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Environmental Quality Risk Management Lab
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The lab assesses the risks posed by polluted water, air, and soil, and develops technologies to reduce them.
AboutAbout the lab
Measuring environmental risks and reducing them
The Environmental Quality Risk Management Lab studies the risks that arise when human activities degrade the quality of water, air, and soil.
The lab investigates the forms in which hazardous substances from cities exist and how they affect living organisms (ecotoxicity).
It also develops sewage treatment technologies that use the action of microorganisms.
The lab values how members working on very different subjects come together as one group, gaining broad knowledge and perspective.
Key terms
- Ecotoxicity
- The harmful effects that chemicals and other substances have on living organisms in the environment, such as fish and small crustaceans
- Benthic organisms
- Organisms that live on or in the mud and sand at the bottom of rivers and seas, such as shellfish, polychaete worms, and small crustaceans
- Membrane bioreactor
- A method that treats sewage with microorganisms and then separates the water from the sludge by filtering it through a membrane with fine pores. Also called MBR
NewsLab news
A researcher received The WET Excellent Presentation Award at WET2026
A paper from the lab received the Japan Society on Water Environment Annual Outstanding Paper Award (Metawater Award)
A lab member received The WET Excellent Presentation Award at WET2024
ResearchResearch themes
The lab examines how hazardous substances generated by urban activities move and how they affect living organisms, and considers how to manage rainy-day wastewater and the water environment. It also develops sewage treatment technologies that use membranes and the action of microorganisms.
*Illustrative imageHazardous Substances Carried by Rain
In cities, substances that accumulate on roads and elsewhere on dry days are washed away with rain. The lab studies the effects of hazardous substances contained in road dust and how they dissolve out, and considers urban stormwater management that controls hazardous substances while preventing flooding.
*Illustrative imageEffects on Bottom-Dwelling Organisms
The lab aims for multifaceted research that combines toxicity tests using benthic organisms, which are rarely used in Japan, elucidation of the behavior of chemicals with analytical instruments, and modeling calculations for applying the findings to real field conditions.
*Illustrative imageEnergy-Saving Sewage Treatment Using Membranes
The lab aims to shift from sewage treatment that consumes large amounts of energy to treatment that produces energy and resources. It is developing the inclined-tube membrane bioreactor (itMBR) as a compact and energy-saving treatment process.
*Illustrative imageSewage Treatment Seen Through Microorganisms
In sewage treatment, it is the microorganisms in the sludge that break down contaminants. The lab seeks to learn in detail which microorganisms carry out specific reactions under which conditions, and explores new methods for directly controlling the treatment process.
MembersFaculty
The Environmental Quality Risk Management Lab consists of faculty, administrative and technical support staff, researchers, visiting researchers, special research students, internship trainees, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorFumiyuki NakajimaPublications ↗
- Associate ProfessorTomohiro TobinoPublications ↗
- LecturerKyoshiro HikiPublications ↗
VoicesStudent voices
Compiled from answers by students who were in the lab. Ratings and reviews reflect individual students' experiences, not the lab's official views.
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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: “oil-puddle” Roger McLassus 1951 / CC BY-SA 3.0 (cropped)
- Hazardous Substances Carried by Rain: “Curb gutter storm drain” Robert Lawton / CC BY-SA 2.5 (cropped)
- Effects on Bottom-Dwelling Organisms: “Magevee karpvähiline (Ostracoda)” Janek Lass / CC BY 4.0 (cropped)
- Energy-Saving Sewage Treatment Using Membranes: “Inside view of membrane bioreactor when the aeration is turned on ( )” SuSanA Secretariat / CC BY 2.0 (cropped)
- Sewage Treatment Seen Through Microorganisms: “Granulos” Mp nico / CC BY-SA 4.0 (cropped)
- Related lab (水環境制御研究室): “Lake Kasumigaura from Kasumigaura City 04” Σ64 / CC BY 4.0 (cropped)
- Related lab (社会生態システム研究室): “Aeration tank activated sludge process STP Bengaluru India” Vraj Acharya, WELL Labs / CC BY-SA 4.0 (cropped)
- Related lab (都市衛生工学研究室): “Kanamachi-water purification plant-Edo river” Mayuno / CC BY-SA 3.0 (cropped)
- Related lab (地域循環共生システム研究室): “Mt karousan 2016” Townphoto / CC BY-SA 4.0 (cropped)
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