Municipal Solid Waste Incineration in Thailand: Bangkok and Beyond

Bangkok generates 13,254 tons of municipal solid waste every single day (Pollution Control Department (Thailand) – Municipal Solid Waste Database) — more than most provincial cities produce in a month. Most of that trash still ends up in landfill, but a small and growing share gets burned for electricity instead. Waste-to-energy (WtE) incineration turns the daily mountain of urban garbage into grid power, and it sits alongside biomass and biogas as part of Thailand’s broader bioenergy sector. This guide covers Bangkok’s operating WtE plants, the projects spreading the model to other provinces, what a plant costs to build, and where Thailand’s 2037 capacity targets stand today.

TL;DR: Thailand runs roughly 328 MW of licensed waste-to-energy capacity across 36 plants, led by Bangkok’s Nong Khaem (9.8 MW) and On Nut (35 MW) facilities (Southeast Asia Infrastructure). The government’s Power Development Plan targets 500 MW nationwide by 2037 — nearly double what’s installed now.

How Much Waste Does Thailand Actually Produce?

Thailand generated 27.76 million tons of municipal solid waste in 2025 (Pollution Control Department (Thailand) – Municipal Solid Waste Database), and Bangkok alone accounted for 13,254 tons of that daily total (Pollution Control Department (Thailand) – Municipal Solid Waste Database). Only about 38% gets recycled or reused (Pollution Control Department (Thailand) – Municipal Solid Waste Database) — the rest heads to landfill, open dumps, or incineration, which is exactly why waste-to-energy capacity matters as much as recycling rates do.

The Bangkok Metropolitan Administration (BMA) collected 9,238 tons of waste per day in fiscal year 2024 (Thai PBS – The Active), a figure that undercounts what the city truly generates. That gap between generation and collection is where landfills quietly keep filling. So why hasn’t recycling closed the gap on its own? Partly because construction debris, food waste, and mixed plastics are harder to sort at scale than a 38% national recycling rate suggests.

Thailand’s Pollution Control Department reports 10.62 million tons recycled out of 27.76 million tons generated nationally in 2025 (Pollution Control Department (Thailand) – Municipal Solid Waste Database)(Pollution Control Department (Thailand) – Municipal Solid Waste Database) — leaving roughly 17 million tons a year that landfills, open dumps, or waste-to-energy plants have to absorb. That remainder is the pool waste-to-energy projects are built to shrink.

For a look at how Thailand handles organic waste on the farm side rather than in cities, see our guide to village biogas.

Which Waste-to-Energy Plants Are Running in Bangkok Right Now?

Bangkok’s Nong Khaem plant has burned municipal waste for grid power since 2016, processing about 500 tons a day into 9.8 MW of electricity (The Star (Malaysia) / Xinhua). The newer On Nut facility handles up to 1,600 tons daily and generates 35 MW (Power Technology (GlobalData))(Thairath English) — together, the two plants show what a city producing 13,000-plus tons of daily waste can recover as usable power instead of landfill volume.

Since 2016, Nong Khaem alone has processed 1.68 million tonnes of waste and generated 636 million kWh of electricity (The Star (Malaysia) / Xinhua). That’s nearly a decade of continuous operation on a single incineration line.

Efficiency pattern: On Nut converts roughly 22 kW of capacity per ton of daily waste throughput, compared with Nong Khaem’s roughly 20 kW per ton — a modest but real gain that likely reflects newer combustion technology, though feedstock calorific value plays a role too.

Bangkok isn’t stopping at two plants. A second large facility, designed to handle 1,600 tons a day, entered trial operation in 2026 (The Star (Malaysia) / Xinhua). If it performs at On Nut’s rate, it could add another substantial chunk of capacity to the city’s grid within a few years.

Curious how this compares to biomass power from agricultural residue? Our breaks down the feedstock differences.

What Waste-to-Energy Projects Exist Outside Bangkok?

