MHIEC Signs Contract to Supply Key Equipment for Waste to Energy Plant in Taichung City, Taiwan

Tokyo, December 24, 2025 - Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. (MHIEC), a part of the Mitsubishi Heavy Industries Group, has signed a contract to supply key equipment for the BOT (Build-Operate-Transfer) project of the Taichung Wenshan Waste-to-Energy (WtE) Plant in Taichung City, Taiwan.

The existing Taichung Wenshan WtE Plant, located in central Taiwan's Taichung City, has been in operation since 1995. Due to aging infrastructure, the Taichung City Government is planning to construct and operate a new plant through a BOT scheme. MHIEC concluded a contract on December 19th with the Special Purpose Company (SPC) awarded this BOT project by the Taichung City Environmental Protection Bureau to supply major equipment including the incinerator units. Through this contract, MHIEC will contribute to the stable operation of the plant.

The SPC was established as a joint venture between Onyx Ta-Ho Environmental Services Co., Ltd., Taiwan's largest waste management company, and TCC Chemical Corporation, a subsidiary of TCC Group Holdings Co., Ltd., Taiwan's largest cement company. The term of the BOT project is expected to be 30 years.

MHIEC will deliver its state-of-the-art proprietary V-type stoker waste incinerator (hereafter, "V-type stoker furnace"(Note)), which achieves high environmental performance and realizes the highest power generation efficiency among waste incineration power generation facilities in Taiwan.

MHIEC has a proven track record of delivering seven WtE facilities in Taiwan. Moving forward, MHIEC will further promote the expansion of the V-type stoker furnace and enhance after-sales service, contributing to the stabilization of waste treatment and the realization of a carbon-neutral society in Taiwan.

• A stoker furnace is a mainstream type of municipal waste incinerator where air is blown from beneath a grate made of heat-resistant metal bars, pushing the waste on top forward while burning it. The V-type stoker furnace optimizes the grate structure and furnace shape so that the grate surface faces the flame center during drying, combustion, and post-combustion stages, allowing efficient radiant heat transfer for incineration. This design enables stable incineration and volume reduction of heterogeneous waste, reducing the amount of unburned residue (char) in the ash, thereby lowering environmental impact.

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