SUZUKI Yoshihiro

写真a

Affiliation

Engineering educational research section Department of Civil and Environmental Engineerring Program

Title

Professor

External Link

Degree 【 display / non-display

  • Doctor (Fisheries Science) ( 1994.3   Hokkaido University )

  • Doctor (Engineering) ( 2001.9   University of Miyazaki )

Research Areas 【 display / non-display

  • Environmental Science/Agriculture Science / Environmental load reduction and remediation

  • Environmental Science/Agriculture Science / Environmental dynamic analysis

 

Papers 【 display / non-display

  • Development of softening and ballasted flocculation as a pretreatment process for seawater desalination through a reverse osmosis membrane Reviewed

    Yadai T., Suzuki Y.

    npj Clean Water   7   2023.12

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:npj Clean Water  

    Efficient desalination through a reverse osmosis (RO) membrane requires the prior removal of blockade-causing substances from raw seawater. To achieve ultrahigh-speed processing of a pretreatment process for seawater RO desalination, we combine traditional softening with ballasted flocculation (SBF) for Ca2+ and Mg2+ removal. An alkaline mixture of Ca(OH)2 and Na2CO3 was the most suitable softening agent for Ca2+ and Mg2+ removal with a reduced amount of generated sludge. This softening treatment simultaneously removed the suspended solids and bacteria from actual seawater. The settling velocity of the suspended solids generated via seawater softening was extremely low. Under the optimum conditions for desalinating actual seawater using an anionic polymer flocculant and microsand, the settling velocity exceeded 3.5 cm/s, 833 times higher than that of softening without ballasted flocculation. The amount of sludge after standing for 3 min was 76.5% lower in SBF than in conventional softening. The silt density index of the treated seawater met the water-supply standard of RO membranes (i.e., <3.0). Furthermore, the SBF-generated sludge exhibited considerably improved dewatering property than the sludge obtained via conventional softening. SBF can efficiently and quickly remove the causative substances of RO membrane fouling from seawater, thereby improving the treatability of generated sludge. SBF provides a new pretreatment process for seawater desalination using RO membranes.

    DOI: 10.1038/s41545-023-00226-0

    Scopus

  • Simultaneous detection of various pathogenic Escherichia coli in water by sequencing multiplex PCR amplicons Reviewed

    Suzuki Y., Shimizu H., Tamai S., Hoshiko Y., Maeda T., Nukazawa K., Iguchi A., Masago Y., Ishii S.

    Environmental Monitoring and Assessment   195 ( 2 )   2023.2

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Environmental Monitoring and Assessment  

    Waterborne diseases due to pathogen contamination in water are a serious problem all over the world. Accurate and simultaneous detection of pathogens in water is important to protect public health. In this study, we developed a method to simultaneously detect various pathogenic Escherichia coli by sequencing the amplicons of multiplex PCR. Our newly designed multiplex PCR amplified five genes for pathogenic E. coli (uidA, stx1, stx2, STh gene, and LT gene). Additional two PCR assays (for aggR and eae) were also designed and included in the amplicon sequencing analysis. The same assays were also used for digital PCR (dPCR). Strong positive correlations were observed between the sequence read count and the dPCR results for most of the genes targeted, suggesting that our multiplex PCR-amplicon sequencing approach could provide quantitative information. The method was also successfully applied to monitor the level of pathogenic E. coli in river water and wastewater samples. The approach shown here could be expanded by targeting genes for other pathogens.

    DOI: 10.1007/s10661-022-10863-6

    Scopus

  • Application of Coagulation and Foam Concentration Method to Quantify Waterborne Pathogens in River Water Samples Reviewed International coauthorship

    Suzuki Y., Jikumaru A., Tamai S., Nukazawa K., Masago Y., Ishii S.

