The city government of Hiroshima in Japan has awarded a contract to Mitsubishi Heavy Industries Environmental & Chemical Engineering (MHIEC) for refurbishing the combustion facilities at the Naka Waste to Energy Plant.

Upon completion of the refurbishment, the plant will treat municipal solid waste (MSW) in Minamiyoshijima, Naka-ku, and Hiroshima. It will have the capacity to treat 600 tonnes per day.

As part of the $54.9m (JPY5.84bn) contract, MHIEC will enhance the life of the facility by overhauling and improving stoker type incinerators and associated equipment.

The facility was designed and constructed by Mitsubishi Heavy Industries (MHI) in 2004 and has a capacity to generate 15.2MW of electricity to power the equipment in the factory.

Scheduled to be completed in March 2023, the refurbishment project will see the renewal of superannuated core components at the facility.

As part of the agreement, MHIEC will renew the receiving and feeding equipment, exhaust gas cooling equipment, combustion facilities, ventilation systems, ash extractors, and instrumentation.

Additionally, the company will deploy its new incineration control system to support stable incineration, as well as install motors and inverters to increase the energy efficiency of the facility. The refurbishment of the facility is expected to reduce carbon emissions by 9.6% annually.

By refurbishing the facility, the government aims to extend the life of the waste to energy facility and minimise the environmental impact. The Japanese government established a related subsidy system to accelerate this trend in 2010.