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Engineering educational research section Civil and Environmental Engineering Program |
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SUZUKI Yoshihiro
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Degree 【 display / non-display 】
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Doctor (Fisheries Science) ( 1994.3 Hokkaido University )
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Doctor (Engineering) ( 2001.9 University of Miyazaki )
Research Interests 【 display / non-display 】
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Water Environment
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environmental health
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Water treatment technology
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Environment
Research Areas 【 display / non-display 】
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Environmental Science/Agriculture Science / Environmental load reduction and remediation
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Environmental Science/Agriculture Science / Environmental dynamic analysis
Education 【 display / non-display 】
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Hokkaido University Graduate School, Division of Fisheries
1991.4 - 1994.3
Country：Japan
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Hokkaido University Faculty of Fisheries
- 1989.3
Country：Japan
Campus Career 【 display / non-display 】
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University of Miyazaki Engineering educational research section Department of Engineering Department of Civil and Environmental Engineerring Program Professor
2021.04 - 2025.03
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University of Miyazaki Engineering educational research section Department of Civil and Environmental Engineering Professor
2013.07 - 2021.03
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University of Miyazaki Faculty of Engineering Civil and Environmental Engineering Environmental control course Associate Professor
2007.04 - 2013.06
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University of Miyazaki Faculty of Engineering Civil and Environmental Engineering Environmental control course Associate Professor (as old post name)
2006.05 - 2007.03
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University of Miyazaki Faculty of Engineering Civil and Environmental Engineering Environmental control course Research Assistant
1994.07 - 2006.04
External Career 【 display / non-display 】
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財団法人水産科学研究奨励会 研究員
1994.4 - 1994.6
Professional Memberships 【 display / non-display 】
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Japan Society on Water Environment
1995.4
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Japan Society of Civil Engineers
1995.4
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The Society for Biotechnology, Japan
2007.7
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環境技術学会
2015.7
Papers 【 display / non-display 】
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Iriguchi S., Matsuyama R., Okuno M., Tamai S., Ito Y., Takemoto S., Ogura Y., Suzuki Y.
Environmental Pollution 399 2026.6
Authorship：Last author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Environmental Pollution
Escherichia coli is used as an indicator of fecal contamination in river water, yet its geographic variation associated with land use and virulence potential of these strains remain insufficiently characterized. In particular, Shiga toxin (Stx)-producing E. coli (STEC) represents a highly virulent subset capable of causing severe human diseases, while its quantification and virulence assessment are hindered by low abundance in river water. Fixed-point sampling at 10 stations in the Oyodo River, Japan, revealed E. coli counts reaching up to 1.70 × 104 CFU/100 mL and correlating positively with water quality parameters. The counts spiked in residential areas lacking sewer systems and adjacent livestock farms. Four stations where segments characteristics changed were investigated for STEC using the foam concentration method. STEC strains were detected at all locations, with a maximum of 3.98 cells/100 mL, and 13 isolates were recovered, with higher levels downstream of unsewered residences and livestock farms. Given the low infectious dose of STEC, this concentration indicates potential human infection risk. Whole-genome sequencing (WGS) revealed that three isolates (O103:H2 or O111:H8) harbored stx1a and/or stx2a with eae, a combination linked to severe human infections. Ten isolates, including the two stx2a- and eae-positive strains, exhibited multidrug resistance genotypically and phenotypically. WGS of 219 non-STEC E. coli strains isolated across sampling periods revealed consistent shifts in phylogenetic diversity and antimicrobial resistance gene profiles after the river passed through unsewered residences and livestock farms, suggesting persistent contamination. Overall, combining efficient concentration strategies with genome-based analyses enables robust evaluation of STEC occurrence, virulence, and contamination sources in human-impacted river environments.
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Comparison of antimicrobial-resistant E. coli and other coliforms from the upstream to estuary sections in three rivers with different basin characteristics Reviewed
Suzuki, Y., Kato, Y., Funaguma, R., Kashima, R., Nakamura, R., Nishimura, E. and Tamai, S.
Journal of Water and Health 23 ( 11 ) 1397 - 1414 2025.11
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal)
DOI： 10.2166/wh.2025.128
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Suzuki Y., Takahashi K., Kondo R., Tamai S., Annaka Y., Chuganji N., Tanaka H.
Journal of Water Process Engineering 77 108380 2025.9
Authorship：Lead author, Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Journal of Water Process Engineering
Algal blooms in reservoirs can cause odor problems in tap water even after going through the coagulation–sedimentation process in water treatment plants. A common countermeasure is to introduce powdered activated carbon (PAC) in the coagulation–sedimentation process, but a long contact time is needed to ensure that odorous substances are adsorbed. In this study, PAC adsorption was combined with ballasted flocculation to realize the fast and simultaneous removal of suspended solids and odorous substances. Experiments were conducted using simulated raw water to determine the appropriate conditions for the proposed method and to compare the performance with that of conventional coagulation. The results showed that PAC adsorption and ballasted flocculation effectively reduced the concentrations of the representative odorous substances geosmin and 2-methylisoborneol to less than 1 ng/L and the turbidity to less than 1 TU (equivalent to 1 mg/L kaolin). Furthermore, the settling velocity of the ballasted flocculation was 22 times higher than that of the conventional coagulation. Thus, the proposed method can quickly and effectively remove suspended solids and odorous substances simultaneously. It is expected to be suitable for water treatment plants with limited space for retrofitting.
