Bioenergy in Thailand: Complete Guide 2026

Bioenergy is Thailand’s largest low-carbon electricity source — larger than solar, wind, and hydropower combined. The country generates approximately 29.65 TWh from biomass, biogas, and waste-to-energy plants, accounting for about 6% of total electricity (Low Carbon Power / Ember, 2024). That’s not an accident. Thailand produces roughly 60 million tonnes of agricultural residues every year — sugarcane bagasse, rice husks, palm oil waste, cassava pulp — and burning or digesting it for energy solves two problems at once: waste disposal and power generation.

This guide covers every major branch of bioenergy in Thailand: biomass combustion, biogas from anaerobic digestion, waste-to-energy incineration, and liquid biofuels including ethanol and biodiesel. You’ll find current capacity numbers, AEDP 2037 targets, FiT rates, BOI incentives, and where the real investment is flowing. Whether you’re a developer evaluating projects, a business owner looking at waste-to-energy, or simply want to understand Thailand’s energy mix, this is the full picture.

TL;DR: Thailand has 4,554 MW of bioenergy capacity — 3,851 MW biomass, 653 MW biogas, and ~50 MW waste-to-energy — generating 6% of electricity from agricultural waste and organic matter (Low Carbon Power / Ember, 2024). Biomass is 66% of the way to its 2037 target, but waste-to-energy is only at 6%. The biggest growth areas are WtE plants and sustainable aviation fuel from surplus ethanol.

What Is Bioenergy?

Bioenergy is energy derived from organic matter — anything that was recently alive or produced by living organisms. In Thailand’s context, that means agricultural crop residues, animal manure, food processing waste, municipal garbage, and purpose-grown energy crops (DEDE Biomass Database, 2024).

There are four main conversion pathways:

• Direct combustion — Burning biomass (bagasse, rice husk, wood chips) in a boiler to produce steam that drives a turbine. This is how most of Thailand’s 3,851 MW of biomass capacity works.
• Anaerobic digestion — Bacteria break down organic waste (manure, wastewater, food waste) in sealed tanks to produce methane-rich biogas. Thailand has 653 MW of biogas capacity.
• Thermal waste-to-energy — Municipal solid waste is incinerated at high temperatures to generate electricity. Still small in Thailand (~50 MW operational) but growing fast.
• Biofuel production — Fermenting sugarcane or cassava into ethanol, or processing palm oil into biodiesel. These replace fossil fuels in transport, not electricity.

One common misconception: bioenergy isn’t just “burning wood.” In Thailand, the dominant feedstock is sugarcane bagasse — the fibrous material left after juice extraction. Sugar mills generate their own electricity from it and sell the surplus to the grid. It’s industrial waste recycling, not deforestation.

Why Does Bioenergy Matter for Thailand?

Thailand produces approximately 60 million tonnes of agricultural residues annually — sugarcane bagasse, rice husks, palm oil mill effluent, rubber wood waste, cassava rhizomes, and corn cobs (DEDE Biomass Database, 2024). Most of this material would otherwise be burned in open fields (causing the annual haze crisis) or left to decompose in waterways.

Converting it to energy solves multiple problems simultaneously. Farmers earn income from what was previously waste. Sugar mills become energy self-sufficient and sell surplus power. Pig and chicken farms turn an environmental liability — manure lagoons — into biogas that generates electricity and earns carbon credits.

The government’s AEDP 2024 plan targets a combined 7,980 MW of bioenergy by 2037: biomass at 5,790 MW, biogas at ~1,290 MW, and waste-to-energy at 900 MW (DEDE APEC Presentation, 2024). But progress is uneven. Biomass is already 66% of the way there. Biogas sits at 51%. Waste-to-energy? Just 6%.

Thailand also leads ASEAN in operational biomass capacity at approximately 4 GW, ahead of Indonesia (~3 GW) and Vietnam (ASEAN Biomass Energy Strategy, 2022). That’s a competitive advantage built on decades of sugar and palm oil industry development — infrastructure that other Southeast Asian countries are still building.

How Does Biomass Power Work in Thailand?

Thailand’s biomass power sector runs on agricultural waste. The country’s 3,851 MW of installed biomass capacity makes it the backbone of Thai bioenergy — producing more than five times the output of biogas and waste-to-energy combined (Low Carbon Power / Ember, 2024).

