How to Get Government Biogas Subsidies in Thailand: PP1 and PP2 Program Guide

Thailand’s Department of Alternative Energy Development and Efficiency (DEDE) covers 50–72% of farm biogas system costs through two subsidy programs — PP1 and PP2. Most small and medium livestock farms qualify, yet thousands of eligible farmers haven’t applied. The subsidies slash upfront investment from nearly THB 190,000 to under THB 37,000 for the smallest systems.

This guide walks you through both programs: what they cover, who qualifies, how to apply, and what kind of returns you can expect. Whether you’re running a pig farm in Ratchaburi or a dairy operation in Saraburi, there’s likely a program that fits.

TL;DR: DEDE’s PP1 program covers 50% of biogas system costs for medium farms (500+ pigs), while PP2 covers 72% for smaller operations. With subsidies, payback drops to 3–4 years versus 7 without, according to research published in Applied Energy (ScienceDirect, 2009).

What Is Biogas and Why Does It Matter for Thai Farms?

Biogas is a renewable fuel produced when organic waste — manure, food scraps, crop residues — breaks down in an oxygen-free environment. The process is called anaerobic digestion. A sealed tank called a digester captures the gas, which is roughly 60% methane and 40% carbon dioxide.

For Thai livestock farms, biogas solves two problems at once. It turns a waste management headache into usable energy. Instead of letting manure sit in open lagoons (releasing methane into the atmosphere and stinking up the neighborhood), a digester captures that methane and converts it into electricity, heat, or cooking fuel.

Thailand has over 1,700 biogas plants already operating across the country (FFTC, 2022). The installed biogas power capacity reached 653 MW in 2023 (Statista, 2023). That’s not a niche technology — it’s a proven system with decades of track record in Thai agriculture.

What makes biogas particularly attractive for Thai farms isn’t just the energy savings. It’s the stacking effect. You reduce waste disposal costs, generate free electricity, potentially sell surplus power to the grid, and qualify for carbon credits — all from the same system. The government subsidies we’ll cover next make the economics even more compelling.

What Are the PP1 and PP2 Biogas Subsidy Programs?

DEDE subsidizes 50% of the THB 186,480 investment cost for PP1 systems and 72% of the THB 130,868 cost for PP2 systems (DEDE, 2024). These two programs target different farm sizes but share the same goal: making biogas affordable for livestock operations that would otherwise skip it.

PP1 (Paya Ngew Dam) is the medium-farm option. It includes a 70 cubic meter digester producing 17.3 m³ of biogas per day. The total system costs THB 186,480, and DEDE picks up half — leaving you with about THB 93,240 out of pocket.

PP2 (Tanee 1) targets smaller farms. Its 13 cubic meter digester produces 5.3 m³ of biogas daily. Total cost runs THB 130,868, but the 72% subsidy drops your share to just THB 36,643. That’s roughly the price of a decent smartphone.

Thailand’s DEDE provides two standardized biogas subsidy tiers for livestock farms: PP1 covers 50% of a THB 186,480 medium-scale system with a 70 m³ digester, while PP2 covers 72% of a THB 130,868 small-scale system with a 13 m³ digester (DEDE, 2024). Smaller farms actually receive a higher subsidy percentage, reflecting DEDE’s priority to bring biogas within reach of operations that couldn’t otherwise afford it.

Who Qualifies for PP1 and PP2?

In fiscal year 2012, DEDE subsidized 43 farms across Thailand — 18 under PP1 and 25 under PP2 — spanning pig, cow, buffalo, horse, and even partridge operations (DEDE, 2024). The eligibility criteria aren’t complicated, but they’re specific.

PP1 requirements:
– Farm generates at least 10 cubic meters of wastewater per day
– Equivalent to roughly 500 fattening pigs or proportional livestock
– Must have space for a 70 m³ digester installation
– Farm must be registered with the Department of Livestock Development

PP2 requirements:
– Farm generates at least 2 cubic meters of wastewater per day
– Suitable for smaller operations — think 50–100 pigs or a small dairy herd
– Space for a 13 m³ digester
– Same registration requirements as PP1

The 43 farms funded in FY2012 broke down as: 28 pig farms, 11 cow farms, 2 buffalo farms, 1 horse farm, and 1 partridge farm. Pig farms dominate because Thailand’s swine industry generates enormous volumes of liquid waste — and biogas digesters are the most cost-effective treatment method.

Don’t assume you’re too small for PP2. The 2 m³/day wastewater threshold is surprisingly low. A farm with just 50 pigs typically exceeds it. And with 72% of costs covered, the barrier isn’t really financial anymore — it’s awareness. Most eligible small farmers simply don’t know the program exists.

How Do You Apply for PP1 or PP2 Subsidies?

Government funds for biogas installation range from THB 20,000 to over THB 150,000 per farm, covering approximately 40–60% of total costs (FAO, 2023). Here’s the application process, step by step.

Step 1: Confirm Your Eligibility

Contact your provincial DEDE office or the Department of Livestock Development. They’ll assess your farm’s wastewater output and confirm whether PP1 or PP2 is the right fit. Bring your farm registration documents and recent livestock counts.

Step 2: Submit Your Application

File the subsidy application through DEDE’s regional office. You’ll need:
– Farm registration certificate
– Livestock headcount documentation
– Site plan showing proposed digester location
– Wastewater volume estimates (DEDE can help calculate this)

Step 3: Site Assessment

DEDE sends an engineer to inspect your farm. They’ll verify wastewater volumes, check the proposed installation site, and confirm the system specifications match your operation. This typically takes 2–4 weeks after application.

