and Funamizu Naoyuki
    • Journal Title

      Journal of Water Resource and Protection JWARP

      Volume: 8 Issue: 09 Pages: 855-864

    • DOI

      10.4236/jwarp.2016.89070

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] Use of Electro-adsorptive membranes to remove LPS endotoxin from reclaimed wastewater2016

    • Author(s)
      Guizani Mokhtar and Funamizu Naoyuki
    • Organizer
      13th IWA Leading Edge Conference on water and wastewater technologies
    • Place of Presentation
      Jerez de la Frontera, Spain
    • Year and Date
      2016-06-13
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Use of electro-adsorptive membrane to remove LPS endotoxin from reclaimed wastewater2016

    • Author(s)
      Guizani M, Funamizu N.
    • Organizer
      14th IWA leading edge conference on water and wastewater technologies
    • Place of Presentation
      Jerez de la Frontera, Spain
    • Year and Date
      2016-06-13
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Soil salinity control following urine use as a fertilizer in semi-arid land: case of Burkina Faso2016

    • Author(s)
      Guizani M, Fujii T, Funamizu N.
    • Organizer
      Tunisian Japanese symposium on society and technology TJASSST
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      2016-02-23
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] removal of LSP endotoxin from reclaimed wastewater through adsorption using soil2015

    • Author(s)
      Guizani M, Kato H, Funamizu N.
    • Organizer
      5th Maghreb conference on desalination and water treatment
    • Place of Presentation
      Hammamet, Tunisia
    • Year and Date
      2015-12-21
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Long-term operation of soil aquifer treatment system for LPS endotoxin removal2015

    • Author(s)
      Guizani M, kato H, Funamizu N.
    • Organizer
      The 2015 International Workshop on Occurence and Control of Tastes, Odours, and Algal Toxins in Waters
    • Place of Presentation
      Xiamen, China
    • Year and Date
      2015-10-29
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research

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Published: 2015-01-22   Modified: 2024-03-26  

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