    Water (Switzerland)   14 ( 22 )   3642   2022.11

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Water (Switzerland)  

    One of the major challenges in detecting waterborne pathogens is the low concentration of the target bacteria in water. In this study, we applied the coagulation and foam concentration method to obtain DNA from water samples collected from upstream, near an estuary. The DNA samples were analyzed using 16S rRNA gene sequencing to clarify the microbial community shifts and to identify potentially pathogenic bacteria. Bacterial communities changed as the river flowed downstream, most likely influenced by land use and human activities such as the discharge of wastewater-treatment plant effluent. Based on the 16S rRNA gene amplicon sequencing, potentially pathogenic bacteria were detected with greater than 0.1% of their relative abundances. Among these, Yersinia ruckeri and Pseudomonas alcaligenes were widely detected in the river water. In addition, digital PCR (dPCR) was used to quantify major waterborne pathogens. Shiga toxin-producing Escherichia coli (STEC), Shigella spp., and Campylobacter jejuni were all below the limit of detection. In contrast, general E. coli, which has the beta-D-glucuronidase gene (uidA) were detected by dPCR (copies/100 mL) at similar levels to those measured using the culture-based method (as colony forming units/100 mL). These results suggest that the coagulation and foam concentration method is useful for concentrating microbes and obtaining DNA from river water samples for environmental monitoring.

    DOI: 10.3390/w14223642

    Scopus

  • Antibiotic-resistant Escherichia coli isolated from dairy cows and their surrounding environment on a livestock farm practicing prudent antimicrobial use Reviewed

    Suzuki, Y., Hiroki, H., Xie, H., Nishiyama, M., Sakamoto, S.H., Uemura, R., Nukazawa, K., Ogura, Y., Watanabe, T. and Kobayashi, I.

    International Journal of Hygiene and Environmental Health   240   113930   2022.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijheh.2022.113930

  • Tracing sediment transport history using mineralogical fingerprinting in a river basin with dams utilizing sediment sluicing Reviewed

    Ito K., Matsunaga M., Itakiyo T., Oishi H., Nukazawa K., Irie M., Suzuki Y.

    International Journal of Sediment Research   2023

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:International Journal of Sediment Research  

    Sediment causes a serious problem in relation to dam function. A cooperative sediment sluicing operation has been under way since 2017 to prevent sediment from accumulating in dams in the Mimi River, Miyazaki, Japan. To achieve a smooth and stable operation, it is very important to determine the sediment source and a sediment transport system to maintain the dam's function. In the current study, the source and transport of sediment from the Mimi River basin have been analyzed with X-ray diffraction (XRD) to reveal the peaks of mineral species. The sediment samples were collected in the Mimi River basin from the Tsukabaru Dam to the sea in an area including 4 dams and 5 tributaries. In addition, the minerals in samples collected in 2014, before the start of the sediment sluicing operation, and from 2018 to 2020, after the start of the operation, were analyzed. An evaluation of the similarity of the sediment at each sampling point based on the X-ray diffraction peaks of mineral species showed that sediment distributed upstream was transported downstream in the year when the sediment sluicing was done. This result indicates that the sediment sluicing operation at dams ensured the continuity of the sediment distribution in the Mimi River basin. In addition, an investigation done in 2020 showed that sediment particles very similar to those of the upstream tributaries were deposited downstream because of extensive flooding caused by a large typhoon. The management of sediment transport has the greatest importance in a river basin where a dam is to be constructed. It is possible to trace the history of the sediment distribution and movement resulting from the operation of sediment sluicing by using sediment mineral analysis.

    DOI: 10.1016/j.ijsrc.2022.12.002

    Scopus

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Books 【 display / non-display

  • 宮崎県一ツ瀬川における濁水長期化 その原因と産官学民が連携した対策

    鈴木祥広 ( Role: Joint author)

    パブフル  2022.1 

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    Language:Japanese Book type:Scholarly book

  • A Membrane-Free Alternative Method for Concentration of Live Microorganisms by Foam Separation. In Monitoring Artificial Materials and Microbes in Marine Ecosystems: Interactions and Assessment Methods. Takahashi, T. (ed).

    Suzuki, Y.( Role: Sole author)

    Bentham Science Publishers  2019 

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    Responsible for pages:89-99   Language:English Book type:Scholarly book

  • Capther 3 Eel Anguilla japonica—towards zero emission, In Application of recirculating aquaculture systems in Japan, T. Takeuchi Ed.