The dominant feedstocks, in order of contribution:

• Sugarcane bagasse — The fibrous residue after juice extraction. Thailand crushes over 100 million tonnes of sugarcane annually, and the 56 sugar mills across the country generate their own electricity from bagasse. Surplus power goes to the grid.
• Rice husk — The outer shell removed during milling. Thailand produces ~20 million tonnes of paddy rice per year, generating roughly 4 million tonnes of husk. Dedicated rice husk power plants operate in the central plains and northeastern provinces.
• Rubber wood — Southern Thailand’s rubber plantations produce wood waste when trees are replanted (every 25-30 years). This feeds biomass plants in Surat Thani, Nakhon Si Thammarat, and Krabi.
• Palm oil residues — Empty fruit bunches, fiber, and shell from palm oil mills. Concentrated in the south.
• Corn cobs and cassava rhizomes — Secondary feedstocks from the northeast and central regions.

How the economics work

The ERC’s FiT ceiling rate for biomass power ranges from approximately 4.2 to 5.3 THB/kWh under 20-year power purchase agreements (Watson Farley & Williams, 2022). For sugar mills, this is nearly pure profit — bagasse is a waste product with zero feedstock cost. For dedicated biomass plants buying rice husk or wood chips, feedstock costs run 800-1,200 THB/tonne, making margins tighter.

The BOI classifies biomass power under Category A2: 8-year corporate income tax exemption with a cap on the total exemption amount (Lex Nova Partners, 2025). Import duty exemptions on machinery and equipment apply.

Here’s what’s easy to miss about Thai biomass: the sector is already near its ceiling. At 3,851 MW installed versus a 5,790 MW target, biomass needs to add only ~1,940 MW over the next 11 years. That’s modest growth — about 175 MW per year. The real expansion opportunity isn’t in biomass. It’s in waste-to-energy, where 850 MW of new capacity is needed from a standing start of ~50 MW.

What Is Biogas and Who Uses It?

Thailand’s biogas sector has reached 653 MW of installed capacity through anaerobic digestion — bacteria breaking down organic waste in sealed tanks to produce methane-rich gas that fuels generators (Statista / DEDE, 2023). It’s less glamorous than solar panels, but it turns some of Thailand’s worst pollution sources into power plants.

Major feedstocks and applications

Cassava starch factories are the largest biogas producers. Thailand is the world’s largest cassava exporter, and starch processing generates enormous volumes of high-strength wastewater. Anaerobic digestion treats the water and captures methane that would otherwise escape as a potent greenhouse gas.

Palm oil mill effluent (POME) — Southern Thailand’s palm oil mills produce a dark, organic-rich wastewater that’s historically been held in open lagoons. Those lagoons released methane directly into the atmosphere. Covered lagoon digesters now capture that methane for electricity generation.

Livestock farms — Large pig and chicken operations in Nakhon Ratchasima, Chiang Mai, and Ratchaburi provinces use manure digesters. Smaller farms benefit from DEDE’s community biogas programs.

Industrial food processing — Breweries, slaughterhouses, and seafood processors use biogas systems to treat wastewater and offset energy costs.

FiT rates and incentives

The ERC sets a FiT ceiling of 2.0724 THB/kWh for biogas from wastewater and waste, with 20-year contracts (Watson Farley & Williams, 2022). Projects in the three southern border provinces (Yala, Pattani, Narathiwat) receive an additional 0.50 THB/kWh premium — a security-zone incentive to encourage investment in the restive deep south.

The BOI classifies biogas under Category A2, same as biomass: 8-year CIT exemption with cap, plus import duty exemptions (Lex Nova Partners, 2025).

At 653 MW installed versus a ~1,290 MW target for 2037, biogas needs to roughly double — about 58 MW of new capacity per year. That’s achievable given the feedstock availability, but it depends on continued FiT support and factory-level investment decisions.

How Is Waste-to-Energy Growing?

Waste-to-energy (WtE) is the biggest gap — and the biggest opportunity — in Thailand’s bioenergy portfolio. Current operational capacity sits at roughly 50 MW, against an AEDP 2037 target of 900 MW (DEDE APEC Presentation, 2024). That’s just 6% of the way there, compared to 66% for biomass and 51% for biogas.

But a construction wave is underway.

Major projects in the pipeline

Gulf Energy is developing 13 waste-to-energy projects — 10 industrial WtE plants and 3 solid recovered fuel (SRF) facilities — with a combined contracted capacity of 96 MW. Total investment: THB 17.6 billion, with 20-year PPAs signed with PEA. Commercial operation dates span 2025-2026 (Kaohoon International, Oct 2023).

Bangkok’s On Nut WtE plant will process 1,000 tonnes of municipal waste per day and generate 35 MW of electricity. The THB 4.89 billion facility targets completion in November 2026 (Thai News, 2024). This is significant because Bangkok generates about 10,000 tonnes of waste daily — one plant won’t solve the problem, but it sets a precedent.

