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Environmental Conservation Engineering Lab
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A lab that cleans wastewater with the power of microorganisms and also recovers energy from it.
AboutAbout the lab
Turning wastewater into resources and energy.
The Environmental Conservation Engineering Lab researches technologies that use microorganisms to treat wastewater and waste.
Using anaerobic treatment, which does not use oxygen, the lab removes nitrogen and phosphorus and also recovers methane and hydrogen as energy.
The lab targets wastewater and waste actually produced in practice, such as urban sewage, wastewater from pig farms, and food waste.
Beyond operating reactors, the lab also studies the microorganisms that work inside them.
Key terms
- Anammox
- The activity of microorganisms that convert ammonia into nitrogen gas under oxygen-free conditions
- Anaerobic membrane bioreactor (AnMBR)
- A wastewater treatment system that combines microbial treatment without oxygen with filtration through a membrane
- Anaerobic fermentation
- A reaction in which microorganisms break down organic matter under oxygen-free conditions and produce gases such as methane and hydrogen
NewsLab news
View More ↗ResearchResearch themes
The lab develops technologies that use the activity of microorganisms to remove pollutants from wastewater and organic waste. At the same time, it aims to recover methane, hydrogen, and phosphorus during treatment and circulate them as resources.
*Illustrative imageRemoving nitrogen with anammox
The lab studies a method that combines the anammox reaction, which converts ammonia into nitrogen gas under oxygen-free conditions, with a reaction that recovers phosphorus as crystals, so that nitrogen removal and phosphorus recovery take place at the same time.
*Illustrative imageAnaerobic treatment with membrane separation
In the anaerobic membrane bioreactor (AnMBR), which combines an anaerobic treatment tank with a membrane, the working microorganisms are retained inside the tank. This enhances methane production while also improving the quality of the treated water, and the lab also investigates how to prevent membrane fouling.
*Illustrative imageTreating pig farm wastewater
Pig manure and urine are rich in organic matter and ammonia, and polluting nearby water bodies if discharged untreated. Targeting waste from a pig farm in Zao, the lab studies how to improve the quality of discharged water by adding treatment combined with membranes.
*Illustrative imageHydrogen and methane from food waste
The lab subjects organic waste from cities to anaerobic fermentation and recovers it as gas containing hydrogen and methane. Using a two-phase system that separates an acid-producing tank from a methane-producing tank, it explores conditions for stable operation.
MembersFaculty
The members of the Environmental Conservation Engineering Lab consist of faculty members, researchers, doctoral, master's, and undergraduate students, exchange students, technical assistants, and secretaries.As of 2026
- ProfessorLi Yuyou
- Associate ProfessorKengo Kubota
- Assistant ProfessorQin Qin
- Assistant ProfessorChen Yujie
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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: “Doddabommasandra Lake STP Bengaluru sewage treatment plant aerial view India” Vraj Acharya, WELL Labs / CC BY-SA 4.0 (cropped)
- Removing nitrogen with anammox: “Activated sludge sewage treatment plant aeration tank” Marcos von Sperling / CC BY-SA 4.0 (cropped)
- Anaerobic treatment with membrane separation: “Membrane bioreactor (MBR) ( )” SuSanA Secretariat / CC BY 2.0 (cropped)
- Treating pig farm wastewater: “Pigfarm Kft sertéstelepe - panoramio” Szodorai Imre [Hun] / CC BY 3.0 (cropped)
- Hydrogen and methane from food waste: “MBT anaerobicdigesters” The original uploader was Vortexrealm at English Wikipedia. / CC BY-SA 2.5 (cropped)
- Related lab (Infrastructure Materials Engineering Lab): “Concrete resistance test” Habib M’henni / CC BY-SA 3.0 (cropped)
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