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Water Environment Engineering Lab
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The lab aims to turn sewerage systems into hubs for resources and energy.
AboutAbout the lab
Toward a healthy water environment and sustainable communities
The Water Environment Engineering Lab centers its research on sewerage systems, working toward a healthy water environment and sustainable communities.
Sewers have prevented flooding and protected sanitation and water quality. They are now expected to recover resources and to turn wastewater treatment plants into hubs for communities and energy.
Combining field surveys, experiments, and computer simulation, the lab investigates reaction mechanisms and material balances to establish new water treatment technologies.
The lab advances its work seamlessly from fundamental research to scaled-up practical application.
Key terms
- Anaerobic digestion
- A process in which microorganisms break down organic matter and produce methane gas that can be used as fuel
- Forward osmosis
- A method of separating water by placing a membrane between a concentrated solution and a dilute solution and using the natural tendency of water to move toward the concentrated side
- Advanced oxidation
- A method that uses ultraviolet light, ozone, photocatalysts, and similar means to generate highly oxidizing species that break down contaminants in water
NewsLab news
A paper by a Program-Specific Assistant Professor and colleagues was published in Journal of Environmental Management
A paper by doctoral students and others was published in Journal of Water Process Engineering
A paper by doctoral students and others was published in Bioresource Technology
A paper by doctoral students and others was published in Environmental Technology & Innovation
ResearchResearch themes
The lab places sewerage systems at the center of its education and research, aiming to create a healthy water environment and sustainable communities. It works to uncover unknown phenomena and to establish water treatment technologies based on their underlying principles.
*Illustrative imageFuture sewerage for decarbonization
To turn wastewater treatment plants into energy hubs, the lab is building a system that concentrates organic matter by forward osmosis and converts it into energy through anaerobic digestion.
*Illustrative imageResource circulation linking wastewater treatment and agriculture
Considering the links among water, energy, and food, the lab studies resource circulation systems that connect wastewater treatment facilities in small and mid-sized cities with agriculture. It also examines small-scale anaerobic digestion technology and a system that uses the resulting heat and carbon dioxide in greenhouses.
*Illustrative imageCleaning water with physics and chemistry
Some substances in water raise concerns about odor or health effects even at very low concentrations. The lab studies the optimal design and operation of oxidation treatment using ultraviolet light, ozone, and photocatalysts through both experiments and theory, and is also developing a new advanced oxidation device.
*Illustrative imageClarifying how water becomes polluted
Based on field surveys, the lab investigates how harmful substances released into the environment by human activity are transported, transformed, and concentrated in ecosystems. The findings will help develop methods for appropriately managing river basins.
MembersFaculty
The members of the Water Environment Engineering Lab are faculty, technical specialists, program-specific researchers, and doctoral, master's, and undergraduate students.
- ProfessorTaku Fujiwara
- Associate ProfessorTaira Hidaka
- Assistant ProfessorYohei Nomura
- Program-Specific Assistant ProfessorKohei Kawaguchi
- Program-Specific Assistant ProfessorZhou Xinyi
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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: “ČBu, wastewater treatment plant 05” Czeva / CC BY-SA 4.0 (cropped)
- Future sewerage for decarbonization: “Sewage Sludge Digester Gas Flare Stack” Saud / CC BY-SA 4.0 (cropped)
- Resource circulation linking wastewater treatment and agriculture: “Library of Environmental Images, Office of Research and Development (ORD), September 1996 - Pesticides and Toxics - Land application of sewage sludge - DPLA - 90c9aa0f6907ac6561d89bb86ba7761b” Environmental Protection Agency. 12/2/1970 / Public domain (cropped)
- Cleaning water with physics and chemistry: “Water treatment machine in Botanical Garden (46628)” Syced / CC0 (cropped)
- Clarifying how water becomes polluted: “Polluted Water Reserve, JUNE 2026” EST blueprint / CC BY-SA 4.0 (cropped)
- Related lab (Environmental Quality Prediction Lab (Research Center for Environmental Quality Management)): “EPA GULF BREEZE LABORATORY, CHEMISTRY LAB. THE CHEMIST IS TESTING WATER SAMPLES FOR PESTICIDES - NARA - 546277” William C. Shrout / Public domain (cropped)
- Related lab (Resource and Energy Processes Lab): “Film - The Romance of Iron and Steel (1938) - sheet steel storage” sponsor: ARMCO studio: Tri-State Motion Pictures / Public domain (cropped)
- Related lab (Environmental Risk Engineering Lab): “Soilcontam” Dumelow / CC BY-SA 4.0 (cropped)
- Related lab (Hydrology and Water Resources Lab): “Leh-Manali Highway, Basin, Ladakh, India” Vyacheslav Argenberg / CC BY 4.0 (cropped)
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