    Y. Suzuki, T. Maruyama( Role: Contributor)

    Springer Japan  2017.12 

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    Total pages:333   Responsible for pages:57-74   Language:English

  • Chapter 6 Kuruma Shrimp Marsupenaeus japonicus, In Application of recirculating aquaculture systems in Japan, T. Takeuchi Ed.

    Y. Suzuki( Role: Contributor)

    Springer Japan  2017.12 

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    Total pages:333   Responsible for pages:127-144   Language:English

  • New topics in water resouces research and management

    Suzuki, Y., and Maruyama, T.( Role: Joint author)

    Nova Science Publihers  2008.2 

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    Language:English Book type:Scholarly book

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MISC 【 display / non-display

  • 凝集・泡沫濃縮法を利⽤した河川⽔からの病原⼤腸菌の⾼感度検出および単離⼿法の開発

    ⽚渕真⼈, 清⽔宏樹, 糠澤桂, 鈴⽊祥広

    第28回地球環境シンポジウム講演集   11 - 16   2020.9

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    Language:Japanese   Publishing type:Research paper, summary (national, other academic conference)  

  • ⽔環境からの⼤腸菌病原遺伝⼦ 7 種の⼀⻫検出系の確⽴

    清⽔宏樹, 真砂佳史, ⼩椋義俊, 糠澤桂, 鈴⽊祥広

    第28回地球環境シンポジウム講演集   1 - 3   2020.9

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  • 都市下⽔の⽣物処理過程における⽣残⼤腸菌の系統群と薬剤耐性率の変化

    謝暉, ⼩椋義俊, 糠澤桂, 鈴⽊祥広

    第28回地球環境シンポジウム講演集   2020.9

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  • 「日本のひなた」みやざきの水環境 Invited

    鈴木祥広

    水環境学会誌   43 ( 7 )   215   2020.7

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  • 水環境におけるバンコマイシン耐性腸球菌(VRE)の分布とVRE耐性遺伝子の伝播ポテンシャルの評価 Invited Reviewed

    西山正晃, 鈴木祥広

    環境バイオテクノロジー学会誌   20 ( 1 )   63 - 69   2020.7

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

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Presentations 【 display / non-display

  • バラスト凝集沈殿による実河川濁水の超高速処理技術の開発

    高橋克弥, 安中祐子, 仲元寺宣明, 鈴木祥広

    第 57回 日本水環境学会年会(愛媛大学)  2023.3.15 

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    Event date: 2023.3.15 - 2023.3.17

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 活性炭吸着と凝集・泡沫分離を利用した抗菌薬シプロフロキサシンの濃縮回収に関する基礎的検討

    伊東悠介, 鈴木祥広.

    第 57回 日本水環境学会年会(愛媛大学)  2023.3.16 

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    Event date: 2023.3.15 - 2023.3.17

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 河川における大腸菌群の生残性と薬剤耐性との関係性

    加藤優貴, 謝暉, 鈴木祥広

    第 57回 日本水環境学会年会(愛媛大学)  2023.3.15 

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    Event date: 2023.3.15 - 2023.3.17

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 河岸のヨシ等のイネ科植物がビーチの細菌汚染源である可能性に関する調査研究

    杉山航, 西脇亜也, 鈴木祥広

    第 57回 日本水環境学会年会(愛媛大学)  2023.3.16 

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    Event date: 2023.3.15 - 2023.3.17

    Language:Japanese   Presentation type:Oral presentation (general)  

  • 下水処理水中に生残するESBL大腸菌から河川由来の志賀毒素産生性大腸菌への薬剤耐性の伝播

    謝暉, 小椋義俊, 鈴木祥広

    第 57回 日本水環境学会年会(愛媛大学)  2023.3.15 

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    Event date: 2023.3.15 - 2023.3.17

    Language:Japanese   Presentation type:Oral presentation (general)  

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Awards 【 display / non-display

  • 土木学会環境工学研究フォーラム優秀ポスター発表賞

    2018.12   土木学会環境工学研究委員会   自然河川の最上流域における大腸菌と腸球菌の薬剤耐性株の存在実態

    西村恵美, 糠澤桂, 鈴木祥広

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    Award type:Award from Japanese society, conference, symposium, etc. 