Why the government is pushing WtE hardest

The BOI gives waste-to-energy its highest incentive tier: Category A1 — 8-year corporate income tax exemption with no cap on the exemption amount (Lex Nova Partners, 2025). Compare that to biomass and biogas at Category A2 (capped exemption). The message is clear: the government wants WtE investment more than any other bioenergy type.

The FiT ceiling for WtE is also the most generous in bioenergy: approximately 5.0-6.3 THB/kWh, compared to 4.2-5.3 for biomass and 2.07 for biogas (Watson Farley & Williams, 2022).

Why is WtE so far behind? It’s not technology or money — it’s permitting and public opposition. Thai communities resist WtE incinerators near residential areas due to air quality concerns. The On Nut plant went through years of community consultation. Gulf Energy’s 13 projects are industrial-zone sited specifically to avoid this friction. The 900 MW target is technically achievable, but siting will remain the bottleneck.

What Role Do Biofuels Play?

Thailand’s biofuel sector operates separately from the electricity system — it’s about replacing fossil fuels in transport, not generating power. The country has 28 ethanol plants with a combined capacity of 6.92 million liters per day (MLPD), but road consumption is only 3.43 MLPD — a surplus of over 50% (USDA FAS / DEDE, 2024).

Current fuel mandates

Thailand’s biofuel mandates have been shifting:

• B5 biodiesel — The standard diesel blend since November 2024, reduced from B7 (and before that, B10 which was discontinued in May 2024)
• E20 gasohol — Now the standard gasoline blend, containing 20% ethanol
• E85 — Available at select stations for flex-fuel vehicles, though demand remains limited

The blend reductions reflect global palm oil price volatility and a strategic pivot. Rather than increasing road-transport blending mandates, the government is redirecting surplus ethanol toward aviation fuel.

The SAF pivot

Thailand mandated a 1% sustainable aviation fuel (SAF) blend starting January 2026, rising to 8% by 2036 (Advanced Biofuels USA, 2025). This is where Thailand’s ethanol surplus becomes a strategic asset.

Thailand’s 3.49 MLPD of unused ethanol capacity positions it as a potential regional leader in sustainable aviation fuel. The alcohol-to-jet (AtJ) conversion pathway can transform ethanol into jet-grade kerosene. With existing feedstock infrastructure (sugarcane and cassava), 28 operational plants, and a domestic SAF mandate creating guaranteed demand, Thailand doesn’t need to build a SAF industry from scratch. It needs to add conversion capacity to an ethanol industry that already has surplus. That’s a fundamentally different — and faster — path than competitors like Indonesia or Vietnam face.

What Incentives Support Bioenergy Investment?

Thailand offers a layered incentive structure for bioenergy — combining feed-in tariffs, tax holidays, and import duty exemptions. The key difference from solar or wind incentives: bioenergy gets longer contract terms and, for waste-to-energy, the highest BOI incentive tier available.

Feed-in Tariff rates (FiT)

Source: Watson Farley & Williams, 2022. These are ceiling rates under the ERC’s 2022-2030 FiT scheme. Actual awarded rates may be lower through competitive bidding.

BOI incentives

The Board of Investment classifies bioenergy projects into tiers (Lex Nova Partners, 2025):

• Category A1 (Waste-to-Energy) — 8-year corporate income tax exemption with no cap. This is the highest BOI tier, the same as EV manufacturing and advanced semiconductors. It signals maximum government priority.
• Category A2 (Biomass and Biogas) — 8-year CIT exemption with a cap on total exempted income. Still generous, but the cap limits benefit for very large projects.
• Biomass briquettes and pellets — 5-year CIT holiday plus import duty exemptions on equipment.

All categories include exemption from import duties on machinery and raw materials used in the project.

Who’s investing?

The largest bioenergy investors in Thailand tend to be energy conglomerates and agri-businesses: Gulf Energy (WtE), Banpu (biomass), Mitr Phol (sugarcane biomass), and various palm oil processors in the south. Foreign developers can access BOI incentives through standard application — there’s no restriction on foreign ownership for power generation projects.

Advanced: Thailand’s SAF Opportunity and the Ethanol Surplus

If you’re already tracking Thailand’s bioenergy sector, here’s the angle most analysts underplay: the country’s ethanol overcapacity isn’t a problem. It’s a launchpad for sustainable aviation fuel.

