en.Wedoany.com Reported - Mitsubishi Heavy Industries Environmental & Chemical Engineering Co., Ltd. (MHIEC) has completed the reconstruction of the East Waste-to-Energy Plant in Nagasaki City's Toishi-machi, which began full-scale operations on June 16. The reconstruction was necessitated by the aging of the original facility and was carried out under a DBO (Design, Build, Operate) contract signed with Nagasaki City in 2022, which also includes a 20-year operation and maintenance service provided by a special purpose company (SPC).
The SPC, named Nagasaki Higashi Eco-Creation Co., Ltd., was jointly established by MHIEC and Jukan Operation Co., Ltd. (President: Fujiwara Tatsusaburo; Headquarters: Nagasaki City, Kozen-machi), a Mitsubishi Heavy Industries Group company. The plant is equipped with two stoker-type incinerators, each with a processing capacity of 105 tons per day, for a total capacity of 210 tons per day. Through steam turbine power generation equipment, the plant achieves a power generation capacity of 4,940 kW. The thermal energy generated during waste processing is used for efficient power generation and supplies high-temperature hot water to the nearby Nagasaki East Park community facilities. By maximizing energy utilization, the plant will contribute to Nagasaki City's goal of becoming a "Zero Carbon City."
MHIEC took over Mitsubishi Heavy Industries' waste treatment plant business in 2008, inheriting environmental system technology development capabilities and the expertise accumulated by Mitsubishi Heavy Industries over many years in the construction and operation of waste treatment facilities in Japan and overseas. The company stated that it will continue to propose lifecycle cost solutions, such as extending the lifespan of existing waste treatment facilities, addressing global warming, and reducing maintenance management costs, based on its track record, contributing to energy decarbonization through waste energy recovery.
Note: Under a DBO contract, local governments or other public entities are responsible for raising funds and entrust the design, construction, and operation of the facility to a private company while retaining ownership. MHIEC holds an 85% stake in the SPC, with JKO holding the remaining 15%. Stoker-type incinerators mix waste by injecting air from below the heat-resistant grate to achieve efficient incineration, making them the most commonly used treatment system for municipal solid waste.
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