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Circular Agricultural Systems Engineering Lab
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A lab that turns biomass such as livestock manure into charcoal, fertilizer, and fuel to make agriculture circular.
AboutAbout the lab
Circulating biomass for sustainable agriculture.
The Circular Agricultural Systems Engineering Lab studies systems for sustainable agricultural production in harmony with the environment.
The lab works on developing technologies that convert waste biomass, such as livestock manure and food waste, into charcoal, fertilizer, and fuel for reuse.
It is also researching growing crops without relying on chemical fertilizers by applying biochar made from biomass to fields.
Key terms
- Biomass
- Renewable resources derived from living organisms, such as crop residues, livestock manure, and wood
- Biochar
- Charcoal made by heating biomass. It is used as a fuel and as a material for improving soil
- PM2.5
- Very small particles suspended in the air, with a diameter of 2.5 micrometers or less. Inhaling them affects health
NewsLab news
A paper has been published in Waste Management Bulletin
A paper has been published in Journal of Cleaner Production
A paper has been published in PLoS ONE
A paper has been published in Journal of Material Cycles and Waste Management
A paper co-authored with the Crop Nutrition Lab has been published in Journal of Soil Science and Plant Nutrition
ResearchResearch themes
Aiming for sustainable agricultural production systems that balance economic viability with environmental conservation, the lab studies material cycles centered on the production and utilization of biomass. It works on crop production with low environmental impact, the manufacture of high-quality organic fertilizer, and the production of bioenergy.
*Illustrative imageEnergy-saving carbonization technology
The lab studies methods for turning biomass with high moisture content, such as livestock manure, into charcoal at much lower temperatures than before, and methods that use self-heating reactions of the raw material to carbonize it. It aims to produce biochar without using fossil fuels.
*Illustrative imageEnvironmentally friendly crop production with biochar
To grow crops without relying on chemical fertilizers, the lab studies systems in which compost and biochar are applied to fields together, so that a sufficient amount of crops can be produced.
*Illustrative imageCleaner solid biofuels
Burning low-quality biomass in inefficient stoves releases air pollutants such as PM2.5. The lab aims to develop the manufacture of solid biofuels that emit little PM2.5 when burned, as well as combustion technologies.
*Illustrative imageComposting and microbial deodorization
The lab investigates the properties of waste and the activity of microorganisms that naturally exist in the environment, and devises ways to advance composting. As a countermeasure against the foul odors produced by composting, it is also elucidating the mechanism of microbial deodorization, in which ammonia is adsorbed.
MembersFaculty
The members of the Circular Agricultural Systems Engineering Lab consist of faculty, technical staff, administrative staff, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorKazunori Iwabuchi
- Associate ProfessorNaoto Shimizu
- Assistant ProfessorTakanori Itoh
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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: “Biochar pile” Oregon Department of Forestry / CC BY 2.0 (cropped)
- Energy-saving carbonization technology: “Steaming pile - geograph.org.uk - 338689” Richard Webb / CC BY-SA 2.0 (cropped)
- Environmentally friendly crop production with biochar: “Charged and inoculated biochar ready for soil application” Tim Brunauer on behalf of Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) / CC BY-SA 4.0 (cropped)
- Cleaner solid biofuels: “Wood pellets-small huddle PNr°0108” D-Kuru / CC BY-SA 3.0 at (cropped)
- Composting and microbial deodorization: “Compost pile” Ksd5 / CC0 (cropped)
- Related lab (生物生産応用工学研究室): “Installation of soil sensors” UBC Micrometeorology from Vancouver, Canada / CC BY 2.0 (cropped)
- Related lab (食品加工工学研究室): “Fresh Vegetables display in Iloilo Terminal Public Market 01” OnlyJanz / CC BY-SA 4.0 (cropped)
- Related lab (生態環境物理学研究室): “Kushiro Marsh, Shibecha” Kzaral / CC BY 2.0 (cropped)
- Related lab (農業土木学研究室): “Rural seanery of Ogata Villaege 20200906” 掬茶 / CC BY-SA 4.0 (cropped)
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