  • 第53回環境工学研究フォーラム優秀ポスター発表賞

    2016.12   土木学会環境工学委員会   レクリエーションビーチの砂浜におけるふん便指標細菌の存在実態と細菌叢解析

    寺西康太郎・西山正晃・鈴木祥広

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • 日本水環境学会九州沖縄支部学術賞

    2016.3   日本水環境学会九州沖縄支部   宮崎の水環境における薬剤耐性菌の存在実態に関する調査・研究

    鈴木祥広

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  • 平成27年度宮崎銀行ふるさと振興助成事業助成 学術研究部門

    2016.1   一般財団法人 みやぎん経済研究所  

    鈴木祥広

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    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

  • Environmental Technology/Project Award, Environmental Engineering Forum

    2012.11  

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    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

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Grant-in-Aid for Scientific Research 【 display / non-display

  • 表流水からの簡便・迅速な薬剤耐性病原大腸菌の超高効率濃縮回収とゲノム履歴分析

    Grant number:21H03620  2021.04 - 2025.03

    独立行政法人日本学術振興会  科学研究費助成事業  基盤研究(B)(一般)

    鈴木祥広

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    Authorship:Principal investigator 

  • 泡沫濃縮と次世代シーケンシングを利用した水環境中の病原細菌一斉検出法の開発

    2018.04 - 2021.03

    科学研究費補助金  基盤研究(C)

    鈴木 祥広、真砂 佳史

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    我が国は,水道や下水道などの公衆衛生に係る社会基盤が整備されているにも関わらず,水系感染症の発生事例は後を絶たない
    。感染リスクを大幅に軽減するためには,水道水源や農業・水産用水源,そして,下水処理水放流先となる水環境に存在する病
    原細菌の存否と存在する菌種を網羅的に一斉検出する必要がある。しかしながら,対象とする水試料には多種多様な細菌が極低
    濃度で混在しており,既存の検査法で検出することは極めて困難である。そこで,我々が開発した大容量の水試料からの高効率
    な病原細菌濃縮技術(泡沫分離法)と近年開発が進む次世代シーケンシング技術を組み合わせることによって,①水試料中から
    全ての細菌を超高濃度に濃縮し,②病原関連遺伝子を一斉検出する手法を開発する。

  • 水環境における院内感染原因菌の薬剤耐性獲得・伝達ポテンシャルの評価

    2014.04 - 2017.03

    科学研究費補助金  基盤研究(C)

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    Authorship:Principal investigator 

    本研究では,最重要な院内感染原因菌であり,一方で水環境のふん便汚染指標細菌でもある腸球菌をターゲットとする。都市河川上流から下流・河口に至る流域全体において,各流域から単離・同定した菌株について,重要な6~8種類の抗生物質に対する薬剤耐性試験を実施し,薬剤耐性菌の発現・集積エリアを推定する。その発現・集積エリアの環境を模して人工的環境によるin vitro実験を実施することによって,薬剤耐性の獲得が薬剤投与によるヒト体内のみであるのか,あるいは水環境においても耐性能力を獲得する可能性があるのかについて検討する。さらに,感染学分野で採用されているFilter Mating法を応用し,各条件におけるドナー株(薬剤耐性株)からレシピエント株(非耐性株)への薬剤耐性の伝搬率を測定し,薬剤耐性獲得・伝搬ポテンシャルを評価する。

  • 都市を経由する河川流域における薬剤耐性菌の実態調査とその対策技術の提案

    2011.03 - 2014.03

    科学研究費補助金  基盤研究(C)

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    都市を経由する河川流域における薬剤耐性菌について実態調査を行うとともに,耐性菌の対策技術の提案する。

  • 沿岸都市域におけるふん便性細菌の汚染状況の把握と汚染源追跡手法の開発

    2007.05 - 2011.03

    科学研究費補助金  基盤研究(C)

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    沿岸都市域の「みやざき」と調査フィールドとし,ふん便性細菌の汚染状況の把握するとともに,遺伝子解析法を利用した汚染源追跡手法の開発を目的とする。

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Available Technology 【 display / non-display