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Environmental Water Quality Engineering Lab
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A lab that tracks viruses and bacteria in water to deliver safe water.
AboutAbout the lab
Safe water for the world: rethinking society through water quality.
The Environmental Water Quality Engineering Lab researches how to prevent infectious diseases spread through water.
The lab investigates how gastroenteritis viruses such as norovirus move through human society and the water environment.
Through both experiments and data analysis, it clarifies how water and sewage treatment and disinfection act on pathogens.
The lab is also working to understand the actual state of water environment contamination by drug-resistant bacteria, which are not killed by antibiotics.
Key terms
- Gastroenteritis viruses
- Viruses that cause diarrhea and vomiting, such as norovirus and rotavirus
- Selection pressure
- A selective force from the environment that allows only organisms with certain traits to survive
- Drug-resistant bacteria
- Bacteria that antibiotics no longer kill, making the treatment of infectious diseases difficult
NewsLab news
The Assistant Professor received the Doctoral Research Encouragement Award (Organo Award) at the Japan Society on Water Environment Symposium
A review article on infectious disease control and causal inference within the One Health framework was published
A paper on the effect of virus particle aggregation on the efficiency of chlorine disinfection was published
A review article on the transmission of drug resistance genes in the water environment was published
The Associate Professor received the Young Scientists' Award of the FY2026 (Reiwa 8) Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology
ResearchResearch themes
The lab clarifies how pathogens move through human society and the water environment, and considers mechanisms to suppress waterborne infectious diseases. By making fuller use of infrastructure such as water supply and sewage treatment, it aims to create a "waterborne infectious disease control system" that goes beyond the framework of conventional sanitary engineering.
*Illustrative imagePathogens and social infrastructure
The lab studied how gastroenteritis viruses such as norovirus spread in human society and confirmed that chlorine disinfection acts as a selection pressure. It is also considering how to determine the target level to which viruses should be reduced in sewage treatment.
*Illustrative imageDrug-resistant bacteria and the water environment
Contamination of the water environment by drug-resistant bacteria, which are not killed by antibiotics, has not yet been systematically surveyed in Japan. The lab investigates how resistance genes are transmitted in the water environment and how resistant bacteria behave during sewage treatment.
MembersFaculty
The members of the Environmental Water Quality Engineering Lab consist of faculty members, postdoctoral researchers, doctoral, master's, and undergraduate students, and research students.As of 2026
- ProfessorDaisuke Sano
- Associate ProfessorMohan AMARASIRI
- Assistant ProfessorWakana Oishi
- Assistant ProfessorKatayoun AMIRFARD
VoicesStudent voices
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “The coagulation and filtration processes at a drinking water treatment plant. ( )” USEPA Environmental-Protection-Agency / Public domain (cropped)
- Pathogens and social infrastructure: “Norovirus 3D structural rendering - 2111” NIAID / CC BY 2.0 (cropped)
- Drug-resistant bacteria and the water environment: “E. coli bacteria (cropped)” NIAID / CC BY 2.0 (cropped)
- Related lab (Geosphere and Geotechnical Engineering Lab): “Niigata soil liquefaction” 作者不詳 / Public domain (cropped)
- Related lab (Infrastructure Materials Engineering Lab): “Concrete resistance test” Habib M’henni / CC BY-SA 3.0 (cropped)
- Related lab (Environmental Ecosystem Engineering Lab): “Matsushima miyagi z” Chensiyuan / CC BY-SA 4.0 (cropped)
- Related lab (Living Environment Design Lab): “Modern living room with large windows showing view of trees and lake in daylight” Shixart1985 / CC BY 2.0 (cropped)
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