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Spatial distribution and loads of nutrients in the Hitotsuse Dam reservoir, Japan Reviewed
Nukazawa K., Fujii N., Miura N., Suzuki Y.
Inland Waters 16 ( 1 ) 2578945 2026.3
Authorship：Last author Publishing type：Research paper (scientific journal) Publisher：Inland Waters
Eutrophication and harmful algal blooms (HABs) are triggered by complex and intrinsic factors in lakes, reservoirs, and watersheds. Therefore, to better understand their mechanisms, the comprehensive monitoring of lakes/reservoirs and inflowing rivers is a primary challenge. We investigated the spatial trends of water quality components related to algal blooms, such as nitrogen (N) and chlorophyll a, in the Hitotsuse Dam reservoir in southwest Japan and inferred their input or output loads in the reservoir. The water quality components (N, phosphorus [P], and chlorophyll a) were measured at 142 sites in the reservoir and inflowing rivers once a year from 2018 to 2020. Additionally, nonlinear regression models were developed to determine the balance of N and P loads in the reservoir. Around the aquaculture rafts in the reservoir, higher concentrations of nitrate-N and total N (TN) were observed, suggesting that the water quality of the reservoir surface water was affected by aquaculture. The TN and TP loads in the effluent were almost equivalent to the total loads of the dam reservoir, which comprised the inflow, aquaculture, and substrate loads. The study demonstrated that evaluating the water quality patterns is useful for identifying the causes of HABs and determining areas where such algal blooms tend to emerge.
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Sin P.P.S., Yadai T., Yamamura H., Suzuki Y., Ota Y., Nishioka K.
Applied Sciences Switzerland 16 ( 5 ) 2622 2026.3
Language：English Publishing type：Research paper (scientific journal) Publisher：Applied Sciences Switzerland
Hydrogen production via water electrolysis using desalinated seawater offers a sustainable energy solution and has attracted considerable attention in recent years. However, its efficiency depends heavily on the quality of water. Many studies have not explored the relationship between treated water quality and hydrogen generation efficiency at each stage of the seawater desalination process. This study examines a three-step seawater desalination process comprising softening with ballasted flocculation (SBF) as a pretreatment, reverse osmosis (RO) as the main desalination step, and ion exchange as a polishing step to provide high-quality water for electrolysis. Water from each purification stage was supplied to the electrolyzer to compare the impact on water quality and hydrogen generation efficiency. The SBF process removed magnesium (Mg) and calcium (Ca) from seawater, as well as turbidity and bacteria, but hydrogen production via water electrolysis continued for no more than 10 h. However, when feeding RO water and RO water processed by ion exchange after the SBF process, hydrogen was generated stably and continuously for 70 h, achieving high efficiency comparable to that of commercial pure water. High production of green hydrogen by water electrolysis is possible through RO seawater desalination combined with SBF pretreatment.
DOI： 10.3390/app16052622
Books 【 display / non-display 】
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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
Language：Japanese Book type：Scholarly book
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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
Responsible for pages：89-99 Language：English Book type：Scholarly book
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Y. Suzuki, T. Maruyama（ Role： Contributor）
Springer Japan 2017.12
Total pages：333 Responsible for pages：57-74 Language：English
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Y. Suzuki（ Role： Contributor）
Springer Japan 2017.12
Total pages：333 Responsible for pages：127-144 Language：English
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New topics in water resouces research and management
Suzuki, Y., and Maruyama, T.（ Role： Joint author）
Nova Science Publihers 2008.2
Language：English Book type：Scholarly book
MISC 【 display / non-display 】
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環境技術思想「陸域と海の境目から着想した研究テーマ」 Invited
鈴木祥広
月刊下水道 8 56 - 61 2023.8
Authorship：Lead author, Corresponding author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
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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
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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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
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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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
Language：Japanese Publishing type：Research paper, summary (national, other academic conference)
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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
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (scientific journal)
Presentations 【 display / non-display 】
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海水飛沫から検出される病原細菌の菌種と界面化学特性
船隈亮太，鈴木祥広
第60回日本水環境学会年会 2026.3.9
Event date： 2026.3.8 - 2026.3.10
Language：Japanese Presentation type：Oral presentation (general)
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薬剤耐性プラスミドの導入による環境分離大腸菌の形質転換能の評価
玉井荘一郎, 鈴木祥広
第60回日本水環境学会年会 2026.3.9
Event date： 2026.3.8 - 2026.3.10
Language：Japanese Presentation type：Oral presentation (general)
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活性炭吸着・バラスト凝集沈殿による水道原水からのPFASの除去技術の開発
吉田陽花, 近藤廉, 松岡秀美, 安中祐子, 鈴木祥広
2025年度日本水環境学会九州沖縄支部研究発表会概要集 2026.2.28
Event date： 2026.2.28
Language：Japanese Presentation type：Oral presentation (general)
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下水処理場における薬剤耐性菌の消長と放流域への拡散
鹿嶋里夏子, 古川隼士, 清和成, 鈴木祥広
2025年度日本水環境学会九州沖縄支部研究発表会概要集 2026.2.28
Event date： 2026.2.28
Language：Japanese Presentation type：Oral presentation (general)
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下水からのがん腫瘍マーカーの検出・定量法の開発
立花璃久, 玉井荘一郎, 鈴木祥広
2025年度日本水環境学会九州沖縄支部研究発表会概要集 2026.2.28
Event date： 2026.2.28
Language：Japanese Presentation type：Oral presentation (general)
Awards 【 display / non-display 】
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2023年度 日本水環境学会学術賞
2024.6 公益社団法人日本水環境学会 水環境における病原微生物の拡散と衛生環境の保全に関する研究
鈴木祥広
Award type：Award from Japanese society, conference, symposium, etc.
