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Development of ozone-added activated sludge system for reduction of biorisk caused by antibiotic resistance microorganisms

Research Project

Project/Area Number 21H01464
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 InstitutionKyoto University

Principal Investigator

NISHIMURA Fumitake  京都大学, 工学研究科, 教授 (60283636)

Co-Investigator(Kenkyū-buntansha) 中田 典秀  神奈川大学, 化学生命学部, 准教授 (00391615)
井原 賢  高知大学, 教育研究部自然科学系農学部門, 准教授 (70450202)
竹内 悠  京都大学, 工学研究科, 助教 (70835272)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2023: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥9,230,000 (Direct Cost: ¥7,100,000、Indirect Cost: ¥2,130,000)
Keywords薬剤耐性菌 / 薬剤耐性遺伝子 / オゾン / オゾン添加活性汚泥法 / 嫌気性消化 / メタン発酵 / オゾン処理 / オゾン添加活性汚泥システム / 薬剤耐性微生物 / バイオリスク / 抗生物質
Outline of Research at the Start

従来より廃水処理システム安定化や汚泥減容、バイオガス発生促進効果等の利点があるオゾン添加活性汚泥法を、その利点を活かしつつ同時に残存抗菌薬除去・薬剤耐性菌(ARB)および耐性遺伝子(ARG)の低減にも活用する、新規発想のバイオリスク低減型畜産廃棄物(家畜糞尿・廃水)プロセスとして活用することとし、その機序を明らかにするとともに、鍵となる設計操作因子の探索とその適切な範囲を示すことを目的とする。

Outline of Final Research Achievements

The direct application of ozone to activated sludge is expected to be effective in reducing the risk of Antibiotic resistance (Antibiotic-resistant bacteria (ARBs) and Antibiotic-resistance genes (ARGs)), which have attracted attention in recent years. In particular, when an anaerobic digestion process is incorporated, a synergistic effect with the reduction of Antibiotic resistance risk due to anaerobic conditions can be expected in addition to the promotion of methane fermentation. In this study, we quantified the effect of ozone addition on Antibiotic resistance risk reduction. The results showed that ozone consumption per unit solid volume is an important design and operating parameter for ozone treatment, and that E. coli (both nonselective and Antibiotic-resistant) can be inactivated to below the quantification limit at ozone consumption levels of 50 to 70 mgO3/gTS.

Academic Significance and Societal Importance of the Research Achievements

薬剤耐性による健康リスクは、抗生物質の使用増大とともに高まり、その対応が希求されている。しかし、生活排水由来のリスク、畜産排泄物やそれを原料とした肥料等を通じてのリスクが指摘されている。現在の主流である生物学的処理法では、薬剤耐性遺伝子の水平伝播による耐性菌増加の可能性もあり、本リスク低減には限界もある。一方で、オゾン処理は代表的な物理化学的処理法であり、生物処理との併用で、種々の相乗効果が見込まれる。本研究により、薬剤耐性リスク削減にもオゾン処理は効果があることがわかり、生物処理と併せたシステム構築や必要な操作条件を明らかにした。関連リスク低減手法のひとつとして、その有効性を明らかにした。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (11 results)

All 2024 2023 2022 2021

All Presentation (11 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] オゾン可溶化処理による余剰汚泥中の薬剤耐性菌及び薬剤耐性遺伝子の除去効果の評価2024

    • Author(s)
      方盛鈞、朴耿洙、林東範、西村文武
    • Organizer
      オゾン協会
    • Related Report
      2023 Annual Research Report
  • [Presentation] オゾンを用いた余剰汚泥の可溶化処理による薬剤耐性の除去と嫌気性消化への影響2024

    • Author(s)
      方盛鈞、朴耿洙、林東範、西村文武
    • Organizer
      第61回 下水道研究発表会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Removal of Antibiotic Resistant Bacteria and Antibiotic Resistance Genes as well as effects on microbial community and anaerobic digestion by ozone-based disintegration of excess sludge2024

    • Author(s)
      FANG Sheng-Chun, PARK Kyoungsoo, IM Dongbeom, NISHIMURA Fumitake
    • Organizer
      2024 International Ozone Association-Pan American Group (IOA- PAG) Annual Conference & Expo
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Removal characteristics of antibiotics, antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in secondary effluent by Ozone-cathode microbial fuel cell(O-MFC).2023

    • Author(s)
      FENGLONG FAN, MINGDONG CHANG, JIA MIAO, HARUAKA TAKEUCHI, DONGBEOM IM, FUMITAKE NISHIMURA, OSAMU NISHIMURA
    • Organizer
      第57回 日本水環境学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 活性汚泥の直接オゾン処理による薬剤耐性大腸菌および薬剤耐性遺伝子の 除去効果に関する研究2023

    • Author(s)
      方盛鉤、朴耽沫、西村文武
    • Organizer
      第23回 環境技術学会年次大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Removal characteristics of antibiotics, antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) in secondary effluent by Ozone-cathode microbial fuel cell(O-MFC)2023

    • Author(s)
      Fenglong Fan, Mingdong Chang, Jia Miao, Haruaka Takeuchi, Dongbeom Im, Fumitake Nishimura, Xian Cao, Osamu Nishimura
    • Organizer
      第57回 日本水環境学会年会講演集, p.74, 2023.03.
    • Related Report
      2022 Annual Research Report
  • [Presentation] Removal characteristics of antibiotics resistance genes using bioelectrochemical system(BES)2022

    • Author(s)
      Fenglong FAN, Fumitake NISHIMURA, Xian CAO, Osamu NISHIMURA
    • Organizer
      第25回 日本水環境学会シンポジウム講演集, p.186, 2022.
    • Related Report
      2022 Annual Research Report
  • [Presentation] 牛ふん堆肥化の肥料効果と抗生物質耐性遺伝子低減に及ぼす熱加水分解前処理の影響2022

    • Author(s)
      陳 奕人, Pham Minh Ngoc, 西村 文武, 井原 賢
    • Organizer
      第22 回環境技術学会年次大会予稿集, pp.65-66, 2022.10.22.
    • Related Report
      2022 Annual Research Report
  • [Presentation] Effect of moisture content on the removal rate of ARB and ARGs during cattle manure composting2022

    • Author(s)
      Minh Ngoc PHAM, Fumitake NISHIMURA, Masaru IHARA, Ryota GOMI
    • Organizer
      The 3rd International Conference on Green Technology for Sustainable Environment 2022.
    • Related Report
      2022 Annual Research Report
  • [Presentation] Evaluation of Ozonation on Removal Efficiency of Antibiotic Resistant Bacteria and Genes, and Chemical Indicators in Secondary Effluent at a Sewage Treatment Plant2021

    • Author(s)
      K. Park, D. Kondo, B. Zhao, H. Wada, N. Nakada, F. Nishimura, M. Ihara, H. Tanaka
    • Organizer
      The 58th Japan Annual Technical Conference on Swerage
    • Related Report
      2021 Annual Research Report
  • [Presentation] 近畿地方の下水処理場での新型コロナウイルスRNA 調査2021

    • Author(s)
      二瓶義明, 趙博, 藤田知功, 田中宏明, 西村文武, 井原賢
    • Organizer
      第56回 日本水環境学会年会講演集
    • Related Report
      2021 Annual Research Report

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

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