Bangkok’s On Nut waste-to-energy plant starts commercial operations
The facility takes rubbish from 25 Bangkok districts and will sell 30MW of its output to Thailand’s electricity authority.
Bangkok’s On Nut Waste-to-Energy Plant has entered full commercial service, generating 35 megawatts of electricity while treating at least 1,000 tonnes of municipal rubbish each day. Its maximum waste-handling capacity is 1,600 tonnes per day.
Newsky Energy (Bangkok) Co Ltd operates the plant through a 20-year concession granted by the Bangkok Metropolitan Administration. The Electricity Generating Authority of Thailand (EGAT) will buy 30MW, while the remaining electricity will supply the facility’s own operations.
Newsky Energy (Bangkok) chief executive He Ning said the capital generates around 10,000 tonnes of rubbish daily and described waste management as a major challenge. The plant burns waste in enclosed stoker-type incinerators at 850–1,100°C, supplying energy to high-pressure steam turbines.
Environmental controls include an enclosed waste pit under negative pressure and an AI-powered Electronic Nose (E-nose) system that monitors volatile organic compounds. Emissions are continuously monitored at the 80-metre chimney, with readings displayed publicly. The facility also has noise barriers and a zero-discharge wastewater recycling system.
Combustion accounts for roughly 85% of the waste processed, leaving 15% as non-combustible heavy ash. That residue is checked for hazardous substances before being sent to a Chon Buri landfill. Company officials plan to develop ways to turn heavy ash into paving bricks. Activated carbon filters capture fly ash for disposal by licensed operators.