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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
Award type：Award from Japanese society, conference, symposium, etc.
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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
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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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
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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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
Award type：Award from publisher, newspaper, foundation, etc. Country：Japan
Grant-in-Aid for Scientific Research 【 display / non-display 】
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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 科学研究費補助金 基盤研究(B)
鈴木祥広
Authorship：Principal investigator
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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
Grant number：26340085 2014.04 - 2017.03
科学研究費補助金 基盤研究(C)
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。
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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
Grant number：23510101 2011.03 - 2014.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator
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。
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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
Grant number：19510089 2007.05 - 2011.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator
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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沿岸都市域におけるエストロゲンの環境動態の追跡と削減技術の開発に関する研究
Grant number：16510062 2004.04 - 2007.03
科学研究費補助金 基盤研究(C)
本研究では，沿岸都市域を研究対象とし，エストロゲンの河口・沿岸域における環境動態の追跡，ならびに新規のエストロゲン除去プロセスの開発について同時並行的に実施する。
（１）エストロゲンの河口・沿岸域における環境動態の追跡
沿岸都市域におけるエストロゲンの環境動態を追跡し，放流水量からエストロゲンの消長を定量的に明らかにする。
（２）エストロゲン除去プロセスの開発
下水高度処理プロセスを想定し，エストロゲン除去プロセスとしての物理化学的処理法と生物学的処理法について比較検討し，効率的な新規のプロセス導入を提案する。
Available Technology 【 display / non-display 】
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水環境における病原性微生物のフィールド調査とラボ研究
森林～河川～海に至る流域の水質保全・修復技術
泡沫濃縮法による微生物の超高感度検出・同定・定量の開発Home Page： 水環境研究室
Related fields where technical consultation is available：・上水、下水、河川水、湖沼・ダム、海水等などの水環境の水質分析・評価
・水質浄化プロセス・システムの機能評価
・農業用水・水産用水等の水の安全診断Message：小さな研究室ですが、学内外のたくさんの研究室と連携・協力し合い、メジャーな研究領域の“境目”“水ぎわ”にテーマの焦点をしぼって、非主流の先端的・特異的研究を進めています。
Committee Memberships 【 display / non-display 】
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日本水環境学会 日本水環境学会九州支部評議員
2003.4
Committee type：学協会
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土木学会 土木学会環境工学委員会 下水道資源の利活用を推進するための 調査検討小委員会委員
2016.4 - 2018.3
Committee type：学協会
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土木学会 土木学会環境工学委員会 今後の水環境保全に貢献する下水道システムの技術的課題と管理手法小委員会委員
2013.6 - 2015.3
Committee type：学協会
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日本水環境学会 レフリー
2012.4 - 2013.3
Committee type：学協会
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土木学会 土木学会環境工学委員会 今後の水環境保全に貢献する下水道システムの技術的課題と管理手法小委員会委員
2012.4 - 2013.3
Committee type：学協会
Social Activities 【 display / non-display 】
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MIYAZAKI UX 次世代を担うデジタル人材育成シンポジウム
Role(s)： Appearance
2024.3.13
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ＭＲＴサンデーラジオ大学
Role(s)： Appearance
2024.1.28
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みやざきDX推進フォーラム
Role(s)： Appearance
2024.1.18
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「高等教育コンソーシアム宮崎」設立記念シンポジウム
2023.11.23
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宮崎経済同友会 社会・教育委員会講演
Role(s)： Lecturer
2023.7.24