Thailand has 3.49 MLPD of idle ethanol capacity — half its total production infrastructure sits unused because domestic road fuel demand has plateaued (USDA FAS, 2024). The 1% SAF mandate starting January 2026 creates immediate domestic demand, with the target rising to 8% by 2036.

The conversion technology — alcohol-to-jet (AtJ) — is commercially proven. LanzaJet operates a plant in the US using ethanol feedstock. Thailand doesn’t need to pioneer the technology. It needs to license it and connect it to existing ethanol plants that are already running below capacity.

What makes Thailand’s position unusual in ASEAN:

1. Existing feedstock — Sugarcane and cassava supply chains are mature
2. Existing production — 28 ethanol plants with surplus capacity
3. Existing mandate — Guaranteed domestic demand via the SAF requirement
4. Aviation hub — Suvarnabhumi and Don Mueang handle 100+ million passengers annually, creating massive jet fuel demand

The constraint isn’t supply or demand. It’s the capital expenditure for AtJ conversion units and the lead time to build them. First movers will capture a market that’s mandated to grow for the next decade.

Frequently Asked Questions

What is Thailand’s largest bioenergy source?

Biomass from agricultural waste dominates Thailand’s bioenergy sector at 3,851 MW — more than five times the combined capacity of biogas (653 MW) and waste-to-energy (~50 MW) (Low Carbon Power / Ember, 2024). Sugarcane bagasse is the primary feedstock, followed by rice husks, rubber wood, and palm oil residues. Most biomass plants are co-located with sugar mills or rice mills.

Is waste-to-energy safe for nearby communities?

Modern WtE plants use high-temperature incineration (above 850°C) with flue gas treatment systems that meet EU emission standards. Bangkok’s planned On Nut facility — 1,000 tonnes/day, 35 MW — went through extensive community consultation and environmental impact assessment (Thai News, 2024). Air quality monitoring is mandatory. However, community opposition remains the biggest barrier to WtE expansion in Thailand.

How much does Thailand earn from bioenergy FiT rates?

FiT rates vary by technology: biomass receives 4.2-5.3 THB/kWh, biogas gets 2.0724 THB/kWh, and waste-to-energy earns the highest at 5.0-6.3 THB/kWh (Watson Farley & Williams, 2022). All contracts run 20 years. Projects in the three southern border provinces get an extra 0.50 THB/kWh premium. These are ceiling rates — actual awards may be lower.

Can a farm generate electricity from biogas in Thailand?

Yes. Livestock farms with sufficient manure volume can install anaerobic digesters to produce biogas and generate electricity. Large pig farms in Nakhon Ratchasima and Ratchaburi already do this. DEDE runs community biogas programs for smaller operations. The BOI offers Category A2 incentives (8-year CIT exemption), and grid connection is available through PEA at the biogas FiT rate of 2.0724 THB/kWh (Lex Nova Partners, 2025).

What is sustainable aviation fuel and how does Thailand plan to produce it?

SAF is jet fuel made from renewable feedstocks instead of petroleum. Thailand mandated a 1% SAF blend starting January 2026, rising to 8% by 2036 (Advanced Biofuels USA, 2025). The plan leverages Thailand’s surplus ethanol capacity — 3.49 MLPD of the country’s 6.92 MLPD total sits unused — using alcohol-to-jet conversion technology. Existing sugarcane and cassava supply chains provide the feedstock.

Conclusion

Thailand’s bioenergy sector is a study in uneven progress. Biomass is nearly mature at 3,851 MW — two-thirds of its 2037 target — built on decades of sugar and rice industry infrastructure. Biogas is halfway there at 653 MW, driven by cassava and palm oil waste processing. But waste-to-energy, despite the highest government incentives, is barely off the starting line at ~50 MW of the 900 MW target.

The three developments worth watching:

• Waste-to-energy construction boom — Gulf Energy’s THB 17.6 billion in 13 WtE projects and Bangkok’s On Nut plant represent the beginning of a buildout that needs to add 850 MW in 11 years
• SAF from surplus ethanol — Thailand’s 50% ethanol overcapacity, combined with a mandatory SAF blend starting 2026, creates a unique pathway that no ASEAN neighbor can match
• BOI signal — WtE receiving Category A1 (uncapped tax exemption) while biomass and biogas get A2 (capped) tells you exactly where the government wants capital flowing

For residents, bioenergy doesn’t offer a direct household option the way rooftop solar does. But it affects your electricity mix: that 6% of power from bioenergy displaces natural gas imports, which influences the Ft charge on every electricity bill. And if you’re near a farm or food processing facility, biogas is a proven technology that turns waste liability into revenue.