Phuket has run a 14 MW waste-to-energy plant since 2012 (Power Technology (GlobalData)), while newer projects add 25 MW in Songkhla and 6 MW at Krabi’s ALCP6 facility (Southeast Asia Infrastructure) — proof that WtE isn’t just a Bangkok solution. It’s a model provinces are replicating as tourism growth and population density strain local landfill capacity.

Outside the capital, Phuket’s decade-old plant has quietly kept running while newer, Asian Development Bank-financed projects came online in the south (Power Technology (GlobalData))(Southeast Asia Infrastructure). Together with Bangkok’s fleet, licensed waste-to-energy capacity nationwide reaches roughly 328 MW across 36 plants (Southeast Asia Infrastructure).

Is 328 MW a lot? Not compared to Thailand’s total generation mix — but for waste diversion specifically, every plant online means one less landfill working overtime. Tourist islands like Phuket face waste pressure that outpaces their population numbers, since visitor volume adds garbage that local infrastructure wasn’t originally sized for.

Provinces considering their own waste-to-energy projects often look first at , since both rely on similar development-bank financing structures.

What Are Thailand’s National Targets for Waste-to-Energy Capacity?

Thailand’s 2024 Power Development Plan sets a combined 312 MW target for new municipal and industrial waste-to-energy capacity (EXRI (Thailand energy consultancy) reporting on Ministry of Energy PDP 2024 public hearing), layered on top of the roughly 328 MW already licensed (Southeast Asia Infrastructure). The government’s stated goal is 500 MW of waste-to-energy capacity nationwide by 2037.

Do the math and something interesting shows up: 328 MW already installed plus 312 MW in the PDP2024 pipeline adds up to roughly 640 MW — well past the stated 500 MW target. That gap likely means either the 500 MW figure is a conservative floor, or a meaningful share of licensed and pipeline capacity won’t reach completion on schedule. Thai infrastructure targets have missed deadlines before.

Waste-to-energy sits inside a bigger bioenergy strategy that also counts biomass and biogas toward Thailand’s renewable generation goals. For the policy mechanics behind that plan, read our .

What Does It Cost to Build a Waste-to-Energy Plant in Thailand?

Waste-to-energy plants typically cost USD 4–10 million per installed megawatt to build (EPC Intel), and Thailand’s feed-in-tariff-style support for WtE power runs USD 155–190 per MWh (International Energy Agency (IEA)). That’s among the higher-cost renewable technologies in the country, which is why financing usually comes through development banks rather than private capital alone.

The Asian Development Bank recently backed that pattern directly, financing 16.6 billion baht (roughly $511.9 million) toward 12 industrial waste-to-energy plants totaling 96 MW, aimed at diverting more than 600,000 tons of waste a year by 2029 (SolarQuarter (reporting ADB financing announcement)).

At $4–10 million per MW (EPC Intel), building the remaining roughly 172 MW needed to hit the 500 MW target would cost somewhere between $688 million and $1.72 billion — squarely in the range the $511.9 million ADB loan already covers for just 96 MW of industrial capacity (SolarQuarter (reporting ADB financing announcement)). That math explains why waste-to-energy expansion leans so heavily on multilateral lenders instead of pure private investment.

Curious what similar development-bank financing looks like for other renewables? Compare it against .

Do Waste-to-Energy Plants Pollute the Air?

Yes. Burning municipal waste releases dioxins and furans, fine particulate matter, heavy metals such as mercury, cadmium and lead, and acid gases like sulphur dioxide and hydrogen chloride. Dioxins are the headline concern: the World Health Organization classifies the most-studied dioxin as a known human carcinogen that persists in the body for 7 to 11 years, and it names uncontrolled solid-waste incinerators as often the worst source of environmental dioxin release.

Thailand does regulate these emissions. A Ministry of Natural Resources and Environment notification published in the Royal Gazette on 28 August 2023 sets binding limits for waste-to-energy plants — a 0.1 ng I-TEQ/Nm³ dioxin cap, with particulate matter tightened from 70 to 50 mg/m³ for new plants and separate ceilings for mercury, cadmium, lead, sulphur dioxide, nitrogen oxides and hydrogen chloride. One caveat worth knowing: that dioxin limit matches the EU’s original 2000 standard, not the stricter level the EU adopted in 2019 — Thailand regulates dioxins, but its ceiling sits at the EU’s 25-year-old floor.