Step 4: Approval and Installation

Once approved, DEDE coordinates with certified contractors to install the standardized system. The PP1 or PP2 system design is fixed — you don’t need to source equipment yourself. DEDE’s approved contractors handle the full installation.

Step 5: Inspection and Commissioning

After installation, DEDE inspects the completed system before releasing the subsidy payment. The contractor handles commissioning and provides basic operator training.

What trips up most applicants? Incomplete wastewater documentation. Get your numbers right before you walk into the DEDE office. If you’re unsure about volumes, ask them to do a preliminary site visit — most regional offices will accommodate this informally.

What’s the Return on Investment?

With a 45% subsidy on digester installation, the payback period for a biogas-to-electricity system drops to approximately 4 years. Without any subsidy, that stretches to nearly 7 years (ScienceDirect, 2009). PP2’s 72% coverage likely pushes payback below 3 years.

The returns come from multiple streams:

Electricity savings. A PP1 system producing 17.3 m³ of biogas daily generates enough energy to offset a significant chunk of a medium farm’s electricity bill. At current retail rates above THB 4/kWh, that adds up fast.

Grid sales. If you register as a Very Small Power Producer (VSPP), you can sell surplus electricity at the feed-in tariff rate of THB 3.76/kWh under a 20-year contract (IEA, 2019). That’s guaranteed income for two decades.

Tax benefits. The Board of Investment (BOI) offers an 8-year corporate income tax exemption for biogas projects, plus import duty exemptions on equipment (BOI Thailand, 2025). These stack on top of the PP1/PP2 subsidies.

Waste management savings. No more paying for waste hauling or dealing with environmental complaints from neighbors. The digester handles it.

Here’s what most guides miss: the BOI tax exemption and the DEDE subsidy aren’t mutually exclusive. A farm can receive the PP1 or PP2 installation subsidy, sell power under the FiT, AND claim the 8-year tax exemption — triple-stacking incentives on a single biogas investment. That combination compresses payback even further than the headline numbers suggest.

Thailand’s Biogas Growth and Future Targets

Thailand’s installed biogas capacity reached 653 MW in 2023, and the AEDP 2024 plan targets 936 MW by 2037 — a 43% increase over current levels (Nation Thailand, 2024). Biogas isn’t the biggest slice of Thailand’s renewable energy pie, but it’s one of the most practical for rural areas.

The broader picture is ambitious. Thailand aims to generate 51% of its electricity from renewables by 2037, up from about 20% today (Nation Thailand, 2024). The AEDP 2024 targets 75 million tonnes of CO2 equivalent reductions by 2037 (Bangkok Post, 2024).

CPF, Thailand’s largest agribusiness company, already demonstrates what’s possible at scale. Its operations produced 48.61 million cubic meters of biogas in 2019, saving USD 7.8 million in energy costs and reducing emissions by 33,268 tonnes of CO2 equivalent (Springer, 2022). Smaller farms won’t hit those numbers, but the proportional savings are similar.

The available biogas potential from livestock manure alone is nearly ten times current generation levels (ScienceDirect, 2021). Thailand’s farms are sitting on an enormous untapped energy resource. Programs like PP1 and PP2 are designed to unlock it — but they only work if farmers actually apply.

Frequently Asked Questions

How much does a farm biogas system cost in Thailand?

Under the PP1 program, total system cost is THB 186,480 with a 50% DEDE subsidy, leaving THB 93,240 out of pocket. PP2 systems cost THB 130,868 total, but the 72% subsidy drops your share to THB 36,643 (DEDE, 2024). Larger custom systems for industrial operations can cost significantly more.

Can I sell electricity from my biogas system?

Yes. Register as a Very Small Power Producer (VSPP) with the Energy Regulatory Commission for systems up to 10 MW. The feed-in tariff for biogas from waste is THB 3.76/kWh under a 20-year contract (IEA, 2019). You’ll need a power purchase agreement with the local utility.

What size farm do I need for PP1 vs PP2?

PP1 requires at least 10 m³/day of wastewater — roughly 500 fattening pigs. PP2’s threshold is just 2 m³/day, suitable for farms with as few as 50 pigs. Both programs accept pig, cow, buffalo, and poultry operations (DEDE, 2024).

How long does the subsidy application take?

Expect 2–6 months from initial application to completed installation. The site assessment typically takes 2–4 weeks. Approval timelines vary by region and available budget. Apply early in the fiscal year (October) when funds are freshest.

Are there other incentives besides PP1 and PP2?

The Board of Investment offers an 8-year corporate income tax exemption for biogas projects plus import duty exemptions on equipment (BOI Thailand, 2025). You can stack BOI incentives with PP1/PP2 subsidies and VSPP feed-in tariff income — they’re not mutually exclusive.

Conclusion

Thailand’s PP1 and PP2 biogas subsidy programs offer one of the most accessible entry points into renewable energy for livestock farms:

• PP1 covers 50% of a THB 186,480 system for medium farms (500+ pigs)
• PP2 covers 72% of a THB 130,868 system for smaller operations
• Payback drops to 3–4 years with subsidies vs 7 without
• Stack with BOI tax exemptions and VSPP feed-in tariffs for maximum returns
• Apply through your provincial DEDE office with farm registration and livestock documentation

The hardest part isn’t qualifying — it’s knowing the programs exist. If you’re running livestock in Thailand and managing waste is costing you money or causing problems, visit your nearest DEDE regional office and ask about PP1/PP2 eligibility. The math works.