Mitsubishi Municipal Solid Waste (MSW) Gasification and Ash Melting System
[ Waste to Energy System ]

With heightened concerns for global warming, environmentally friendly ways to incinerate waste have become of critical.
MHI Group has a proven track record of delivering more than 200 advanced, reliable waste-to-energy (WtE) plants since 1964. In 1998, we developed the Mitsubishi Municipal Solid Waste (MSW) Gasification & Ash Melting System, an advanced WtE system to combat the issue of waste and environment and help build a fully recycling society for future generations. The first commercial plant was built in Kushiro city, Japan in 2006, near the Kushiro Shitsugen National Park, Japan’s largest marsh designated as a Ramsar site. The plant has been operating successfully as the advanced and most environmentally friendly WtE system.

Kushiro MSW Gasification & Ash Melting Plant

Waste treatment capacity 240 t/day (120 t/day × 2 units)
Electric generating capacity 4.6 MW
Waste type Municipal Solid Waste
Dioxins at the stack 0.00011 to 0.0055 ng-TEQ/Nm3
Annual operation more than 280 days


  • The process of gasification and ash melting of the system allows high recyclability compared to conventional incineration systems.
  • The system achieves an extremely high level of control of dioxins emission, not only in the gas emitted but also in the construction material by-products produced from melted ash.
  • Metals (aluminum, iron, and steel) contained in the waste can be recovered and recycled with rather high sales value compared to metals from conventional incineration.
  • Dioxin-free melted ash or molten slag can be used as construction materials such as asphalt for paving roads.

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