Investigation of assimilable organic carbon components promoting bacterial regrowth in drinking water and their control in quantity and in quality

• Project/Area Number: 21760416
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Civil and environmental engineering
• Research Institution: Kyoto University
• Principal Investigator: OHKOUCHI Yumiko Kyoto University, 地球環境学堂, 助教 (00391079)
• Project Period (FY): 2009 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2009: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: 残留塩素 / 同化可能有機炭素 / 微生物再増殖 / 浄水処理 / 塩素消毒

Research Abstract

The acceptable level of assimilable organic carbon (AOC) in drinking water for biological stability in water supply systems with minimized chlorine residual was determined as less than 11μgC/L. The AOC removals of biological activated carbon and nanofiltration varied largely depending on water temperature. The AOC removal of anion-exchange was also affected by the components of AOC. These technologies did not satisfy the acceptable AOC level, therefore the reassembling of current treatment processes for enhancement of AOC removal would be needed.

Research Products

• [Journal Article] ブロモデオキシウリジン修飾DNA量に基づいた浄水中の従属栄養細菌迅速推定法の開発 (2010)
  • Author(s): 浅田安廣, 大河内由美子, 伊藤禎彦
  • Journal Title: 環境工学研究論文集 Vol.47 Pages: 119-126
  • Peer Reviewed
• [Journal Article] 溶存有機物を構成する窒素化合物のカルキ臭生成能 (2010)
  • Author(s): 久本祐資, 越後信哉, 伊藤禎彦, 大河内由美子, 小坂浩司
  • Journal Title: 環境工学研究論文集 Vol.47 Pages: 99-107
  • Peer Reviewed
• [Journal Article] 残留塩素を最小化した水道システムにおける微生物学的安定性向上を目的とした膜ろ過法の適用 (2010)
  • Author(s): 大河内由美子, 河野圭浩, Ly Bich Thuy, 伊藤禎彦
  • Journal Title: 環境衛生工学研究 Vol.24, No.3 Pages: 35-38
• [Journal Article] 残留塩素を最小化した水道システムにおける微生物学的安定性向上を目的とした膜ろ過法の適用 (2010)
  • Author(s): 大河内由美子, 河野圭浩, Ly Bich Thuy, 伊藤禎彦
  • Journal Title: 環境衛生工学研究 Volume: 24(3) Pages: 35-38
• [Journal Article] ブロモデオキシウリジン修飾DNA量に基づいた浄水中の従属栄養細菌迅速推定法の開発 (2010)
  • Author(s): 浅田安廣, 大河内由美子, 伊藤禎彦
  • Journal Title: 環境工学研究論文集 Volume: 47 Pages: 119-126
  • Peer Reviewed
• [Journal Article] 溶存有機物を構成する窒素化合物のカルキ臭生成能 (2010)
  • Author(s): 久本祐資, 越後信哉, 伊藤禎彦, 大河内由美子, 小坂浩司
  • Journal Title: 環境工学研究論文集 Volume: 47 Pages: 99-107
  • Peer Reviewed
• [Journal Article] Detection of bacterial regrowth in water distribution system using endotoxin as an alternative indicator (2009)
  • Author(s): Ohkouchi, Y., Ly, B.T., Itoh, S.
  • Journal Title: Advances in Asian Environmental Engineering Vol.8, No.1 Pages: 13-19
  • Peer Reviewed
• [Journal Article] Investigation of related factors to biological stability in drinking water distribution system and the possibility of AOC removal by ion exchange (2009)
  • Author(s): Ly, B.T., Ohkouchi, Y.,Itoh, S.
  • Journal Title: The 8th International symposium on water supply technology Proceedings Pages: 270-278
• [Journal Article] A survey on levels and seasonal changes of assimilable organic carbon (AOC) and its precursors in drinking water
  • Author(s): Ohkouchi, Y.,Ly, B.T., Ishikawa, S., Aoki, Y., Echigo, S., Itoh, S.
  • Journal Title: Environmental Technology (in press.)
  • Peer Reviewed
• [Journal Article] A survey on levels and seasonal changes of assimilable organic carbon (AOC) and its precursors in drinking water
  • Author(s): Ohkouchi, Y., Ly, B.T., Ishikawa, S., Aoki, Y., Echigo, S., Itoh, S.
  • Journal Title: Environmental Technology Volume: (印刷中)
  • Peer Reviewed
• [Presentation] ナノろ過処理によるAOC低減効果と微生物再増殖特性の変化に関する研究 (2011)
  • Author(s): 矢田祐次郎, 大河内由美子, 伊藤禎彦
  • Organizer: 第45回日本水環境学会年会
  • Place of Presentation: 北海道大学(札幌市)
  • Year and Date: 2011-03-20
• [Presentation] 水道水エンドトキシン増大要因となりうる微生物から抽出したエンドトキシン活性の比較 (2011)
  • Author(s): 但馬智之, 野村昌弘, 大河内由美子, 伊藤禎彦
  • Organizer: 第45回日本水環境学会年会
  • Place of Presentation: 北海道大学(札幌市)
  • Year and Date: 2011-03-20
• [Presentation] 残留塩素濃度を低減した水道システムにおける要求水質に関する研究 (2010)
  • Author(s): 大河内由美子, Ly Bich Thuy, 石川卓, 河野圭浩, 伊藤禎彦
  • Organizer: 第61回全国水道研究発表会
  • Place of Presentation: 朱鷺メッセ(新潟市)
  • Year and Date: 2010-05-19
• [Presentation] 浄水処理過程における生物分解性有機炭素の除去特性 (2010)
  • Author(s): 河野圭浩, Ly Bich Thuy, 大河内由美子, 伊藤禎彦
  • Organizer: 第44回日本水環境学会
  • Place of Presentation: 福岡大学(福岡市)
  • Year and Date: 2010-03-15
• [Presentation] Fate of amino acids in drinking water treatment process (2009)
  • Author(s): Aoki, Y., Echigo, S., Ohkouchi, Y., Itoh, S.
  • Organizer: 6th Netherlands-Japan Workshop on Water Technology
  • Place of Presentation: 京都大学(京都市)
  • Year and Date: 2009-10-14
• [Presentation] Our approaches for reducing chlorinous odor to establish satisfactory water supply systems in Japan (2009)
  • Author(s): Ohkouchi, Y., Echigo, S., Hirayama, N., Itoh, S.
  • Organizer: The 6th Netherlands-Japan Workshop on Water Technology
  • Place of Presentation: 京都大学(京都市
  • Year and Date: 2009-10-14
• [Presentation] Fate of amino acids drinking water treatment process (2009)
  • Author(s): Aoki, Y., Echigo, S., Ohkouchi, Y., Itoh, S.
  • Organizer: 6th Netherlands-Japan Workshop on Water Technology
  • Place of Presentation: 京都大学(京都市)
  • Year and Date: 2009-10-14
• [Presentation] Investigation of related factors to biological stability in drinking water distribution system and the possibility of AOC removal by ion exchange (2009)
  • Author(s): Ly, B.T., Ohkouchi, Y., Itoh, S.
  • Organizer: The 8th International Symposium on Water Supply Technology
  • Place of Presentation: 神戸国際会議場(神戸市)
  • Year and Date: 2009-06-10