The gap that matters is old-and-uncontrolled versus modern-and-controlled, and flue-gas treatment does most of the work. One peer-reviewed study measured an incinerator emitting 3.6 ng I-TEQ/Nm³ with no controls — about 36 times the Thai limit — then cut it to 0.042 ng after retrofitting activated-carbon injection and a bag filter, a roughly 99% reduction. Thailand’s newer plants are built this way: the twelve ADB- and AIIB-financed industrial waste-to-energy plants use continuous emission monitoring, activated-carbon injection for dioxins and bag filters for dust, and Bangkok’s Nong Khaem plant, running since 2016, is a modern monitored facility. Older or small-scale municipal units, by contrast, historically ran with little or no flue-gas cleaning.

The weaker link in Thailand is monitoring, not the standard on paper. Bangkok’s incinerators are only required to complete a “code of practices” study that does not compel operators to track or publicly report dioxin and heavy-metal emissions, and smaller plants can avoid a full environmental impact assessment altogether. So while the scientific consensus is that modern, well-run waste-to-energy plants do not meaningfully harm public health, that verdict depends on controls actually being fitted and monitored — which is exactly where oversight is thinnest.

Frequently Asked Questions

How many waste-to-energy plants does Thailand have?

Thailand has 36 licensed waste-to-energy plants with a combined 328 MW of capacity as of 2025 (Southeast Asia Infrastructure), including Bangkok’s Nong Khaem and On Nut facilities plus provincial plants in Phuket, Songkhla, and Krabi. The government’s 2037 target of 500 MW would nearly double this fleet within roughly a decade.

How much municipal waste does Bangkok generate each day?

Bangkok generated an estimated 13,254 tons of municipal solid waste per day in 2025 (Pollution Control Department (Thailand) – Municipal Solid Waste Database), while the Bangkok Metropolitan Administration collected 9,238 tons daily in fiscal year 2024 (Thai PBS – The Active). That gap between generation and collection is part of why waste-to-energy capacity still lags actual need.

How much electricity does the Nong Khaem plant generate?

Since opening in 2016, Nong Khaem has processed 1.68 million tonnes of waste and generated 636 million kWh of electricity (The Star (Malaysia) / Xinhua), running at 9.8 MW capacity from roughly 500 tons of daily waste input (The Star (Malaysia) / Xinhua). It remains Bangkok’s longest-running waste-to-energy facility.

What percentage of Thailand’s waste gets recycled instead of incinerated or landfilled?

About 38% of Thailand’s 27.76 million tons of annual municipal solid waste gets recycled or reused (Pollution Control Department (Thailand) – Municipal Solid Waste Database)(Pollution Control Department (Thailand) – Municipal Solid Waste Database), leaving roughly 17 million tons a year for landfill, open dumping, or waste-to-energy incineration — the gap waste-to-energy projects are meant to help close.

The Bottom Line

Thailand’s waste-to-energy sector is still small relative to the country’s total waste stream, but it’s growing on two fronts at once: Bangkok expanding its own fleet, and provinces like Phuket, Songkhla, and Krabi proving the model works outside the capital.

Key takeaways:

• Thailand runs roughly 328 MW of licensed waste-to-energy capacity across 36 plants nationwide (Southeast Asia Infrastructure)
• Bangkok’s Nong Khaem (9.8 MW) and On Nut (35 MW) plants anchor the capital’s fleet, with a second large facility now in trial operation (The Star (Malaysia) / Xinhua)(Power Technology (GlobalData))(The Star (Malaysia) / Xinhua)
• Provincial plants in Phuket (14 MW), Songkhla (25 MW), and Krabi (6 MW) show the model scaling beyond Bangkok (Power Technology (GlobalData))(Southeast Asia Infrastructure)
• The 2037 national target of 500 MW leans on development-bank financing, at $4–10 million per installed MW (EPC Intel)

For a broader look at where waste-to-energy fits among Thailand’s other bioenergy sources, see our .